feat: Persistent checkpoint & session history (Issue #72)#95
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Serialize checkpoints to disk and restore on extension restart. ### Changes - Add CheckpointStore class: filesystem persistence for checkpoints - Saves checkpoints as JSON files under .champ/checkpoints/ - Loads checkpoints on manager initialization - Handles Uint8Array serialization via base64 encoding - Gracefully skips corrupted files - Update CheckpointManager with persistence: - Constructor accepts optional storagePath parameter - Load checkpoints from disk on initialization via async loadFromDisk() - Save checkpoints to disk when created - Delete checkpoints from disk when restored or cleared - Maintain backward compatibility: clear() remains synchronous - Update extension.ts: - Initialize CheckpointManager with .champ/checkpoints storage path ### Testing - TDD: 9 new tests for CheckpointStore persistence - TDD: 6 new tests for CheckpointManager persistence - All 1283 tests pass (including new tests) - No breaking changes to existing functionality ### Acceptance Criteria - Checkpoints persist across extension restarts ✓ - Checkpoint state is restored from disk on initialization ✓ - Checkpoints are serialized to human-readable JSON files ✓ - Corrupted checkpoint files are skipped gracefully ✓ - Storage path is configurable (defaults to .champ/checkpoints) ✓ Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DLSvxucbfqMjup96KyKVyE
Resolves TypeScript noUnusedLocals error in PR #95 (Issue #64). The 'path' module was imported but never used. Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DLSvxucbfqMjup96KyKVyE
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Summary
Implements persistent checkpoint and session history restoration across extension restarts.
.champ/checkpoints/Implementation Details
New Files
src/checkpoints/checkpoint-store.ts: Filesystem persistence layer for checkpointstest/unit/checkpoints/checkpoint-store.test.ts: Comprehensive tests for checkpoint storageModified Files
src/checkpoints/checkpoint-manager.ts: Added persistence integrationstoragePathparameterloadFromDisk()on initializationwaitForLoad()method for testing/synchronizationsrc/extension.ts: Initialize CheckpointManager with storage pathtest/unit/checkpoints/checkpoint-manager.test.ts: Added 6 persistence testsTest Results
Acceptance Criteria
.champ/checkpoints/Testing
Run checkpoint tests:
npm test -- checkpointRun full test suite:
npm test🤖 Generated with Claude Code
https://claude.ai/code/session_01DLSvxucbfqMjup96KyKVyE