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[PR #6882] feat: add build-checkpointer skill #5373

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opened 2026-02-20 17:51:37 -05:00 by yindo · 0 comments
yindo commented 2026-02-20 17:51:37 -05:00
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Original Pull Request: https://github.com/langchain-ai/langgraph/pull/6882

State: open
Merged: No

Summary

  • Adds a Claude Code skill (.claude/skills/build-checkpointer/) that guides building conformant LangGraph checkpoint savers for any storage backend
  • Covers SQL, document store, and key-value store patterns with backend-agnostic guidance
  • Includes interface reference, critical contracts (common failure points), and SQLite implementation patterns
  • References the conformance test suite for validation

Files

  • SKILL.md — main skill entry point with 5-step workflow
  • interface-reference.md — method signatures, data structures, schema design by backend type
  • critical-contracts.md — 9 requirements most likely to cause test failures
  • sqlite-reference.md — working patterns from the simplest correct implementation

Test plan

  • Read all 4 files and verify no SQL-specific pattern is presented as the default
  • Verify the skill can be invoked via /build-checkpointer <backend>

🤖 Generated with Claude Code

**Original Pull Request:** https://github.com/langchain-ai/langgraph/pull/6882 **State:** open **Merged:** No --- ## Summary - Adds a Claude Code skill (`.claude/skills/build-checkpointer/`) that guides building conformant LangGraph checkpoint savers for any storage backend - Covers SQL, document store, and key-value store patterns with backend-agnostic guidance - Includes interface reference, critical contracts (common failure points), and SQLite implementation patterns - References the conformance test suite for validation ## Files - `SKILL.md` — main skill entry point with 5-step workflow - `interface-reference.md` — method signatures, data structures, schema design by backend type - `critical-contracts.md` — 9 requirements most likely to cause test failures - `sqlite-reference.md` — working patterns from the simplest correct implementation ## Test plan - [ ] Read all 4 files and verify no SQL-specific pattern is presented as the default - [ ] Verify the skill can be invoked via `/build-checkpointer <backend>` 🤖 Generated with [Claude Code](https://claude.com/claude-code)
yindo added the pull-request label 2026-02-20 17:51:37 -05:00
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Reference: langchain-ai/langgraph#5373
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