# Code Review — Step 3: Implement retries and structured errors

**Verdict:** APPROVE

## Findings

No blocking findings.

## Verification

- Reviewed `git diff 56e19bf..HEAD --name-only` and full diff.
- Read the changed test/status files plus the relevant intervals client implementation for context.
- Ran `go test ./internal/intervals` — passed.
- Ran `go test ./...` — passed.
- Ran `make lint` — passed with 0 issues.

## Notes

The added same-package tests exercise the private `doJSON` retry/error paths, covering the previous lint-cleanliness issue. They verify Basic Auth/User-Agent/path construction, retry behavior for 429/5xx, non-retry and classification for 404, secret/body redaction in error strings, and context cancellation during retry sleep.
