diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 19440b0..d8e5e7d 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -7,7 +7,7 @@ on:
   push:
     branches: [main]
   pull_request:
-    branches: ['**']
+    branches: ["**"]
   # Allow manually re-running the check from the Actions tab.
   workflow_dispatch:
 
@@ -28,7 +28,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: ['24.14']
+        node-version: ["24.14"]
 
     steps:
       # persist-credentials: false keeps the GITHUB_TOKEN out of .git/config, so a
diff --git a/CLAUDE.md b/CLAUDE.md
index 46c2c85..05b5e1e 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -23,19 +23,21 @@ IMPORTANT for AI agents: Do NOT run `gro dev` - the developer will manage the de
 
 - Svelte 5 - component framework with runes
 - SvelteKit - application framework with static adapter
-- fuz_css (`@fuzdev/fuz_css`) - CSS framework and design system
+- fuz_css (`@fuzdev/fuz_css`) - semantic-first CSS framework and design system
 - fuz_ui (`@fuzdev/fuz_ui`) - UI components, theming, docs system
 - fuz_util (`@fuzdev/fuz_util`) - utility functions
 - fuz_code (`@fuzdev/fuz_code`) - syntax highlighting
 - Gro (`@fuzdev/gro`) - build system and task runner
-- prettier + prettier-plugin-svelte - code formatting
+- tsv (via Gro) - code formatting
 - mdz (`@fuzdev/mdz`) - markdown preprocessor wired into `svelte.config.js`
 - `@fuzdev/tsv_wasm` - tsv's formatter + parser as WASM; powers the playground, loaded lazily in the browser
 
-Note: `@fuzdev/tsv_wasm` is loaded only on `/docs/playground` via a browser-only dynamic `import()`, so the ~900KB WASM never weighs down `/docs` or the prerendered pages.
+Note: `@fuzdev/tsv_wasm` is loaded only on `/docs/playground` via a browser-only dynamic `import()`, so the ~900KB-gzipped WASM (~2.9MB decoded) never weighs down `/docs` or the prerendered pages.
 
 Note: several devDependencies — `@webref/css` (CSS spec data), `zimmerframe` (AST traversal), `@sveltejs/acorn-typescript`, `zod`, and `@fuzdev/blake3_wasm` — are *optional peer dependencies* of `@fuzdev/fuz_css`'s `vite_plugin_fuz_css`, declared here so its build-time CSS generation resolves them (e.g. `css_literal.ts` imports `@webref/css`, `css_class_extractor.ts` walks ASTs with `zimmerframe`). They aren't imported by this app's own source, so don't mistake them for dead deps.
 
+Note: `vite` is deliberately held at 7.x (with `@sveltejs/vite-plugin-svelte` 6.x) — vite 8 + plugin-svelte 7 was buggy with this app or SvelteKit's integration. Don't upgrade to vite 8 without deliberately re-verifying the site works.
+
 ## Scope
 
 tsv.fuz.dev is the public face of the tsv tool:
@@ -56,8 +58,6 @@ tsv.fuz.dev is the public face of the tsv tool:
 
 ```
 src/
-├── lib/
-│   └── sample.ts             # placeholder constant (not yet wired up)
 ├── routes/
 │   ├── +page.svelte          # Home: hero, links to docs and benchmarks
 │   ├── +layout.svelte        # Root layout: fuz_css/fuz_code CSS, ThemeRoot, SiteState
@@ -81,23 +81,66 @@ src/
 Benchmark data comes from `tsv`. Full workflow to update:
 
 ```bash
-# 1. In ~/dev/tsv — run benchmarks (builds ffi + wasm automatically)
+# 1. In ~/dev/tsv — run benchmarks across deno/node/bun (builds artifacts automatically)
 deno task bench
 
-# 2. In ~/dev/tsv.fuz.dev — copy the latest result
+# 2. In ~/dev/tsv.fuz.dev — copy the latest results
 npm run update-benchmarks
 ```
 
-Step 1 writes `benches/deno/results/report.json` (committed to tsv).
-Step 2 copies it to `src/routes/docs/benchmarks/benchmarks.json`.
-The JSON format matches `BenchmarkBaseline` in `benchmark_data.ts`.
+Step 1 writes the per-runtime `benches/js/results/report.<runtime>.{json,md}`
+siblings, the composed cross-runtime `report.{json,md}`, and the conformance
+coverage report `report.conformance.node.json` (committed to tsv).
+Step 2 copies three of them — `report.node.json` → `benchmarks.json`, the
+composed `report.json` → `benchmarks_cross_runtime.json`, and
+`report.conformance.node.json` → `benchmarks_conformance.json` — then runs
+`gro format` over the copies. Note the script's source paths are hardcoded to
+`../tsv` — if the reports were generated in a different worktree, copy them
+into `~/dev/tsv` (or copy manually) first.
+The JSON formats match the types in `benchmark_data.ts`.
+
+The end-to-end CLI comparison against Prettier, Biome, and Oxfmt comes from a
+separate harness, a fork of Oxc's `bench-formatter` that adds tsv
+(../oxc-bench-formatter). It publishes no JSON — its numbers live only as the
+hyperfine console dump in its README, between the
+`<!-- BENCHMARK_RESULTS_START -->` / `END` markers, plus a `## Versions` list
+and a `_Measured on: …_` machine line. To update:
+
+```bash
+# 1. In ~/dev/oxc-bench-formatter — re-run and rewrite its README (needs a built ../tsv)
+pnpm run update-readme
+
+# 2. In ~/dev/tsv.fuz.dev — reparse the README into JSON
+gro gen
+```
+
+`benchmarks_formatters.gen.json.ts` parses that README and writes
+`benchmarks_formatters.json`, keeping only the scenarios tsv participates in
+(it has no JSX/TSX parser, so the harness runs it on the JSX-free corpora
+only).
+
+A **missing** sibling checkout is the one tolerated case — generation is
+skipped, the committed JSON stands, and `gro gen --check` passes on any machine
+or CI that has only this repo (CI never checks out the harness, so it always
+takes this path; no `--no-gen` needed). A README that **is** present but has
+drifted fails the task loudly, naming the scenario and the section that stopped
+parsing, rather than publishing stale or scenario-stripped numbers. A drift that
+still parses but renames a scenario is caught on the site side instead: every
+key in `benchmarks_cli.ts`'s `SCENARIO_COPY` must resolve to generated data, and
+a test asserts it.
 
 Key files in `src/routes/docs/benchmarks/`:
 
-- `benchmarks.json` — raw benchmark data (copied from tsv)
+- `benchmarks.json` — per-runtime Node report (copied from tsv)
+- `benchmarks_cross_runtime.json` — composed cross-runtime report (copied from tsv)
+- `benchmarks_conformance.json` — conformance parse-coverage report (copied from tsv)
+- `benchmarks_formatters.json` — formatter CLI comparison, generated from the sibling harness's README
 - `benchmark_data.ts` — TypeScript types matching the JSON format
-- `benchmarks.ts` — re-exports the JSON with types
+- `formatter_benchmark_data.ts` — types plus `parse_formatter_benchmarks`, the README parser
+- `benchmarks_cli.ts` — shapes `benchmarks_formatters.json` for `BenchmarksCli.svelte` and owns the per-scenario prose; the numbers are all generated
+- `benchmarks.ts`, `benchmarks_cross_runtime.ts`, `benchmarks_conformance.ts`, `benchmarks_formatters.ts` — re-export the JSON with types
 - `BenchmarksBar.svelte`, `BenchmarksGroup.svelte`, etc. — visualization components
+- `BenchmarksBaselineGroup.svelte` — shared interactive column behind the format, parse, and binary-size groups: hovering a row re-baselines that group's ratios (each of the three groups per section is independent), restoring the default anchor (the canonical reference — Prettier for format, the JS baseline for parse — and the smallest build for size) on mouseleave. `benchmark_data.ts`'s `compute_baseline_ratio`/`format_baseline_ratio`/`baseline_ratio_color` carry the per-`BaselineDirection` (`speed`/`size`) formulas it and the derivations share
 
 ## Architecture
 
@@ -105,6 +148,7 @@ Key files in `src/routes/docs/benchmarks/`:
 - Uses fuz_ui tome system for docs navigation
 - `docs/tomes.ts` defines the doc sections: introduction, playground, benchmarks
 - Benchmark data lives in `src/routes/docs/benchmarks/benchmarks.json` (see [Benchmarks](#benchmarks))
+- The benchmarks page quotes no hand-written ratios — its prose computes them from the same reports the charts render, via `benchmark_data.ts`'s `benchmark_speedup`/`format_ratio_approx`/`format_ratio_range` and `benchmarks_cli.ts`'s `cli_speedup_vs_tsv`/`cli_memory_ratio_range`. A test gates that every pair the copy names still resolves
 - `library.ts` builds component metadata at runtime from the `virtual:svelte-docinfo` module (provided by the `svelte-docinfo` Vite plugin); the docs index passes it to `DocsContent`
 - The playground (`/docs/playground`) loads `@fuzdev/tsv_wasm` via a browser-only dynamic `import()` inside `Playground.svelte`, so the WASM code-splits into its own chunk fetched only on that route — the same lazy discipline `library.ts` uses for the heavy svelte-docinfo data, keeping `/docs` and the prerendered pages WASM-free. `@fuzdev/tsv_wasm` is in `vite.config.ts` `optimizeDeps.exclude` (like `blake3_wasm`)
 - The playground's editor is fuz_code's `CodeTextarea` (live syntax highlighting via the experimental CSS Custom Highlight API). It needs `@fuzdev/fuz_code/theme_highlight.css`, imported inside `Playground.svelte` rather than the root layout so it stays on this route only; `supports_css_highlight_api()` drives a graceful-degradation note where the API is unavailable (the editor still works, unstyled)
@@ -117,7 +161,7 @@ Deploys to `https://tsv.fuz.dev/` via `gro deploy` (builds and pushes to deploy
 
 - TypeScript strict mode
 - Svelte 5 with runes API
-- Prettier with tabs, 100 char width
+- tsv with tabs, 100 char width
 - Node >= 24.14
 - Private package (not published to npm)
 
diff --git a/package-lock.json b/package-lock.json
index ee9152a..f1da569 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,31 +14,28 @@
         "@fuzdev/fuz_css": "^0.63.2",
         "@fuzdev/fuz_ui": "^0.206.5",
         "@fuzdev/fuz_util": "^0.65.2",
-        "@fuzdev/gro": "^0.205.1",
+        "@fuzdev/gro": "^0.206.0",
         "@fuzdev/mdz": "^0.2.0",
         "@fuzdev/tsv_wasm": "^0.1.0",
         "@ryanatkn/eslint-config": "^0.12.1",
         "@sveltejs/acorn-typescript": "^1.0.9",
         "@sveltejs/adapter-static": "^3.0.10",
-        "@sveltejs/kit": "^2.61.1",
-        "@sveltejs/vite-plugin-svelte": "^7.1.2",
+        "@sveltejs/kit": "^2.69.1",
+        "@sveltejs/vite-plugin-svelte": "^6.2.4",
         "@types/estree": "^1.0.8",
         "@types/node": "^24.12.4",
         "@webref/css": "^8.2.0",
         "eslint": "^9.39.1",
         "eslint-plugin-svelte": "^3.13.1",
         "esm-env": "^1.2.2",
-        "magic-string": "^0.30.21",
-        "prettier": "^3.7.4",
-        "prettier-plugin-svelte": "^3.4.1",
-        "svelte": "^5.56.0",
-        "svelte-check": "^4.3.6",
+        "svelte": "^5.56.4",
+        "svelte-check": "^4.7.2",
         "svelte-docinfo": "^0.5.4",
         "svelte2tsx": "^0.7.47",
         "tslib": "^2.8.1",
         "typescript": "^5.9.3",
         "typescript-eslint": "^8.48.1",
-        "vite": "^8.0.16",
+        "vite": "^7.3.6",
         "vitest": "^4.1.9",
         "zimmerframe": "^1.1.4",
         "zod": "^4.3.6"
@@ -54,6 +51,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "@emnapi/wasi-threads": "1.2.1",
         "tslib": "^2.4.0"
@@ -66,6 +64,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "tslib": "^2.4.0"
       }
@@ -77,6 +76,7 @@
       "dev": true,
       "license": "MIT",
       "optional": true,
+      "peer": true,
       "dependencies": {
         "tslib": "^2.4.0"
       }
@@ -94,7 +94,6 @@
       "os": [
         "aix"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -112,7 +111,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -130,7 +128,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -148,7 +145,6 @@
       "os": [
         "android"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -166,7 +162,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -184,7 +179,6 @@
       "os": [
         "darwin"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -202,7 +196,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -220,7 +213,6 @@
       "os": [
         "freebsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -238,7 +230,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -256,7 +247,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -274,7 +264,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -292,7 +281,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -310,7 +298,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -328,7 +315,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -346,7 +332,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -364,7 +349,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -382,7 +366,6 @@
       "os": [
         "linux"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -400,7 +383,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -418,7 +400,6 @@
       "os": [
         "netbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -436,7 +417,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -454,7 +434,6 @@
       "os": [
         "openbsd"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -472,7 +451,6 @@
       "os": [
         "openharmony"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -490,7 +468,6 @@
       "os": [
         "sunos"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -508,7 +485,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -526,7 +502,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -544,7 +519,6 @@
       "os": [
         "win32"
       ],
-      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -884,18 +858,17 @@
       }
     },
     "node_modules/@fuzdev/gro": {
-      "version": "0.205.1",
-      "resolved": "https://registry.npmjs.org/@fuzdev/gro/-/gro-0.205.1.tgz",
-      "integrity": "sha512-o5WBXWSH/UlN1BsDnpBNIi0WHR7lj7UFGltH/JctSP7oSB2ojvmoXD5OLCEeVdRVcDaSQKl48xcXKUwHKqVSmQ==",
+      "version": "0.206.0",
+      "resolved": "https://registry.npmjs.org/@fuzdev/gro/-/gro-0.206.0.tgz",
+      "integrity": "sha512-11nkTAEWDOvkgzynRChQS+bj3tc7R0NduB+eHLXzXZJqz66nc/oop8Ttvz0UkjTBPX/zzgtU8QuDDNyA7buf5A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
+        "@fuzdev/tsv_wasm": "^0.1.0",
         "chokidar": "^5.0.0",
         "dotenv": "^17.2.3",
         "esm-env": "^1.2.2",
         "oxc-parser": "^0.99.0",
-        "prettier": "^3.7.4",
-        "prettier-plugin-svelte": "^3.5.1",
         "ts-blank-space": "^0.6.2",
         "tslib": "^2.8.1"
       },
@@ -1393,27 +1366,38 @@
       "dev": true,
       "license": "MIT"
     },
-    "node_modules/@rolldown/binding-android-arm64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.0.3.tgz",
-      "integrity": "sha512-454rs7jHngixp/NMxd5srYD57OnzSlZ/eFTETjORQHLwJG1lRtmNOJcBerZlfu4GjKqeq8aCCIQrMdHyhI51Hw==",
+    "node_modules/@rollup/rollup-android-arm-eabi": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm-eabi/-/rollup-android-arm-eabi-4.62.2.tgz",
+      "integrity": "sha512-6o7ZLZK+BeenkZCFNDXqpbjw9bD6nuWonvS/lwQJp7NoVVxm6p3qE7qQ5jGuBjiFsgvqjD8mZAU5oWxTmbOeOg==",
       "cpu": [
-        "arm64"
+        "arm"
       ],
       "dev": true,
       "license": "MIT",
       "optional": true,
       "os": [
         "android"
+      ]
+    },
+    "node_modules/@rollup/rollup-android-arm64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-android-arm64/-/rollup-android-arm64-4.62.2.tgz",
+      "integrity": "sha512-BaH7BllCACHoH1LguOU56UItGfUWjujlO65kS9LAodViaN4bwIKd7oeW/ZHJ/4ljr/7MIiENnNy3HJ0zXv8Zkw==",
+      "cpu": [
+        "arm64"
       ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ]
     },
-    "node_modules/@rolldown/binding-darwin-arm64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-arm64/-/binding-darwin-arm64-1.0.3.tgz",
-      "integrity": "sha512-PcAhP+ynjURNyy8SKGl5DQP94aGuB/7JrXJb/t7P+hanXvQVMWzUvRRhBAcg/lNRadBhoUPqSoP4xw5tR/KBEA==",
+    "node_modules/@rollup/rollup-darwin-arm64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-arm64/-/rollup-darwin-arm64-4.62.2.tgz",
+      "integrity": "sha512-v39RCCvj4He82I9sFmk+M1VZ0PLM9sfsLVikjfx2hYBNALhrrOR2D3JjQA6AhlaSOgcR+RzrKY7e1+bT6SUO/A==",
       "cpu": [
         "arm64"
       ],
@@ -1422,15 +1406,12 @@
       "optional": true,
       "os": [
         "darwin"
-      ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      ]
     },
-    "node_modules/@rolldown/binding-darwin-x64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-darwin-x64/-/binding-darwin-x64-1.0.3.tgz",
-      "integrity": "sha512-9YpfeUvSE2RS7wysJ81uOZkXJz7f7Q55H2Gvp3VEw/EsahqDtrphrZ0EwDLK5vvKOzaCrBsjF8JmnMLcUt78Gg==",
+    "node_modules/@rollup/rollup-darwin-x64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-darwin-x64/-/rollup-darwin-x64-4.62.2.tgz",
+      "integrity": "sha512-yl0y2vq3S3lHeuXhEdss6TWfKW8vkujImO12tn4ZkG/4oghr09LvdYm2RElVjokTQiUvDUGXLGsYeLqUMCKpGA==",
       "cpu": [
         "x64"
       ],
@@ -1439,15 +1420,26 @@
       "optional": true,
       "os": [
         "darwin"
+      ]
+    },
+    "node_modules/@rollup/rollup-freebsd-arm64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-freebsd-arm64/-/rollup-freebsd-arm64-4.62.2.tgz",
+      "integrity": "sha512-tT4pvt4qXD+vEoezupCWi+a1F0vvDiksiHc+PxRlYTOH1I6/X4id9jPxTP+Fg+545euaFT1jJVs4CEdHZAU1vw==",
+      "cpu": [
+        "arm64"
       ],
-      "engines": {
-        "node": "^20.19.0 || >=22.12.0"
-      }
+      "dev": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "freebsd"
+      ]
     },
-    "node_modules/@rolldown/binding-freebsd-x64": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/@rolldown/binding-freebsd-x64/-/binding-freebsd-x64-1.0.3.tgz",
-      "integrity": "sha512-yB1IlAsSNHncV6SCTL27/MVGR5htvQsoGxIv5KMGXALp+Ll1wYsn+x98M9MW7qa+NdSbvrrY7ANI4wLJ0n1e6g==",
+    "node_modules/@rollup/rollup-freebsd-x64": {
+      "version": "4.62.2",
+      "resolved": "https://registry.npmjs.org/@rollup/rollup-freebsd-x64/-/rollup-freebsd-x64-4.62.2.tgz",
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+        "@rollup/rollup-openharmony-arm64": "4.62.2",
+        "@rollup/rollup-win32-arm64-msvc": "4.62.2",
+        "@rollup/rollup-win32-ia32-msvc": "4.62.2",
+        "@rollup/rollup-win32-x64-gnu": "4.62.2",
+        "@rollup/rollup-win32-x64-msvc": "4.62.2",
+        "fsevents": "~2.3.2"
       }
     },
     "node_modules/sade": {
@@ -4120,9 +3919,9 @@
       }
     },
     "node_modules/svelte": {
-      "version": "5.56.0",
-      "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.56.0.tgz",
-      "integrity": "sha512-kTXr26t1bchFp28ROrb957LtbujpBmBDibmqMGziVpUs7awBi96TGgX6SovrA8BNoEUDVRK2Fb9FkeYlGspoVg==",
+      "version": "5.56.4",
+      "resolved": "https://registry.npmjs.org/svelte/-/svelte-5.56.4.tgz",
+      "integrity": "sha512-/d0QHehmRuJW8gVz395MTkPcPozxzdjBMBE8oEYGz8O3b9KTMzzQ9ZHJQLuFKOHOPQbU6kx/X4iid/EBBzH7iw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4137,7 +3936,7 @@
         "clsx": "^2.1.1",
         "devalue": "^5.8.1",
         "esm-env": "^1.2.1",
-        "esrap": "^2.2.9",
+        "esrap": "^2.2.12",
         "is-reference": "^3.0.3",
         "locate-character": "^3.0.0",
         "magic-string": "^0.30.11",
@@ -4148,13 +3947,14 @@
       }
     },
     "node_modules/svelte-check": {
-      "version": "4.3.6",
-      "resolved": "https://registry.npmjs.org/svelte-check/-/svelte-check-4.3.6.tgz",
-      "integrity": "sha512-uBkz96ElE3G4pt9E1Tw0xvBfIUQkeH794kDQZdAUk795UVMr+NJZpuFSS62vcmO/DuSalK83LyOwhgWq8YGU1Q==",
+      "version": "4.7.2",
+      "resolved": "https://registry.npmjs.org/svelte-check/-/svelte-check-4.7.2.tgz",
+      "integrity": "sha512-GoS4XJdGswlq0rIT1vtFLzJY1bvHtY37McY9H9Gkm1Ggw/ICdZYn8J/Z8Yi0BEL0i3R4+jtaWVePjyppMlij/A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@jridgewell/trace-mapping": "^0.3.25",
+        "@sveltejs/load-config": "^0.2.0",
         "chokidar": "^4.0.1",
         "fdir": "^6.2.0",
         "picocolors": "^1.0.0",
@@ -4432,17 +4232,18 @@
       "license": "MIT"
     },
     "node_modules/vite": {
-      "version": "8.0.16",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.16.tgz",
-      "integrity": "sha512-h9bXPmJichP5fLmVQo3PyaGSDE2n3aPuomeAlVRm0JLmt4rY6zmPKd59HYI4LNW8oTK7tlTsuC7l/m7awx9Jcw==",
+      "version": "7.3.6",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.6.tgz",
+      "integrity": "sha512-4XP60spRGjSZFf1qYH+dJIkK2znL3zQfl9KkOV9MkkRR/3Dls0dxaBsQPTloEc5BLXWPL9vsOxopxyKoMmDueg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "lightningcss": "^1.32.0",
-        "picomatch": "^4.0.4",
-        "postcss": "^8.5.15",
-        "rolldown": "1.0.3",
-        "tinyglobby": "^0.2.17"
+        "esbuild": "^0.27.0 || ^0.28.0",
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.3",
+        "postcss": "^8.5.6",
+        "rollup": "^4.43.0",
+        "tinyglobby": "^0.2.15"
       },
       "bin": {
         "vite": "bin/vite.js"
@@ -4458,10 +4259,9 @@
       },
       "peerDependencies": {
         "@types/node": "^20.19.0 || >=22.12.0",
-        "@vitejs/devtools": "^0.1.18",
-        "esbuild": "^0.27.0 || ^0.28.0",
         "jiti": ">=1.21.0",
         "less": "^4.0.0",
+        "lightningcss": "^1.21.0",
         "sass": "^1.70.0",
         "sass-embedded": "^1.70.0",
         "stylus": ">=0.54.8",
@@ -4474,18 +4274,15 @@
         "@types/node": {
           "optional": true
         },
-        "@vitejs/devtools": {
-          "optional": true
-        },
-        "esbuild": {
-          "optional": true
-        },
         "jiti": {
           "optional": true
         },
         "less": {
           "optional": true
         },
+        "lightningcss": {
+          "optional": true
+        },
         "sass": {
           "optional": true
         },
diff --git a/package.json b/package.json
index e1c6a86..3f5f169 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
     "test": "gro test",
     "preview": "vite preview",
     "deploy": "gro deploy",
-    "update-benchmarks": "cp ../tsv/benches/deno/results/report.json src/routes/docs/benchmarks/benchmarks.json"
+    "update-benchmarks": "cp ../tsv/benches/js/results/report.node.json src/routes/docs/benchmarks/benchmarks.json && cp ../tsv/benches/js/results/report.json src/routes/docs/benchmarks/benchmarks_cross_runtime.json && cp ../tsv/benches/js/results/report.conformance.node.json src/routes/docs/benchmarks/benchmarks_conformance.json && gro format"
   },
   "type": "module",
   "engines": {
@@ -24,56 +24,36 @@
   },
   "devDependencies": {
     "@fuzdev/blake3_wasm": "^0.1.1",
-    "@fuzdev/fuz_code": "^0.46.3",
+    "@fuzdev/fuz_code": "^0.48.0",
     "@fuzdev/fuz_css": "^0.63.2",
-    "@fuzdev/fuz_ui": "^0.206.5",
+    "@fuzdev/fuz_ui": "^0.206.7",
     "@fuzdev/fuz_util": "^0.65.2",
-    "@fuzdev/gro": "^0.205.1",
-    "@fuzdev/mdz": "^0.2.0",
-    "@fuzdev/tsv_wasm": "^0.1.0",
-    "@ryanatkn/eslint-config": "^0.12.1",
+    "@fuzdev/gro": "^0.208.0",
+    "@fuzdev/mdz": "^0.3.0",
+    "@fuzdev/tsv_wasm": "^0.2.0",
+    "@ryanatkn/eslint-config": "^0.12.2",
     "@sveltejs/acorn-typescript": "^1.0.9",
     "@sveltejs/adapter-static": "^3.0.10",
-    "@sveltejs/kit": "^2.61.1",
-    "@sveltejs/vite-plugin-svelte": "^7.1.2",
+    "@sveltejs/kit": "^2.69.1",
+    "@sveltejs/vite-plugin-svelte": "^6.2.4",
     "@types/estree": "^1.0.8",
     "@types/node": "^24.12.4",
     "@webref/css": "^8.2.0",
     "eslint": "^9.39.1",
     "eslint-plugin-svelte": "^3.13.1",
     "esm-env": "^1.2.2",
-    "magic-string": "^0.30.21",
-    "prettier": "^3.7.4",
-    "prettier-plugin-svelte": "^3.4.1",
-    "svelte": "^5.56.0",
-    "svelte-check": "^4.3.6",
+    "svelte": "^5.56.4",
+    "svelte-check": "^4.7.2",
     "svelte-docinfo": "^0.5.4",
     "svelte2tsx": "^0.7.47",
     "tslib": "^2.8.1",
     "typescript": "^5.9.3",
     "typescript-eslint": "^8.48.1",
-    "vite": "^8.0.16",
+    "vite": "^7.3.6",
     "vitest": "^4.1.9",
     "zimmerframe": "^1.1.4",
     "zod": "^4.3.6"
   },
-  "prettier": {
-    "plugins": [
-      "prettier-plugin-svelte"
-    ],
-    "useTabs": true,
-    "printWidth": 100,
-    "singleQuote": true,
-    "bracketSpacing": false,
-    "overrides": [
-      {
-        "files": "package.json",
-        "options": {
-          "useTabs": false
-        }
-      }
-    ]
-  },
   "sideEffects": [
     "**/*.css"
   ],
diff --git a/src/app.d.ts b/src/app.d.ts
index 8364d73..b9e1d38 100644
--- a/src/app.d.ts
+++ b/src/app.d.ts
@@ -6,7 +6,7 @@ declare module 'virtual:fuz.css' {
 	export default css;
 }
 declare module 'virtual:pkg.json' {
-	import type {PkgJson} from '@fuzdev/fuz_util/pkg_json.ts';
+	import type { PkgJson } from '@fuzdev/fuz_util/pkg_json.ts';
 	const pkg_json: PkgJson;
 	export default pkg_json;
 }
diff --git a/src/app.html b/src/app.html
index e3061bc..a1c58fd 100644
--- a/src/app.html
+++ b/src/app.html
@@ -1,23 +1,29 @@
 <!doctype html>
 <html lang="en">
-	<head>
-		<meta charset="utf-8" />
-		<link rel="icon" href="%sveltekit.assets%/favicon.png" />
-		<link rel="icon" href="%sveltekit.assets%/logo.svg" sizes="any" type="image/svg+xml" />
-		<meta name="viewport" content="width=device-width, initial-scale=1" />
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%sveltekit.assets%/favicon.png" />
+    <link
+      rel="icon"
+      href="%sveltekit.assets%/logo.svg"
+      sizes="any"
+      type="image/svg+xml"
+    />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
 
-		<script>
-			document.documentElement.classList.add(
-				((c) =>
-					c === 'dark' || (c !== 'light' && matchMedia('(prefers-color-scheme:dark)').matches)
-						? 'dark'
-						: 'light')(localStorage.getItem('fuz:color-scheme')),
-			);
-		</script>
+    <script>
+      document.documentElement.classList.add(
+        ((c) =>
+          c === "dark" ||
+          (c !== "light" && matchMedia("(prefers-color-scheme:dark)").matches)
+            ? "dark"
+            : "light")(localStorage.getItem("fuz:color-scheme")),
+      );
+    </script>
 
-		%sveltekit.head%
-	</head>
-	<body data-sveltekit-preload-data="hover">
-		<div style="display: contents">%sveltekit.body%</div>
-	</body>
+    %sveltekit.head%
+  </head>
+  <body data-sveltekit-preload-data="hover">
+    <div style="display: contents">%sveltekit.body%</div>
+  </body>
 </html>
diff --git a/src/lib/sample.ts b/src/lib/sample.ts
deleted file mode 100644
index 429c922..0000000
--- a/src/lib/sample.ts
+++ /dev/null
@@ -1 +0,0 @@
-export const sample = 'TODO - publish tsv!';
diff --git a/src/routes/+layout.svelte b/src/routes/+layout.svelte
index 1e580bb..6411db4 100644
--- a/src/routes/+layout.svelte
+++ b/src/routes/+layout.svelte
@@ -4,13 +4,13 @@
 	import './style.css';
 
 	import ThemeRoot from '@fuzdev/fuz_ui/ThemeRoot.svelte';
-	import {SiteState, site_context} from '@fuzdev/fuz_ui/site.svelte.ts';
-	import {logo_tsv} from '@fuzdev/fuz_ui/logos.ts';
-	import type {Snippet} from 'svelte';
+	import { SiteState, site_context } from '@fuzdev/fuz_ui/site.svelte.ts';
+	import { logo_tsv } from '@fuzdev/fuz_ui/logos.ts';
+	import type { Snippet } from 'svelte';
 	import pkg_json from 'virtual:pkg.json';
 
 	const {
-		children,
+		children
 	}: {
 		children: Snippet;
 	} = $props();
@@ -19,7 +19,7 @@
 	// and `repo_url` points to the tsv tool repo rather than this website's repo
 	// (`pkg_json.repository`).
 	site_context.set(
-		new SiteState({icon: logo_tsv, pkg_json, repo_url: 'https://github.com/fuzdev/tsv'}),
+		new SiteState({ icon: logo_tsv, pkg_json, repo_url: 'https://github.com/fuzdev/tsv' })
 	);
 </script>
 
diff --git a/src/routes/+page.svelte b/src/routes/+page.svelte
index e98aa2e..13a24d8 100644
--- a/src/routes/+page.svelte
+++ b/src/routes/+page.svelte
@@ -1,10 +1,10 @@
 <script lang="ts">
-	import {resolve} from '$app/paths';
+	import { resolve } from '$app/paths';
 	import DocsFooter from '@fuzdev/fuz_ui/DocsFooter.svelte';
-	import {FUZ_DEV_URL} from '@fuzdev/fuz_ui/constants.ts';
-	import {site_context} from '@fuzdev/fuz_ui/site.svelte.ts';
+	import { FUZ_DEV_URL } from '@fuzdev/fuz_ui/constants.ts';
+	import { site_context } from '@fuzdev/fuz_ui/site.svelte.ts';
 	import Svg from '@fuzdev/fuz_ui/Svg.svelte';
-	import {logo_tsv} from '@fuzdev/fuz_ui/logos.ts';
+	import { logo_tsv } from '@fuzdev/fuz_ui/logos.ts';
 
 	const site = site_context.get();
 </script>
diff --git a/src/routes/docs/+layout.svelte b/src/routes/docs/+layout.svelte
index a161ea3..28a2d09 100644
--- a/src/routes/docs/+layout.svelte
+++ b/src/routes/docs/+layout.svelte
@@ -1,13 +1,13 @@
 <script lang="ts">
-	import type {Snippet} from 'svelte';
+	import type { Snippet } from 'svelte';
 	import Docs from '@fuzdev/fuz_ui/Docs.svelte';
-	import {Library, library_context} from '@fuzdev/fuz_ui/library.svelte.ts';
+	import { Library, library_context } from '@fuzdev/fuz_ui/library.svelte.ts';
 
-	import {tomes} from './tomes.ts';
-	import {library_json} from '$routes/library.ts';
+	import { tomes } from './tomes.ts';
+	import { library_json } from '$routes/library.ts';
 
 	const {
-		children,
+		children
 	}: {
 		children: Snippet;
 	} = $props();
diff --git a/src/routes/docs/+page.svelte b/src/routes/docs/+page.svelte
index 16a118e..735443a 100644
--- a/src/routes/docs/+page.svelte
+++ b/src/routes/docs/+page.svelte
@@ -1,7 +1,7 @@
 <script lang="ts">
 	import DocsContent from '@fuzdev/fuz_ui/DocsContent.svelte';
-	import {tomes_context} from '@fuzdev/fuz_ui/tome.ts';
-	import {library_context} from '@fuzdev/fuz_ui/library.svelte.ts';
+	import { tomes_context } from '@fuzdev/fuz_ui/tome.ts';
+	import { library_context } from '@fuzdev/fuz_ui/library.svelte.ts';
 
 	const get_tomes_by_slug = tomes_context.get();
 	const tomes = $derived(Array.from(get_tomes_by_slug().values()));
diff --git a/src/routes/docs/benchmarks/+page.svelte b/src/routes/docs/benchmarks/+page.svelte
index ef80d88..6e447e9 100644
--- a/src/routes/docs/benchmarks/+page.svelte
+++ b/src/routes/docs/benchmarks/+page.svelte
@@ -2,18 +2,34 @@
 	import TomeContent from '@fuzdev/fuz_ui/TomeContent.svelte';
 	import TomeSection from '@fuzdev/fuz_ui/TomeSection.svelte';
 	import TomeSectionHeader from '@fuzdev/fuz_ui/TomeSectionHeader.svelte';
-	import {tome_get_by_slug} from '@fuzdev/fuz_ui/tome.ts';
+	import { tome_get_by_slug } from '@fuzdev/fuz_ui/tome.ts';
 
-	import {benchmarks_json} from './benchmarks.ts';
+	import { benchmarks_json } from './benchmarks.ts';
+	import { benchmarks_conformance_json } from './benchmarks_conformance.ts';
+	import { benchmarks_cross_runtime_json } from './benchmarks_cross_runtime.ts';
 	import {
-		category_color,
+		benchmarks_cli,
+		cli_memory_ratio_range,
+		cli_speedup_vs_tsv,
+		CLI_TS_REPO_KEY
+	} from './benchmarks_cli.ts';
+	import {
+		benchmark_speedup,
 		derive_benchmark_groups,
+		derive_conformance_groups,
 		derive_speedup_summary,
+		format_corpus_source_files,
+		format_ratio_approx,
+		format_ratio_range,
+		corpus_source_url
 	} from './benchmark_data.ts';
 	import BenchmarksSummary from './BenchmarksSummary.svelte';
 	import BenchmarksGroup from './BenchmarksGroup.svelte';
+	import BenchmarksConformance from './BenchmarksConformance.svelte';
 	import BenchmarksSizes from './BenchmarksSizes.svelte';
 	import BenchmarksMeta from './BenchmarksMeta.svelte';
+	import BenchmarksCrossRuntime from './BenchmarksCrossRuntime.svelte';
+	import BenchmarksCli from './BenchmarksCli.svelte';
 
 	const LIBRARY_ITEM_NAME = 'benchmarks';
 
@@ -21,129 +37,342 @@
 
 	const groups = derive_benchmark_groups(benchmarks_json);
 	const speedup_rows = derive_speedup_summary(groups);
+	const conformance_groups = derive_conformance_groups(benchmarks_conformance_json);
 
 	const corpus = $derived(benchmarks_json.corpus);
+	// Derived from the report so the "What's measured" figure can't drift from the
+	// copied data (the report carries per-language file counts, not bytes).
+	const corpus_file_count = $derived(Object.values(corpus).reduce((sum, n) => sum + n, 0));
 	const format_groups = groups.filter((g) => g.operation === 'format');
 	const parse_groups = groups.filter((g) => g.operation === 'parse');
+
+	// Every ratio the TLDR and the section notes quote, computed from the same
+	// reports the charts render so the prose can't drift from them. Native-vs-native
+	// pairs tsv with oxfmt, wasm-vs-wasm pairs tsv_wasm with biome-wasm; the parse
+	// comparison uses tsv's span-only wire, the shape oxc-parser also emits.
+	const speedup = (group: string, slower: string, faster: string) =>
+		format_ratio_approx(benchmark_speedup(benchmarks_json, group, slower, faster));
+	const format_ts_vs_oxfmt = speedup('format/typescript', 'oxfmt', 'tsv');
+	const format_ts_vs_prettier = speedup('format/typescript', 'prettier', 'tsv');
+	const format_ts_vs_biome = speedup('format/typescript', 'biome-wasm', 'tsv_wasm');
+	const format_svelte_vs_prettier = speedup('format/svelte', 'prettier', 'tsv');
+	const format_svelte_vs_biome = speedup('format/svelte', 'biome-wasm', 'tsv_wasm');
+	const format_css_vs_oxfmt = speedup('format/css', 'oxfmt', 'tsv');
+	const format_css_vs_biome = speedup('format/css', 'biome-wasm', 'tsv_wasm');
+	const parse_ts_vs_oxc = speedup('parse/typescript', 'oxc-parser', 'tsv-json-no-locations');
+
+	// The end-to-end CLI claims, from the formatter-comparison report.
+	const cli_ts_wall_vs_oxfmt = format_ratio_approx(
+		cli_speedup_vs_tsv(CLI_TS_REPO_KEY, 'oxfmt', 'wall_ms')
+	);
+	const cli_ts_cpu_vs_oxfmt = format_ratio_approx(
+		cli_speedup_vs_tsv(CLI_TS_REPO_KEY, 'oxfmt', 'cpu_ms')
+	);
+	const cli_ts_wall_vs_biome = format_ratio_approx(
+		cli_speedup_vs_tsv(CLI_TS_REPO_KEY, 'biome', 'wall_ms')
+	);
+	const cli_ts_memory = cli_memory_ratio_range(CLI_TS_REPO_KEY);
+	const cli_memory = cli_memory_ratio_range();
 </script>
 
 <TomeContent {tome}>
 	<section>
 		<p>
-			tsv is a toolchain for TypeScript/JS, CSS, and Svelte in Rust. Performance is its priority
-			after correctness, and the numbers compare favorably to Oxc and Biome for its supported
-			languages.
+			tsv is a toolchain for TypeScript/JS, CSS, and Svelte in Rust. After correctness, performance
+			is tsv's next priority. This page shows how it measures up against Prettier, which tsv closely
+			follows, and against Oxc and Biome, which are similar tools with wider language support (tsv
+			doesn't support JSX/TSX/SCSS/etc).
 		</p>
 	</section>
 
-	<section>
-		<div class="legend">
-			<span><i class="swatch" style:background={category_color('tsv_native')}></i> tsv native</span>
-			<span
-				><i class="swatch" style:background={category_color('tsv_native_json')}></i> tsv native json</span
-			>
-			<span><i class="swatch" style:background={category_color('tsv_wasm')}></i> tsv wasm</span>
-			<span
-				><i class="swatch" style:background={category_color('tsv_wasm_json')}></i> tsv wasm json</span
-			>
-			<span><i class="swatch" style:background={category_color('biome')}></i> biome</span>
-			<span><i class="swatch" style:background={category_color('oxc')}></i> oxc</span>
-			<span><i class="swatch" style:background={category_color('canonical')}></i> canonical</span>
-		</div>
-	</section>
-
 	<TomeSection>
-		<TomeSectionHeader text="Binary size" />
+		<TomeSectionHeader text="TLDR" />
 		<p>
-			Rather than supporting many languages, tsv focuses on Svelte/HTML, TypeScript/JS, and CSS.
-			This lets it be smaller when it's all you need, a quality that's more relevant when used in
-			the browser via wasm:
+			Compared to Oxc and Biome, tsv is faster, smaller, and uses less memory to parse and format
+			its supported languages. This section has a prose summary; skip ahead for charts.
 		</p>
-		<BenchmarksSizes sizes={benchmarks_json.binary_sizes} />
+		<p>
+			The measurements on this page are single-threaded and in-process, where each tool parses or
+			formats one file at a time (isolating engine speed from multi-core parallelism), measured over
+			a large collection of real-world repos: {corpus_file_count.toLocaleString('en-US')} files including
+			Svelte's official repos (svelte, kit, svelte.dev) and the
+			<a href="https://github.com/fuzdev">fuz.dev repos</a>. On that basis:
+		</p>
+		<ul>
+			<li>
+				Formatting TypeScript, tsv is ~{format_ts_vs_oxfmt} faster than Oxfmt (native-vs-native), ~{format_ts_vs_prettier}
+				faster than Prettier (native Rust vs Prettier's JS), and ~{format_ts_vs_biome} faster than Biome
+				(wasm-vs-wasm).
+			</li>
+			<li>
+				Formatting Svelte, tsv is is ~{format_svelte_vs_prettier} faster than Prettier (which Oxfmt's
+				Svelte path delegates to internally) and {format_svelte_vs_biome} faster than Biome.
+			</li>
+			<li>
+				Formatting CSS, it's ~{format_css_vs_oxfmt} faster than Oxfmt and {format_css_vs_biome} faster
+				than Biome.
+			</li>
+			<li>
+				Parsing TypeScript to JSON, tsv is ~{parse_ts_vs_oxc} faster than Oxc; Biome doesn't expose its
+				parser to JS. tsv's default AST adds a per-node line/column <code>loc</code> for drop-in Svelte
+				compatibility, with a fast path to reconstruct locs in JS.
+			</li>
+			<li>
+				A <a href="https://github.com/ryanatkn/oxc-bench-formatter" rel="external"
+					>fork of Oxc's official <code>bench-formatter</code></a
+				>
+				is an end-to-end CLI benchmark with its own corpus. On a real TypeScript repo, tsv formats ~{cli_ts_wall_vs_oxfmt}
+				faster than Oxfmt and ~{cli_ts_wall_vs_biome} faster than Biome using
+				{cli_ts_memory ? format_ratio_range(cli_ts_memory.min, cli_ts_memory.max) : '—'} less memory.
+				Wall-clock measurements are warped by each tool's multi-file parallelism, so they scale with core
+				count and are machine-dependent, and could change with tuning.
+			</li>
+		</ul>
+		<p>
+			Each section below has notes that attempt to fairly contextualize its numbers. The charts show
+			numbers using Node v24, and at the end of the page is a <a href="#Cross-runtime"
+				>cross-runtime comparison</a
+			>.
+		</p>
+	</TomeSection>
+
+	<TomeSection>
+		<TomeSectionHeader text="Like Prettier but speedier" />
+		<BenchmarksSummary rows={speedup_rows} />
+	</TomeSection>
+
+	<TomeSection>
+		<TomeSectionHeader text="Format speed" />
+		<p class="mb_xl5">
+			tsv's formatter is similar to <a href="https://oxc.rs/docs/guide/usage/formatter.html"
+				>Oxfmt</a
+			>, <a href="https://biomejs.dev/formatter/">Biome</a>, and
+			<a href="https://dprint.dev/plugins/typescript/">dprint</a>. It formats Svelte, TypeScript,
+			and CSS, plus JS as strict-mode TypeScript:
+		</p>
+		{#each format_groups as group (group.language)}
+			<BenchmarksGroup {group} {corpus} />
+		{/each}
 		<aside class="mt_xl5">
-			<p>Important notes:</p>
+			<p>Notes:</p>
 			<ul>
-				<li>apples-to-apples comparisons are difficult here because of differing scope</li>
-				<li>Biome includes a parser, formatter, and linter supporting many languages</li>
+				<li>wasm-to-wasm and native-to-native (N-API here) are the fair comparisons</li>
 				<li>
-					tsv and tsv_wasm include a parser and formatter for Svelte/HTML, TypeScript/JS, and CSS
+					Oxfmt formats TypeScript, JS, and CSS with its own native engine, and for Svelte it
+					delegates to Prettier internally (via prettier-plugin-svelte).
 				</li>
 				<li>
-					oxc-parser only parses TypeScript and JS, not CSS or HTML; oxfmt is its separate formatter
+					There's no native Biome entry: its native engine ships only as the <code>biome</code> CLI binary,
+					a separate process rather than an embeddable library, so it can't be fairly timed in-process
+					like the others.
 				</li>
-				<li>oxfmt has no wasm build as of June 2026</li>
 				<li>
-					tsv doesn't publish native artifacts yet, but it builds them for benchmarking over FFI
-					with Deno
+					The dprint entry is <a href="https://dprint.dev/plugins/typescript/"
+						>dprint-plugin-typescript</a
+					>, the engine <code>deno fmt</code> runs for TypeScript and JS, loaded in-process as its
+					wasm plugin. It formats TypeScript and JS only — the plugin rejects CSS and Svelte, and
+					dprint's CSS and HTML plugins are separate — so it's grayed out in those two groups. This
+					times the engine, not the <code>deno fmt</code> CLI: a subprocess per file would measure process
+					startup instead of formatting.
 				</li>
 			</ul>
 		</aside>
 	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Speedier than Prettier" />
-		<BenchmarksSummary rows={speedup_rows} {groups} {corpus} />
+		<TomeSectionHeader text="Parse speed" />
+		<p class="mb_xl5">
+			The parse entries that build a full JS AST are comparable in mechanism: tsv and oxc-parser
+			both serialize the AST to JSON in Rust and deserialize it in JS, native and wasm alike. But
+			the deliverables differ — tsv's default wire (<code>tsv-json</code> /
+			<code>tsv_wasm-json</code>) carries a per-node <code>loc</code> (line/column) object that
+			oxc-parser's default span-only AST omits, and that <code>loc</code> is roughly half the wire
+			bytes and most of its JSON.parse cost. The <code>tsv-json-no-locations</code> /
+			<code>tsv_wasm-json-no-locations</code> entries drop it, emitting the same span-only shape oxc does,
+			so those are the payload-matched, apples-to-apples comparison with oxc-parser (line/column stays
+			derivable from the offsets plus source, so nothing is lost). The tsv-internal and tsv_wasm-internal
+			entries build the native AST but skip JS-side materialization, so they show raw in-engine speed
+			rather than a cross-tool comparison.
+		</p>
+		{#each parse_groups as group (group.language)}
+			<BenchmarksGroup {group} {corpus} />
+		{/each}
+		<aside class="mt_xl5">
+			<p>Some notes:</p>
+			<ul>
+				<li>
+					JS parsers skip the Rust-to-JS serialization step that tsv and oxc pay for, which keeps
+					them competitive.
+				</li>
+				<li>
+					Biome is shown grayed-out across all three parse groups because its <code
+						>@biomejs/js-api</code
+					> package doesn't expose a parser to JS (only formatting and linting). Biome parses internally
+					but never surfaces the AST across the JS boundary, so it can't be measured.
+				</li>
+				<li>
+					oxc-parser only parses TypeScript and JS (and JSX, not measured here). oxc-parser doesn't
+					expose a CSS parser, and it doesn't parse Svelte.
+				</li>
+				<li>
+					<code>tsv-json-no-locations</code> / <code>tsv_wasm-json-no-locations</code> are the fair,
+					payload-matched comparison with oxc-parser: they emit tsv's span-only wire (offsets, no
+					per-node <code>loc</code>), matching oxc's default AST shape. The plain
+					<code>tsv-json</code> entries carry the richer <code>loc</code>-bearing drop-in AST that
+					Svelte's compiler consumes for sourcemaps — a strictly larger deliverable, so a slower
+					number that isn't an engine-speed difference.
+				</li>
+				<li>
+					<code>tsv internal (node napi)</code> and <code>tsv_wasm internal</code> aren't a fair comparison
+					to the other entries — they skip JS-side AST materialization entirely, so they're included only
+					to show tsv's own JSON-serialization overhead against its non-internal entry.
+				</li>
+			</ul>
+		</aside>
 	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Format" />
+		<TomeSectionHeader text="Parse conformance" />
 		<p class="mb_xl5">
-			tsv's formatter is similar to <a href="https://oxc.rs/docs/guide/usage/formatter.html"
-				>Oxfmt</a
-			>
-			and <a href="https://biomejs.dev/">Biome</a>. Today it can format Svelte, TypeScript, and CSS,
-			plus HTML and JS (as strict-mode TypeScript):
+			Separate from the speed numbers above that use a real-world corpus of code, this section
+			measures parse <em>coverage</em>: how much of a much larger, deliberately hard corpus each
+			parser accepts — Prettier's format-test suites, Svelte's compiler test suite, CSS extracted
+			from
+			<a href="https://github.com/web-platform-tests/wpt">web-platform-tests</a>, and
+			<a href="https://github.com/tc39/test262">test262</a>'s expected-valid strict-mode tests.
 		</p>
-		{#each format_groups as group (group.language)}
-			<BenchmarksGroup {group} {corpus} />
-		{/each}
+		<BenchmarksConformance groups={conformance_groups} />
 		<aside class="mt_xl5">
-			<p>How to read these numbers:</p>
+			<p>Reading these numbers:</p>
+			<ul>
+				<li>
+					Coverage is per engine, not per binding — a parser accepts the same files whether it runs
+					native or wasm, so each tool appears once.
+				</li>
+				<li>
+					For Svelte, the corpus excludes the files svelte/compiler itself rejects, so its number is
+					100% by construction and the rest read as drop-in fidelity against it — higher is strictly
+					better. For TypeScript and CSS the canonical parser isn't a clean validity oracle
+					(acorn-typescript trails modern syntax, Svelte's CSS parser is lenient), so those suites
+					keep intentionally-invalid and out-of-scope inputs — read them relative to each other, not
+					as an absolute target.
+				</li>
+				<li>
+					Accepting a file says nothing about producing the <em>right</em> AST — tsv's output is separately
+					verified against the canonical parsers (svelte/compiler, acorn-typescript) at corpus scale in
+					its repo's conformance gates.
+				</li>
+			</ul>
+			{#if benchmarks_conformance_json.corpus_sources?.length}
+				<p>Corpus sources ({benchmarks_conformance_json.corpus_sources.length}):</p>
+				<ul>
+					{#each benchmarks_conformance_json.corpus_sources as source (source.path)}
+						{@const url = corpus_source_url(source)}
+						<li>
+							{#if url}
+								<!-- eslint-disable-next-line svelte/no-navigation-without-resolve -->
+								<a href={url} rel="external"><code>{source.path}</code></a>
+							{:else}
+								<code>{source.path}</code>
+							{/if}
+							— {format_corpus_source_files(source)}
+						</li>
+					{/each}
+				</ul>
+			{/if}
+		</aside>
+	</TomeSection>
+
+	<TomeSection>
+		<TomeSectionHeader text="Binary size" />
+		<p>
+			Rather than supporting many languages, tsv focuses on Svelte/HTML, TypeScript/JS, and CSS.
+			This lets it be smaller when it's all you need, a quality that's more relevant when used in
+			the browser via wasm.
+		</p>
+		<BenchmarksSizes sizes={benchmarks_json.binary_sizes} />
+		<aside class="mt_xl5">
+			<p>Important notes:</p>
 			<ul>
+				<li>apples-to-apples comparisons are difficult here because of differing scope</li>
+				<li>oxc-parser only parses TypeScript and JS/JSX; oxfmt is its separate formatter</li>
+				<li>tsv and tsv_wasm include a parser and formatter for Svelte, TypeScript/JS, and CSS</li>
+				<li>
+					Biome bundles a parser, formatter, and linter for many languages, but its native engine
+					ships only as the CLI binary, not an embeddable library, and
+					<code>@biomejs/js-api</code> exposes only formatting and linting. Every native entry here is
+					an in-process library call, so a subprocess CLI isn't a comparable artifact — only Biome's wasm
+					build is included
+				</li>
 				<li>
-					Each tool is timed producing its own formatting, so outputs may differ. Prettier is the
-					reference, and Oxfmt also targets Prettier conformance. tsv tracks Prettier closely but
-					intentionally diverges in some documented cases, and Biome formats to its own style.
+					the <code>oxc-parser + oxfmt</code> entry under Full toolchain sums oxc's separate parser and
+					formatter packages, since together they're the closest equivalent to tsv's single parse+format
+					build
 				</li>
 				<li>
-					Oxfmt only formats TypeScript and JS with its own native engine. For CSS and Svelte it
-					bundles and runs Prettier internally (plus prettier-plugin-svelte for Svelte), so its CSS
-					and Svelte rows essentially re-measure Prettier minus a little wrapper overhead.
+					that combined figure is a little unfair to oxc: oxfmt statically links its own copy of the
+					same oxc parser (it has to parse to format) but doesn't depend on the
+					<code>oxc-parser</code> package or expose parsing through its API. The two are independently
+					compiled, so the sum counts the parser's compiled code twice — more than a single build exposing
+					both operations (like tsv's) would need
 				</li>
 				<li>
-					The Prettier baseline runs in JS while the headline tsv row is the native build, so it's a
-					cross-tier comparison. For an engine-vs-engine read, compare within a runtime tier: wasm
-					vs wasm, or native vs native.
+					oxfmt has no wasm build as of July 2026, so it's shown grayed-out under Formatter, holding
+					its slot beside <code>oxfmt (napi)</code>
 				</li>
 				<li>
-					tsv's CSS coverage is intentionally lower than Prettier's and Biome's - it rejects
-					non-standard non-Svelte CSS (SCSS, LESS, CSS Modules, IE hacks) to stay slim and focused.
-					Full CSS-spec compliance is on the roadmap, including error recovery.
+					tsv doesn't publish native artifacts yet, but it builds them for benchmarking — an N-API
+					addon for Node and Bun, and a C-FFI library for Deno
 				</li>
 			</ul>
 		</aside>
 	</TomeSection>
 
 	<TomeSection>
-		<TomeSectionHeader text="Parse" />
+		<TomeSectionHeader text="End-to-end CLI benchmark" />
 		<p class="mb_xl5">
-			The parse rows that build a full JS AST are directly comparable: tsv and oxc-parser both
-			serialize the AST to JSON in Rust and deserialize it in JS, native and wasm alike. The
-			tsv-internal and tsv_wasm-internal rows are tsv's parse-only numbers - they build the native
-			AST but skip JS-side materialization, so they show raw in-engine speed rather than a
-			cross-tool comparison.
+			The numbers above measure tsv's engine in-process, one file at a time, using tsv's original
+			benchmarks. This section describes the results from a fork of Oxc's official
+			<a href="https://github.com/oxc-project/bench-formatter" rel="external"
+				><code>bench-formatter</code></a
+			>
+			that
+			<a href="https://github.com/ryanatkn/oxc-bench-formatter" rel="external">adds tsv</a>, timing
+			the whole CLI end-to-end — process spawn, file discovery, I/O, and each tool's default
+			multi-file parallelism — plus peak memory. It's the "what you experience typing the command"
+			measure, run on real repositories. tsv appears in the two JSX-free scenarios (it has no
+			JSX/TSX parser).
 		</p>
-		{#each parse_groups as group (group.language)}
-			<BenchmarksGroup {group} {corpus} />
-		{/each}
+		<BenchmarksCli report={benchmarks_cli} />
 		<aside class="mt_xl5">
-			<p>Some notes:</p>
+			<p>How to read these numbers:</p>
 			<ul>
 				<li>
-					JS parsers skip the Rust-to-JS serialization step that tsv and oxc pay for, which keeps
-					them competitive.
+					This measures the whole command, not the engine in isolation. tsv, oxfmt, and biome
+					parallelize across files while prettier is effectively serial, so the wall-clock ratios
+					bake in each tool's parallelism and scale with core count — they're only meaningful
+					alongside the machine they ran on. The <code>vs tsv (CPU work)</code> column is the
+					parallelism-neutral view (total CPU time across threads): on the TypeScript repo tsv is ~{cli_ts_wall_vs_oxfmt}
+					Oxfmt in wall-clock but ~{cli_ts_cpu_vs_oxfmt} in CPU work, the rest being cores Oxfmt uses
+					and Prettier can't.
+				</li>
+				<li>
+					Peak memory doesn't depend on thread count, so it's the most directly comparable figure —
+					tsv uses {cli_memory ? format_ratio_range(cli_memory.min, cli_memory.max) : '—'} less than every
+					other tool across both scenarios.
+				</li>
+				<li>
+					Formatting width isn't identical: prettier, biome, and oxfmt format at width 80 (oxfmt
+					explicitly, the others by default), while tsv is non-configurable at width 100. Different
+					widths mean different line-break work — a real if small asymmetry with no fix on tsv's
+					side.
+				</li>
+				<li>
+					Errors aren't penalized by the harness, but both tsv scenarios run a preflight parse check
+					first and every formatter accepts the whole corpus, so nothing is skipped. tsv is left out
+					of the fork's other three scenarios because they contain JSX/TSX or measure work tsv
+					doesn't do (embedded-language formatting, import and Tailwind-class sorting).
 				</li>
-				<li>Some parts of tsv are not well-optimized yet, particularly parsing CSS.</li>
 			</ul>
 		</aside>
 	</TomeSection>
@@ -152,39 +381,53 @@
 		<TomeSectionHeader text="Benchmarking details" />
 		<p>
 			All numbers are single-threaded: every library formats or parses one file at a time, measured
-			sequentially with no cross-file parallelism. These are per-file, single-core latency and
-			throughput numbers - not the multi-core batch throughput a CLI gets when it formats many files
-			at once, which most of these tools (tsv included) can do.
+			sequentially with no cross-file parallelism. Each row is the total time to process the whole
+			corpus once on a single core — not the multi-core batch throughput a CLI gets when it formats
+			many files at once, which most of these tools (tsv included) can do.
 		</p>
 		<p class="mb_xl3">
-			What's measured: around 5,500 files (~15 MB) of
-			<code>.svelte</code>/<code>.html</code>, <code>.ts</code>/<code>.js</code>, and
-			<code>.css</code>, from three sources: the fuz.dev libraries and apps, upstream framework
-			source (Svelte, SvelteKit, and the svelte.dev site), and formatter conformance fixtures
-			(Prettier's and prettier-plugin-svelte's own test suites - deliberately tricky edge cases, not
-			typical code, so they skew the corpus toward hard cases).
+			What's measured: {corpus_file_count.toLocaleString('en-US')} files of <code>.svelte</code>,
+			<code>.ts</code>/<code>.js</code>, and <code>.css</code> — real-world code only, from two
+			sources: the author's libraries, apps, and sites (the fuz.dev ecosystem plus personal
+			SvelteKit sites), and upstream framework source (Svelte, SvelteKit, and the svelte.dev site).
+			The CSS set also includes real-authored CSS extracted from those components'
+			<code>&lt;style&gt;</code> blocks, concatenated per repo — standalone CSS files are rare in this
+			ecosystem, and the same bytes appear in the Svelte rows (rows are never summed). Test files count
+			as real code and stay in; fixture files (the formatter test suites that used to be part of this
+			corpus, and fixture subtrees inside the measured repos) are excluded — deliberately tricky edge
+			cases measure conformance, not typical throughput, and are covered by the parse-conformance section
+			above.
 		</p>
 		<BenchmarksMeta baseline={benchmarks_json} />
 	</TomeSection>
-</TomeContent>
 
-<style>
-	.legend {
-		display: flex;
-		gap: var(--space_xl);
-		flex-wrap: wrap;
-		font-size: var(--font_size_sm);
-		margin-bottom: var(--space_xl);
-	}
-	.legend span {
-		display: flex;
-		align-items: center;
-		gap: var(--space_xs);
-	}
-	.swatch {
-		display: inline-block;
-		width: 1.6rem;
-		height: 1.6rem;
-		border-radius: var(--border_radius_xs);
-	}
-</style>
+	<TomeSection>
+		<TomeSectionHeader text="Cross-runtime" />
+		<p>
+			The same benchmark harness runs under three JS runtimes — Node, Deno, and Bun. The headline
+			numbers above are the Node run. The native entry differs by runtime: Node and Bun load tsv's
+			N-API addon, while Deno loads its C-FFI library. They share code but cross a different binding
+			boundary, so a per-runtime delta on the same row is a runtime effect — the JS engine or the
+			binding boundary — not a difference in tsv's own engine, which is identical across all three.
+		</p>
+		<aside class="mt_xl5 mb_xl5">
+			<p>Reading the tables:</p>
+			<ul>
+				<li>
+					tsv's native binding boundaries are at parity across runtimes — the
+					<code>tsv-internal</code> rows, which cross the boundary but hand nothing back to
+					materialize, sit within a few percent Node vs Deno. The visible spread is largely confined
+					to the JSON-materializing parse rows, where it reflects each JS engine's
+					<code>JSON.parse</code> cost rather than the N-API-vs-FFI boundary: Deno and Bun edge out Node
+					there. Node is the headline as the default N-API path, not because it's the fastest native number.
+				</li>
+				<li>
+					tsv's own paths — native (N-API/FFI) and wasm — run on all three runtimes. Bun currently
+					fails to load two third-party wasm implementations (biome's wasm-bundler and oxc-parser's
+					wasm32-wasi binding), so they show <code>fail</code> in the Bun column.
+				</li>
+			</ul>
+		</aside>
+		<BenchmarksCrossRuntime report={benchmarks_cross_runtime_json} />
+	</TomeSection>
+</TomeContent>
diff --git a/src/routes/docs/benchmarks/BenchmarksBar.svelte b/src/routes/docs/benchmarks/BenchmarksBar.svelte
index 128c7b5..258add9 100644
--- a/src/routes/docs/benchmarks/BenchmarksBar.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksBar.svelte
@@ -3,7 +3,7 @@
 		category_color,
 		format_label,
 		type FormattedUnit,
-		type ImplementationCategory,
+		type ImplementationCategory
 	} from './benchmark_data.ts';
 
 	const {
@@ -14,6 +14,9 @@
 		ratio_text,
 		ratio_color,
 		annotation,
+		disabled = false,
+		on_enter,
+		on_leave
 	}: {
 		label: string;
 		bar_fraction: number;
@@ -24,48 +27,96 @@
 		// optional extra context shown between value and ratio (corpus coverage in
 		// benchmark groups, gzipped size in binary-size groups); omitted when absent
 		annotation?: string | undefined;
+		// a grayed-out, inert placeholder (a tool that doesn't run in this group) —
+		// no bar, no value, no ratio, just the label held in its shared slot
+		disabled?: boolean;
+		// hover-to-rebaseline: fired when the pointer enters/leaves the row so the
+		// group can adopt this row as its ratio anchor; omitted on inert placeholders
+		on_enter?: (() => void) | undefined;
+		on_leave?: (() => void) | undefined;
 	} = $props();
+
+	// the parenthesized binding suffix (`(wasm)`/`(node napi)`) describes how the
+	// tool actually ran in this (Node) report - meaningless for the disabled
+	// placeholders of single-variant tools (biome and dprint each ship only a wasm
+	// build here, so there's no ambiguity to lose). oxc-parser keeps its suffix even
+	// when disabled since it has two placeholder rows (napi and wasm) that would
+	// otherwise become indistinguishable.
+	const display_label = $derived(
+		disabled && (category === 'biome' || category === 'dprint')
+			? format_label(label).replace(/ \([^)]*\)$/, '')
+			: format_label(label)
+	);
 </script>
 
-<div class="bar-row" class:has-annotation={annotation != null}>
-	<span class="bar-label">{format_label(label)}</span>
+<!-- the hover handlers only re-baseline the group's ratios — a non-essential
+	visual aid over data that's fully visible regardless, with the default anchor
+	serving keyboard and no-hover users — so the row stays presentational -->
+<!-- svelte-ignore a11y_no_static_element_interactions -->
+<div
+	class="bar-row"
+	class:has-annotation={annotation != null}
+	class:disabled
+	onmouseenter={on_enter}
+	onmouseleave={on_leave}
+>
+	<span class="bar-label">{display_label}</span>
 	<div class="bar-track">
-		<div
-			class="bar-fill"
-			style:width="{bar_fraction * 100}%"
-			style:background={category_color(category)}
-		></div>
+		{#if !disabled}
+			<div
+				class="bar-fill"
+				style:width="{bar_fraction * 100}%"
+				style:background={category_color(category)}
+			></div>
+		{/if}
 	</div>
-	<span class="bar-value">{value.value} <span class="text_50">{value.unit}</span></span>
+	<span class="bar-value">
+		{#if disabled}
+			<span class="text_40">n/a</span>
+		{:else}
+			{value.value} <span class="text_50">{value.unit}</span>
+		{/if}
+	</span>
 	{#if annotation != null}
 		<span class="bar-annotation text_50">{annotation}</span>
 	{/if}
-	<span class="bar-ratio" style:color={ratio_color}>{ratio_text}</span>
+	<span class="bar-ratio" style:color={ratio_color}
+		>{#if !disabled}{ratio_text}{/if}</span
+	>
 </div>
 
 <style>
 	.bar-row {
 		display: grid;
-		grid-template-columns: 12rem 1fr 5.6rem 3.4rem;
+		grid-template-columns: 16rem 1fr 5.6rem 3.4rem;
 		align-items: center;
 		gap: var(--space_sm);
-		height: 2rem;
+		/* rows sit flush (no inter-row gap) with a little padding, so the hover
+		 * highlight reads as one contiguous, full-height band per row */
+		padding-block: var(--space_xs);
+		border-radius: var(--border_radius_xs);
 	}
 	.bar-row.has-annotation {
-		grid-template-columns: 12rem 1fr 5.6rem 6rem 3.4rem;
+		grid-template-columns: 16rem 1fr 5.6rem 6rem 3.4rem;
+	}
+	.bar-row.disabled {
+		opacity: 0.6;
+	}
+	/* hovering an enabled row makes it the group's ratio anchor (driven in JS); the
+	 * highlight marks which row every ratio in the group is now measured against */
+	.bar-row:not(.disabled):hover {
+		background-color: var(--fg_10);
 	}
 	.bar-annotation {
 		font-size: var(--font_size_xs);
 		text-align: right;
-		font-variant-numeric: tabular-nums;
 		white-space: nowrap;
 	}
 	.bar-label {
 		font-size: var(--font_size_sm);
 		text-align: right;
-		overflow: hidden;
-		text-overflow: ellipsis;
 		white-space: nowrap;
+		/* these may overflow slightly/harmlessly, just need to visually check */
 	}
 	.bar-track {
 		height: 1.2rem;
@@ -81,7 +132,6 @@
 	.bar-value {
 		font-size: var(--font_size_sm);
 		text-align: right;
-		font-variant-numeric: tabular-nums;
 		white-space: nowrap;
 	}
 	.bar-ratio {
diff --git a/src/routes/docs/benchmarks/BenchmarksBaselineGroup.svelte b/src/routes/docs/benchmarks/BenchmarksBaselineGroup.svelte
new file mode 100644
index 0000000..c2d52da
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksBaselineGroup.svelte
@@ -0,0 +1,50 @@
+<script lang="ts">
+	import {
+		baseline_ratio_color,
+		compute_baseline_ratio,
+		format_baseline_ratio,
+		type BaselineDirection,
+		type BaselineRow
+	} from './benchmark_data.ts';
+	import BenchmarksBar from './BenchmarksBar.svelte';
+
+	const {
+		rows,
+		direction
+	}: {
+		// ordered so the first enabled row is the default baseline (callers lead with
+		// the canonical reference for speed, the smallest build for size)
+		rows: Array<BaselineRow>;
+		direction: BaselineDirection;
+	} = $props();
+
+	// the row currently acting as the baseline: the hovered row while the pointer is
+	// over an enabled row, otherwise the group default (its first enabled row). Each
+	// group instance owns its own state, so the three groups in a section re-baseline
+	// independently.
+	let hovered_key: string | undefined = $state(undefined);
+	const default_anchor_key = $derived(rows.find((r) => !r.disabled)?.key);
+	const anchor_key = $derived(hovered_key ?? default_anchor_key);
+	const anchor_row = $derived(rows.find((r) => r.key === anchor_key));
+</script>
+
+<div class="column">
+	{#each rows as row (row.key)}
+		{@const ratio =
+			!row.disabled && anchor_row && row.key !== anchor_key
+				? compute_baseline_ratio(direction, row.raw, anchor_row.raw)
+				: undefined}
+		<BenchmarksBar
+			label={row.label}
+			bar_fraction={row.bar_fraction}
+			category={row.category}
+			value={row.value}
+			annotation={row.annotation}
+			disabled={row.disabled}
+			ratio_text={ratio != null ? format_baseline_ratio(direction, ratio) : '1.0x'}
+			ratio_color={ratio != null ? baseline_ratio_color(direction, ratio) : 'var(--text_40)'}
+			on_enter={row.disabled ? undefined : () => (hovered_key = row.key)}
+			on_leave={() => (hovered_key = undefined)}
+		/>
+	{/each}
+</div>
diff --git a/src/routes/docs/benchmarks/BenchmarksCli.svelte b/src/routes/docs/benchmarks/BenchmarksCli.svelte
new file mode 100644
index 0000000..277a77d
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksCli.svelte
@@ -0,0 +1,125 @@
+<script lang="ts">
+	import { format_speedup } from './benchmark_data.ts';
+	import type { BenchmarksCliReport, CliScenario, CliFormatterResult } from './benchmarks_cli.ts';
+
+	const {
+		report
+	}: {
+		report: BenchmarksCliReport;
+	} = $props();
+
+	// listed as the harness reported them, so a formatter added or dropped upstream
+	// shows up here instead of silently rendering `undefined` for a fixed key
+	const versions = $derived(
+		Object.entries(report.versions)
+			.map(([name, version]) => `${name} ${version}`)
+			.join(', ')
+	);
+
+	const format_time = (ms: number): string =>
+		ms < 1000 ? `${Math.round(ms)} ms` : `${(ms / 1000).toFixed(1)} s`;
+
+	// tsv is the reference row; every ratio is `other / tsv` (>1 = tsv is that many
+	// times faster / lighter). Returns null for the tsv row itself.
+	interface Row {
+		result: CliFormatterResult;
+		is_tsv: boolean;
+		wall_ratio: number | null;
+		cpu_ratio: number | null;
+		memory_ratio: number | null;
+	}
+	const to_rows = (scenario: CliScenario): Array<Row> => {
+		const tsv = scenario.results.find((r) => r.label === 'tsv');
+		if (!tsv) return [];
+		return scenario.results.map((result) => {
+			const is_tsv = result === tsv;
+			return {
+				result,
+				is_tsv,
+				wall_ratio: is_tsv ? null : result.wall_ms / tsv.wall_ms,
+				cpu_ratio: is_tsv ? null : result.cpu_ms / tsv.cpu_ms,
+				memory_ratio:
+					is_tsv || result.memory_mb == null || tsv.memory_mb == null
+						? null
+						: result.memory_mb / tsv.memory_mb
+			};
+		});
+	};
+</script>
+
+{#each report.scenarios as scenario (scenario.key)}
+	<div class="scenario">
+		<h3>{scenario.heading}</h3>
+		<p>{scenario.description}</p>
+		<div class="table-scroll">
+			<table>
+				<thead>
+					<tr>
+						<th class="formatter">formatter</th>
+						<th>time</th>
+						<th>vs tsv</th>
+						<th>vs tsv (CPU work)</th>
+						<th>peak RSS</th>
+						<th>vs tsv</th>
+					</tr>
+				</thead>
+				<tbody>
+					{#each to_rows(scenario) as row (row.result.label)}
+						<tr class:tsv={row.is_tsv}>
+							<td class="formatter">{row.result.label}</td>
+							<td>{format_time(row.result.wall_ms)}</td>
+							<td class="speedup"
+								>{row.wall_ratio == null ? '—' : format_speedup(row.wall_ratio)}</td
+							>
+							<td class="speedup">{row.cpu_ratio == null ? '—' : format_speedup(row.cpu_ratio)}</td>
+							<td
+								>{row.result.memory_mb == null ? '—' : `${Math.round(row.result.memory_mb)} MB`}</td
+							>
+							<td class="speedup"
+								>{row.memory_ratio == null ? '—' : format_speedup(row.memory_ratio)}</td
+							>
+						</tr>
+					{/each}
+				</tbody>
+			</table>
+		</div>
+	</div>
+{/each}
+
+<p class="versions">
+	Measured on {report.machine} — {versions}. Wall-clock ratios scale with core count; "vs tsv (CPU
+	work)" is the parallelism-neutral view.
+</p>
+
+<style>
+	.scenario {
+		margin-bottom: var(--space_xl2);
+	}
+	/* wide table scrolls in its own container so the page body never scrolls sideways */
+	.table-scroll {
+		overflow-x: auto;
+	}
+	table {
+		width: 100%;
+	}
+	th,
+	td {
+		padding: var(--space_xs) var(--space_sm);
+		text-align: right;
+		white-space: nowrap;
+	}
+	.formatter {
+		text-align: left;
+	}
+	.speedup {
+		font-weight: 600;
+	}
+	tr.tsv {
+		font-weight: 700;
+		background-color: var(--fg_1);
+	}
+	.versions {
+		font-size: var(--font_size_sm);
+		opacity: 0.7;
+	}
+</style>
diff --git a/src/routes/docs/benchmarks/BenchmarksConformance.svelte b/src/routes/docs/benchmarks/BenchmarksConformance.svelte
new file mode 100644
index 0000000..87a21f0
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksConformance.svelte
@@ -0,0 +1,76 @@
+<script lang="ts">
+	import { format_coverage_percent, type ConformanceGroup } from './benchmark_data.ts';
+
+	const {
+		groups
+	}: {
+		groups: Array<ConformanceGroup>;
+	} = $props();
+
+	const LANGUAGE_LABELS: Record<string, string> = {
+		svelte: 'Svelte',
+		typescript: 'TypeScript',
+		css: 'CSS'
+	};
+</script>
+
+{#each groups as group (group.language)}
+	<div class="mb_xl5">
+		<p class="heading">
+			Parsing {group.files_total.toLocaleString('en-US')}
+			{LANGUAGE_LABELS[group.language] ?? group.language} files
+		</p>
+		<table>
+			<thead>
+				<tr>
+					<th></th>
+					<th class="num">files accepted</th>
+					<th class="num">coverage</th>
+				</tr>
+			</thead>
+			<tbody>
+				{#each group.rows as row (row.name)}
+					<tr>
+						<td>{row.name}</td>
+						<td class="num"
+							>{row.files_processed.toLocaleString('en-US')} / {row.files_total.toLocaleString(
+								'en-US'
+							)}</td
+						>
+						<td class="num percent">{format_coverage_percent(row.coverage_fraction)}</td>
+					</tr>
+				{/each}
+			</tbody>
+		</table>
+	</div>
+{/each}
+
+<style>
+	.heading {
+		margin-bottom: var(--space_xs);
+	}
+	table {
+		width: 100%;
+		max-width: 40rem;
+		border-collapse: collapse;
+	}
+	th {
+		font-weight: 400;
+		font-size: var(--font_size_sm);
+		color: var(--text_40);
+		text-align: left;
+		padding-block: var(--space_xs);
+	}
+	td {
+		padding-block: var(--space_xs);
+		border-top: var(--border_width) solid var(--border_color);
+	}
+	.num {
+		text-align: right;
+		white-space: nowrap;
+		font-variant-numeric: tabular-nums;
+	}
+	.percent {
+		font-weight: 700;
+	}
+</style>
diff --git a/src/routes/docs/benchmarks/BenchmarksCrossRuntime.svelte b/src/routes/docs/benchmarks/BenchmarksCrossRuntime.svelte
new file mode 100644
index 0000000..c71ac86
--- /dev/null
+++ b/src/routes/docs/benchmarks/BenchmarksCrossRuntime.svelte
@@ -0,0 +1,146 @@
+<script lang="ts">
+	import {
+		category_color,
+		cross_runtime_ratio_background,
+		derive_cross_runtime_groups,
+		derive_runtime_versions,
+		format_cross_runtime_label,
+		format_speedup,
+		order_cross_runtime_runtimes,
+		type CrossRuntimeReport
+	} from './benchmark_data.ts';
+
+	const {
+		report
+	}: {
+		report: CrossRuntimeReport;
+	} = $props();
+
+	// The node/deno/bun versions the columns were measured under (node-first).
+	const runtime_versions = $derived(derive_runtime_versions(report));
+
+	// Node-first (the flagship N-API runtime), then deno, then bun — the same
+	// display order `derive_cross_runtime_groups` anchors its ratios on.
+	const runtimes = $derived(order_cross_runtime_runtimes(report.runtimes));
+	const base = $derived(runtimes[0]);
+	// ratio columns compare every other runtime against the base (node)
+	const others = $derived(runtimes.filter((r) => r !== base));
+
+	const groups = $derived(derive_cross_runtime_groups(report));
+
+	const format_ops = (n: number | undefined): string => (n == null ? 'fail' : n.toFixed(2));
+
+	const group_label = (operation: string, language: string): string =>
+		`${operation === 'format' ? 'Format' : 'Parse'} ${language}`;
+</script>
+
+<div class="cross-runtime">
+	{#if report.mixed_vintage}
+		<aside class="mixed-vintage">
+			⚠ The per-runtime reports backing these tables come from different commits/versions, so the
+			ratios are unreliable until every runtime is re-run.
+		</aside>
+	{/if}
+	{#if report.mixed_machine}
+		<aside class="mixed-vintage">
+			⚠ The per-runtime reports backing these tables were produced on different hardware, so the
+			ratios are not comparable until every runtime is re-run on one machine.
+		</aside>
+	{/if}
+	{#if runtime_versions.length}
+		<ul class="versions">
+			{#each runtime_versions as { runtime, version } (runtime)}
+				<li><code>{runtime}</code> {version}</li>
+			{/each}
+		</ul>
+	{/if}
+	{#each groups as group (group.group)}
+		<div class="group">
+			<h4 class="mt_0 mb_sm">{group_label(group.operation, group.language)}</h4>
+			<table>
+				<thead>
+					<tr>
+						<th></th>
+						{#each runtimes as runtime (runtime)}
+							<th class="num">{runtime}</th>
+						{/each}
+						{#each others as runtime (runtime)}
+							<th class="num">{runtime}/{base}</th>
+						{/each}
+					</tr>
+				</thead>
+				<tbody>
+					{#each group.rows as row (row.name)}
+						<tr>
+							<td>
+								<i class="swatch" style:background={category_color(row.category)}></i>
+								{format_cross_runtime_label(row.name)}
+							</td>
+							{#each runtimes as runtime (runtime)}
+								<td class="num">{format_ops(row.ops_per_second[runtime])}</td>
+							{/each}
+							{#each others as runtime (runtime)}
+								{@const ratio = row.ratio_vs_base[runtime]}
+								<td
+									class="num ratio"
+									style:background={ratio != null
+										? cross_runtime_ratio_background(ratio)
+										: undefined}
+								>
+									{ratio != null ? format_speedup(ratio) : 'fail'}
+								</td>
+							{/each}
+						</tr>
+					{/each}
+				</tbody>
+			</table>
+		</div>
+	{/each}
+	<p class="text_40">
+		sweeps/sec — one sweep is a full pass over the group's timed file set (higher is faster); ratios
+		are vs <code>{base}</code> (&gt; 1 = faster than {base}). A
+		<code>fail</code> is an implementation that runtime can't load (see notes above). The
+		<code>native</code> rows load each runtime's idiomatic binding of the same engine — the N-API
+		addon under <code>node</code> and <code>bun</code> (<code>tsv (node napi)</code>), the C-FFI
+		library under <code>deno</code> (<code>tsv (deno ffi)</code>) — so the <code>deno</code> column is
+		a first-class FFI-vs-N-API comparison, not a re-run of the same binding.
+	</p>
+</div>
+
+<style>
+	/* the warning red tint over fuz_css's base aside styling */
+	.mixed-vintage {
+		border-left-color: var(--color_c_50);
+	}
+	/* the runtime versions the columns were measured under — a compact horizontal row */
+	.versions {
+		display: flex;
+		flex-wrap: wrap;
+		column-gap: var(--space_lg);
+		row-gap: var(--space_xs);
+		list-style: none;
+		padding: 0;
+		margin-bottom: var(--space_xl3);
+		font-size: var(--font_size_sm);
+		opacity: 0.7;
+	}
+	.group {
+		margin-bottom: var(--space_xl4);
+	}
+	table {
+		width: 100%;
+	}
+	.num {
+		text-align: right;
+	}
+	.ratio {
+		font-weight: 700;
+	}
+	td .swatch {
+		display: inline-block;
+		width: 1.2rem;
+		height: 1.2rem;
+		border-radius: var(--border_radius_xs);
+		vertical-align: middle;
+	}
+</style>
diff --git a/src/routes/docs/benchmarks/BenchmarksGroup.svelte b/src/routes/docs/benchmarks/BenchmarksGroup.svelte
index d3e2cb8..585348d 100644
--- a/src/routes/docs/benchmarks/BenchmarksGroup.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksGroup.svelte
@@ -1,30 +1,33 @@
 <script lang="ts">
-	import {
-		format_coverage,
-		format_ns,
-		format_speedup,
-		speedup_color,
-		type BenchmarkGroup,
-	} from './benchmark_data.ts';
-	import BenchmarksBar from './BenchmarksBar.svelte';
+	import { format_ns, type BaselineRow, type BenchmarkGroup } from './benchmark_data.ts';
+	import BenchmarksBaselineGroup from './BenchmarksBaselineGroup.svelte';
 
 	const {
 		group,
-		corpus,
+		corpus
 	}: {
 		group: BenchmarkGroup;
 		corpus: Record<string, number>;
 	} = $props();
 
-	// coverage annotations only appear on baselines that carry them (version 3+)
-	const has_coverage = $derived(group.entries.some((e) => e.files_total != null));
-
 	const total = $derived(corpus[group.language] ?? 0);
-	// the timed benchmark runs on the per-group intersection (`files_iterated`), a
-	// subset of the discovered corpus; show "<timed> of <total>" when we have it,
-	// falling back to the corpus total on older baselines (< version 4)
-	const count_label = $derived(
-		group.files_iterated != null ? `${group.files_iterated} of ${total}` : `${total}`,
+	// the count of files actually benchmarked (`files_iterated`), falling back to the
+	// corpus total on older baselines (< version 4)
+	const count_label = $derived((group.files_iterated ?? total).toLocaleString('en-US'));
+
+	const rows: Array<BaselineRow> = $derived(
+		group.entries.map((e) => ({
+			key: e.name,
+			label: e.name,
+			category: e.category,
+			bar_fraction: e.bar_fraction,
+			// the whole-sweep mean — total time to process the group's iterated corpus
+			// once, which is also what the ratios derive from via `raw`
+			value: format_ns(e.mean_ns),
+			raw: e.mean_ns,
+			annotation: undefined,
+			disabled: e.disabled ?? false
+		}))
 	);
 </script>
 
@@ -35,25 +38,7 @@
 			{count_label}
 			{group.language} files</span
 		>
-		{#if has_coverage}<span class="text_40" style:text-align="right"
-				>files handled / total &nbsp;&middot;&nbsp; speed</span
-			>{/if}
+		<span class="text_40" style:text-align="right">total time &nbsp;&middot;&nbsp; speed</span>
 	</p>
-	<div class="column gap_xs">
-		{#each group.entries as entry (entry.name)}
-			<BenchmarksBar
-				label={entry.name}
-				bar_fraction={entry.bar_fraction}
-				category={entry.category}
-				value={format_ns(entry.mean_ns)}
-				ratio_text={entry.speedup_vs_canonical != null
-					? format_speedup(entry.speedup_vs_canonical)
-					: '1.0x'}
-				ratio_color={entry.speedup_vs_canonical != null
-					? speedup_color(entry.speedup_vs_canonical)
-					: 'var(--text_40)'}
-				annotation={format_coverage(entry.files_processed, entry.files_total)}
-			/>
-		{/each}
-	</div>
+	<BenchmarksBaselineGroup {rows} direction="speed" />
 </div>
diff --git a/src/routes/docs/benchmarks/BenchmarksMeta.svelte b/src/routes/docs/benchmarks/BenchmarksMeta.svelte
index 596ee77..66eaa65 100644
--- a/src/routes/docs/benchmarks/BenchmarksMeta.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksMeta.svelte
@@ -1,22 +1,24 @@
 <script lang="ts">
-	import {site_context} from '@fuzdev/fuz_ui/site.svelte.ts';
+	import { site_context } from '@fuzdev/fuz_ui/site.svelte.ts';
 
-	import type {BenchmarkBaseline} from './benchmark_data.ts';
+	import { type BenchmarkBaseline, derive_corpus_repos } from './benchmark_data.ts';
 
 	const {
-		baseline,
+		baseline
 	}: {
 		baseline: BenchmarkBaseline;
 	} = $props();
 
 	const site = site_context.get();
 
+	const corpus_repos = $derived(derive_corpus_repos(baseline.corpus_sources));
+
 	const formatted_date = $derived(
 		new Date(baseline.timestamp).toLocaleDateString('en-US', {
 			year: 'numeric',
 			month: 'long',
-			day: 'numeric',
-		}),
+			day: 'numeric'
+		})
 	);
 
 	// GitHub resolves abbreviated SHAs, so the short `git_commit` links directly.
@@ -25,7 +27,7 @@
 
 <div class="meta">
 	<div class="meta-section">
-		<h4 class="mt_0 mb_sm">corpus</h4>
+		<h4 class="mt_0 mb_sm">corpus stats</h4>
 		<ul>
 			{#each Object.entries(baseline.corpus) as [lang, count] (lang)}
 				<li>{lang}: {count} file{count !== 1 ? 's' : ''}</li>
@@ -40,15 +42,27 @@
 			<li>acorn-typescript {baseline.versions.acorn_ts}</li>
 			<li>prettier {baseline.versions.prettier}</li>
 			<li>prettier-plugin-svelte {baseline.versions.prettier_svelte}</li>
-			<li>oxc-parser {baseline.versions.oxc_parser}</li>
-			<li>oxfmt {baseline.versions.oxfmt}</li>
-			<li>biome {baseline.versions.biome}</li>
+			{#if baseline.versions.oxc_parser}
+				<li>oxc-parser {baseline.versions.oxc_parser}</li>
+			{/if}
+			{#if baseline.versions.oxfmt}
+				<li>oxfmt {baseline.versions.oxfmt}</li>
+			{/if}
+			{#if baseline.versions.biome}
+				<li>biome {baseline.versions.biome}</li>
+			{/if}
+			{#if baseline.versions.dprint}
+				<li>dprint {baseline.versions.dprint}</li>
+			{/if}
 		</ul>
 	</div>
 	<div class="meta-section">
 		<h4 class="mt_0 mb_sm">run</h4>
 		<ul>
 			<li>{formatted_date}</li>
+			{#if baseline.runtime}
+				<li>runtime: {baseline.runtime}</li>
+			{/if}
 			{#if baseline.versions.tsv}
 				<li>tsv {baseline.versions.tsv}</li>
 			{/if}
@@ -58,6 +72,33 @@
 			</li>
 		</ul>
 	</div>
+	{#if baseline.machine}
+		<div class="meta-section">
+			<h4 class="mt_0 mb_sm">environment</h4>
+			<ul>
+				<li>{baseline.machine.cpu_model}</li>
+				<li>{baseline.machine.os}/{baseline.machine.arch}</li>
+				{#if baseline.runtime}
+					<li>{baseline.runtime} {baseline.machine.runtime_version}</li>
+				{:else}
+					<li>{baseline.machine.runtime_version}</li>
+				{/if}
+			</ul>
+		</div>
+	{/if}
+	{#if corpus_repos.length}
+		<div class="meta-section corpus-repos">
+			<h4 class="mt_0 mb_sm">corpus repos</h4>
+			<ul class="repos">
+				{#each corpus_repos as repo (repo.url)}
+					<li>
+						<!-- eslint-disable-next-line svelte/no-navigation-without-resolve -->
+						<a href={repo.url}>{repo.label}</a>
+					</li>
+				{/each}
+			</ul>
+		</div>
+	{/if}
 </div>
 
 <style>
@@ -73,4 +114,14 @@
 		padding: 0;
 		margin: 0;
 	}
+	/* the repos list spans its own row below the compact stat columns and wraps horizontally */
+	.corpus-repos {
+		flex-basis: 100%;
+	}
+	.repos {
+		display: flex;
+		flex-wrap: wrap;
+		column-gap: var(--space_lg);
+		row-gap: var(--space_xs);
+	}
 </style>
diff --git a/src/routes/docs/benchmarks/BenchmarksSizes.svelte b/src/routes/docs/benchmarks/BenchmarksSizes.svelte
index ad9df5f..577625d 100644
--- a/src/routes/docs/benchmarks/BenchmarksSizes.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksSizes.svelte
@@ -2,83 +2,54 @@
 	import {
 		format_bytes,
 		format_gzip_size,
-		categorize_size,
-		size_ratio_color,
-		type BinarySize,
+		derive_size_groups,
+		type BaselineRow,
+		type BinarySize
 	} from './benchmark_data.ts';
-	import BenchmarksBar from './BenchmarksBar.svelte';
+	import BenchmarksBaselineGroup from './BenchmarksBaselineGroup.svelte';
 
 	const {
-		sizes,
+		sizes
 	}: {
 		sizes: Array<BinarySize>;
 	} = $props();
 
-	const wasm_sizes = $derived(sizes.filter((s) => s.kind === 'wasm'));
-	const native_sizes = $derived(sizes.filter((s) => s.kind === 'native'));
+	// grouped by capability (full toolchain / formatter / parser) so each build
+	// sits beside its closest competitor; wasm and native mix within a group
+	const size_groups = $derived(derive_size_groups(sizes));
 
-	const make_display = (items: Array<BinarySize>) => {
-		const sorted = items.toSorted((a, b) => a.bytes - b.bytes);
-		const max = Math.max(0, ...items.map((s) => s.bytes));
-		// anchor "vs tsv" ratios on the headline build per kind - `tsv_wasm` (the
-		// flagship full build the bench executes) for wasm, `tsv (native)` for native —
-		// matching the report.md table; `tsv_format_wasm` covers reports generated
-		// before shape v2 added the third build, then any tsv-prefixed label.
-		// Without this the wasm group anchors on whatever sorts largest and every
-		// ratio disagrees with the report.
-		const tsv =
-			sorted.find((s) => s.label === 'tsv_wasm' || s.label === 'tsv (native)') ??
-			sorted.find((s) => s.label === 'tsv_format_wasm') ??
-			sorted.find((s) => s.label.startsWith('tsv'));
-		return sorted.map((s) => ({
-			...s,
-			bar_fraction: max > 0 ? s.bytes / max : 0,
-			ratio_vs_tsv: tsv && s !== tsv ? s.bytes / tsv.bytes : undefined,
-			category: categorize_size(s.label),
+	// a disabled placeholder (e.g. oxfmt's absent wasm build) has no gzip size of its
+	// own; when its group's other entries do carry one, fall back to 'n/a' rather than
+	// omitting the annotation entirely - otherwise that row drops the annotation
+	// column and its bar-track renders wider than its siblings'
+	const has_gzip = (entries: ReadonlyArray<{ gzip_bytes: number | null }>) =>
+		entries.some((e) => e.gzip_bytes != null);
+
+	const to_rows = (group: (typeof size_groups)[number]): Array<BaselineRow> => {
+		const group_has_gzip = has_gzip(group.entries);
+		return group.entries.map((s) => ({
+			key: s.label,
+			label: s.label,
+			category: s.category,
+			bar_fraction: s.bar_fraction,
+			value: format_bytes(s.bytes),
+			raw: s.bytes,
+			annotation: s.disabled
+				? group_has_gzip
+					? 'n/a'
+					: undefined
+				: format_gzip_size(s.gzip_bytes),
+			disabled: s.disabled ?? false
 		}));
 	};
-
-	const wasm_display = $derived(make_display(wasm_sizes));
-	const native_display = $derived(make_display(native_sizes));
 </script>
 
-{#if wasm_display.length > 0}
-	<div class="size-group">
-		<h3>wasm</h3>
-		<div class="column gap_xs">
-			{#each wasm_display as s (s.label)}
-				<BenchmarksBar
-					label={s.label}
-					bar_fraction={s.bar_fraction}
-					category={s.category}
-					value={format_bytes(s.bytes)}
-					ratio_text={s.ratio_vs_tsv != null ? `${s.ratio_vs_tsv.toFixed(1)}x` : '1.0x'}
-					ratio_color={s.ratio_vs_tsv != null ? size_ratio_color(s.ratio_vs_tsv) : 'var(--text_40)'}
-					annotation={format_gzip_size(s.gzip_bytes)}
-				/>
-			{/each}
-		</div>
-	</div>
-{/if}
-
-{#if native_display.length > 0}
+{#each size_groups as group (group.capability)}
 	<div class="size-group">
-		<h3>native</h3>
-		<div class="column gap_xs">
-			{#each native_display as s (s.label)}
-				<BenchmarksBar
-					label={s.label}
-					bar_fraction={s.bar_fraction}
-					category={s.category}
-					value={format_bytes(s.bytes)}
-					ratio_text={s.ratio_vs_tsv != null ? `${s.ratio_vs_tsv.toFixed(1)}x` : '1.0x'}
-					ratio_color={s.ratio_vs_tsv != null ? size_ratio_color(s.ratio_vs_tsv) : 'var(--text_40)'}
-					annotation={format_gzip_size(s.gzip_bytes)}
-				/>
-			{/each}
-		</div>
+		<h3>{group.heading}</h3>
+		<BenchmarksBaselineGroup rows={to_rows(group)} direction="size" />
 	</div>
-{/if}
+{/each}
 
 <style>
 	.size-group {
diff --git a/src/routes/docs/benchmarks/BenchmarksSummary.svelte b/src/routes/docs/benchmarks/BenchmarksSummary.svelte
index af3b40e..503752c 100644
--- a/src/routes/docs/benchmarks/BenchmarksSummary.svelte
+++ b/src/routes/docs/benchmarks/BenchmarksSummary.svelte
@@ -1,40 +1,27 @@
 <script lang="ts">
-	import {format_speedup, type BenchmarkGroup, type SpeedupRow} from './benchmark_data.ts';
+	import { format_speedup, type SpeedupRow } from './benchmark_data.ts';
 
 	const {
-		rows,
-		groups,
-		corpus,
+		rows
 	}: {
 		rows: Array<SpeedupRow>;
-		groups: Array<BenchmarkGroup>;
-		corpus: Record<string, number>;
 	} = $props();
-
-	// the speedups are measured on the per-group intersection (`files_iterated`),
-	// not the full discovered corpus — label the columns with the timed set,
-	// falling back to the corpus total on older baselines (< version 4)
-	const count_label = (language: string): string => {
-		const group = groups.find((g) => g.operation === 'format' && g.language === language);
-		const total = corpus[language] ?? 0;
-		return group?.files_iterated != null ? `${group.files_iterated} of ${total}` : `${total}`;
-	};
 </script>
 
 <p>
-	tsv is heavily inspired by and borrows architectural patterns from <a href="https://prettier.io/"
-		>Prettier</a
-	>. We're very grateful for the hard work of its
-	<a href="https://github.com/prettier/prettier/graphs/contributors">contributors</a>. tsv offers a
-	speedup over Prettier:
+	tsv's formatter is inspired by and borrows architectural patterns from <a
+		href="https://prettier.io/">Prettier</a
+	>, and we're grateful for the hard work of its
+	<a href="https://github.com/prettier/prettier/graphs/contributors">contributors</a>.
+	Single-threaded on the benchmarked corpus, tsv is this much faster than Prettier:
 </p>
 <table>
 	<thead>
 		<tr>
 			<th></th>
-			<th class="color_h_50">Svelte<br /><small>{count_label('svelte')} files</small></th>
-			<th class="color_i_50">TypeScript<br /><small>{count_label('typescript')} files</small></th>
-			<th class="color_a_50">CSS<br /><small>{count_label('css')} files</small></th>
+			<th class="color_h_50">Svelte</th>
+			<th class="color_i_50">TypeScript</th>
+			<th class="color_a_50">CSS</th>
 		</tr>
 	</thead>
 	<tbody>
@@ -56,11 +43,6 @@
 	}
 	thead th {
 		padding: var(--space_xs) var(--space_sm);
-		font-size: var(--font_size_sm);
-	}
-	thead th small {
-		font-weight: 400;
-		opacity: 0.7;
 	}
 	tbody td {
 		padding: var(--space_xs) var(--space_sm);
@@ -72,6 +54,5 @@
 	.speedup {
 		font-size: var(--font_size_xl);
 		font-weight: 700;
-		font-variant-numeric: tabular-nums;
 	}
 </style>
diff --git a/src/routes/docs/benchmarks/benchmark_data.ts b/src/routes/docs/benchmarks/benchmark_data.ts
index 9bf0958..4add8af 100644
--- a/src/routes/docs/benchmarks/benchmark_data.ts
+++ b/src/routes/docs/benchmarks/benchmark_data.ts
@@ -1,7 +1,12 @@
-// Raw types matching the tsv bench.ts `Baseline` format
+// Raw types matching the tsv bench's per-runtime report format
+// (`benches/js/results/report.<runtime>.json` — the site's flagship detailed
+// view is the Node report, the N-API native path)
 
 export interface BenchmarkBaseline {
 	version: number;
+	// The runtime that produced this report (`node` for the flagship view).
+	// Present from report `version` 5 on.
+	runtime?: string;
 	timestamp: string;
 	git_commit: string;
 	corpus: Record<string, number>;
@@ -11,23 +16,91 @@ export interface BenchmarkBaseline {
 	// Counts of silenced third-party stderr noise, keyed by message pattern.
 	// Present from baseline `version` 4 on; not rendered, kept for parity.
 	suppressed_noise?: Record<string, number>;
+	// Which corpus/surface produced the report: `perf` (real-world corpus,
+	// format + parse) or `conformance` (the deliberately-hard fixture suites,
+	// disjoint from the perf corpus, parse only). Present from `version` 6 on.
+	corpus_kind?: 'perf' | 'conformance';
+	// Per-entry corpus composition (path + loaded file count) — discloses which
+	// sources were present on the machine that produced the report. Present
+	// from `version` 6 on.
+	corpus_sources?: Array<CorpusSource>;
+	// The machine that produced the report — CPU model, OS/arch, runtime version.
+	// The throughput numbers are machine-relative, so this is the environment the
+	// meta panel discloses. Present from `version` 7 on (absent on older reports).
+	machine?: Machine;
 }
 
+// The hardware/runtime a report was measured on. Excludes hostname (the reports
+// are published) and volatile fields (free memory, load) that would churn.
+export interface Machine {
+	cpu_model: string;
+	os: string;
+	arch: string;
+	// The producing runtime's own version (`node`/`deno`/`bun` version string).
+	runtime_version: string;
+}
+
+export interface CorpusSource {
+	path: string;
+	files: number;
+	// Per-language split of `files` (svelte/typescript/css counts summing to
+	// `files`). Present on reports whose loader emitted it; older reports carry
+	// only the `files` total, so treat it as optional.
+	by_language?: Partial<Record<string, number>>;
+	// The source's GitHub origin, git-detected by the bench at report-build time
+	// (URL + commit + subpath). Present from `version` 8 on; absent on older
+	// reports and on sources with no GitHub remote — treat as optional.
+	repo?: CorpusRepoRef;
+}
+
+// A corpus source's GitHub origin — see `CorpusSource.repo` and `corpus_source_url`.
+export interface CorpusRepoRef {
+	// Canonical https GitHub URL, e.g. `https://github.com/sveltejs/svelte`.
+	url: string;
+	// `owner/name` (e.g. `sveltejs/svelte`) — a compact label.
+	slug: string;
+	// The commit the corpus was loaded at (full SHA); `''` for a harvested cache
+	// linked at its canonical upstream root (no pin).
+	commit: string;
+	// Path within the repo to this source (`''` = repo root).
+	subpath: string;
+}
+
+/**
+ * The GitHub URL for a corpus source, pinned to the measured commit + subpath
+ * (`…/tree/<commit>/<subpath>`) when detected, or the repo root for a
+ * canonical-upstream cache (empty `commit`). `undefined` when the source has no
+ * detected origin (older reports, or the local `svelte_styles` cache).
+ */
+export const corpus_source_url = (source: CorpusSource): string | undefined => {
+	const repo = source.repo;
+	if (!repo) return undefined;
+	if (!repo.commit) return repo.url;
+	return repo.subpath
+		? `${repo.url}/tree/${repo.commit}/${repo.subpath}`
+		: `${repo.url}/tree/${repo.commit}`;
+};
+
 export interface BaselineEntry {
 	name: string;
 	group: string;
-	mean_ns: number;
-	p50_ns: number;
-	p75_ns: number;
-	p90_ns: number;
-	p95_ns: number;
-	p99_ns: number;
-	min_ns: number;
-	max_ns: number;
-	std_dev_ns: number;
-	cv: number;
-	ops_per_second: number;
-	sample_size: number;
+	// Timing stats are `null` on a coverage-only report (the conformance surface
+	// the site refreshes from — parse coverage measured, timed phase skipped). A
+	// perf report always carries real numbers, and only the perf path
+	// (`derive_benchmark_groups`) reads these, so the nulls are unreachable there
+	// but must be expressed for the shared cast to stay sound.
+	mean_ns: number | null;
+	p50_ns: number | null;
+	p75_ns: number | null;
+	p90_ns: number | null;
+	p95_ns: number | null;
+	p99_ns: number | null;
+	min_ns: number | null;
+	max_ns: number | null;
+	std_dev_ns: number | null;
+	cv: number | null;
+	ops_per_second: number | null;
+	sample_size: number | null;
 	// Per-implementation preflight coverage: files this impl processed / the
 	// language's total discovered files. Present from baseline `version` 3 on;
 	// absent (or `null`) in older baselines.
@@ -36,6 +109,9 @@ export interface BaselineEntry {
 	// Files this impl was actually timed on (the per-group intersection in
 	// default mode). Present from baseline `version` 4 on.
 	files_iterated?: number | null;
+	// Present from report `version` 5 on (matches the report's top-level);
+	// not rendered, kept for parity.
+	runtime?: string;
 }
 
 export interface BaselineVersions {
@@ -48,6 +124,9 @@ export interface BaselineVersions {
 	oxc_parser?: string;
 	oxfmt?: string;
 	biome?: string;
+	// `@dprint/typescript` — the plugin version (the host `@dprint/formatter` is
+	// just the Wasm loader). Absent on reports produced before the dprint row.
+	dprint?: string;
 }
 
 export interface BinarySize {
@@ -68,6 +147,7 @@ export type ImplementationCategory =
 	| 'tsv_wasm'
 	| 'tsv_wasm_json'
 	| 'biome'
+	| 'dprint'
 	| 'oxc';
 
 export interface BenchmarkGroup {
@@ -84,10 +164,14 @@ export interface BenchmarkDisplayEntry {
 	name: string;
 	mean_ns: number;
 	bar_fraction: number;
-	speedup_vs_canonical: number | undefined;
 	category: ImplementationCategory;
 	files_processed: number | null;
 	files_total: number | null;
+	// A placeholder entry mirrored from another language's group for a tool that
+	// doesn't run in this one (e.g. `oxc-parser` under svelte/css parse) — rendered
+	// grayed-out and inert so the parse groups share one entry order. Absent on real,
+	// measured entries.
+	disabled?: boolean;
 }
 
 export interface SpeedupRow {
@@ -105,35 +189,29 @@ const CATEGORY_BY_NAME: Record<string, ImplementationCategory> = {
 	'acorn-typescript': 'canonical',
 	tsv: 'tsv_native',
 	'tsv-json': 'tsv_native_json',
+	'tsv-json-no-locations': 'tsv_native_json',
 	'tsv-internal': 'tsv_native',
 	tsv_wasm: 'tsv_wasm',
 	'tsv_wasm-json': 'tsv_wasm_json',
+	'tsv_wasm-json-no-locations': 'tsv_wasm_json',
 	'tsv_wasm-internal': 'tsv_wasm',
 	'biome-wasm': 'biome',
+	'dprint-wasm': 'dprint',
 	'oxc-parser': 'oxc',
 	'oxc-parser-wasm': 'oxc',
-	oxfmt: 'oxc',
+	oxfmt: 'oxc'
 };
 
-const categorize_name = (name: string): ImplementationCategory => CATEGORY_BY_NAME[name] ?? 'oxc';
+export const categorize_name = (name: string): ImplementationCategory =>
+	CATEGORY_BY_NAME[name] ?? 'oxc';
 
 export const categorize_size = (label: string): ImplementationCategory => {
 	// covers `tsv_wasm` plus the `tsv_format_wasm`/`tsv_parse_wasm` subsets
 	if (label.startsWith('tsv') && label.includes('wasm')) return 'tsv_wasm';
 	if (label.startsWith('tsv')) return 'tsv_native';
 	if (label.startsWith('biome')) return 'biome';
-	if (label.includes('oxc') || label.includes('oxfmt')) return 'oxc';
-	return 'oxc';
-};
-
-// Canonical entry names per group
-const CANONICAL_BY_GROUP: Record<string, string> = {
-	'parse/svelte': 'svelte/compiler',
-	'parse/typescript': 'acorn-typescript',
-	'parse/css': 'svelte/compiler',
-	'format/svelte': 'prettier',
-	'format/typescript': 'prettier',
-	'format/css': 'prettier',
+	if (label.startsWith('dprint')) return 'dprint';
+	return 'oxc'; // oxc-parser / oxfmt, and any unrecognized label
 };
 
 // Primary tsv entry names for speedup summary (fair comparisons)
@@ -142,6 +220,48 @@ const PRIMARY_WASM_FORMAT = 'tsv_wasm';
 
 // Derivation functions
 
+// Shared display order for benchmark groups: format before parse, then by
+// language — used by the detailed, conformance, and cross-runtime views alike.
+const OPERATION_ORDER: Record<string, number> = { format: 0, parse: 1 };
+const LANGUAGE_ORDER: Record<string, number> = {
+	svelte: 0,
+	typescript: 1,
+	css: 2
+};
+
+/**
+ * Fixed slot for a format/parse row, applied in place of a size-ordered sort so the
+ * rows read in a stable, meaningful sequence across every group: the canonical
+ * reference first (the default 1.0x anchor), then the cross-tool comparisons
+ * (alphabetically: biome, dprint, then oxc), then tsv's JSON-materializing wires (the
+ * span-only `no-locations` wire before the default `loc`-carrying one), then tsv's raw
+ * internal engine.
+ */
+const speed_entry_rank = (entry: BenchmarkDisplayEntry): number => {
+	if (entry.category === 'canonical') return 0;
+	if (entry.category === 'biome') return 1;
+	if (entry.category === 'dprint') return 2;
+	if (entry.category === 'oxc') return 3;
+	if (entry.name.endsWith('-no-locations')) return 4; // tsv json, span-only wire
+	if (entry.name.endsWith('-json')) return 5; // tsv json, loc-carrying wire
+	return 6; // tsv-internal / tsv_wasm-internal — raw in-engine, no JS materialization
+};
+
+/**
+ * Orders format/parse rows by their fixed `speed_entry_rank` slot, then wasm before
+ * native within a tier (the browser-relevant build leads each pairing), then by name
+ * — shared by the initial sort and the re-sort after disabled placeholders are mixed
+ * in, so every group scans identically.
+ */
+const compare_speed_entries = (a: BenchmarkDisplayEntry, b: BenchmarkDisplayEntry): number => {
+	const rank = speed_entry_rank(a) - speed_entry_rank(b);
+	if (rank !== 0) return rank;
+	// wasm before native within a tier
+	const kind = (a.name.includes('wasm') ? 0 : 1) - (b.name.includes('wasm') ? 0 : 1);
+	if (kind !== 0) return kind;
+	return a.name.localeCompare(b.name);
+};
+
 export const derive_benchmark_groups = (baseline: BenchmarkBaseline): Array<BenchmarkGroup> => {
 	const grouped: Map<string, Array<BaselineEntry>> = new Map();
 	for (const entry of baseline.entries) {
@@ -159,29 +279,27 @@ export const derive_benchmark_groups = (baseline: BenchmarkBaseline): Array<Benc
 		const parts = group_key.split('/');
 		const operation = parts[0]!;
 		const language = parts[1]!;
-		const canonical_name = CANONICAL_BY_GROUP[group_key];
-		const canonical_entry_raw = entries.find((e) => e.name === canonical_name);
-		const slowest = Math.max(...entries.map((e) => e.mean_ns));
+		// The sort below leads each group with its canonical reference (Prettier for
+		// format, the JS baseline for parse), so the first row is the default 1.0x
+		// anchor; the shared component reads that default off the first row and
+		// recomputes every ratio, re-baselining onto whichever row is hovered. (Size
+		// groups lead with their smallest build; see `derive_size_groups`.)
+		// `?? 0` coerces the coverage-only null (unreachable on a perf report, the
+		// only kind this runs on) so the display entry's `mean_ns` stays a number.
+		const slowest = Math.max(...entries.map((e) => e.mean_ns ?? 0));
 
 		const display_entries: Array<BenchmarkDisplayEntry> = entries.map((e) => ({
 			name: e.name,
-			mean_ns: e.mean_ns,
-			bar_fraction: slowest > 0 ? e.mean_ns / slowest : 0,
-			speedup_vs_canonical:
-				canonical_entry_raw && e.name !== canonical_name
-					? canonical_entry_raw.mean_ns / e.mean_ns
-					: undefined,
+			mean_ns: e.mean_ns ?? 0,
+			bar_fraction: slowest > 0 ? (e.mean_ns ?? 0) / slowest : 0,
 			category: categorize_name(e.name),
 			files_processed: e.files_processed ?? null,
-			files_total: e.files_total ?? null,
+			files_total: e.files_total ?? null
 		}));
 
-		// Sort: canonical first, then by mean_ns descending (slowest first for visual)
-		display_entries.sort((a, b) => {
-			if (a.category === 'canonical' && b.category !== 'canonical') return -1;
-			if (b.category === 'canonical' && a.category !== 'canonical') return 1;
-			return b.mean_ns - a.mean_ns;
-		});
+		// Fixed order (see `compare_speed_entries`): canonical leads as the default 1.0x
+		// anchor, then biome, oxc, tsv's json wires, then tsv's internal engine
+		display_entries.sort(compare_speed_entries);
 
 		const iterated_counts = entries
 			.map((e) => e.files_iterated)
@@ -191,27 +309,166 @@ export const derive_benchmark_groups = (baseline: BenchmarkBaseline): Array<Benc
 			language,
 			entries: display_entries,
 			canonical_entry: display_entries.find((e) => e.category === 'canonical'),
-			files_iterated: iterated_counts.length > 0 ? Math.max(...iterated_counts) : null,
+			files_iterated: iterated_counts.length > 0 ? Math.max(...iterated_counts) : null
 		});
 	}
 
-	// Sort groups: format before parse, then by language
-	const LANG_ORDER: Record<string, number> = {svelte: 0, typescript: 1, css: 2};
-	const OP_ORDER: Record<string, number> = {format: 0, parse: 1};
 	result.sort(
 		(a, b) =>
-			(OP_ORDER[a.operation] ?? 9) - (OP_ORDER[b.operation] ?? 9) ||
-			(LANG_ORDER[a.language] ?? 9) - (LANG_ORDER[b.language] ?? 9),
+			(OPERATION_ORDER[a.operation] ?? 9) - (OPERATION_ORDER[b.operation] ?? 9) ||
+			(LANGUAGE_ORDER[a.language] ?? 9) - (LANGUAGE_ORDER[b.language] ?? 9)
 	);
 
+	// Neither `biome` nor (for svelte/css) `oxc-parser` has a real entry in every
+	// parse group. `biome`'s `@biomejs/js-api` never exposes a parser to JS at all
+	// (only formatting and linting), so no parse group has a real biome entry;
+	// `oxc-parser` only parses TypeScript/JS, so the svelte and css parse groups
+	// lack it. Mirror both in as disabled placeholders — biome always, oxc-parser
+	// only where it's missing — then re-sort so they fall into their fixed slots
+	// (biome then oxc, right after the canonical row), giving all three parse groups
+	// one shared entry order.
+	const ts_parse = result.find((g) => g.operation === 'parse' && g.language === 'typescript');
+	const oxc_templates = ts_parse?.entries.filter((e) => e.category === 'oxc') ?? [];
+	for (const group of result) {
+		if (group.operation !== 'parse') continue;
+		const biome_placeholder: BenchmarkDisplayEntry = {
+			name: 'biome-wasm',
+			mean_ns: 0,
+			bar_fraction: 0,
+			category: 'biome',
+			files_processed: null,
+			files_total: null,
+			disabled: true
+		};
+		const needs_oxc =
+			group.language !== 'typescript' && !group.entries.some((e) => e.category === 'oxc');
+		const oxc_placeholders: Array<BenchmarkDisplayEntry> = needs_oxc
+			? oxc_templates.map((e) => ({
+					...e,
+					bar_fraction: 0,
+					files_processed: null,
+					files_total: null,
+					disabled: true
+				}))
+			: [];
+		group.entries.push(biome_placeholder, ...oxc_placeholders);
+		group.entries.sort(compare_speed_entries);
+	}
+
+	// The format-side analogue: `dprint` formats TypeScript/JS only — its
+	// `@dprint/typescript` plugin rejects CSS and Svelte outright (dprint's CSS and
+	// HTML plugins are separate Wasm plugins the bench doesn't load) — so the svelte
+	// and css FORMAT groups have no real dprint entry. Mirror it in as a disabled
+	// placeholder so all three format groups share one entry order, exactly as
+	// oxc-parser is mirrored into the svelte/css parse groups above. Guarded on the
+	// template existing, so a report predating the dprint row renders unchanged.
+	const ts_format = result.find((g) => g.operation === 'format' && g.language === 'typescript');
+	const dprint_templates = ts_format?.entries.filter((e) => e.category === 'dprint') ?? [];
+	if (dprint_templates.length > 0) {
+		for (const group of result) {
+			if (group.operation !== 'format') continue;
+			if (group.entries.some((e) => e.category === 'dprint')) continue;
+			group.entries.push(
+				...dprint_templates.map((e) => ({
+					...e,
+					bar_fraction: 0,
+					files_processed: null,
+					files_total: null,
+					disabled: true
+				}))
+			);
+			group.entries.sort(compare_speed_entries);
+		}
+	}
+
+	return result;
+};
+
+// Parse-conformance coverage (the conformance report's headline metric)
+
+export interface ConformanceRow {
+	name: string;
+	files_processed: number;
+	files_total: number;
+	// files_processed / files_total, rendered as the coverage percentage
+	coverage_fraction: number;
+}
+
+export interface ConformanceGroup {
+	language: string;
+	// the language's total discovered files (every row shares it)
+	files_total: number;
+	rows: Array<ConformanceRow>;
+}
+
+/**
+ * One coverage row per ENGINE, not per binding: the conformance headline is
+ * "which files does this parser accept," which is identical across a tool's
+ * native/wasm/internal variants — so the `-wasm` and `-internal` duplicates
+ * are dropped and `tsv-json` stands in for tsv (relabeled plainly, since the
+ * JSON-materialization qualifier is a speed concern, not a coverage one).
+ */
+const CONFORMANCE_ENGINE_NAMES: Record<string, string> = {
+	'svelte/compiler': 'svelte/compiler',
+	'acorn-typescript': 'acorn-typescript',
+	'tsv-json': 'tsv',
+	'oxc-parser': 'oxc-parser'
+};
+
+/**
+ * Derives per-language parse-coverage groups from a conformance report
+ * (`corpus_kind: 'conformance'` — parse groups only). Rows are ordered by coverage,
+ * highest first; entries without coverage data are dropped.
+ */
+export const derive_conformance_groups = (baseline: BenchmarkBaseline): Array<ConformanceGroup> => {
+	const by_language: Map<string, Array<ConformanceRow>> = new Map();
+	for (const entry of baseline.entries) {
+		const [operation, language] = entry.group.split('/');
+		if (operation !== 'parse' || !language) continue;
+		const display_name = CONFORMANCE_ENGINE_NAMES[entry.name];
+		if (!display_name) continue;
+		if (entry.files_processed == null || entry.files_total == null) continue;
+		let rows = by_language.get(language);
+		if (!rows) {
+			rows = [];
+			by_language.set(language, rows);
+		}
+		rows.push({
+			name: display_name,
+			files_processed: entry.files_processed,
+			files_total: entry.files_total,
+			coverage_fraction: entry.files_total > 0 ? entry.files_processed / entry.files_total : 0
+		});
+	}
+
+	const result: Array<ConformanceGroup> = [];
+	for (const [language, rows] of by_language) {
+		// coverage descending (highest acceptance first), name as a stable tiebreak
+		rows.sort((a, b) => b.coverage_fraction - a.coverage_fraction || a.name.localeCompare(b.name));
+		result.push({
+			language,
+			files_total: Math.max(0, ...rows.map((r) => r.files_total)),
+			rows
+		});
+	}
+	result.sort((a, b) => (LANGUAGE_ORDER[a.language] ?? 9) - (LANGUAGE_ORDER[b.language] ?? 9));
 	return result;
 };
 
+/**
+ * Formats a coverage fraction as a percentage with two decimals (`99.85%`),
+ * FLOORED rather than rounded — rounding would render e.g. 44219/44220 as
+ * `100.00%` next to a visibly non-total count. Only exact totality reads 100%
+ * (matching the harness's own `coverage_pct` convention in tsv's report.ts).
+ */
+export const format_coverage_percent = (fraction: number): string =>
+	`${(Math.floor(fraction * 10_000) / 100).toFixed(2)}%`;
+
 export const derive_speedup_summary = (groups: Array<BenchmarkGroup>): Array<SpeedupRow> => {
 	const find_speedup = (
 		operation: string,
 		language: string,
-		primary_name: string,
+		primary_name: string
 	): number | undefined => {
 		const group = groups.find((g) => g.operation === operation && g.language === language);
 		if (!group?.canonical_entry) return undefined;
@@ -225,17 +482,277 @@ export const derive_speedup_summary = (groups: Array<BenchmarkGroup>): Array<Spe
 			variant: 'native',
 			format_svelte: find_speedup('format', 'svelte', PRIMARY_NATIVE_FORMAT),
 			format_typescript: find_speedup('format', 'typescript', PRIMARY_NATIVE_FORMAT),
-			format_css: find_speedup('format', 'css', PRIMARY_NATIVE_FORMAT),
+			format_css: find_speedup('format', 'css', PRIMARY_NATIVE_FORMAT)
 		},
 		{
 			variant: 'wasm',
 			format_svelte: find_speedup('format', 'svelte', PRIMARY_WASM_FORMAT),
 			format_typescript: find_speedup('format', 'typescript', PRIMARY_WASM_FORMAT),
-			format_css: find_speedup('format', 'css', PRIMARY_WASM_FORMAT),
-		},
+			format_css: find_speedup('format', 'css', PRIMARY_WASM_FORMAT)
+		}
 	];
 };
 
+// Binary-size grouping by capability
+
+/** What a build actually does, used to group binary sizes for like-for-like comparison. */
+export type SizeCapability = 'full' | 'formatter' | 'parser';
+
+/**
+ * Buckets a binary-size label by capability so each build lands next to its
+ * closest competitor: `parser` (tsv's parse-only build, `oxc-parser`),
+ * `formatter` (tsv's format-only build, `oxfmt`), else `full` (the flagship
+ * parse+format builds, `biome`, and the combined `oxc-parser + oxfmt` entry).
+ */
+export const categorize_size_capability = (label: string): SizeCapability => {
+	const has_parse = label.includes('parse');
+	const has_format = label.includes('format') || label.includes('fmt');
+	// a build that does both is a full toolchain (e.g. the combined oxc-parser + oxfmt entry)
+	if (has_parse && has_format) return 'full';
+	if (has_parse) return 'parser'; // tsv parse (ffi), tsv_parse_wasm, oxc-parser
+	if (has_format) return 'formatter'; // tsv format, oxfmt
+	return 'full'; // tsv (napi/ffi), tsv_wasm, biome
+};
+
+export interface SizeDisplayEntry extends BinarySize {
+	bar_fraction: number;
+	category: ImplementationCategory;
+	// a grayed-out, inert placeholder for a build that doesn't exist (e.g. oxfmt's
+	// absent wasm build) — no bar, no size, just the label held in its slot. Absent
+	// on real, measured entries.
+	disabled?: boolean;
+}
+
+export interface SizeCapabilityGroup {
+	capability: SizeCapability;
+	heading: string;
+	// sorted smallest-first, so the leading entry is the default ratio anchor (1.0x)
+	entries: Array<SizeDisplayEntry>;
+}
+
+const SIZE_CAPABILITY_ORDER: ReadonlyArray<{
+	capability: SizeCapability;
+	heading: string;
+}> = [
+	{ capability: 'full', heading: 'Full toolchain (parse + format)' },
+	{ capability: 'formatter', heading: 'Formatter' },
+	{ capability: 'parser', heading: 'Parser' }
+];
+
+/** Display label for the synthesized combined oxc full-toolchain build. */
+export const OXC_FULL_LABEL = 'oxc-parser + oxfmt (napi)';
+
+/** Display label for oxfmt's absent wasm build placeholder — see `derive_size_groups`. */
+export const OXFMT_WASM_LABEL = 'oxfmt (wasm)';
+
+/**
+ * Synthesizes oxc's full-toolchain native build by summing its separately-shipped
+ * parser (`oxc-parser (napi)`) and formatter (`oxfmt (napi)`) packages — together
+ * they're the closest equivalent to tsv's single parse+format build, so the entry
+ * stands beside `tsv (napi)` in the full-toolchain group. Returns `undefined` when
+ * either half is missing (older baselines), and sums gzip only when both carry it.
+ */
+const synthesize_oxc_full = (sizes: Array<BinarySize>): BinarySize | undefined => {
+	const parser = sizes.find((s) => s.label === 'oxc-parser (napi)');
+	const formatter = sizes.find((s) => s.label === 'oxfmt (napi)');
+	if (!parser || !formatter) return undefined;
+	return {
+		label: OXC_FULL_LABEL,
+		bytes: parser.bytes + formatter.bytes,
+		kind: 'native',
+		gzip_bytes:
+			parser.gzip_bytes != null && formatter.gzip_bytes != null
+				? parser.gzip_bytes + formatter.gzip_bytes
+				: null
+	};
+};
+
+/**
+ * Groups the binary sizes by capability (full / formatter / parser), each group
+ * mixing wasm and native builds sorted smallest-first. Bars scale to the group's
+ * largest build; the `vs` ratio anchors on the group's single smallest build, so
+ * exactly one entry reads 1.0x and every other is a multiple of it. (In the current
+ * data that smallest build is always one of tsv's, so tsv reads 1.0x and the heavier
+ * competitors read >1.0x.) A combined `oxc-parser + oxfmt` entry is
+ * synthesized into the full-toolchain group, since oxc ships parse and format apart.
+ * oxfmt has no wasm build, so the formatter group gets a disabled `oxfmt (wasm)`
+ * placeholder slotted just above its real `oxfmt (napi)` entry, holding the slot
+ * rather than omitting it.
+ */
+export const derive_size_groups = (sizes: Array<BinarySize>): Array<SizeCapabilityGroup> => {
+	const oxc_full = synthesize_oxc_full(sizes);
+	const all_sizes = oxc_full ? [...sizes, oxc_full] : sizes;
+	const groups: Array<SizeCapabilityGroup> = [];
+	for (const { capability, heading } of SIZE_CAPABILITY_ORDER) {
+		const items = all_sizes.filter((s) => categorize_size_capability(s.label) === capability);
+		if (items.length === 0) continue;
+		const sorted = items.toSorted((a, b) => a.bytes - b.bytes);
+		const max = Math.max(0, ...items.map((s) => s.bytes));
+		// `sorted` is ascending, so the smallest build leads the group — its single
+		// default ratio anchor (1.0x), one baseline whether or not the group mixes wasm
+		// and native (rather than the confusing pair a per-kind anchor produced). The
+		// shared component reads every ratio from that leading row.
+		const entries: Array<SizeDisplayEntry> = sorted.map((s) => ({
+			...s,
+			bar_fraction: max > 0 ? s.bytes / max : 0,
+			category: categorize_size(s.label)
+		}));
+		if (capability === 'formatter' && !entries.some((e) => e.label === OXFMT_WASM_LABEL)) {
+			const native_index = entries.findIndex((e) => e.label === 'oxfmt (napi)');
+			const placeholder: SizeDisplayEntry = {
+				label: OXFMT_WASM_LABEL,
+				bytes: 0,
+				kind: 'wasm',
+				gzip_bytes: null,
+				bar_fraction: 0,
+				category: categorize_size(OXFMT_WASM_LABEL),
+				disabled: true
+			};
+			entries.splice(native_index === -1 ? entries.length : native_index, 0, placeholder);
+		}
+		groups.push({ capability, heading, entries });
+	}
+	return groups;
+};
+
+// Cross-runtime combined report (the bench composer's `report.json`, `kind: 'combined'`)
+
+export type BenchmarkRuntime = 'deno' | 'node' | 'bun';
+
+export interface CrossRuntimeRow {
+	group: string;
+	name: string;
+	ops_per_second: Partial<Record<BenchmarkRuntime, number>>;
+	mean_ns: Partial<Record<BenchmarkRuntime, number>>;
+	files_iterated: Partial<Record<BenchmarkRuntime, number | null>>;
+}
+
+export interface CrossRuntimeReport {
+	version: number;
+	kind: 'combined';
+	generated: string;
+	runtimes: Array<BenchmarkRuntime>;
+	// The sibling reports came from different commits/versions — ratios are
+	// unreliable until every runtime is re-run. Present from combined
+	// `version` 6 on.
+	mixed_vintage?: boolean;
+	// The sibling reports were produced on different hardware — ratios are not
+	// comparable. Present from combined `version` 7 on.
+	mixed_machine?: boolean;
+	sources: Array<{
+		runtime: BenchmarkRuntime;
+		timestamp: string;
+		git_commit: string | null;
+		tsv: string | null;
+		// The producing box's machine block; present from combined `version` 7 on.
+		machine?: Machine | null;
+	}>;
+	rows: Array<CrossRuntimeRow>;
+}
+
+export interface CrossRuntimeDisplayRow {
+	name: string;
+	category: ImplementationCategory;
+	ops_per_second: Partial<Record<BenchmarkRuntime, number>>;
+	// ratio of each runtime vs the base (first present) runtime; `> 1` = faster
+	ratio_vs_base: Partial<Record<BenchmarkRuntime, number>>;
+}
+
+export interface CrossRuntimeGroup {
+	group: string;
+	operation: string;
+	language: string;
+	rows: Array<CrossRuntimeDisplayRow>;
+}
+
+// The combined report stores runtimes deno-first (matching the bench's
+// `report.md`); the site presents them node-first (the flagship N-API runtime),
+// then deno, then bun.
+const CROSS_RUNTIME_DISPLAY_ORDER: Array<BenchmarkRuntime> = ['node', 'deno', 'bun'];
+
+/**
+ * The report's runtimes in the site's display order — node (the flagship, the
+ * ratio anchor) first, then deno, then bun. Shared by `derive_cross_runtime_groups`
+ * and the table headers so the anchor can't drift between them.
+ */
+export const order_cross_runtime_runtimes = (
+	runtimes: Array<BenchmarkRuntime>
+): Array<BenchmarkRuntime> => CROSS_RUNTIME_DISPLAY_ORDER.filter((r) => runtimes.includes(r));
+
+/** One runtime's own version string (`node 24.14.1`), for the cross-runtime section. */
+export interface RuntimeVersion {
+	runtime: BenchmarkRuntime;
+	version: string;
+}
+
+/**
+ * The per-runtime version strings from a cross-runtime report, in the site's
+ * display order (node first). Drops any runtime whose source carries no machine
+ * block (reports predating combined `version` 7). The cross-runtime section
+ * renders these so the three-runtime tables disclose which node/deno/bun version
+ * each column was measured under; the environment panel above stays scoped to the
+ * flagship Node baseline. The shared hardware identity (CPU/OS/arch) isn't
+ * repeated here — it lives in the environment panel, and a per-runtime hardware
+ * mismatch is the report's `mixed_machine` flag's concern.
+ */
+export const derive_runtime_versions = (report: CrossRuntimeReport): Array<RuntimeVersion> => {
+	const by_runtime = new Map(report.sources.map((source) => [source.runtime, source]));
+	const result: Array<RuntimeVersion> = [];
+	for (const runtime of order_cross_runtime_runtimes(report.runtimes)) {
+		const version = by_runtime.get(runtime)?.machine?.runtime_version;
+		if (version) result.push({ runtime, version });
+	}
+	return result;
+};
+
+/**
+ * Groups the combined report's rows by benchmark group, in the same display
+ * order as `derive_benchmark_groups` (format before parse, then svelte /
+ * typescript / css). The ratio base is the first runtime in display order
+ * (node when present — the flagship N-API path), regardless of the report's
+ * own deno-first storage order.
+ */
+export const derive_cross_runtime_groups = (
+	report: CrossRuntimeReport
+): Array<CrossRuntimeGroup> => {
+	const runtimes = order_cross_runtime_runtimes(report.runtimes);
+	const base = runtimes[0];
+	const grouped: Map<string, Array<CrossRuntimeDisplayRow>> = new Map();
+	for (const row of report.rows) {
+		let rows = grouped.get(row.group);
+		if (!rows) {
+			rows = [];
+			grouped.set(row.group, rows);
+		}
+		const base_ops = base ? row.ops_per_second[base] : undefined;
+		const ratio_vs_base: Partial<Record<BenchmarkRuntime, number>> = {};
+		for (const runtime of runtimes) {
+			const ops = row.ops_per_second[runtime];
+			if (ops != null && base_ops != null && base_ops > 0) {
+				ratio_vs_base[runtime] = ops / base_ops;
+			}
+		}
+		rows.push({
+			name: row.name,
+			category: categorize_name(row.name),
+			ops_per_second: row.ops_per_second,
+			ratio_vs_base
+		});
+	}
+
+	const result: Array<CrossRuntimeGroup> = [];
+	for (const [group, rows] of grouped) {
+		const [operation, language] = group.split('/');
+		result.push({ group, operation: operation!, language: language!, rows });
+	}
+	result.sort(
+		(a, b) =>
+			(OPERATION_ORDER[a.operation] ?? 9) - (OPERATION_ORDER[b.operation] ?? 9) ||
+			(LANGUAGE_ORDER[a.language] ?? 9) - (LANGUAGE_ORDER[b.language] ?? 9)
+	);
+	return result;
+};
+
 // Formatting utilities
 
 export interface FormattedUnit {
@@ -244,32 +761,109 @@ export interface FormattedUnit {
 }
 
 export const format_ns = (ns: number): FormattedUnit => {
-	if (ns < 1_000) return {value: `${Math.round(ns)}`, unit: 'ns'};
+	if (ns < 1_000) return { value: `${Math.round(ns)}`, unit: 'ns' };
 	if (ns < 1_000_000)
 		return {
 			value: (ns / 1_000).toFixed(ns < 10_000 ? 2 : ns < 100_000 ? 1 : 0),
-			unit: 'µs',
+			unit: 'µs'
 		};
 	const ms = Math.round(ns / 1_000_000);
-	return {value: ms.toLocaleString('en-US'), unit: 'ms'};
+	return { value: ms.toLocaleString('en-US'), unit: 'ms' };
 };
 
 export const format_bytes = (bytes: number): FormattedUnit => {
-	if (bytes < 1_024) return {value: `${bytes}`, unit: 'B'};
-	if (bytes < 1_048_576) return {value: (bytes / 1_024).toFixed(0), unit: 'KB'};
-	return {value: (bytes / 1_048_576).toFixed(1), unit: 'MB'};
+	if (bytes < 1_024) return { value: `${bytes}`, unit: 'B' };
+	if (bytes < 1_048_576) return { value: (bytes / 1_024).toFixed(0), unit: 'KB' };
+	return { value: (bytes / 1_048_576).toFixed(1), unit: 'MB' };
+};
+
+/**
+ * Formats a corpus source's file count as a per-language breakdown
+ * (`124 typescript, 15 svelte, 31 css`), largest language first and dropping
+ * zero-count languages. Falls back to the plain `N files` total when the report
+ * predates the per-language split (or lists no recognized language).
+ */
+export const format_corpus_source_files = (source: CorpusSource): string => {
+	const total = `${source.files.toLocaleString('en-US')} files`;
+	if (!source.by_language) return total;
+	const parts = Object.entries(source.by_language)
+		.filter((entry): entry is [string, number] => (entry[1] ?? 0) > 0)
+		.sort((a, b) => b[1] - a[1])
+		.map(([language, count]) => `${count.toLocaleString('en-US')} ${language}`);
+	return parts.length > 0 ? parts.join(', ') : total;
 };
 
+// Corpus source repos (site-owned path → URL mapping)
+
+export interface CorpusRepo {
+	// public repo URL the entry links to
+	url: string;
+	// `org/name`, derived from the URL — the linkified display label
+	label: string;
+}
+
+/**
+ * Maps a corpus source's on-disk path to its public repo URL. The bench records
+ * only local paths (`../zzz/src`), so the site owns this mapping — the links then
+ * survive an `update-benchmarks` refresh without touching the copied JSON. Keyed by
+ * the repo's directory prefix, each ending in a slash so siblings like `../fuz_css/`
+ * and `../fuz_code/`, and `../svelte/` vs `../svelte.dev/`, stay distinct. A source
+ * matching no prefix — the derived `svelte_styles` CSS cache, which isn't a single
+ * repo — is dropped from the repos list rather than shown unlinked.
+ */
+const CORPUS_REPO_URL_BY_PREFIX: ReadonlyArray<readonly [string, string]> = [
+	['../zzz/', 'https://github.com/fuzdev/zzz'],
+	['../fuz_app/', 'https://github.com/fuzdev/fuz_app'],
+	['../fuz_blog/', 'https://github.com/fuzdev/fuz_blog'],
+	['../fuz_code/', 'https://github.com/fuzdev/fuz_code'],
+	['../fuz_css/', 'https://github.com/fuzdev/fuz_css'],
+	['../fuz_docs/', 'https://github.com/fuzdev/fuz_docs'],
+	['../fuz_gitops/', 'https://github.com/fuzdev/fuz_gitops'],
+	['../fuz_mastodon/', 'https://github.com/fuzdev/fuz_mastodon'],
+	['../fuz_template/', 'https://github.com/fuzdev/fuz_template'],
+	['../fuz_ui/', 'https://github.com/fuzdev/fuz_ui'],
+	['../fuz_util/', 'https://github.com/fuzdev/fuz_util'],
+	['../mdz/', 'https://github.com/fuzdev/mdz'],
+	['../gro/', 'https://github.com/fuzdev/gro'],
+	['../svelte-docinfo/', 'https://github.com/fuzdev/svelte-docinfo'],
+	['../tsv.fuz.dev/', 'https://github.com/fuzdev/tsv.fuz.dev'],
+	['../ryanatkn.com/', 'https://github.com/ryanatkn/ryanatkn.com'],
+	['../webdevladder.net/', 'https://github.com/ryanatkn/webdevladder.net'],
+	['../kit/', 'https://github.com/sveltejs/kit'],
+	['../svelte.dev/', 'https://github.com/sveltejs/svelte.dev'],
+	['../svelte/', 'https://github.com/sveltejs/svelte']
+];
+
+/** The repo URL for a corpus source path, or `undefined` when it maps to no repo. */
+const corpus_repo_url = (path: string): string | undefined =>
+	CORPUS_REPO_URL_BY_PREFIX.find(([prefix]) => path.startsWith(prefix))?.[1];
+
+/** `org/name` from a `https://github.com/org/name` URL — the linkified label. */
+const corpus_repo_label = (url: string): string => new URL(url).pathname.slice(1);
+
 /**
- * Formats per-implementation corpus coverage as `processed/total`, or
- * `undefined` when either value is missing (older baselines without coverage).
+ * The distinct source repos behind a report's corpus, one entry per URL in
+ * first-seen order (the author's ecosystem leads, the upstream framework repos
+ * trail, matching the source order). Sources sharing a repo (svelte.dev's several
+ * packages) collapse to one entry; sources with no mapped repo (the `svelte_styles`
+ * CSS cache) are dropped. URLs come from the site-owned `CORPUS_REPO_URL_BY_PREFIX`,
+ * not the report, so the links survive a refresh.
  */
-export const format_coverage = (
-	processed: number | null | undefined,
-	total: number | null | undefined,
-): string | undefined => {
-	if (processed == null || total == null) return undefined;
-	return `${processed}/${total}`;
+export const derive_corpus_repos = (
+	sources: Array<CorpusSource> | undefined
+): Array<CorpusRepo> => {
+	const by_url: Map<string, CorpusRepo> = new Map();
+	for (const source of sources ?? []) {
+		// Prefer the report's git-detected repo; fall back to the legacy prefix
+		// map for reports predating `version` 8 (which lack `source.repo`).
+		const url = source.repo?.url ?? corpus_repo_url(source.path);
+		if (!url || by_url.has(url)) continue;
+		by_url.set(url, {
+			url,
+			label: source.repo?.slug ?? corpus_repo_label(url)
+		});
+	}
+	return [...by_url.values()];
 };
 
 /**
@@ -279,7 +873,7 @@ export const format_coverage = (
  */
 export const format_gzip_size = (gzip_bytes: number | null | undefined): string | undefined => {
 	if (gzip_bytes == null) return undefined;
-	const {value, unit} = format_bytes(gzip_bytes);
+	const { value, unit } = format_bytes(gzip_bytes);
 	return `${value} ${unit} gz`;
 };
 
@@ -287,10 +881,92 @@ export const format_gzip_size = (gzip_bytes: number | null | undefined): string
 export const format_speedup = (ratio: number): string =>
 	ratio >= 10 ? `${ratio.toFixed(1)}x` : `${ratio.toFixed(2)}x`;
 
+/**
+ * Loose ratio formatting for prose, which reads better with fewer digits than a
+ * table column (`1.7x`, `26x`) — always paired with a `~` in the copy. Renders
+ * `—` for a missing ratio rather than throwing mid-sentence; the benchmark tests
+ * assert every ratio the page quotes actually resolves.
+ */
+export const format_ratio_approx = (ratio: number | undefined): string =>
+	ratio === undefined ? '—' : ratio >= 10 ? `${Math.round(ratio)}x` : `${ratio.toFixed(1)}x`;
+
+/**
+ * An inclusive ratio range for prose (`3–9x`), FLOORED at both ends so a
+ * "3–9x less memory" claim never overstates either bound.
+ */
+export const format_ratio_range = (min: number, max: number): string =>
+	`${Math.floor(min)}–${Math.floor(max)}x`;
+
+/**
+ * How many times faster `faster` is than `slower` within one `operation/language`
+ * group, by mean time — the ratio the prose summaries quote.
+ *
+ * @returns the ratio, or `undefined` when either entry is absent from the report
+ */
+export const benchmark_speedup = (
+	baseline: BenchmarkBaseline,
+	group: string,
+	slower: string,
+	faster: string
+): number | undefined => {
+	const find = (name: string) => baseline.entries.find((e) => e.group === group && e.name === name);
+	// a coverage-only report carries null timings, so both sides must be real
+	const a = find(slower)?.mean_ns;
+	const b = find(faster)?.mean_ns;
+	if (a == null || !b) return undefined;
+	return a / b;
+};
+
+/**
+ * Signed speedup: entries at or above the anchor read as a plain multiple
+ * (`2.50x`), while slower entries show the reciprocal negated (`0.15x` → `-6.67x`)
+ * so "how many times slower" is directly legible instead of a fraction the reader
+ * has to invert. The minus is a convention for "times slower", not a literal
+ * negative rate. Used for the format/parse speed bars, where entries span widely
+ * on both sides of the anchor; the near-parity cross-runtime table and the
+ * bigger-is-worse size ratios stay on the plain fractional `format_speedup`.
+ */
+export const format_speedup_signed = (ratio: number): string => {
+	const magnitude = ratio >= 1 ? ratio : 1 / ratio;
+	const digits = magnitude >= 10 ? 1 : 2;
+	return `${ratio < 1 ? '-' : ''}${magnitude.toFixed(digits)}x`;
+};
+
 /** Hyphenated tool names that should preserve their hyphens in display labels. */
 const HYPHENATED_NAMES = ['acorn-typescript', 'oxc-parser'];
 
+/**
+ * Display labels for the raw benchmark entry names in the main (Node) tables,
+ * annotating each with the runtime **and** binding it runs under — the native
+ * builds load the N-API addon under Node, so they read `(node napi)` to
+ * distinguish them from the Deno FFI numbers the cross-runtime table surfaces
+ * (`tsv (deno ffi)`); the third-party wasm builds are marked `(wasm)`. Mirrors
+ * the parenthesized suffixes the binary-size section's labels already carry.
+ * tsv's own wasm entries keep their `tsv_wasm` package-name style, as in the size
+ * groups, so they aren't listed here. The already-parenthesized size labels
+ * aren't keys, so they fall through to the generic formatting below unchanged.
+ * The cross-runtime table neutralizes the `(node napi)` suffix per row (its
+ * columns span runtimes) via `format_cross_runtime_label`.
+ */
+const LABEL_OVERRIDES: Record<string, string> = {
+	tsv: 'tsv (node napi)',
+	'tsv-json': 'tsv json (node napi)',
+	// `no-locs` (not `no-locations`) — the full word eats too much column width.
+	'tsv-json-no-locations': 'tsv json no-locs (node napi)',
+	// the one tsv_wasm entry listed here: the generic formatting below would
+	// break the `no-locs` hyphen its native sibling deliberately keeps
+	'tsv_wasm-json-no-locations': 'tsv_wasm json no-locs',
+	'tsv-internal': 'tsv internal (node napi)',
+	'oxc-parser': 'oxc-parser (node napi)',
+	oxfmt: 'oxfmt (node napi)',
+	'biome-wasm': 'biome (wasm)',
+	'dprint-wasm': 'dprint (wasm)',
+	'oxc-parser-wasm': 'oxc-parser (wasm)'
+};
+
 export const format_label = (name: string): string => {
+	const override = LABEL_OVERRIDES[name];
+	if (override) return override;
 	for (const tool of HYPHENATED_NAMES) {
 		if (name.startsWith(tool)) {
 			return tool + name.slice(tool.length).replaceAll('-', ' ');
@@ -299,6 +975,16 @@ export const format_label = (name: string): string => {
 	return name.replaceAll('-', ' ');
 };
 
+/**
+ * The label for a cross-runtime row. Each row spans node/deno/bun columns, and a
+ * native build's binding is runtime-specific (N-API on node & bun, C-FFI on
+ * deno), so the row can't pin one binding — neutralize `format_label`'s
+ * node-centric `(node napi)` suffix to `(native)`. The per-runtime binding is
+ * disclosed once in the table caption instead (see `BenchmarksCrossRuntime`).
+ */
+export const format_cross_runtime_label = (name: string): string =>
+	format_label(name).replace(' (node napi)', ' (native)');
+
 /** Returns a CSS background color variable for a category. */
 export const category_color = (category: ImplementationCategory): string => {
 	switch (category) {
@@ -314,16 +1000,24 @@ export const category_color = (category: ImplementationCategory): string => {
 			return 'var(--color_f_40)';
 		case 'biome':
 			return 'var(--color_a_40)';
+		case 'dprint':
+			return 'var(--color_b_40)';
 		case 'oxc':
 			return 'var(--color_i_40)';
 	}
 };
 
-/** Returns a CSS color variable for a size ratio (inverted — bigger is worse). */
+/**
+ * Returns a CSS color variable for a size ratio (inverted — bigger is worse).
+ * Green is reserved for builds smaller than the baseline (ratio < 1, only reachable
+ * once a hover re-baselines onto a larger build); any build at or above the baseline
+ * reads yellow at the floor, ramping through orange to red as it grows.
+ */
 export const size_ratio_color = (ratio: number): string => {
-	if (ratio < 2) return 'var(--color_b_50)'; // green — similar
-	if (ratio < 5) return 'var(--color_e_50)'; // yellow — notably larger
-	return 'var(--color_c_50)'; // red — much larger
+	if (ratio < 1) return 'var(--color_b_50)'; // green — smaller than baseline
+	if (ratio < 3) return 'var(--color_e_50)'; // yellow — larger
+	if (ratio < 10) return 'var(--color_h_50)'; // orange — much larger
+	return 'var(--color_c_50)'; // red — enormous
 };
 
 /** Returns a CSS color variable for the speedup ratio. */
@@ -334,3 +1028,73 @@ export const speedup_color = (ratio: number): string => {
 	if (ratio < 5) return 'var(--color_b_50)'; // green — fast
 	return 'var(--color_j_50)'; // teal — exceptional
 };
+
+/**
+ * Cross-runtime ratio cell background: a stable fuz_css red (`color_c`) / green
+ * (`color_b`) whose ALPHA varies with distance from parity. Fully transparent at ratio
+ * `1.0` (parity recedes), ramping to `0.3` alpha at ratio `0.8` and below (red) or `1.2`
+ * and above (green). The hue stays constant — only opacity moves — so it reads
+ * consistently in light and dark themes while the cell's text keeps the default color.
+ * Deliberately its own scale — NOT the shared `speedup_color` — because cross-runtime
+ * deltas cluster tightly near 1.0 and this must not bleed into the other displays.
+ */
+export const cross_runtime_ratio_background = (ratio: number): string => {
+	// 0 alpha at ratio 1.0, up to 0.3 at ratio ≤ 0.8 (red) or ≥ 1.2 (green)
+	const alpha = Math.min(1, Math.abs(ratio - 1) / 0.2) * 0.3;
+	const color = ratio < 1 ? 'var(--color_c_50)' : 'var(--color_b_50)';
+	return `color-mix(in srgb, ${color} ${(alpha * 100).toFixed(1)}%, transparent)`;
+};
+
+// Interactive baseline (hover-to-rebaseline)
+
+/**
+ * Which way a group's ratio runs, so re-anchoring on hover stays consistent. A
+ * `speed` group (format/parse) reads its anchor as a reference speed — faster
+ * entries are positive multiples, slower ones negative (`format_speedup_signed` /
+ * `speedup_color`). A `size` group reads its anchor as a reference size — bigger
+ * builds are multiples ≥ 1 (`format_size_ratio` / `size_ratio_color`). The two
+ * ratios are reciprocals, which is exactly why one direction flag suffices.
+ */
+export type BaselineDirection = 'speed' | 'size';
+
+/** An entry's ratio against its group's anchor, in the group's direction. */
+export const compute_baseline_ratio = (
+	direction: BaselineDirection,
+	entry_raw: number,
+	anchor_raw: number
+): number => (direction === 'speed' ? anchor_raw / entry_raw : entry_raw / anchor_raw);
+
+/** Plain size ratio (`2.3x`) — its own formatter since sizes never take the signed treatment. */
+export const format_size_ratio = (ratio: number): string => `${ratio.toFixed(1)}x`;
+
+/** Formats a baseline ratio for display in the given direction. */
+export const format_baseline_ratio = (direction: BaselineDirection, ratio: number): string =>
+	direction === 'speed' ? format_speedup_signed(ratio) : format_size_ratio(ratio);
+
+/** Color for a baseline ratio in the given direction. */
+export const baseline_ratio_color = (direction: BaselineDirection, ratio: number): string =>
+	direction === 'speed' ? speedup_color(ratio) : size_ratio_color(ratio);
+
+/**
+ * A normalized row for `BenchmarksBaselineGroup` — the shared hover-to-rebaseline
+ * column behind the format, parse, and binary-size groups. `raw` is the number the
+ * ratio derives from (sweep mean ns for speed, bytes for size); `value` is the
+ * row's displayed measurement (the whole-sweep mean — total time over the group's
+ * iterated corpus — for speed, bytes for size). Flattening the group-specific
+ * display entries to this one shape lets a single component own the anchor state
+ * for all three sections.
+ */
+export interface BaselineRow {
+	// stable identity for `#each` and anchor matching (the entry name / size label)
+	key: string;
+	// raw name/label; `BenchmarksBar` formats it for display
+	label: string;
+	category: ImplementationCategory;
+	bar_fraction: number;
+	value: FormattedUnit;
+	// the number the ratio derives from — mean ns (speed) or bytes (size)
+	raw: number;
+	annotation: string | undefined;
+	// grayed-out, inert placeholder — never an anchor, no hover highlight
+	disabled: boolean;
+}
diff --git a/src/routes/docs/benchmarks/benchmarks.json b/src/routes/docs/benchmarks/benchmarks.json
index bf56417..171cc7a 100644
--- a/src/routes/docs/benchmarks/benchmarks.json
+++ b/src/routes/docs/benchmarks/benchmarks.json
@@ -1,685 +1,1189 @@
 {
-	"version": 4,
-	"timestamp": "2026-06-12T09:22:00.588Z",
-	"git_commit": "98918f9",
+	"version": 7,
+	"runtime": "node",
+	"corpus_kind": "perf",
+	"timestamp": "2026-07-22T09:18:34.995Z",
+	"git_commit": "d063479a",
+	"machine": {
+		"cpu_model": "AMD Ryzen 5 PRO 7530U with Radeon Graphics",
+		"os": "linux",
+		"arch": "x86_64",
+		"runtime_version": "24.14.1"
+	},
 	"corpus": {
-		"svelte": 1240,
-		"typescript": 4025,
-		"css": 193
+		"svelte": 767,
+		"typescript": 2448,
+		"css": 50
 	},
+	"corpus_sources": [
+		{
+			"path": "../zzz/src",
+			"files": 326,
+			"by_language": {
+				"svelte": 173,
+				"typescript": 152,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/zzz",
+				"slug": "fuzdev/zzz",
+				"commit": "838d499c7cc746ebe1f5da8470e7679c8895aee0",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_app/src",
+			"files": 665,
+			"by_language": {
+				"svelte": 33,
+				"typescript": 631,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_app",
+				"slug": "fuzdev/fuz_app",
+				"commit": "4f012eae9ff11e5a1fb7a4faacf640ea9b63607a",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_blog/src",
+			"files": 37,
+			"by_language": {
+				"svelte": 20,
+				"typescript": 16,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_blog",
+				"slug": "fuzdev/fuz_blog",
+				"commit": "ecc86884c6e1ebe31d1f492e5df631cb8e586273",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_code/src",
+			"files": 74,
+			"by_language": {
+				"svelte": 20,
+				"typescript": 50,
+				"css": 4
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_code",
+				"slug": "fuzdev/fuz_code",
+				"commit": "fea306ae68aa9f40155e108242d0b7168b49c41f",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_css/src",
+			"files": 146,
+			"by_language": {
+				"svelte": 39,
+				"typescript": 105,
+				"css": 2
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_css",
+				"slug": "fuzdev/fuz_css",
+				"commit": "9263f076e8b23c64564a2236b886279d1b42d626",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_docs/src",
+			"files": 65,
+			"by_language": {
+				"svelte": 45,
+				"typescript": 19,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_docs",
+				"slug": "fuzdev/fuz_docs",
+				"commit": "e27d7b7acbff67a442354cbd318df5d2c1f78552",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_gitops/src",
+			"files": 99,
+			"by_language": {
+				"svelte": 28,
+				"typescript": 70,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_gitops",
+				"slug": "fuzdev/fuz_gitops",
+				"commit": "6d1a90269e16559259d7660ba1b7b119da5967ac",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_mastodon/src",
+			"files": 25,
+			"by_language": {
+				"svelte": 15,
+				"typescript": 9,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_mastodon",
+				"slug": "fuzdev/fuz_mastodon",
+				"commit": "6179d626e50dd1a53540a074fc23c354c2985321",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_template/src",
+			"files": 18,
+			"by_language": {
+				"svelte": 10,
+				"typescript": 7,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_template",
+				"slug": "fuzdev/fuz_template",
+				"commit": "664498efdd7952010a314dd5e93f5ca0b269881e",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_ui/src",
+			"files": 216,
+			"by_language": {
+				"svelte": 121,
+				"typescript": 95,
+				"css": 0
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_ui",
+				"slug": "fuzdev/fuz_ui",
+				"commit": "067e491c40b360e150e24b2c591942f505d0046f",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../fuz_util/src",
+			"files": 145,
+			"by_language": {
+				"svelte": 8,
+				"typescript": 136,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/fuz_util",
+				"slug": "fuzdev/fuz_util",
+				"commit": "f7887bc67ba8398d4e1f858b319f2d83e7455d3e",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../mdz/src",
+			"files": 71,
+			"by_language": {
+				"svelte": 22,
+				"typescript": 48,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/mdz",
+				"slug": "fuzdev/mdz",
+				"commit": "860b62134eb9ecafd7a52240414e87bb481448f4",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../gro/src",
+			"files": 156,
+			"by_language": {
+				"svelte": 10,
+				"typescript": 146,
+				"css": 0
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/gro",
+				"slug": "fuzdev/gro",
+				"commit": "32af831867a0e73f98b4a6f2d35f435e21fea7db",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../svelte-docinfo/src",
+			"files": 99,
+			"by_language": {
+				"svelte": 22,
+				"typescript": 76,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/svelte-docinfo",
+				"slug": "fuzdev/svelte-docinfo",
+				"commit": "39e10bdff2ca77a82a8c017bbff004cc2f809aa0",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../tsv.fuz.dev/src",
+			"files": 34,
+			"by_language": {
+				"svelte": 17,
+				"typescript": 16,
+				"css": 1
+			},
+			"repo": {
+				"url": "https://github.com/fuzdev/tsv.fuz.dev",
+				"slug": "fuzdev/tsv.fuz.dev",
+				"commit": "a370a32a1dbe33c55026708019d0e403a91b13c3",
+				"subpath": "src"
+			}
+		},
+		{
+			"path": "../ryanatkn.com/src",
+			"files": 52,
+			"by_language": {
+				"svelte": 31,
+				"typescript": 20,
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-			"p95_ns": 19749809.1,
-			"p99_ns": 19835973.34,
-			"min_ns": 19083462,
-			"max_ns": 19889772,
-			"std_dev_ns": 170231.79292084067,
-			"cv": 0.008773122716525623,
-			"ops_per_second": 51.53633505232013,
-			"sample_size": 258,
-			"files_processed": 163,
-			"files_total": 193,
-			"files_iterated": 159
+			"mean_ns": 9123909.508840865,
+			"p50_ns": 9042106,
+			"p75_ns": 9416333.5,
+			"p90_ns": 9891497.4,
+			"p95_ns": 10234852.2,
+			"p99_ns": 14176169.600000005,
+			"min_ns": 8752205,
+			"max_ns": 18981239,
+			"std_dev_ns": 342912.83917107055,
+			"cv": 0.03758398073093509,
+			"ops_per_second": 109.60213919603459,
+			"sample_size": 509,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv-json",
 			"group": "parse/css",
-			"mean_ns": 176879819.27586207,
-			"p50_ns": 176417640,
-			"p75_ns": 178453737,
-			"p90_ns": 179335842.4,
-			"p95_ns": 179414368,
-			"p99_ns": 179869721.35999998,
-			"min_ns": 173847338,
-			"max_ns": 180029857,
-			"std_dev_ns": 1802916.9896241936,
-			"cv": 0.010192892535763852,
-			"ops_per_second": 5.653556206094932,
-			"sample_size": 29,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 159
+			"mean_ns": 17316347.027027026,
+			"p50_ns": 17274356,
+			"p75_ns": 17689193,
+			"p90_ns": 17922625.6,
+			"p95_ns": 19570044,
+			"p99_ns": 20664208.400000002,
+			"min_ns": 16632722,
+			"max_ns": 25342203,
+			"std_dev_ns": 313635.4404078728,
+			"cv": 0.01811210181445062,
+			"ops_per_second": 57.74890041411269,
+			"sample_size": 259,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv_wasm-json",
 			"group": "parse/css",
-			"mean_ns": 223033824.05555555,
-			"p50_ns": 222987561,
-			"p75_ns": 224042748.5,
-			"p90_ns": 226002163.2,
-			"p95_ns": 226359314,
-			"p99_ns": 226689078.04,
-			"min_ns": 222564338,
-			"max_ns": 226779975,
-			"std_dev_ns": 476931.02029914665,
-			"cv": 0.002138379783060832,
-			"ops_per_second": 4.483624868266213,
-			"sample_size": 18,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 159
+			"mean_ns": 18085558.795081966,
+			"p50_ns": 18020847,
+			"p75_ns": 18356488,
+			"p90_ns": 19277685.8,
+			"p95_ns": 19763633.6,
+			"p99_ns": 22989714.4,
+			"min_ns": 17680807,
+			"max_ns": 23769112,
+			"std_dev_ns": 317166.320415112,
+			"cv": 0.0175369931340667,
+			"ops_per_second": 55.29273445904981,
+			"sample_size": 244,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv-internal",
 			"group": "parse/css",
-			"mean_ns": 23123759.831578948,
-			"p50_ns": 23081315.5,
-			"p75_ns": 23581269.25,
-			"p90_ns": 25285569.600000005,
-			"p95_ns": 26399632.149999995,
-			"p99_ns": 34455670.899999976,
-			"min_ns": 22528124,
-			"max_ns": 43861736,
-			"std_dev_ns": 454153.9601688399,
-			"cv": 0.019640143448844544,
-			"ops_per_second": 43.24556245539061,
-			"sample_size": 190,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 159
+			"mean_ns": 3316126.9743024963,
+			"p50_ns": 3313593.5,
+			"p75_ns": 3338725.5,
+			"p90_ns": 3399061.8000000003,
+			"p95_ns": 3446014.9,
+			"p99_ns": 3507148.37,
+			"min_ns": 3260485,
+			"max_ns": 3995943,
+			"std_dev_ns": 26931.138323164356,
+			"cv": 0.008121262705517773,
+			"ops_per_second": 301.5566073763918,
+			"sample_size": 1362,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv_wasm-internal",
 			"group": "parse/css",
-			"mean_ns": 32072885.51879699,
-			"p50_ns": 32066954.5,
-			"p75_ns": 32148053.5,
-			"p90_ns": 32335215.5,
-			"p95_ns": 32349665.75,
-			"p99_ns": 32378088.75,
-			"min_ns": 31983936,
-			"max_ns": 32565198,
-			"std_dev_ns": 53586.24561517934,
-			"cv": 0.0016707647206789045,
-			"ops_per_second": 31.178984485631293,
-			"sample_size": 133,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 159
+			"mean_ns": 4737140.870020964,
+			"p50_ns": 4726423,
+			"p75_ns": 4774568,
+			"p90_ns": 4831878,
+			"p95_ns": 4860150.8,
+			"p99_ns": 4913048,
+			"min_ns": 4658890,
+			"max_ns": 5058387,
+			"std_dev_ns": 36121.217938256246,
+			"cv": 0.007625109518454408,
+			"ops_per_second": 211.09779663267108,
+			"sample_size": 954,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "prettier",
 			"group": "format/css",
-			"mean_ns": 731055145.8571428,
-			"p50_ns": 726866934,
-			"p75_ns": 737411474,
-			"p90_ns": 739494874,
-			"p95_ns": 740913023.5,
-			"p99_ns": 742047543.1,
-			"min_ns": 723869573,
-			"max_ns": 742331173,
-			"std_dev_ns": 7724050.9095097985,
-			"cv": 0.010565620053810789,
-			"ops_per_second": 1.3678858642428766,
-			"sample_size": 7,
-			"files_processed": 192,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 557339230,
+			"p50_ns": 549537411,
+			"p75_ns": 565597254,
+			"p90_ns": 578082432.8,
+			"p95_ns": 578788740.4,
+			"p99_ns": 579353786.48,
+			"min_ns": 539649489,
+			"max_ns": 579495048,
+			"std_dev_ns": 14362111.19491702,
+			"cv": 0.025769065627978528,
+			"ops_per_second": 1.7942393898954503,
+			"sample_size": 9,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv",
 			"group": "format/css",
-			"mean_ns": 42276700.15044248,
-			"p50_ns": 42363994,
-			"p75_ns": 42798711,
-			"p90_ns": 43541791.3,
-			"p95_ns": 44634919.449999996,
-			"p99_ns": 50024498.75,
-			"min_ns": 40686670,
-			"max_ns": 51286794,
-			"std_dev_ns": 850647.2521532943,
-			"cv": 0.020120947215043962,
-			"ops_per_second": 23.65369095604624,
-			"sample_size": 113,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 6774260.620414673,
+			"p50_ns": 6765946.5,
+			"p75_ns": 6830886.5,
+			"p90_ns": 6995684.8,
+			"p95_ns": 7064173.8,
+			"p99_ns": 7342010.549999992,
+			"min_ns": 6701634,
+			"max_ns": 10761764,
+			"std_dev_ns": 47048.678557182546,
+			"cv": 0.006945212355042601,
+			"ops_per_second": 147.6175860412626,
+			"sample_size": 627,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "tsv_wasm",
 			"group": "format/css",
-			"mean_ns": 56842907.02898551,
-			"p50_ns": 56836126.5,
-			"p75_ns": 57051209.25,
-			"p90_ns": 57277215.5,
-			"p95_ns": 57411214.85,
-			"p99_ns": 57614455.839999996,
-			"min_ns": 56701796,
-			"max_ns": 57937459,
-			"std_dev_ns": 94515.15490540798,
-			"cv": 0.0016627431608522859,
-			"ops_per_second": 17.59234445011894,
-			"sample_size": 69,
-			"files_processed": 165,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 9738625.60479042,
+			"p50_ns": 9710363,
+			"p75_ns": 9816992,
+			"p90_ns": 9914974.2,
+			"p95_ns": 9965780,
+			"p99_ns": 10203037.44,
+			"min_ns": 9549996,
+			"max_ns": 13430272,
+			"std_dev_ns": 103264.4596055366,
+			"cv": 0.010603596831440047,
+			"ops_per_second": 102.68389407105876,
+			"sample_size": 501,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "oxfmt",
 			"group": "format/css",
-			"mean_ns": 759715951,
-			"p50_ns": 758504294,
-			"p75_ns": 764356670.5,
-			"p90_ns": 792120220.8000001,
-			"p95_ns": 810371960.4,
-			"p99_ns": 824973352.0799999,
-			"min_ns": 755827467,
-			"max_ns": 828623700,
-			"std_dev_ns": 4300372.980217599,
-			"cv": 0.005660501105126328,
-			"ops_per_second": 1.3162814321375227,
-			"sample_size": 6,
-			"files_processed": 192,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 18918226.36781609,
+			"p50_ns": 18885129.5,
+			"p75_ns": 19345143.75,
+			"p90_ns": 19802674,
+			"p95_ns": 20013384.15,
+			"p99_ns": 21136025.340000004,
+			"min_ns": 17218416,
+			"max_ns": 21629487,
+			"std_dev_ns": 621908.927584265,
+			"cv": 0.0328735324069419,
+			"ops_per_second": 52.85907783095416,
+			"sample_size": 261,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		},
 		{
 			"name": "biome-wasm",
 			"group": "format/css",
-			"mean_ns": 207351523.875,
-			"p50_ns": 207159397,
-			"p75_ns": 208264123,
-			"p90_ns": 208754043.4,
-			"p95_ns": 209395575,
-			"p99_ns": 209795343.92,
-			"min_ns": 205889964,
-			"max_ns": 209888054,
-			"std_dev_ns": 897025.2129294197,
-			"cv": 0.004326108610950857,
-			"ops_per_second": 4.822727999832984,
-			"sample_size": 24,
-			"files_processed": 193,
-			"files_total": 193,
-			"files_iterated": 165
+			"mean_ns": 132540457.48387097,
+			"p50_ns": 133175334.5,
+			"p75_ns": 142052510.75,
+			"p90_ns": 179326793,
+			"p95_ns": 187457932.25,
+			"p99_ns": 211404413.35,
+			"min_ns": 123861288,
+			"max_ns": 212788173,
+			"std_dev_ns": 9449635.541954929,
+			"cv": 0.07129623453355644,
+			"ops_per_second": 7.544866065681804,
+			"sample_size": 31,
+			"files_processed": 50,
+			"files_total": 50,
+			"files_iterated": 50,
+			"runtime": "node"
 		}
 	],
-	"suppressed_noise": {
-		"oxfmt::textToDoc": 1,
-		"panicked at crates/biome_rowan": 1
-	}
+	"suppressed_noise": {},
+	"variant_parity": []
 }
diff --git a/src/routes/docs/benchmarks/benchmarks.ts b/src/routes/docs/benchmarks/benchmarks.ts
index e457993..f0cfa95 100644
--- a/src/routes/docs/benchmarks/benchmarks.ts
+++ b/src/routes/docs/benchmarks/benchmarks.ts
@@ -1,5 +1,5 @@
-import type {BenchmarkBaseline} from './benchmark_data.ts';
+import type { BenchmarkBaseline } from './benchmark_data.ts';
 
-import json from './benchmarks.json' with {type: 'json'};
+import json from './benchmarks.json' with { type: 'json' };
 
 export const benchmarks_json: BenchmarkBaseline = json as BenchmarkBaseline;
diff --git a/src/routes/docs/benchmarks/benchmarks_cli.ts b/src/routes/docs/benchmarks/benchmarks_cli.ts
new file mode 100644
index 0000000..1aead10
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_cli.ts
@@ -0,0 +1,144 @@
+// The independent end-to-end CLI benchmark — a fork of Oxc's official
+// `bench-formatter` that adds tsv (https://github.com/ryanatkn/oxc-bench-formatter,
+// forked from https://github.com/oxc-project/bench-formatter — `tsv` is the fork's
+// DEFAULT branch, so the bare fork URL already lands on it; upstream carries
+// neither tsv nor this analysis). Unlike the in-process, single-threaded numbers
+// elsewhere on this page, it measures the WHOLE CLI: process spawn, file
+// discovery, I/O, and each tool's default multi-file parallelism. tsv, oxfmt, and
+// biome parallelize across files while prettier is effectively serial, so the
+// wall-clock ratios scale with core count and are machine-dependent — the
+// parallelism-neutral view is CPU work (hyperfine `User` time). tsv runs only in
+// the JSX-free scenarios (it has no JSX/TSX parser).
+//
+// The numbers come from `benchmarks_formatters.json`, generated from that
+// harness's README by `benchmarks_formatters.gen.json.ts`; only the prose below
+// is authored here. To refresh: run `pnpm run update-readme` in the harness, then
+// `gro gen` here.
+
+import { benchmarks_formatters_json } from './benchmarks_formatters.ts';
+import type { FormatterScenario } from './formatter_benchmark_data.ts';
+
+export interface CliFormatterResult {
+	/** Display label; `tsv` is the reference row every ratio is computed against. */
+	label: string;
+	/** hyperfine wall-clock mean, in milliseconds — what you experience typing the command. */
+	wall_ms: number;
+	/** hyperfine `User` time (total CPU across all threads), in ms — the parallelism-neutral view. */
+	cpu_ms: number;
+	/** Peak resident set size (RSS), in megabytes; `null` when the harness measured no memory. */
+	memory_mb: number | null;
+}
+
+export interface CliScenario {
+	key: string;
+	heading: string;
+	/** One-line description of the corpus and what makes the comparison fair. */
+	description: string;
+	/** Whether every formatter is effectively single-threaded here (one input file). */
+	single_threaded: boolean;
+	/** Results ascending by wall-clock time, tsv-relative ratios computed by the component. */
+	results: Array<CliFormatterResult>;
+}
+
+export interface BenchmarksCliReport {
+	machine: string;
+	versions: Record<string, string>;
+	scenarios: Array<CliScenario>;
+}
+
+/**
+ * The prose framing for each scenario, keyed by its generated scenario id — the
+ * harness measures the numbers but doesn't explain them. Also fixes the page
+ * order, which is by narrative weight (the multi-file repo leads), not the order
+ * the harness runs them in. A scenario missing from here is dropped rather than
+ * rendered unexplained.
+ */
+const SCENARIO_COPY: Record<string, Omit<CliScenario, 'key' | 'results'>> = {
+	'typescript-only-tsv-fair': {
+		heading: 'TypeScript repo (Outline, non-JSX subset)',
+		description:
+			"Outline's .ts/.js/.mjs files — the common set every formatter supports, each scoped to it, with a preflight parse check confirming none reject anything. The fair way to put tsv on a real multi-file repo.",
+		single_threaded: false
+	},
+	'large-single-file': {
+		heading: 'Large single file (TypeScript compiler parser.ts, ~540KB)',
+		description:
+			'One ~13.7K-line .ts file. With a single input every formatter is effectively single-threaded, so wall-clock is close to an engine comparison here — except oxfmt, which spins up a worker pool it cannot use, inflating its CPU time.',
+		single_threaded: true
+	}
+};
+
+/**
+ * Display labels for the harness's hyperfine command names, which read better
+ * spaced out in a table. Names absent here are displayed as-is.
+ */
+export const CLI_LABELS: Record<string, string> = {
+	'prettier+oxc-parser': 'prettier + oxc-parser'
+};
+
+const to_results = (scenario: FormatterScenario): Array<CliFormatterResult> =>
+	scenario.timings
+		.map((timing) => ({
+			label: CLI_LABELS[timing.name] ?? timing.name,
+			wall_ms: timing.mean_ms,
+			cpu_ms: timing.user_ms,
+			memory_mb: scenario.memory.find((m) => m.name === timing.name)?.mean_mb ?? null
+		}))
+		.sort((a, b) => a.wall_ms - b.wall_ms);
+
+/** The scenarios the page has prose for; every one must resolve to generated data. */
+export const CLI_SCENARIO_KEYS = Object.keys(SCENARIO_COPY);
+
+const to_scenarios = (): Array<CliScenario> =>
+	Object.entries(SCENARIO_COPY).flatMap(([key, copy]) => {
+		const scenario = benchmarks_formatters_json.scenarios.find((s) => s.id === key);
+		return scenario ? [{ key, ...copy, results: to_results(scenario) }] : [];
+	});
+
+export const benchmarks_cli: BenchmarksCliReport = {
+	machine: benchmarks_formatters_json.machine,
+	versions: benchmarks_formatters_json.versions,
+	scenarios: to_scenarios()
+};
+
+/** The scenario id the page's prose calls "the TypeScript repo" — the multi-file, real-repo run. */
+export const CLI_TS_REPO_KEY = 'typescript-only-tsv-fair';
+
+/**
+ * How many times faster or lighter tsv is than `label` in one CLI scenario, by
+ * the given metric — the ratios the page's prose quotes.
+ *
+ * @returns the ratio, or `undefined` when the scenario, the formatter, or either
+ * side's measurement is absent
+ */
+export const cli_speedup_vs_tsv = (
+	scenario_key: string,
+	label: string,
+	metric: keyof Omit<CliFormatterResult, 'label'>
+): number | undefined => {
+	const results = benchmarks_cli.scenarios.find((s) => s.key === scenario_key)?.results;
+	const tsv = results?.find((r) => r.label === 'tsv')?.[metric];
+	const other = results?.find((r) => r.label === label)?.[metric];
+	if (tsv == null || other == null || !tsv) return undefined;
+	return other / tsv;
+};
+
+/**
+ * The span of "times less memory than tsv" across every non-tsv row, over one
+ * scenario or all of them — the prose's `3–13x` claim.
+ *
+ * @returns the low and high ratio, or `undefined` when nothing was measured
+ */
+export const cli_memory_ratio_range = (
+	scenario_key?: string
+): { min: number; max: number } | undefined => {
+	const scenarios = benchmarks_cli.scenarios.filter((s) => !scenario_key || s.key === scenario_key);
+	const ratios = scenarios.flatMap((scenario) =>
+		scenario.results
+			.filter((r) => r.label !== 'tsv')
+			.map((r) => cli_speedup_vs_tsv(scenario.key, r.label, 'memory_mb'))
+			.filter((ratio) => ratio !== undefined)
+	);
+	if (ratios.length === 0) return undefined;
+	return { min: Math.min(...ratios), max: Math.max(...ratios) };
+};
diff --git a/src/routes/docs/benchmarks/benchmarks_conformance.json b/src/routes/docs/benchmarks/benchmarks_conformance.json
new file mode 100644
index 0000000..82322b0
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_conformance.json
@@ -0,0 +1,650 @@
+{
+	"version": 7,
+	"runtime": "node",
+	"corpus_kind": "conformance",
+	"timestamp": "2026-07-22T09:27:46.776Z",
+	"git_commit": "d063479a",
+	"machine": {
+		"cpu_model": "AMD Ryzen 5 PRO 7530U with Radeon Graphics",
+		"os": "linux",
+		"arch": "x86_64",
+		"runtime_version": "24.14.1"
+	},
+	"corpus": {
+		"svelte": 4539,
+		"typescript": 44224,
+		"css": 22641
+	},
+	"corpus_sources": [
+		{
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diff --git a/src/routes/docs/benchmarks/benchmarks_conformance.ts b/src/routes/docs/benchmarks/benchmarks_conformance.ts
new file mode 100644
index 0000000..cf47f5d
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_conformance.ts
@@ -0,0 +1,5 @@
+import type { BenchmarkBaseline } from './benchmark_data.ts';
+
+import json from './benchmarks_conformance.json' with { type: 'json' };
+
+export const benchmarks_conformance_json: BenchmarkBaseline = json as BenchmarkBaseline;
diff --git a/src/routes/docs/benchmarks/benchmarks_cross_runtime.json b/src/routes/docs/benchmarks/benchmarks_cross_runtime.json
new file mode 100644
index 0000000..52ab6b6
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_cross_runtime.json
@@ -0,0 +1,739 @@
+{
+	"version": 7,
+	"kind": "combined",
+	"generated": "2026-07-22T09:27:01.099Z",
+	"runtimes": ["deno", "node", "bun"],
+	"mixed_vintage": false,
+	"mixed_machine": false,
+	"sources": [
+		{
+			"runtime": "deno",
+			"timestamp": "2026-07-22T09:08:34.891Z",
+			"git_commit": "d063479a",
+			"tsv": "0.2.0",
+			"machine": {
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+				"deno": 88.06396381287563,
+				"node": 102.68389407105876,
+				"bun": 104.09990571889091
+			},
+			"mean_ns": {
+				"deno": 11355382.573113207,
+				"node": 9738625.60479042,
+				"bun": 9606156.634765625
+			},
+			"files_iterated": {
+				"deno": 50,
+				"node": 50,
+				"bun": 50
+			}
+		},
+		{
+			"group": "format/css",
+			"name": "oxfmt",
+			"ops_per_second": {
+				"deno": 55.80449913414042,
+				"node": 52.85907783095416,
+				"bun": 46.70127981781842
+			},
+			"mean_ns": {
+				"deno": 17919702.0942029,
+				"node": 18918226.36781609,
+				"bun": 21412689.414529916
+			},
+			"files_iterated": {
+				"deno": 50,
+				"node": 50,
+				"bun": 50
+			}
+		},
+		{
+			"group": "format/css",
+			"name": "biome-wasm",
+			"ops_per_second": {
+				"deno": 10.13362212121382,
+				"node": 7.544866065681804
+			},
+			"mean_ns": {
+				"deno": 98681398.2244898,
+				"node": 132540457.48387097
+			},
+			"files_iterated": {
+				"deno": 50,
+				"node": 50
+			}
+		}
+	]
+}
diff --git a/src/routes/docs/benchmarks/benchmarks_cross_runtime.ts b/src/routes/docs/benchmarks/benchmarks_cross_runtime.ts
new file mode 100644
index 0000000..3793a17
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_cross_runtime.ts
@@ -0,0 +1,5 @@
+import type { CrossRuntimeReport } from './benchmark_data.ts';
+
+import json from './benchmarks_cross_runtime.json' with { type: 'json' };
+
+export const benchmarks_cross_runtime_json: CrossRuntimeReport = json as CrossRuntimeReport;
diff --git a/src/routes/docs/benchmarks/benchmarks_formatters.gen.json.ts b/src/routes/docs/benchmarks/benchmarks_formatters.gen.json.ts
new file mode 100644
index 0000000..6b91b5f
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_formatters.gen.json.ts
@@ -0,0 +1,40 @@
+import type { Gen } from '@fuzdev/gro/gen.ts';
+import { readFile } from 'node:fs/promises';
+import { resolve } from 'node:path';
+
+import { parse_formatter_benchmarks } from './formatter_benchmark_data.ts';
+
+// The formatter comparison harness lives in a sibling checkout and publishes its
+// results only as prose — see `formatter_benchmark_data.ts`.
+const README_PATH = '../oxc-bench-formatter/README.md';
+
+/**
+ * Generate `benchmarks_formatters.json` from the sibling formatter-benchmark
+ * harness's README.
+ *
+ * A MISSING sibling checkout is the one tolerated case — it's an optional repo,
+ * so generation is skipped, the committed JSON stands, and `gro gen --check`
+ * passes on a machine (or CI) that has only this repo. A README that IS present
+ * but doesn't parse fails the task instead: the alternative is quietly publishing
+ * stale or scenario-stripped numbers.
+ */
+export const gen: Gen = {
+	generate: async ({ log }) => {
+		const path = resolve(README_PATH);
+
+		let readme;
+		try {
+			readme = await readFile(path, 'utf8');
+		} catch (error) {
+			// only "it isn't there" is benign; an unreadable file is a real problem
+			if ((error as NodeJS.ErrnoException).code !== 'ENOENT') throw error;
+			log.info(`skipping formatter benchmarks, no readme at ${path}`);
+			return null;
+		}
+
+		const benchmarks = parse_formatter_benchmarks(readme);
+		log.info(`parsed ${benchmarks.scenarios.length} tsv scenario(s) from ${path}`);
+		return JSON.stringify(benchmarks);
+	},
+	dependencies: { files: [resolve(README_PATH)] }
+};
diff --git a/src/routes/docs/benchmarks/benchmarks_formatters.json b/src/routes/docs/benchmarks/benchmarks_formatters.json
new file mode 100644
index 0000000..c37f10b
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_formatters.json
@@ -0,0 +1,299 @@
+{
+	"machine": "AMD Ryzen 5 PRO 7530U with Radeon Graphics · 12 threads · linux x64",
+	"versions": {
+		"prettier": "3.9.5",
+		"biome": "2.5.4",
+		"oxfmt": "0.60.0",
+		"tsv": "0.1.0"
+	},
+	"scenarios": [
+		{
+			"id": "large-single-file",
+			"name": "Large Single File",
+			"target": "TypeScript compiler parser.ts (~540KB)",
+			"warmup_runs": 2,
+			"benchmark_runs": 5,
+			"preflight": [
+				{
+					"name": "prettier",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "biome",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "oxfmt",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "tsv",
+					"rejected": 0,
+					"unavailable": false
+				}
+			],
+			"timings": [
+				{
+					"name": "prettier",
+					"mean_ms": 1605,
+					"stddev_ms": 22,
+					"user_ms": 1541,
+					"system_ms": 858,
+					"min_ms": 1572,
+					"max_ms": 1623
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"mean_ms": 985,
+					"stddev_ms": 4.8,
+					"user_ms": 889,
+					"system_ms": 462.3,
+					"min_ms": 977.6,
+					"max_ms": 990
+				},
+				{
+					"name": "biome",
+					"mean_ms": 113.9,
+					"stddev_ms": 1.7,
+					"user_ms": 87.1,
+					"system_ms": 34.6,
+					"min_ms": 112.2,
+					"max_ms": 116.7
+				},
+				{
+					"name": "oxfmt",
+					"mean_ms": 195.8,
+					"stddev_ms": 9.4,
+					"user_ms": 354.4,
+					"system_ms": 201.4,
+					"min_ms": 188.1,
+					"max_ms": 211.9
+				},
+				{
+					"name": "tsv",
+					"mean_ms": 23.8,
+					"stddev_ms": 0.2,
+					"user_ms": 14.9,
+					"system_ms": 8.8,
+					"min_ms": 23.6,
+					"max_ms": 24.1
+				}
+			],
+			"baseline": "tsv",
+			"speedups": [
+				{
+					"name": "biome",
+					"ratio": 4.79,
+					"ratio_stddev": 0.08
+				},
+				{
+					"name": "oxfmt",
+					"ratio": 8.24,
+					"ratio_stddev": 0.4
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"ratio": 41.44,
+					"ratio_stddev": 0.43
+				},
+				{
+					"name": "prettier",
+					"ratio": 67.55,
+					"ratio_stddev": 1.13
+				}
+			],
+			"memory": [
+				{
+					"name": "prettier",
+					"mean_mb": 305.9,
+					"min_mb": 293.4,
+					"max_mb": 313.3,
+					"ratio": 12.34,
+					"ratio_stddev": 0.44
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"mean_mb": 196.2,
+					"min_mb": 194.6,
+					"max_mb": 197.9,
+					"ratio": 7.91,
+					"ratio_stddev": 0.19
+				},
+				{
+					"name": "biome",
+					"mean_mb": 101,
+					"min_mb": 98,
+					"max_mb": 104,
+					"ratio": 4.07,
+					"ratio_stddev": 0.13
+				},
+				{
+					"name": "oxfmt",
+					"mean_mb": 118.6,
+					"min_mb": 118.6,
+					"max_mb": 118.7,
+					"ratio": 4.79,
+					"ratio_stddev": 0.11
+				},
+				{
+					"name": "tsv",
+					"mean_mb": 24.8,
+					"min_mb": 24.2,
+					"max_mb": 25.6
+				}
+			]
+		},
+		{
+			"id": "typescript-only-tsv-fair",
+			"name": "TypeScript-only (tsv-fair)",
+			"target": "Outline repository (non-JSX JS/TS subset)",
+			"warmup_runs": 2,
+			"benchmark_runs": 5,
+			"preflight": [
+				{
+					"name": "prettier",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "biome",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "oxfmt",
+					"rejected": 0,
+					"unavailable": false
+				},
+				{
+					"name": "tsv",
+					"rejected": 0,
+					"unavailable": false
+				}
+			],
+			"timings": [
+				{
+					"name": "prettier",
+					"mean_ms": 8250,
+					"stddev_ms": 118,
+					"user_ms": 13524,
+					"system_ms": 882,
+					"min_ms": 8121,
+					"max_ms": 8382
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"mean_ms": 6740,
+					"stddev_ms": 24,
+					"user_ms": 8533,
+					"system_ms": 560,
+					"min_ms": 6710,
+					"max_ms": 6768
+				},
+				{
+					"name": "biome",
+					"mean_ms": 361.6,
+					"stddev_ms": 1.4,
+					"user_ms": 2510.6,
+					"system_ms": 350.3,
+					"min_ms": 359.7,
+					"max_ms": 363.1
+				},
+				{
+					"name": "oxfmt",
+					"mean_ms": 278.2,
+					"stddev_ms": 12.2,
+					"user_ms": 867.6,
+					"system_ms": 433.7,
+					"min_ms": 260.9,
+					"max_ms": 293
+				},
+				{
+					"name": "tsv",
+					"mean_ms": 65.4,
+					"stddev_ms": 2.9,
+					"user_ms": 439.2,
+					"system_ms": 137.6,
+					"min_ms": 63.2,
+					"max_ms": 70.2
+				}
+			],
+			"baseline": "tsv",
+			"speedups": [
+				{
+					"name": "oxfmt",
+					"ratio": 4.25,
+					"ratio_stddev": 0.26
+				},
+				{
+					"name": "biome",
+					"ratio": 5.53,
+					"ratio_stddev": 0.25
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"ratio": 102.99,
+					"ratio_stddev": 4.59
+				},
+				{
+					"name": "prettier",
+					"ratio": 126.06,
+					"ratio_stddev": 5.88
+				}
+			],
+			"memory": [
+				{
+					"name": "prettier",
+					"mean_mb": 472.9,
+					"min_mb": 385.2,
+					"max_mb": 529.1,
+					"ratio": 10.01,
+					"ratio_stddev": 1.38
+				},
+				{
+					"name": "prettier+oxc-parser",
+					"mean_mb": 302.5,
+					"min_mb": 300.6,
+					"max_mb": 304.4,
+					"ratio": 6.4,
+					"ratio_stddev": 0.37
+				},
+				{
+					"name": "biome",
+					"mean_mb": 211.6,
+					"min_mb": 207.1,
+					"max_mb": 213.7,
+					"ratio": 4.48,
+					"ratio_stddev": 0.26
+				},
+				{
+					"name": "oxfmt",
+					"mean_mb": 229.5,
+					"min_mb": 215.2,
+					"max_mb": 243.2,
+					"ratio": 4.86,
+					"ratio_stddev": 0.37
+				},
+				{
+					"name": "tsv",
+					"mean_mb": 47.3,
+					"min_mb": 44.2,
+					"max_mb": 50.2
+				}
+			]
+		}
+	]
+}
diff --git a/src/routes/docs/benchmarks/benchmarks_formatters.ts b/src/routes/docs/benchmarks/benchmarks_formatters.ts
new file mode 100644
index 0000000..0f0fa0d
--- /dev/null
+++ b/src/routes/docs/benchmarks/benchmarks_formatters.ts
@@ -0,0 +1,5 @@
+import type { FormatterBenchmarks } from './formatter_benchmark_data.ts';
+
+import json from './benchmarks_formatters.json' with { type: 'json' };
+
+export const benchmarks_formatters_json: FormatterBenchmarks = json as FormatterBenchmarks;
diff --git a/src/routes/docs/benchmarks/formatter_benchmark_data.ts b/src/routes/docs/benchmarks/formatter_benchmark_data.ts
new file mode 100644
index 0000000..ee23057
--- /dev/null
+++ b/src/routes/docs/benchmarks/formatter_benchmark_data.ts
@@ -0,0 +1,265 @@
+// Types and parser for the formatter comparison benchmark — Prettier, Biome,
+// Oxfmt, and tsv on shared corpora. Unlike the tsv bench reports, that harness
+// emits no JSON: its numbers exist only as the hyperfine console dump embedded
+// in its README between the `BENCHMARK_RESULTS_START`/`END` markers, plus a
+// `## Versions` list and a `_Measured on: …_` machine line. This module turns
+// that text into data; `benchmarks_formatters.gen.json.ts` writes it out.
+
+/** A single formatter's timing in one scenario. All durations in milliseconds. */
+export interface FormatterTiming {
+	name: string;
+	mean_ms: number;
+	stddev_ms: number;
+	min_ms: number;
+	max_ms: number;
+	user_ms: number;
+	system_ms: number;
+}
+
+/** A single formatter's peak-RSS measurement in one scenario. */
+export interface FormatterMemory {
+	name: string;
+	mean_mb: number;
+	min_mb: number;
+	max_mb: number;
+	/** Ratio to the scenario's lowest-memory formatter; absent on that baseline row. */
+	ratio?: number;
+	ratio_stddev?: number;
+}
+
+/** How a scenario's fastest formatter compares to one of the others. */
+export interface FormatterSpeedup {
+	name: string;
+	ratio: number;
+	ratio_stddev: number;
+}
+
+/**
+ * A formatter's parse-check result over the scenario's corpus. The harness runs
+ * this before timing so a tool that rejects files isn't credited for skipping
+ * them.
+ */
+export interface FormatterPreflight {
+	name: string;
+	/** Files the formatter refused to parse. */
+	rejected: number;
+	/** The formatter's binary never launched, so its timing row is meaningless. */
+	unavailable: boolean;
+}
+
+/** One benchmark scenario — a corpus benched across every formatter that supports it. */
+export interface FormatterScenario {
+	/** Slug derived from `name`, e.g. `large-single-file`. */
+	id: string;
+	name: string;
+	/** The corpus, as the harness describes it. */
+	target: string;
+	warmup_runs: number;
+	benchmark_runs: number;
+	preflight: Array<FormatterPreflight>;
+	timings: Array<FormatterTiming>;
+	/** The fastest formatter and its margin over each other one. */
+	baseline: string;
+	speedups: Array<FormatterSpeedup>;
+	memory: Array<FormatterMemory>;
+}
+
+/**
+ * The parsed formatter comparison. Only scenarios tsv participates in are
+ * included — it has no JSX/TSX parser, so the harness runs it on the JSX-free
+ * corpora only and the other scenarios have no tsv row to compare against.
+ */
+export interface FormatterBenchmarks {
+	/**
+	 * The machine the numbers came from. The ratios move with it — Biome, Oxfmt,
+	 * and tsv scale across cores while Prettier is effectively serial.
+	 */
+	machine: string;
+	/** Formatter name to version string, e.g. `prettier` to `3.9.1`. */
+	versions: Record<string, string>;
+	scenarios: Array<FormatterScenario>;
+}
+
+const to_slug = (value: string): string =>
+	value
+		.toLowerCase()
+		.replace(/[^a-z0-9]+/g, '-')
+		.replace(/^-|-$/g, '');
+
+/** Milliseconds from a hyperfine duration and its unit, e.g. `1.597` + `s`. */
+const to_ms = (value: string, unit: string): number => {
+	const n = Number(value);
+	if (unit === 's') return n * 1000;
+	if (unit === 'ms') return n;
+	if (unit === 'µs' || unit === 'us') return n / 1000;
+	throw new Error(`unknown duration unit: ${unit}`);
+};
+
+// The console dump the harness writes into its README.
+const RESULTS_START = '<!-- BENCHMARK_RESULTS_START -->';
+const RESULTS_END = '<!-- BENCHMARK_RESULTS_END -->';
+
+const SCENARIO_RE = /^=+\nBenchmarking (.+)\n=+$/gm;
+const TARGET_RE = /^Target: (.+)$/m;
+const RUNS_RE = /^- (\d+) warmup runs?, (\d+) benchmark runs?$/m;
+const TIMING_RE =
+	/^Benchmark \d+: (.+)\n\s*Time \(mean ± σ\):\s*([\d.]+) (\S+) ±\s*([\d.]+) (\S+)\s*\[User: ([\d.]+) (\S+), System: ([\d.]+) (\S+)\]\n\s*Range \(min … max\):\s*([\d.]+) (\S+) …\s*([\d.]+) (\S+)/gm;
+const SPEEDUP_BASELINE_RE = /^Summary\n\s*(.+?) ran$/m;
+const SPEEDUP_RE = /^\s*([\d.]+) ± ([\d.]+) times faster than (.+)$/gm;
+const MEMORY_RE =
+	/^\s*(\S+): ([\d.]+) MB \(min: ([\d.]+) MB, max: ([\d.]+) MB(?:, ([\d.]+) ± ([\d.]+) times more than \S+)?\)$/gm;
+const PREFLIGHT_HEADING = 'Preflight (per-formatter parse check):';
+const PREFLIGHT_RE = /^\s{2}(\S+): (clean|unavailable|\d+ rejected)/gm;
+const VERSIONS_RE = /^## Versions\n\n((?:- \*\*.+\*\*: .+\n)+)/m;
+const VERSION_RE = /^- \*\*(.+?)\*\*: (.+)$/gm;
+const MACHINE_RE = /^_Measured on: (.+?)(?: — |_$)/m;
+
+/** The text of one section of a scenario block, between two of its headings. */
+const slice_section = (block: string, start: string, ...ends: Array<string>): string => {
+	const from = block.indexOf(start);
+	if (from === -1) return '';
+	const rest = block.slice(from + start.length);
+	const to = ends.reduce((lowest, end) => {
+		const i = rest.indexOf(end);
+		return i === -1 || i >= lowest ? lowest : i;
+	}, rest.length);
+	return rest.slice(0, to);
+};
+
+const parse_timings = (block: string): Array<FormatterTiming> =>
+	[...block.matchAll(TIMING_RE)].map((m) => ({
+		name: m[1]!.trim(),
+		mean_ms: to_ms(m[2]!, m[3]!),
+		stddev_ms: to_ms(m[4]!, m[5]!),
+		user_ms: to_ms(m[6]!, m[7]!),
+		system_ms: to_ms(m[8]!, m[9]!),
+		min_ms: to_ms(m[10]!, m[11]!),
+		max_ms: to_ms(m[12]!, m[13]!)
+	}));
+
+const parse_preflight = (block: string): Array<FormatterPreflight> =>
+	[...slice_section(block, PREFLIGHT_HEADING, 'Benchmark 1:').matchAll(PREFLIGHT_RE)].map((m) => ({
+		name: m[1]!,
+		rejected: Number.parseInt(m[2]!, 10) || 0,
+		unavailable: m[2] === 'unavailable'
+	}));
+
+const parse_memory = (block: string): Array<FormatterMemory> =>
+	[...slice_section(block, 'Memory Usage:', ' benchmark complete!').matchAll(MEMORY_RE)].map(
+		(m) => ({
+			name: m[1]!,
+			mean_mb: Number(m[2]),
+			min_mb: Number(m[3]),
+			max_mb: Number(m[4]),
+			...(m[5] === undefined ? null : { ratio: Number(m[5]), ratio_stddev: Number(m[6]) })
+		})
+	);
+
+const parse_scenario = (name: string, block: string): FormatterScenario => {
+	const runs = RUNS_RE.exec(block);
+	const summary = slice_section(block, 'Summary\n', 'Memory Usage:', ' benchmark complete!');
+	const timings = parse_timings(block);
+	// A scenario banner with no timings under it means the timing lines changed
+	// shape, not that the harness measured nothing — hyperfine always prints them.
+	if (timings.length === 0) {
+		throw new Error(`formatter benchmarks: scenario "${name}" has no parseable timings`);
+	}
+	// Distinguish "not measured" from "misparsed": these sections are optional (no
+	// GNU time, no preflight in the JSX scenarios), but a section that's present
+	// and yields no rows is a broken pattern.
+	const memory = parse_memory(block);
+	if (block.includes('Memory Usage:') && memory.length === 0) {
+		throw new Error(`formatter benchmarks: scenario "${name}" has an unparseable memory section`);
+	}
+	const preflight = parse_preflight(block);
+	if (block.includes(PREFLIGHT_HEADING) && preflight.length === 0) {
+		throw new Error(
+			`formatter benchmarks: scenario "${name}" has an unparseable preflight section`
+		);
+	}
+	return {
+		id: to_slug(name),
+		name,
+		target: TARGET_RE.exec(block)?.[1] ?? '',
+		warmup_runs: Number(runs?.[1] ?? 0),
+		benchmark_runs: Number(runs?.[2] ?? 0),
+		preflight,
+		timings,
+		baseline: SPEEDUP_BASELINE_RE.exec(block)?.[1] ?? '',
+		speedups: [...summary.matchAll(SPEEDUP_RE)].map((m) => ({
+			name: m[3]!.trim(),
+			ratio: Number(m[1]),
+			ratio_stddev: Number(m[2])
+		})),
+		memory
+	};
+};
+
+/**
+ * Parse the formatter comparison out of the bench harness's README, keeping only
+ * the scenarios tsv runs in.
+ *
+ * Throws rather than returning a partial result: the harness publishes no JSON,
+ * so this parses prose, and a drifted heading or timing line would otherwise
+ * strip scenarios from the site silently. The caller decides what a MISSING
+ * README means (the sibling checkout is optional); everything past that point is
+ * a broken contract.
+ *
+ * @param readme - the full README text, markers included
+ * @returns the parsed benchmarks
+ * @throws if the results markers, the scenario banners, the versions list, the
+ * machine line, or any tsv scenario's numbers can't be parsed
+ */
+export const parse_formatter_benchmarks = (readme: string): FormatterBenchmarks => {
+	const start = readme.indexOf(RESULTS_START);
+	const end = readme.indexOf(RESULTS_END);
+	if (start === -1 || end === -1 || end < start) {
+		throw new Error(
+			`formatter benchmarks: no ${RESULTS_START} / ${
+				RESULTS_END
+			} block — is this the harness's readme?`
+		);
+	}
+	const results = readme.slice(start + RESULTS_START.length, end);
+
+	// Split on the scenario banners, pairing each title with the text that follows
+	// it up to the next banner.
+	const headings = [...results.matchAll(SCENARIO_RE)];
+	if (headings.length === 0) {
+		throw new Error('formatter benchmarks: results block carries no scenario banners');
+	}
+	const parsed = headings.map(({ 0: heading, 1: name, index }, i) =>
+		parse_scenario(name!.trim(), results.slice(index + heading.length, headings[i + 1]?.index))
+	);
+	// tsv has no JSX/TSX parser, so it sits out some scenarios by design — but if it
+	// ran in NONE of them, either the harness stopped benching tsv or the timing
+	// labels drifted, and the site would render a comparison without its subject.
+	const scenarios = parsed.filter((scenario) =>
+		scenario.timings.some((timing) => timing.name === 'tsv')
+	);
+	if (scenarios.length === 0) {
+		throw new Error(
+			`formatter benchmarks: no scenario includes a tsv row (found ${parsed
+				.map((s) => s.id)
+				.join(', ')})`
+		);
+	}
+
+	const versions: Record<string, string> = {};
+	const versions_block = VERSIONS_RE.exec(readme)?.[1] ?? '';
+	for (const m of versions_block.matchAll(VERSION_RE)) {
+		versions[m[1]!.toLowerCase()] = m[2]!.trim();
+	}
+	if (!versions.tsv) {
+		throw new Error("formatter benchmarks: no tsv version in the readme's `## Versions` list");
+	}
+
+	// The ratios move with the core count, so a report that can't say which machine
+	// produced it isn't publishable.
+	const machine = MACHINE_RE.exec(readme)?.[1]?.trim();
+	if (!machine) {
+		throw new Error('formatter benchmarks: no `_Measured on: …_` machine line');
+	}
+
+	return { machine, versions, scenarios };
+};
diff --git a/src/routes/docs/introduction/+page.svelte b/src/routes/docs/introduction/+page.svelte
index dfefa5f..62d8341 100644
--- a/src/routes/docs/introduction/+page.svelte
+++ b/src/routes/docs/introduction/+page.svelte
@@ -4,9 +4,9 @@
 	import TomeLink from '@fuzdev/fuz_ui/TomeLink.svelte';
 	import TomeSection from '@fuzdev/fuz_ui/TomeSection.svelte';
 	import TomeSectionHeader from '@fuzdev/fuz_ui/TomeSectionHeader.svelte';
-	import {tome_get_by_slug} from '@fuzdev/fuz_ui/tome.ts';
+	import { tome_get_by_slug } from '@fuzdev/fuz_ui/tome.ts';
 	import Svg from '@fuzdev/fuz_ui/Svg.svelte';
-	import {logo_tsv} from '@fuzdev/fuz_ui/logos.ts';
+	import { logo_tsv } from '@fuzdev/fuz_ui/logos.ts';
 
 	const LIBRARY_ITEM_NAME = 'introduction';
 
@@ -47,32 +47,29 @@ reconstruct_locations(ast, 'const x = 1;');`;
 		</p>
 		<p>
 			Compared to Oxc, Biome, and SWC, tsv is a set of focused tools, not a generic language
-			platform, so the focus is web standards and there's no support for JSX/SCSS/etc, beyond Svelte
-			as the only JS framework. The extensibility story is currently limited to using its Rust
-			crates as libraries; bridging to JS or WASM plugins is an open question, but may not be
-			supported.
+			platform, so the focus is Web standards + Svelte and there's no support for JSX/SCSS/etc. The
+			extensibility story is currently limited to using its Rust crates as libraries (or forking);
+			bridging to JS or WASM plugins is an open question (leaning against).
 		</p>
 		<p>tsv prioritizes, in order:</p>
 		<ol>
 			<li>correctness (Svelte and TypeScript conformance, spec adherence for HTML/CSS/JS)</li>
 			<li>speed</li>
 			<li>binary size and memory usage</li>
-			<li>extensibility (valued but deprioritized)</li>
+			<li>extensibility (valued but deprioritized), modularity, and reusability</li>
 		</ol>
 		<p>
-			See the <a href="https://tsv.fuz.dev/docs/benchmarks">benchmarks</a> for stats. Compared to Oxc
-			and Biome, tsv is significantly faster, smaller, and uses less memory to parse and format its supported
-			languages
+			See the <TomeLink slug="benchmarks" /> for stats. Compared to Oxc and Biome, tsv is faster, smaller,
+			and uses less memory to parse and format its supported languages.
 		</p>
 		<p>
-			This is an early release, and reports and feedback are appreciated - see the
+			This is an early release, and reports and feedback are appreciated — see the
 			<a href="https://github.com/fuzdev/tsv/issues">issues</a> and
 			<a href="https://github.com/fuzdev/tsv/discussions">discussions</a>.
 		</p>
 		<p>
-			AI disclosure: this codebase is mostly LLM-generated, and the usual caveats apply. The first
-			release took 7 months and ~1800 manual commits. It's a high-effort project that prioritizes
-			quality.
+			AI disclosure: this codebase is mostly LLM-generated, and the usual caveats apply. It's a
+			high-effort project that prioritizes quality.
 		</p>
 		<p>
 			These docs are a work in progress. For design details see the <a
@@ -95,7 +92,7 @@ reconstruct_locations(ast, 'const x = 1;');`;
 				See the <TomeLink slug="benchmarks" /> for size and performance details.
 			</p>
 			<p>
-				Native builds are not yet available but are coming in v0.2, see
+				Native builds are not yet published — follow
 				<a href="https://github.com/fuzdev/tsv/issues/139">issue 139</a>.
 			</p>
 		</TomeSection>
@@ -137,11 +134,11 @@ reconstruct_locations(ast, 'const x = 1;');`;
 			<TomeSectionHeader text="Source code" />
 			<ul>
 				<li>
-					<a href="https://github.com/fuzdev/tsv">github.com/fuzdev/tsv</a> - the formatter, parser, wasm
+					<a href="https://github.com/fuzdev/tsv">github.com/fuzdev/tsv</a> — the formatter, parser, wasm
 					bindings, CLI, etc
 				</li>
 				<li>
-					<a href="https://github.com/fuzdev/tsv.fuz.dev">github.com/fuzdev/tsv.fuz.dev</a> - this website
+					<a href="https://github.com/fuzdev/tsv.fuz.dev">github.com/fuzdev/tsv.fuz.dev</a> — this website
 				</li>
 			</ul>
 		</TomeSection>
diff --git a/src/routes/docs/playground/+page.svelte b/src/routes/docs/playground/+page.svelte
index f9c38ed..aefc746 100644
--- a/src/routes/docs/playground/+page.svelte
+++ b/src/routes/docs/playground/+page.svelte
@@ -1,16 +1,16 @@
 <script lang="ts">
-	import {page} from '$app/state';
+	import { page } from '$app/state';
 	import TomeContent from '@fuzdev/fuz_ui/TomeContent.svelte';
 	import TomeLink from '@fuzdev/fuz_ui/TomeLink.svelte';
-	import {tome_get_by_slug} from '@fuzdev/fuz_ui/tome.ts';
-	import {DOCS_PATH} from '@fuzdev/fuz_ui/docs_helpers.svelte.ts';
+	import { tome_get_by_slug } from '@fuzdev/fuz_ui/tome.ts';
+	import { DOCS_PATH } from '@fuzdev/fuz_ui/docs_helpers.svelte.ts';
 
 	import Playground from './Playground.svelte';
 
 	const tome = tome_get_by_slug('playground');
 
 	// The `/docs` index renders every tome's component via `DocsContent`, which would
-	// mount `Playground` and pull in its ~900KB WASM. Guard like fuz_css's api tome:
+	// mount `Playground` and pull in its ~900KB-gzipped WASM. Guard like fuz_css's api tome:
 	// show only a link at the root, the full playground at `/docs/playground`.
 	const at_root = $derived(page.url.pathname === DOCS_PATH);
 </script>
diff --git a/src/routes/docs/playground/Playground.svelte b/src/routes/docs/playground/Playground.svelte
index ba20a09..980fba7 100644
--- a/src/routes/docs/playground/Playground.svelte
+++ b/src/routes/docs/playground/Playground.svelte
@@ -5,13 +5,14 @@
 
 	import Code from '@fuzdev/fuz_code/Code.svelte';
 	import CodeTextarea from '@fuzdev/fuz_code/CodeTextarea.svelte';
-	import {supports_css_highlight_api} from '@fuzdev/fuz_code/highlight_manager.ts';
-	import {to_error_message} from '@fuzdev/fuz_util/error.ts';
+	import { supports_css_highlight_api } from '@fuzdev/fuz_code/highlight_manager.ts';
+	import CopyToClipboard from '@fuzdev/fuz_ui/CopyToClipboard.svelte';
+	import { to_error_message } from '@fuzdev/fuz_util/error.ts';
 
-	import {playground_example} from './playground_example.ts';
+	import { playground_example } from './playground_example.ts';
 
 	// `@fuzdev/tsv_wasm` is loaded lazily, in the browser only — a dynamic import
-	// so the ~900KB WASM lands in its own chunk, fetched the first time this
+	// so the ~900KB-gzipped WASM lands in its own chunk, fetched the first time this
 	// component mounts and never pulled into `/docs` or the prerendered HTML.
 	let tsv: typeof import('@fuzdev/tsv_wasm') | null = $state(null);
 	let load_error: string | null = $state(null);
@@ -23,7 +24,7 @@
 	const ready = $derived(tsv !== null);
 
 	// A tsv call's outcome: its string result, or the thrown error's message.
-	type Outcome = {value: string; error: null} | {value: null; error: string};
+	type Outcome = { value: string; error: null } | { value: null; error: string };
 
 	// Run a tsv call, capturing a thrown error as a message; `null` until the WASM
 	// loads. Lets `formatted` and `ast` share one shape and recompute as `source` changes
@@ -31,9 +32,9 @@
 	const run = (fn: (t: NonNullable<typeof tsv>) => string): Outcome | null => {
 		if (!tsv) return null;
 		try {
-			return {value: fn(tsv), error: null};
+			return { value: fn(tsv), error: null };
 		} catch (err) {
-			return {value: null, error: to_error_message(err)};
+			return { value: null, error: to_error_message(err) };
 		}
 	};
 
@@ -72,6 +73,8 @@
 		};
 	});
 
+	const is_base = $derived(source === playground_example);
+
 	const reset = (): void => {
 		source = playground_example;
 	};
@@ -84,8 +87,8 @@
 	};
 </script>
 
-<header class="row">
-	<button type="button" class="plain" onclick={reset} disabled={!ready}>reset</button>
+<header class="row mb_xs">
+	<button type="button" class="plain" onclick={reset} disabled={!ready || is_base}>reset</button>
 	<button type="button" class="plain" onclick={format} disabled={!ready || error !== null}>
 		format
 	</button>
@@ -112,7 +115,10 @@
 		<p>formatted</p>
 		<Code lang="svelte" content={formatted?.value ?? ''} />
 		<p>AST</p>
-		<Code lang="json" content={ast?.value ?? ''} class="ast" />
+		<div class="ast_output">
+			<CopyToClipboard text={ast?.value ?? ''} class="ast_copy" />
+			<Code lang="json" content={ast?.value ?? ''} class="ast" />
+		</div>
 	{/if}
 </section>
 
@@ -132,6 +138,24 @@
 	section :global(.ast) {
 		max-height: 500px;
 	}
+	/* float a copy button over the AST pane's top-right corner; it stays pinned as
+	   the pane scrolls since it's absolute to this wrapper, not inside the scroller */
+	.ast_output {
+		position: relative;
+	}
+	.ast_output :global(.ast_copy) {
+		--font_size: var(--font_size_lg);
+		position: absolute;
+		top: var(--space_xs);
+		/* clear the pane's scrollbar */
+		right: var(--space_md);
+		z-index: 1;
+		background: var(--shade_00);
+	}
+	/* TODO hacky */
+	.ast_output :global(.ast_copy > div) {
+		width: auto !important;
+	}
 	.error {
 		color: var(--color_e_40);
 		white-space: pre-wrap;
diff --git a/src/routes/docs/tomes.ts b/src/routes/docs/tomes.ts
index 733ca43..c53039a 100644
--- a/src/routes/docs/tomes.ts
+++ b/src/routes/docs/tomes.ts
@@ -1,4 +1,4 @@
-import type {Tome} from '@fuzdev/fuz_ui/tome.ts';
+import type { Tome } from '@fuzdev/fuz_ui/tome.ts';
 import IntroductionPage from './introduction/+page.svelte';
 import PlaygroundPage from './playground/+page.svelte';
 import BenchmarksPage from './benchmarks/+page.svelte';
@@ -10,7 +10,7 @@ export const tomes: Array<Tome> = [
 		Component: IntroductionPage,
 		related_tomes: ['playground', 'benchmarks'],
 		related_modules: [],
-		related_declarations: [],
+		related_declarations: []
 	},
 	{
 		slug: 'playground',
@@ -18,7 +18,7 @@ export const tomes: Array<Tome> = [
 		Component: PlaygroundPage,
 		related_tomes: ['introduction', 'benchmarks'],
 		related_modules: [],
-		related_declarations: [],
+		related_declarations: []
 	},
 	{
 		slug: 'benchmarks',
@@ -26,6 +26,6 @@ export const tomes: Array<Tome> = [
 		Component: BenchmarksPage,
 		related_tomes: ['introduction', 'playground'],
 		related_modules: [],
-		related_declarations: [],
-	},
+		related_declarations: []
+	}
 ];
diff --git a/src/routes/example.test.ts b/src/routes/example.test.ts
index 57684dd..7e61731 100644
--- a/src/routes/example.test.ts
+++ b/src/routes/example.test.ts
@@ -1,4 +1,4 @@
-import {assert, test} from 'vitest';
+import { assert, test } from 'vitest';
 
 test('tests work', () => {
 	assert.strictEqual('ok', 'OK'.toLowerCase());
diff --git a/src/routes/library.ts b/src/routes/library.ts
index b2aa8df..b47f208 100644
--- a/src/routes/library.ts
+++ b/src/routes/library.ts
@@ -1,5 +1,5 @@
-import {library_json_from_modules} from '@fuzdev/fuz_util/library_json.ts';
-import {modules} from 'virtual:svelte-docinfo';
+import { library_json_from_modules } from '@fuzdev/fuz_util/library_json.ts';
+import { modules } from 'virtual:svelte-docinfo';
 import pkg_json from 'virtual:pkg.json';
 
 export const library_json = library_json_from_modules(pkg_json, modules);
diff --git a/src/test/benchmark_data.test.ts b/src/test/benchmark_data.test.ts
index 0f6e8d0..8f3c92a 100644
--- a/src/test/benchmark_data.test.ts
+++ b/src/test/benchmark_data.test.ts
@@ -1,9 +1,34 @@
-import {assert, describe, test} from 'vitest';
+import { assert, describe, test } from 'vitest';
 
-import {benchmarks_json} from '$routes/docs/benchmarks/benchmarks.ts';
+import { benchmarks_json } from '$routes/docs/benchmarks/benchmarks.ts';
+import { benchmarks_conformance_json } from '$routes/docs/benchmarks/benchmarks_conformance.ts';
+import { benchmarks_cross_runtime_json } from '$routes/docs/benchmarks/benchmarks_cross_runtime.ts';
+import { benchmarks_formatters_json } from '$routes/docs/benchmarks/benchmarks_formatters.ts';
 import {
+	benchmarks_cli,
+	CLI_LABELS,
+	CLI_SCENARIO_KEYS,
+	cli_memory_ratio_range,
+	cli_speedup_vs_tsv,
+	CLI_TS_REPO_KEY
+} from '$routes/docs/benchmarks/benchmarks_cli.ts';
+import {
+	benchmark_speedup,
+	categorize_size_capability,
+	compute_baseline_ratio,
 	derive_benchmark_groups,
+	derive_conformance_groups,
+	derive_corpus_repos,
+	derive_cross_runtime_groups,
+	derive_size_groups,
 	derive_speedup_summary,
+	format_coverage_percent,
+	format_ratio_approx,
+	format_ratio_range,
+	format_speedup_signed,
+	order_cross_runtime_runtimes,
+	OXC_FULL_LABEL,
+	OXFMT_WASM_LABEL
 } from '$routes/docs/benchmarks/benchmark_data.ts';
 
 // Shape gate for the committed benchmarks.json: the bench report format drifts
@@ -12,17 +37,18 @@ import {
 // When `npm run update-benchmarks` pulls in a new shape, these fail loudly.
 describe('benchmarks.json shape', () => {
 	test('baseline version is current', () => {
-		assert.isAtLeast(benchmarks_json.version, 4);
+		// version 5 is the first per-runtime report shape (carries `runtime`)
+		assert.isAtLeast(benchmarks_json.version, 5);
 	});
 
-	test('binary sizes include the ratio anchors', () => {
+	test('binary sizes include the flagship tsv builds', () => {
 		const labels = benchmarks_json.binary_sizes.map((s) => s.label);
-		assert.include(labels, 'tsv (native)'); // native anchor
-		assert.include(labels, 'tsv_wasm'); // wasm anchor (the full build)
+		assert.include(labels, 'tsv (napi)'); // flagship N-API build (perf report anchor)
+		assert.include(labels, 'tsv_wasm'); // the full wasm build — smallest full-toolchain, size baseline
 	});
 
 	test('versions carries the keys the meta component renders', () => {
-		const {versions} = benchmarks_json;
+		const { versions } = benchmarks_json;
 		assert.isString(versions.svelte);
 		assert.isString(versions.acorn_ts);
 		assert.isString(versions.prettier);
@@ -35,13 +61,151 @@ describe('benchmarks.json shape', () => {
 		}
 	});
 
-	test('every group derives a canonical entry and a timed-set count', () => {
+	test('every group leads with its canonical entry (the default anchor) and a timed-set count', () => {
 		const groups = derive_benchmark_groups(benchmarks_json);
 		assert.isAtLeast(groups.length, 6); // format+parse × svelte/typescript/css
 		for (const group of groups) {
 			const key = `${group.operation}/${group.language}`;
 			assert.ok(group.canonical_entry, `${key} has no canonical entry`);
+			// the canonical reference sorts first, so it's the default 1.0x anchor the
+			// shared component reads off the leading row
+			assert.strictEqual(group.entries[0]?.category, 'canonical', `${key} canonical leads`);
 			assert.isNotNull(group.files_iterated, `${key} has no files_iterated`);
+			for (const entry of group.entries) {
+				if (entry.disabled) continue;
+				// measured entries render the whole-sweep mean (total corpus time); a
+				// zero would misread as an instantaneous run
+				assert.isAbove(entry.mean_ns, 0, `${key}/${entry.name} has no mean`);
+			}
+		}
+	});
+
+	test('svelte/css parse groups get disabled oxc placeholders, typescript keeps real ones', () => {
+		const groups = derive_benchmark_groups(benchmarks_json);
+		const parse = (language: string) =>
+			groups.find((g) => g.operation === 'parse' && g.language === language);
+
+		// typescript actually runs oxc-parser — its oxc entries are real, not placeholders
+		const ts = parse('typescript');
+		const ts_oxc = ts?.entries.filter((e) => e.category === 'oxc') ?? [];
+		assert.isNotEmpty(ts_oxc);
+		for (const e of ts_oxc) assert.isNotOk(e.disabled, `${e.name} should be a real entry`);
+
+		// svelte and css mirror those oxc entries in, disabled, in the same fixed slot:
+		// directly after the biome placeholder (both lead the cross-tool comparisons,
+		// right after the canonical row) and before tsv's json wires
+		for (const language of ['svelte', 'css']) {
+			const group = parse(language);
+			assert.ok(group, `${language} parse group missing`);
+			const oxc = group.entries.filter((e) => e.category === 'oxc');
+			assert.strictEqual(oxc.length, ts_oxc.length, `${language} oxc placeholder count`);
+			for (const e of oxc) {
+				assert.ok(e.disabled, `${language} ${e.name} should be disabled`);
+				assert.strictEqual(e.bar_fraction, 0, `${language} ${e.name} bar`);
+			}
+			const names = group.entries.map((e) => e.name);
+			const first_biome = names.findIndex((n) => n.includes('biome'));
+			const first_oxc = names.findIndex((n) => n.includes('oxc'));
+			const first_json = names.findIndex((n) => n.endsWith('-json') || n.endsWith('-no-locations'));
+			assert.strictEqual(first_oxc, first_biome + 1, `${language} oxc directly after biome`);
+			assert.isBelow(first_oxc, first_json, `${language} oxc before the tsv json entries`);
+		}
+	});
+
+	test('every parse group gets a disabled biome placeholder, since biome never exposes a parser to JS', () => {
+		const groups = derive_benchmark_groups(benchmarks_json);
+		for (const language of ['svelte', 'typescript', 'css']) {
+			const group = groups.find((g) => g.operation === 'parse' && g.language === language);
+			assert.ok(group, `${language} parse group missing`);
+			const biome = group.entries.filter((e) => e.category === 'biome');
+			assert.strictEqual(biome.length, 1, `${language} biome placeholder count`);
+			const [entry] = biome;
+			assert.ok(entry, `${language} biome entry missing`);
+			assert.ok(entry.disabled, `${language} biome entry should be disabled`);
+			assert.strictEqual(entry.bar_fraction, 0, `${language} biome bar`);
+
+			// biome leads the cross-tool comparisons: directly after the single canonical
+			// row (index 0), before tsv's json wires
+			const names = group.entries.map((e) => e.name);
+			const first_biome = names.findIndex((n) => n.includes('biome'));
+			const first_json = names.findIndex((n) => n.endsWith('-json') || n.endsWith('-no-locations'));
+			assert.strictEqual(first_biome, 1, `${language} biome directly after the canonical row`);
+			assert.isBelow(first_biome, first_json, `${language} biome before the tsv json entries`);
+		}
+	});
+
+	test('svelte/css format groups get disabled dprint placeholders, typescript keeps real ones', () => {
+		const groups = derive_benchmark_groups(benchmarks_json);
+		const format = (language: string) =>
+			groups.find((g) => g.operation === 'format' && g.language === language);
+
+		// typescript actually runs dprint — its entry is real, not a placeholder
+		const ts = format('typescript');
+		const ts_dprint = ts?.entries.filter((e) => e.category === 'dprint') ?? [];
+
+		// The dprint row postdates older reports. With no measured entry there is
+		// nothing to mirror, and the derivation deliberately leaves every group
+		// untouched — so assert exactly that (no invented rows) and stop. Refreshing
+		// the report is what promotes this to the full assertion below.
+		if (ts_dprint.length === 0) {
+			for (const language of ['svelte', 'css']) {
+				const group = format(language);
+				assert.isEmpty(
+					group?.entries.filter((e) => e.category === 'dprint') ?? [],
+					`${language} must not invent a dprint row when the report carries none`
+				);
+			}
+			return;
+		}
+
+		for (const e of ts_dprint) assert.isNotOk(e.disabled, `${e.name} should be a real entry`);
+
+		// svelte and css mirror it in, disabled: dprint's `@dprint/typescript` plugin
+		// rejects CSS and Svelte outright, so those groups have no real entry
+		for (const language of ['svelte', 'css']) {
+			const group = format(language);
+			assert.ok(group, `${language} format group missing`);
+			const dprint = group.entries.filter((e) => e.category === 'dprint');
+			assert.strictEqual(dprint.length, ts_dprint.length, `${language} dprint placeholder count`);
+			for (const e of dprint) {
+				assert.ok(e.disabled, `${language} ${e.name} should be disabled`);
+				assert.strictEqual(e.bar_fraction, 0, `${language} ${e.name} bar`);
+			}
+			// dprint sits between biome and oxc in the shared cross-tool ordering
+			const names = group.entries.map((e) => e.name);
+			const first_biome = names.findIndex((n) => n.includes('biome'));
+			const first_dprint = names.findIndex((n) => n.includes('dprint'));
+			assert.strictEqual(first_dprint, first_biome + 1, `${language} dprint directly after biome`);
+		}
+	});
+
+	test('format/parse rows follow the fixed canonical → biome → dprint → oxc → json → internal order', () => {
+		// independently mirrors the requested row order so a regression in the
+		// derivation's comparator fails here
+		const tier = (name: string, category: string): number => {
+			if (category === 'canonical') return 0;
+			if (category === 'biome') return 1;
+			if (category === 'dprint') return 2;
+			if (category === 'oxc') return 3;
+			if (name.endsWith('-no-locations')) return 4; // tsv json, span-only wire
+			if (name.endsWith('-json')) return 5; // tsv json, loc-carrying wire
+			return 6; // tsv internal engine
+		};
+		for (const group of derive_benchmark_groups(benchmarks_json)) {
+			const key = `${group.operation}/${group.language}`;
+			const tiers = group.entries.map((e) => tier(e.name, e.category));
+			assert.deepEqual(
+				tiers,
+				[...tiers].toSorted((a, b) => a - b),
+				`${key} tier order`
+			);
+			// wasm precedes native within a tier
+			for (let i = 1; i < group.entries.length; i++) {
+				if (tiers[i] !== tiers[i - 1]) continue;
+				const prev_wasm = group.entries[i - 1]!.name.includes('wasm');
+				const curr_wasm = group.entries[i]!.name.includes('wasm');
+				assert.isFalse(!prev_wasm && curr_wasm, `${key} native precedes wasm within a tier`);
+			}
 		}
 	});
 
@@ -54,4 +218,377 @@ describe('benchmarks.json shape', () => {
 			assert.isDefined(row.format_css, row.variant);
 		}
 	});
+
+	test('binary sizes group by capability with one smallest-build ratio anchor', () => {
+		const groups = derive_size_groups(benchmarks_json.binary_sizes);
+		// full / formatter / parser, in that order, all present in the current data
+		assert.deepStrictEqual(
+			groups.map((g) => g.capability),
+			['full', 'formatter', 'parser']
+		);
+		for (const group of groups) {
+			assert.isNotEmpty(group.entries);
+			// every entry lands in the group its capability names
+			for (const e of group.entries) {
+				assert.strictEqual(categorize_size_capability(e.label), group.capability);
+			}
+			// the group's default ratio anchor (its 1.0x row) is the single smallest real
+			// build, and it leads the group — the shared component reads every ratio off
+			// the first row. Disabled placeholders (e.g. oxfmt's absent wasm build) never
+			// sort first.
+			const real = group.entries.filter((e) => !e.disabled);
+			const smallest = real.reduce((a, b) => (a.bytes <= b.bytes ? a : b));
+			assert.strictEqual(
+				group.entries[0]?.label,
+				smallest.label,
+				`${group.capability} smallest leads`
+			);
+		}
+		// the parser group pits tsv against oxc-parser in both kinds
+		const parser = groups.find((g) => g.capability === 'parser');
+		const parser_labels = parser?.entries.map((e) => e.label) ?? [];
+		assert.include(parser_labels, 'oxc-parser (wasm)');
+		assert.include(parser_labels, 'oxc-parser (napi)');
+	});
+
+	test('full toolchain group carries the combined oxc-parser + oxfmt entry', () => {
+		const sizes = benchmarks_json.binary_sizes;
+		const groups = derive_size_groups(sizes);
+		const full = groups.find((g) => g.capability === 'full');
+		const combined = full?.entries.find((e) => e.label === OXC_FULL_LABEL);
+		assert.ok(combined, 'combined oxc entry missing from full toolchain group');
+
+		// its bytes and gzip are the sum of oxc's separate parser and formatter builds
+		const oxc_parser = sizes.find((s) => s.label === 'oxc-parser (napi)');
+		const oxfmt = sizes.find((s) => s.label === 'oxfmt (napi)');
+		assert.ok(oxc_parser && oxfmt, 'source oxc builds missing');
+		assert.strictEqual(combined.bytes, oxc_parser.bytes + oxfmt.bytes);
+		assert.strictEqual(combined.gzip_bytes, oxc_parser.gzip_bytes! + oxfmt.gzip_bytes!);
+
+		// native build, colored as oxc
+		assert.strictEqual(combined.kind, 'native');
+		assert.strictEqual(combined.category, 'oxc');
+	});
+
+	test('formatter group gets a disabled oxfmt (wasm) placeholder just above oxfmt (napi), since oxfmt has no wasm build', () => {
+		const groups = derive_size_groups(benchmarks_json.binary_sizes);
+		const formatter = groups.find((g) => g.capability === 'formatter');
+		assert.ok(formatter, 'formatter group missing');
+
+		const placeholder = formatter.entries.find((e) => e.label === OXFMT_WASM_LABEL);
+		assert.ok(placeholder, 'oxfmt (wasm) placeholder missing');
+		assert.ok(placeholder.disabled, 'oxfmt (wasm) should be disabled');
+		assert.strictEqual(placeholder.kind, 'wasm');
+		assert.strictEqual(placeholder.category, 'oxc');
+		assert.strictEqual(placeholder.bar_fraction, 0);
+
+		const labels = formatter.entries.map((e) => e.label);
+		const placeholder_index = labels.indexOf(OXFMT_WASM_LABEL);
+		const native_index = labels.indexOf('oxfmt (napi)');
+		assert.isAbove(native_index, -1, 'oxfmt (napi) missing from formatter group');
+		assert.strictEqual(
+			placeholder_index,
+			native_index - 1,
+			'placeholder should sit just above oxfmt (napi)'
+		);
+	});
+
+	test('flagship report is the node runtime', () => {
+		// the headline detailed view switched to N-API under Node; guards against an
+		// `update-benchmarks` that pulls the wrong runtime's sibling report
+		assert.strictEqual(benchmarks_json.runtime, 'node');
+	});
+});
+
+// Shape gate for the committed conformance report `benchmarks_conformance.json`
+// (tsv's `report.conformance.node.json` — the parse-coverage surface over the
+// deliberately-hard fixture suites, disjoint from the perf corpus, Svelte set minus
+// canonical-rejects), consumed by the Parse conformance section.
+describe('benchmarks_conformance.json shape', () => {
+	test('report is the conformance surface at the current version', () => {
+		assert.isAtLeast(benchmarks_conformance_json.version, 6);
+		assert.strictEqual(benchmarks_conformance_json.corpus_kind, 'conformance');
+		assert.strictEqual(benchmarks_conformance_json.runtime, 'node');
+	});
+
+	test('conformance report is parse-only', () => {
+		for (const entry of benchmarks_conformance_json.entries) {
+			assert.match(entry.group, /^parse\//, `${entry.group}/${entry.name}`);
+		}
+	});
+
+	test('corpus sources disclose the composition', () => {
+		assert.isNotEmpty(benchmarks_conformance_json.corpus_sources ?? []);
+	});
+
+	test('derives one coverage group per language, each with a tsv row and full coverage data', () => {
+		const groups = derive_conformance_groups(benchmarks_conformance_json);
+		assert.strictEqual(groups.length, 3); // svelte / typescript / css
+		assert.deepEqual(
+			groups.map((g) => g.language),
+			['svelte', 'typescript', 'css']
+		);
+		for (const group of groups) {
+			assert.ok(
+				group.rows.some((r) => r.name === 'tsv'),
+				`${group.language} has a tsv row`
+			);
+			// rows are ordered by coverage, highest first
+			const fractions = group.rows.map((r) => r.coverage_fraction);
+			assert.deepEqual(
+				fractions,
+				[...fractions].toSorted((a, b) => b - a),
+				`${group.language} rows descend by coverage`
+			);
+			for (const row of group.rows) {
+				assert.isAbove(row.files_total, 0, `${group.language}/${row.name} total`);
+				assert.isAtLeast(row.coverage_fraction, 0);
+				assert.isAtMost(row.coverage_fraction, 1);
+				// engine-level rows only — binding/materialization variants are folded
+				assert.notMatch(row.name, /-internal|wasm-|-wasm/, `${group.language}/${row.name}`);
+			}
+		}
+	});
+
+	test('coverage percent floors — only exact totality reads 100%', () => {
+		// 44219/44220 rounds to 100.00% but must not display as it: floor, so a
+		// visibly non-total count never sits beside a "100.00%" label.
+		assert.strictEqual(format_coverage_percent(44_219 / 44_220), '99.99%');
+		assert.strictEqual(format_coverage_percent(1), '100.00%');
+		assert.strictEqual(format_coverage_percent(0.998549), '99.85%');
+		assert.strictEqual(format_coverage_percent(0), '0.00%');
+	});
+});
+
+describe('derive_corpus_repos', () => {
+	test('maps the committed corpus sources to deduped org/name repo links', () => {
+		const repos = derive_corpus_repos(benchmarks_json.corpus_sources);
+		assert.isNotEmpty(repos);
+		// one entry per URL — no repo appears twice even though svelte.dev contributes
+		// several source subpaths
+		const urls = repos.map((r) => r.url);
+		assert.strictEqual(new Set(urls).size, urls.length, 'urls are distinct');
+		const svelte_dev = repos.filter((r) => r.url === 'https://github.com/sveltejs/svelte.dev');
+		assert.strictEqual(svelte_dev.length, 1, 'svelte.dev collapses to one entry');
+		// each label is the linkified `org/name`, derived from (and ending) its URL
+		for (const repo of repos) {
+			assert.match(repo.label, /^[^/]+\/[^/]+$/, repo.url);
+			assert.isTrue(repo.url.endsWith(repo.label), `${repo.url} ends with ${repo.label}`);
+		}
+	});
+
+	test('collapses shared repos and drops sources with no mapped repo', () => {
+		const repos = derive_corpus_repos([
+			{ path: '../zzz/src', files: 1 },
+			{ path: '../svelte.dev/apps/svelte.dev/src', files: 1 },
+			{ path: '../svelte.dev/packages/repl/src', files: 1 }, // same repo → collapsed
+			{ path: 'benches/js/.cache/svelte_styles', files: 1 } // not a repo → dropped
+		]);
+		assert.deepStrictEqual(repos, [
+			{ url: 'https://github.com/fuzdev/zzz', label: 'fuzdev/zzz' },
+			{
+				url: 'https://github.com/sveltejs/svelte.dev',
+				label: 'sveltejs/svelte.dev'
+			}
+		]);
+	});
+
+	test('handles a missing corpus_sources field', () => {
+		assert.deepStrictEqual(derive_corpus_repos(undefined), []);
+	});
+});
+
+describe('format_speedup_signed', () => {
+	test('anchor-and-faster entries read as a plain multiple', () => {
+		assert.strictEqual(format_speedup_signed(1), '1.00x');
+		assert.strictEqual(format_speedup_signed(2.5), '2.50x');
+		assert.strictEqual(format_speedup_signed(12.3), '12.3x'); // >= 10 drops to one decimal
+	});
+
+	test('slower entries negate the reciprocal so the factor is directly legible', () => {
+		assert.strictEqual(format_speedup_signed(0.15), '-6.67x');
+		assert.strictEqual(format_speedup_signed(0.05), '-20.0x'); // >= 10 magnitude → one decimal
+		assert.strictEqual(format_speedup_signed(0.98), '-1.02x'); // near-parity sign flip
+	});
+});
+
+describe('compute_baseline_ratio', () => {
+	test('speed reads the anchor as the reference — faster entries exceed 1', () => {
+		// anchor 100ns; a 50ns entry is 2x faster, a 200ns entry is half the speed
+		assert.strictEqual(compute_baseline_ratio('speed', 50, 100), 2);
+		assert.strictEqual(compute_baseline_ratio('speed', 200, 100), 0.5);
+	});
+
+	test('size reads the anchor as the reference — bigger entries exceed 1', () => {
+		// anchor 100 bytes; a 300-byte build is 3x bigger, a 50-byte build is half
+		assert.strictEqual(compute_baseline_ratio('size', 300, 100), 3);
+		assert.strictEqual(compute_baseline_ratio('size', 50, 100), 0.5);
+	});
+});
+
+describe('order_cross_runtime_runtimes', () => {
+	test('reorders the report storage order to node-first display order', () => {
+		assert.deepStrictEqual(order_cross_runtime_runtimes(['deno', 'node', 'bun']), [
+			'node',
+			'deno',
+			'bun'
+		]);
+	});
+
+	test('anchors on the next runtime in display order when node is absent', () => {
+		assert.deepStrictEqual(order_cross_runtime_runtimes(['bun', 'deno']), ['deno', 'bun']);
+		assert.deepStrictEqual(order_cross_runtime_runtimes([]), []);
+	});
+});
+
+// Shape gate for the committed cross-runtime `benchmarks_cross_runtime.json` (the
+// bench composer's combined `report.json`) — a different, slimmer shape than the
+// per-runtime baseline, consumed by the Cross-runtime section.
+describe('benchmarks_cross_runtime.json shape', () => {
+	test('combined report carries the current version and kind', () => {
+		assert.isAtLeast(benchmarks_cross_runtime_json.version, 5);
+		assert.strictEqual(benchmarks_cross_runtime_json.kind, 'combined');
+		// the committed fixture must be same-vintage — if this trips, re-run every
+		// runtime and recompose rather than committing a mixed set (the site would
+		// show the unreliable-ratios warning banner)
+		assert.notStrictEqual(benchmarks_cross_runtime_json.mixed_vintage, true);
+	});
+
+	test('runtimes include the flagship and its cross-runtime peers', () => {
+		const { runtimes } = benchmarks_cross_runtime_json;
+		assert.include(runtimes, 'node'); // the flagship the headline view leads with
+		assert.include(runtimes, 'deno');
+		assert.include(runtimes, 'bun');
+	});
+
+	test('every group derives rows with the flagship runtime populated', () => {
+		const groups = derive_cross_runtime_groups(benchmarks_cross_runtime_json);
+		assert.isAtLeast(groups.length, 6); // format+parse × svelte/typescript/css
+		for (const group of groups) {
+			assert.isAbove(group.rows.length, 0, group.group);
+			for (const row of group.rows) {
+				assert.isNumber(row.ops_per_second.node, `${group.group}/${row.name} missing node ops`);
+				// ratios anchor on node (the display-order base, not the report's
+				// deno-first storage order), so node's own ratio is exactly 1
+				assert.strictEqual(row.ratio_vs_base.node, 1, `${group.group}/${row.name} node anchor`);
+			}
+		}
+	});
+});
+
+// Shape gate for the CLI report `benchmarks_cli.ts` derives from the generated
+// `benchmarks_formatters.json`. The generator parses prose, so a drifted heading
+// or scenario id in the harness's README would silently drop a scenario or its
+// `tsv` reference row and render an empty table rather than fail to typecheck.
+describe('benchmarks_cli shape', () => {
+	test('every scenario the page has prose for resolved to generated data', () => {
+		// a copy entry with no matching scenario id drops silently from the table
+		assert.deepEqual(
+			benchmarks_cli.scenarios.map((s) => s.key),
+			CLI_SCENARIO_KEYS
+		);
+	});
+
+	test('every scenario carries a tsv reference row with positive metrics', () => {
+		assert.isAtLeast(benchmarks_cli.scenarios.length, 1);
+		for (const scenario of benchmarks_cli.scenarios) {
+			// BenchmarksCli anchors every ratio on the tsv row; without it the table is empty
+			assert.ok(
+				scenario.results.some((r) => r.label === 'tsv'),
+				`${scenario.key} is missing its tsv row`
+			);
+			for (const r of scenario.results) {
+				assert.isAbove(r.wall_ms, 0, `${scenario.key}/${r.label} wall_ms`);
+				assert.isAbove(r.cpu_ms, 0, `${scenario.key}/${r.label} cpu_ms`);
+				// null is legal (a harness run without GNU time measures no memory), 0 is not
+				assert.ok(r.memory_mb === null || r.memory_mb > 0, `${scenario.key}/${r.label} memory_mb`);
+			}
+		}
+	});
+
+	test('the derived wall-clock ratios agree with hyperfine own summary', () => {
+		// The generated report carries the harness's own `Summary` ratios beside the
+		// raw timings. Recomputing them from the timings and comparing catches a
+		// misparse that would otherwise render plausible-but-wrong numbers.
+		for (const scenario of benchmarks_formatters_json.scenarios) {
+			assert.strictEqual(scenario.baseline, 'tsv', `${scenario.id} baseline`);
+			for (const speedup of scenario.speedups) {
+				const derived = cli_speedup_vs_tsv(
+					scenario.id,
+					CLI_LABELS[speedup.name] ?? speedup.name,
+					'wall_ms'
+				);
+				assert.isDefined(derived, `${scenario.id}/${speedup.name}`);
+				// hyperfine derives its summary from full-precision means but prints the
+				// timings rounded, so recomputing from the printed numbers lands within a
+				// fraction of a percent — wide enough for that, far too tight to hide a
+				// misparse (a wrong unit would be off by 1000x)
+				assert.closeTo(
+					derived,
+					speedup.ratio,
+					speedup.ratio * 0.01,
+					`${scenario.id}/${speedup.name}`
+				);
+			}
+		}
+	});
+
+	test('every formatter accepts the whole corpus, as the page claims', () => {
+		// The page's notes say the preflight parse check found nothing rejected, so
+		// no formatter is credited for skipping files. That's a claim about the data.
+		for (const scenario of benchmarks_formatters_json.scenarios) {
+			assert.isNotEmpty(scenario.preflight, `${scenario.id} ran no preflight`);
+			for (const entry of scenario.preflight) {
+				assert.strictEqual(entry.rejected, 0, `${scenario.id}/${entry.name} rejected files`);
+				assert.isFalse(entry.unavailable, `${scenario.id}/${entry.name} never launched`);
+			}
+		}
+	});
+});
+
+// The page's prose quotes ratios computed from the reports rather than
+// hand-written numbers, so a renamed entry or a dropped scenario would render
+// `—` mid-sentence instead of failing. These gate every pair the copy names.
+describe('prose ratios resolve', () => {
+	const IN_PROCESS_PAIRS: Array<[string, string, string]> = [
+		['format/typescript', 'oxfmt', 'tsv'],
+		['format/typescript', 'prettier', 'tsv'],
+		['format/typescript', 'biome-wasm', 'tsv_wasm'],
+		['format/svelte', 'prettier', 'tsv'],
+		['format/svelte', 'biome-wasm', 'tsv_wasm'],
+		['format/css', 'oxfmt', 'tsv'],
+		['format/css', 'biome-wasm', 'tsv_wasm'],
+		['parse/typescript', 'oxc-parser', 'tsv-json-no-locations']
+	];
+
+	test('every in-process pair the TLDR quotes is present and favors tsv', () => {
+		for (const [group, slower, faster] of IN_PROCESS_PAIRS) {
+			const ratio = benchmark_speedup(benchmarks_json, group, slower, faster);
+			assert.isDefined(ratio, `${group}: ${slower} vs ${faster}`);
+			assert.isAbove(ratio, 1, `${group}: ${slower} vs ${faster}`);
+		}
+	});
+
+	test('every CLI ratio the prose quotes is present', () => {
+		for (const [label, metric] of [
+			['oxfmt', 'wall_ms'],
+			['oxfmt', 'cpu_ms'],
+			['biome', 'wall_ms']
+		] as const) {
+			assert.isDefined(
+				cli_speedup_vs_tsv(CLI_TS_REPO_KEY, label, metric),
+				`${CLI_TS_REPO_KEY}: ${label} ${metric}`
+			);
+		}
+		assert.isDefined(cli_memory_ratio_range(CLI_TS_REPO_KEY));
+		assert.isDefined(cli_memory_ratio_range());
+	});
+
+	test('approximate formatting drops digits as the ratio grows', () => {
+		assert.strictEqual(format_ratio_approx(1.66), '1.7x');
+		assert.strictEqual(format_ratio_approx(26.241), '26x');
+		assert.strictEqual(format_ratio_approx(undefined), '—');
+		// floored at both ends so the claim never overstates either bound
+		assert.strictEqual(format_ratio_range(3.001, 9.89), '3–9x');
+	});
 });
diff --git a/src/test/formatter_benchmark_data.test.ts b/src/test/formatter_benchmark_data.test.ts
new file mode 100644
index 0000000..693daa1
--- /dev/null
+++ b/src/test/formatter_benchmark_data.test.ts
@@ -0,0 +1,164 @@
+import { assert, describe, test } from 'vitest';
+
+import { parse_formatter_benchmarks } from '$routes/docs/benchmarks/formatter_benchmark_data.ts';
+
+// A trimmed stand-in for the bench harness's README — one scenario tsv runs in,
+// one it sits out, plus the versions and machine lines below the results block.
+const readme = `# Benchmark
+
+<!-- BENCHMARK_RESULTS_START -->
+
+\`\`\`
+=========================================
+Benchmarking Large Single File
+=========================================
+
+Target: TypeScript compiler parser.ts (~540KB)
+- 2 warmup runs, 5 benchmark runs
+- Copy original before each run
+
+
+Preflight (per-formatter parse check):
+  biome: clean
+  oxfmt: 3 rejected
+  tsv: unavailable (command failed to launch)
+Benchmark 1: biome
+  Time (mean ± σ):      1.597 s ±  0.015 s    [User: 1.583 s, System: 0.846 s]
+  Range (min … max):    1.581 s …  1.614 s    5 runs
+
+Benchmark 2: tsv
+  Time (mean ± σ):     28.8 ms ±   0.7 ms    [User: 15.2 ms, System: 13.5 ms]
+  Range (min … max):    27.8 ms …  29.5 ms    5 runs
+
+Summary
+  tsv ran
+   55.41 ± 1.36 times faster than biome
+
+Memory Usage:
+  biome: 303.2 MB (min: 291.5 MB, max: 319.4 MB, 13.12 ± 0.62 times more than tsv)
+  tsv: 23.1 MB (min: 22.5 MB, max: 23.9 MB)
+
+Large single file benchmark complete!
+
+
+=========================================
+Benchmarking Mixed (embedded)
+=========================================
+
+Target: Storybook repository (mixed with embedded languages)
+- 1 warmup runs, 3 benchmark runs
+- Git reset before each run
+
+Benchmark 1: oxfmt
+  Time (mean ± σ):      7.832 s ±  0.209 s    [User: 82.370 s, System: 5.801 s]
+  Range (min … max):    7.622 s …  8.040 s    3 runs
+
+Mixed (embedded) benchmark complete!
+\`\`\`
+
+<!-- BENCHMARK_RESULTS_END -->
+
+## Versions
+
+- **Prettier**: 3.9.1
+- **Biome**: 2.5.1
+- **tsv**: 0.2.0
+
+_Measured on: Some CPU · 12 threads · linux x64 — the ratios below depend on the core count._
+`;
+
+describe('parse_formatter_benchmarks', () => {
+	test('keeps only the scenarios tsv runs in', () => {
+		const parsed = parse_formatter_benchmarks(readme);
+		assert.deepEqual(
+			parsed.scenarios.map((s) => s.id),
+			['large-single-file']
+		);
+	});
+
+	test('parses the machine and versions from below the results block', () => {
+		const parsed = parse_formatter_benchmarks(readme);
+		assert.equal(parsed.machine, 'Some CPU · 12 threads · linux x64');
+		assert.deepEqual(parsed.versions, { prettier: '3.9.1', biome: '2.5.1', tsv: '0.2.0' });
+	});
+
+	test('normalizes timings to milliseconds across units', () => {
+		const parsed = parse_formatter_benchmarks(readme);
+		const [biome, tsv] = parsed.scenarios[0]!.timings;
+		assert.deepEqual(biome, {
+			name: 'biome',
+			mean_ms: 1597,
+			stddev_ms: 15,
+			user_ms: 1583,
+			system_ms: 846,
+			min_ms: 1581,
+			max_ms: 1614
+		});
+		assert.equal(tsv!.mean_ms, 28.8);
+	});
+
+	test('parses the scenario header, preflight, speedups, and memory', () => {
+		const scenario = parse_formatter_benchmarks(readme).scenarios[0]!;
+		assert.equal(scenario.name, 'Large Single File');
+		assert.equal(scenario.target, 'TypeScript compiler parser.ts (~540KB)');
+		assert.equal(scenario.warmup_runs, 2);
+		assert.equal(scenario.benchmark_runs, 5);
+		assert.deepEqual(scenario.preflight, [
+			{ name: 'biome', rejected: 0, unavailable: false },
+			{ name: 'oxfmt', rejected: 3, unavailable: false },
+			{ name: 'tsv', rejected: 0, unavailable: true }
+		]);
+		assert.equal(scenario.baseline, 'tsv');
+		assert.deepEqual(scenario.speedups, [{ name: 'biome', ratio: 55.41, ratio_stddev: 1.36 }]);
+		// the lowest-memory formatter is the ratio baseline, so it carries no ratio
+		assert.deepEqual(scenario.memory, [
+			{
+				name: 'biome',
+				mean_mb: 303.2,
+				min_mb: 291.5,
+				max_mb: 319.4,
+				ratio: 13.12,
+				ratio_stddev: 0.62
+			},
+			{ name: 'tsv', mean_mb: 23.1, min_mb: 22.5, max_mb: 23.9 }
+		]);
+	});
+
+	// A README that's present but drifted must fail the gen task rather than quietly
+	// publishing stale or scenario-stripped numbers — only a MISSING readme is benign,
+	// and that's the caller's call, not the parser's.
+	test('throws when the results markers are missing', () => {
+		assert.throws(
+			() => parse_formatter_benchmarks('# Benchmark\n\nno results here\n'),
+			/no <!-- BENCHMARK_RESULTS_START/
+		);
+	});
+
+	test('throws when no scenario includes tsv', () => {
+		const without_tsv = readme.replace(/^Benchmark 2: tsv$/m, 'Benchmark 2: oxfmt');
+		assert.throws(() => parse_formatter_benchmarks(without_tsv), /no scenario includes a tsv row/);
+	});
+
+	test('throws when a scenario banner carries no parseable timings', () => {
+		const drifted = readme.replace(/^Benchmark \d+: /gm, 'Bench $&');
+		assert.throws(() => parse_formatter_benchmarks(drifted), /no parseable timings/);
+	});
+
+	test('throws when a present memory section yields no rows', () => {
+		const drifted = readme
+			.replace(/^ {2}biome: 303\.2 MB.*$/m, '  biome: 303.2 megabytes')
+			.replace(/^ {2}tsv: 23\.1 MB.*$/m, '  tsv: 23.1 megabytes');
+		assert.throws(() => parse_formatter_benchmarks(drifted), /unparseable memory section/);
+	});
+
+	test('throws when the machine line or tsv version is missing', () => {
+		assert.throws(
+			() => parse_formatter_benchmarks(readme.replace(/^_Measured on: .*$/m, '')),
+			/machine line/
+		);
+		assert.throws(
+			() => parse_formatter_benchmarks(readme.replace(/^- \*\*tsv\*\*: .*$/m, '')),
+			/no tsv version/
+		);
+	});
+});
diff --git a/svelte.config.js b/svelte.config.js
index 1fd7b37..98626fc 100644
--- a/svelte.config.js
+++ b/svelte.config.js
@@ -1,21 +1,23 @@
-import {vitePreprocess} from '@sveltejs/vite-plugin-svelte';
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte';
 import adapter from '@sveltejs/adapter-static';
-import {svelte_preprocess_mdz} from '@fuzdev/mdz/svelte_preprocess_mdz.js';
-import {svelte_preprocess_fuz_code} from '@fuzdev/fuz_code/svelte_preprocess_fuz_code.js';
-import {create_csp_directives} from '@fuzdev/fuz_ui/csp.js';
-import {csp_directives_of_fuzdev} from '@fuzdev/fuz_ui/csp_of_fuzdev.js';
-import {execSync} from 'node:child_process';
+import { svelte_preprocess_mdz } from '@fuzdev/mdz/svelte_preprocess_mdz.js';
+import { svelte_preprocess_fuz_code } from '@fuzdev/fuz_code/svelte_preprocess_fuz_code.js';
+import { create_csp_directives } from '@fuzdev/fuz_ui/csp.js';
+import { csp_directives_of_fuzdev } from '@fuzdev/fuz_ui/csp_of_fuzdev.js';
+import { execSync } from 'node:child_process';
 
 /** @type {import('@sveltejs/kit').Config} */
 export default {
 	preprocess: [svelte_preprocess_mdz(), svelte_preprocess_fuz_code(), vitePreprocess()],
-	compilerOptions: {runes: true},
-	vitePlugin: {inspector: true},
+	compilerOptions: { runes: true },
+	vitePlugin: { inspector: true },
 	kit: {
 		adapter: adapter(),
-		paths: {relative: false}, // use root-absolute paths for SSR path comparison: https://svelte.dev/docs/kit/configuration#paths
-		alias: {$routes: 'src/routes'},
-		version: {name: execSync('git rev-parse HEAD').toString().trim()},
-		csp: {directives: create_csp_directives({extend: [csp_directives_of_fuzdev]})},
-	},
+		paths: { relative: false }, // use root-absolute paths for SSR path comparison: https://svelte.dev/docs/kit/configuration#paths
+		alias: { $routes: 'src/routes' },
+		version: { name: execSync('git rev-parse HEAD').toString().trim() },
+		csp: {
+			directives: create_csp_directives({ extend: [csp_directives_of_fuzdev] })
+		}
+	}
 };
diff --git a/vite.config.ts b/vite.config.ts
index 677e6eb..d8068bf 100644
--- a/vite.config.ts
+++ b/vite.config.ts
@@ -1,10 +1,10 @@
-import {defineConfig} from 'vite';
-import {sveltekit} from '@sveltejs/kit/vite';
-import {vite_plugin_fuz_css} from '@fuzdev/fuz_css/vite_plugin_fuz_css.ts';
+import { defineConfig } from 'vite';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { vite_plugin_fuz_css } from '@fuzdev/fuz_css/vite_plugin_fuz_css.ts';
 import svelte_docinfo from 'svelte-docinfo/vite.js';
-import {vite_plugin_pkg_json} from '@fuzdev/fuz_ui/vite_plugin_pkg_json.ts';
+import { vite_plugin_pkg_json } from '@fuzdev/fuz_ui/vite_plugin_pkg_json.ts';
 
 export default defineConfig({
 	plugins: [sveltekit(), svelte_docinfo(), vite_plugin_fuz_css(), vite_plugin_pkg_json()],
-	optimizeDeps: {exclude: ['@fuzdev/blake3_wasm', '@fuzdev/tsv_wasm']},
+	optimizeDeps: { exclude: ['@fuzdev/blake3_wasm', '@fuzdev/tsv_wasm'] }
 });