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The Checkpointer interface and implementations (Memory, File, Redis) were designed but never integrated into the Agent runtime. Store.snapshot already provides all the functionality needed for fork/resume operations. Removed: - src/core/checkpointer.ts (interface + MemoryCheckpointer) - src/core/checkpointers/ (FileCheckpointer, RedisCheckpointer) - tests/unit/core/checkpointer.test.ts Updated: - src/index.ts: removed Checkpointer exports - README.md: fixed example to use agent.snapshot() instead of agent.checkpoint() - docs/ROADMAP.md: replaced "Checkpointer" with "Snapshot/Fork" - tests/README.md: removed Checkpointer reference This removes ~500 lines of dead code without affecting any functionality. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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Summary
This PR performs a gentle cleanup of the codebase by removing the standalone
Checkpointermodule, whose functionality is already fully covered by the existingStore.snapshotsystem.Background
During our architecture review, we noticed that the
Checkpointerinterface (withMemoryCheckpointer,FileCheckpointer, andRedisCheckpointerimplementations) was designed but never actually integrated into theAgentruntime. TheAgentclass usesStore.saveSnapshot()andStore.loadSnapshot()directly for all snapshot/fork operations.What's Changed
src/core/checkpointer.tsandsrc/core/checkpointers/directorysrc/index.tssnapshot()instead ofcheckpoint())Why This is Safe
Store.saveSnapshot()✓Store.loadSnapshot()✓Store.listSnapshots()✓Agent.fork()uses Store directly ✓Benefits
Test Results
This cleanup was identified during our SDK architecture review. The
Storeinterface already provides a well-designed snapshot system that serves all current needs.