diff --git a/.github/workflows/platform-smoke.yml b/.github/workflows/platform-smoke.yml
new file mode 100644
index 0000000..537b000
--- /dev/null
+++ b/.github/workflows/platform-smoke.yml
@@ -0,0 +1,63 @@
+name: Platform Package Smoke
+
+on:
+  pull_request:
+    paths:
+      - "package.json"
+      - "bun.lock"
+      - "tsconfig.json"
+      - "src/**"
+      - "scripts/native-deps-smoke.mjs"
+      - "scripts/smoke-test.mjs"
+      - "scripts/copy-web-assets.mjs"
+      - ".github/workflows/platform-smoke.yml"
+  workflow_dispatch:
+
+jobs:
+  package-smoke:
+    name: ${{ matrix.os }} / package smoke
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - windows-latest
+          - macos-13
+          - macos-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "24"
+
+      - name: Install source dependencies
+        run: bun install
+
+      - name: Build package artifacts
+        run: bun run build
+
+      - name: Pack and install published package shape
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          pack_dir="$RUNNER_TEMP/opencode-mem-pack"
+          smoke_dir="$RUNNER_TEMP/opencode-mem-smoke"
+          mkdir -p "$pack_dir" "$smoke_dir"
+
+          npm pack --pack-destination "$pack_dir"
+          tarball_path=$(find "$pack_dir" -name "opencode-mem-*.tgz" -print -quit)
+          test -n "$tarball_path"
+
+          cd "$smoke_dir"
+          npm init -y
+          npm install --ignore-scripts "$tarball_path"
+          cp "$GITHUB_WORKSPACE/scripts/native-deps-smoke.mjs" ./native-deps-smoke.mjs
+          cp "$GITHUB_WORKSPACE/scripts/smoke-test.mjs" ./smoke-test.mjs
+          node ./native-deps-smoke.mjs
+          node ./smoke-test.mjs
diff --git a/package.json b/package.json
index c3ac42c..a2582a1 100644
--- a/package.json
+++ b/package.json
@@ -51,10 +51,16 @@
     "@opencode-ai/sdk": "^1.3.0",
     "franc-min": "^6.2.0",
     "iso-639-3": "^3.0.1",
-    "usearch": "^2.21.4",
     "zod": "^4.3.6",
     "@huggingface/transformers": "^4.2.0"
   },
+  "optionalDependencies": {
+    "usearch": "^2.21.4"
+  },
+  "//": "Remove onnxruntime-node override after https://github.com/microsoft/onnxruntime/issues/27961 is resolved",
+  "overrides": {
+    "onnxruntime-node": "1.22.0"
+  },
   "devDependencies": {
     "@types/bun": "^1.3.8",
     "husky": "^9.1.7",
diff --git a/scripts/native-deps-smoke.mjs b/scripts/native-deps-smoke.mjs
new file mode 100644
index 0000000..d527f98
--- /dev/null
+++ b/scripts/native-deps-smoke.mjs
@@ -0,0 +1,242 @@
+import { existsSync, readdirSync, readFileSync } from "node:fs";
+import { createRequire } from "node:module";
+import { basename, join, relative, sep } from "node:path";
+import { pathToFileURL } from "node:url";
+
+const requireFromHere = createRequire(import.meta.url);
+const projectRoot = process.cwd();
+const lockfilePath = join(projectRoot, "package-lock.json");
+const artifactPattern = /(?:\.node|\.dll|\.dylib|\.so(?:\.\d+)*)$/;
+const nativeScriptPattern =
+  /node-gyp|node-gyp-build|node-pre-gyp|prebuild|prebuild-install|cmake-js|install\/check|node\s+.*install/i;
+const nativeDependencyPattern =
+  /node-gyp|node-gyp-build|node-pre-gyp|prebuild|prebuild-install|cmake-js|node-addon-api|detect-libc|napi-build-utils/i;
+const platformPackagePattern =
+  /(^|[-_/])(win32|windows|linux|darwin|macos|x64|arm64|ia32|musl|glibc)([-_/]|$)/i;
+
+function readJson(path) {
+  return JSON.parse(readFileSync(path, "utf8"));
+}
+
+function getPackageNameFromLockPath(lockPath) {
+  const parts = lockPath.split("/");
+  const nodeModulesIndex = parts.lastIndexOf("node_modules");
+  if (nodeModulesIndex === -1) return null;
+  const first = parts[nodeModulesIndex + 1];
+  if (!first) return null;
+  if (first.startsWith("@")) {
+    const second = parts[nodeModulesIndex + 2];
+    return second ? `${first}/${second}` : null;
+  }
+  return first;
+}
+
+function getLockPathForPackage(name) {
+  return `node_modules/${name}`;
+}
+
+function isPlatformCompatible(pkg) {
+  return (
+    matchesSelectorList(pkg.os, process.platform) && matchesSelectorList(pkg.cpu, process.arch)
+  );
+}
+
+function matchesSelectorList(selectors, current) {
+  if (!Array.isArray(selectors) || selectors.length === 0) return true;
+  const positives = selectors.filter((selector) => !selector.startsWith("!"));
+  const negatives = selectors
+    .filter((selector) => selector.startsWith("!"))
+    .map((selector) => selector.slice(1));
+  if (negatives.includes(current)) return false;
+  return positives.length === 0 || positives.includes(current);
+}
+
+function collectRuntimeClosure(lockfile) {
+  const packages = lockfile.packages ?? {};
+  const root = packages[getLockPathForPackage("opencode-mem")];
+  if (!root) {
+    throw new Error("Installed opencode-mem package not found in package-lock.json");
+  }
+
+  const queue = ["opencode-mem"];
+  const seen = new Set();
+
+  while (queue.length > 0) {
+    const name = queue.shift();
+    if (!name || seen.has(name)) continue;
+    seen.add(name);
+
+    const entry = packages[getLockPathForPackage(name)];
+    if (!entry) continue;
+    for (const dependencyName of Object.keys(entry.dependencies ?? {})) queue.push(dependencyName);
+    for (const dependencyName of Object.keys(entry.optionalDependencies ?? {}))
+      queue.push(dependencyName);
+  }
+
+  return [...seen]
+    .map((name) => ({
+      name,
+      lockPath: getLockPathForPackage(name),
+      lockEntry: packages[getLockPathForPackage(name)],
+    }))
+    .filter((entry) => entry.lockEntry);
+}
+
+function findPackageDir(lockPath) {
+  const packageDir = join(projectRoot, ...lockPath.split("/"));
+  return existsSync(join(packageDir, "package.json")) ? packageDir : null;
+}
+
+function discoverArtifacts(packageDir) {
+  const artifacts = [];
+  const stack = [packageDir];
+  let visited = 0;
+
+  while (stack.length > 0 && visited < 2000) {
+    const current = stack.pop();
+    if (!current) continue;
+    visited += 1;
+
+    for (const entry of readdirSync(current, { withFileTypes: true })) {
+      if (entry.name === ".git" || entry.name === "node_modules") continue;
+      const fullPath = join(current, entry.name);
+      if (entry.isDirectory()) {
+        stack.push(fullPath);
+        continue;
+      }
+      if (artifactPattern.test(entry.name)) {
+        artifacts.push(relative(packageDir, fullPath).split(sep).join("/"));
+      }
+    }
+  }
+
+  return artifacts;
+}
+
+function classifyNativeCandidate(pkg, packageDir, artifacts) {
+  const reasons = [];
+  const scripts = pkg.scripts ?? {};
+  const dependencyNames = [
+    ...Object.keys(pkg.dependencies ?? {}),
+    ...Object.keys(pkg.optionalDependencies ?? {}),
+    ...Object.keys(pkg.peerDependencies ?? {}),
+  ];
+
+  if (pkg.gypfile === true) reasons.push("package.json gypfile=true");
+  if (pkg.binary) reasons.push("package.json binary field");
+  if (pkg.napi) reasons.push("package.json napi field");
+  for (const [scriptName, script] of Object.entries(scripts)) {
+    if (
+      /^(preinstall|install|postinstall)$/.test(scriptName) &&
+      nativeScriptPattern.test(String(script))
+    ) {
+      reasons.push(`${scriptName} script references native tooling`);
+    }
+  }
+  if (dependencyNames.some((name) => nativeDependencyPattern.test(name))) {
+    reasons.push("depends on native build/prebuild tooling");
+  }
+  if (
+    Object.keys(pkg.optionalDependencies ?? {}).some((name) => platformPackagePattern.test(name))
+  ) {
+    reasons.push("has platform-specific optional dependencies");
+  }
+  if (platformPackagePattern.test(pkg.name ?? basename(packageDir))) {
+    reasons.push("package name is platform-specific");
+  }
+  if (artifacts.length > 0) reasons.push("contains native binary artifacts");
+
+  return reasons;
+}
+
+function isPlatformArtifactPackage(pkg, artifacts) {
+  return platformPackagePattern.test(pkg.name ?? "") && artifacts.length > 0;
+}
+
+async function canLoadPackage(packageDir) {
+  try {
+    requireFromHere(packageDir);
+    return { ok: true, mode: "require" };
+  } catch (error) {
+    if (!(error instanceof Error) || error.code !== "ERR_REQUIRE_ESM") {
+      return { ok: false, mode: "require", error };
+    }
+  }
+
+  try {
+    await import(pathToFileURL(packageDir).href);
+    return { ok: true, mode: "import" };
+  } catch (error) {
+    return { ok: false, mode: "import", error };
+  }
+}
+
+function formatError(error) {
+  return error instanceof Error ? `${error.name}: ${error.message}` : String(error);
+}
+
+const lockfile = readJson(lockfilePath);
+const opencodeMemPkgPath = join(projectRoot, "node_modules", "opencode-mem", "package.json");
+const rootPkg = existsSync(opencodeMemPkgPath) ? readJson(opencodeMemPkgPath) : readJson(join(projectRoot, "package.json"));
+const candidates = [];
+const failures = [];
+
+for (const entry of collectRuntimeClosure(lockfile)) {
+  const packageDir = findPackageDir(entry.lockPath);
+  if (!packageDir) continue;
+
+  const pkg = readJson(join(packageDir, "package.json"));
+  if (!isPlatformCompatible(pkg)) continue;
+
+  const artifacts = discoverArtifacts(packageDir);
+  const reasons = classifyNativeCandidate(pkg, packageDir, artifacts);
+  if (reasons.length === 0) continue;
+
+  candidates.push({
+    name: pkg.name ?? getPackageNameFromLockPath(entry.lockPath),
+    packageDir,
+    pkg,
+    reasons,
+    artifacts,
+  });
+}
+
+if (candidates.length === 0) {
+  failures.push(
+    "No native dependency candidates were discovered in the opencode-mem runtime closure."
+  );
+}
+
+for (const candidate of candidates) {
+  const artifactOnly = isPlatformArtifactPackage(candidate.pkg, candidate.artifacts);
+  const load = artifactOnly
+    ? { ok: true, mode: "artifact-only" }
+    : await canLoadPackage(candidate.packageDir);
+  const artifactSummary = candidate.artifacts.length > 0 ? candidate.artifacts.join(", ") : "none";
+  const relativeDir = relative(projectRoot, candidate.packageDir).split(sep).join("/");
+
+  const isOptional = !!(
+    rootPkg.optionalDependencies && rootPkg.optionalDependencies[candidate.name]
+  );
+
+  console.log(
+    `${candidate.name}: ${load.ok ? `loaded via ${load.mode}` : "load failed"}${isOptional && !load.ok ? " (allowed for optional)" : ""}; artifacts=${artifactSummary}; reasons=${candidate.reasons.join("; ")}`
+  );
+
+  if (candidate.artifacts.length === 0 && !load.ok) {
+    const msg = `${candidate.name} at ${relativeDir} has native markers but no native artifacts and could not load: ${formatError(load.error)}`;
+    if (isOptional) console.log(`[WARN] ${msg}`);
+    else failures.push(msg);
+  }
+  if (candidate.artifacts.length > 0 && !load.ok) {
+    const msg = `${candidate.name} at ${relativeDir} has native artifacts but could not load on ${process.platform}/${process.arch}: ${formatError(load.error)}`;
+    if (isOptional) console.log(`[WARN] ${msg}`);
+    else failures.push(msg);
+  }
+}
+
+if (failures.length > 0) {
+  throw new Error(`Native dependency smoke failed:\n- ${failures.join("\n- ")}`);
+}
+
+console.log(`native dependency smoke test passed (${candidates.length} native candidates checked)`);
diff --git a/scripts/smoke-test.mjs b/scripts/smoke-test.mjs
new file mode 100644
index 0000000..c361da2
--- /dev/null
+++ b/scripts/smoke-test.mjs
@@ -0,0 +1,22 @@
+import assert from "node:assert/strict";
+
+const pluginModule = await import("opencode-mem");
+const tagsModule = await import("opencode-mem/tags");
+
+assert.equal(typeof pluginModule.default, "object", "default export must be a plugin object");
+assert.equal(pluginModule.default.id, "opencode-mem", "plugin id must match package name");
+assert.equal(typeof pluginModule.default.server, "function", "plugin server must be callable");
+
+assert.equal(typeof tagsModule.getTags, "function", "getTags export must be callable");
+assert.equal(
+  typeof tagsModule.getProjectTagInfo,
+  "function",
+  "getProjectTagInfo export must be callable"
+);
+assert.equal(
+  typeof tagsModule.getUserTagInfo,
+  "function",
+  "getUserTagInfo export must be callable"
+);
+
+console.log("opencode-mem package smoke test passed");