[arniber21]

Closes #13

Summary

• add the plain-fetch LangSmith API source and route native runs through the existing parser
• add cursor pagination, rate-limit backoff, deduplication, and encrypted resumable checkpoints
• enforce environment-only credentials, redirect confinement, secret redaction, and persistence guards
• document the exact LangSmith endpoints and methods

Verification

• bun test — 186 passed
• bun run build
• git diff --check
• independent standards and spec review passes

---

^{Need help on this PR? Tag @codesmith-bot with what you need. Autofix is disabled.}