Summary

The interview auto-complete path correctly requires completion_candidate_streak >= 2 (two consecutive qualifying turns) before ending the interview. However, the explicit "done" path (when the user types "done") only checks qualifies_for_seed_completion() without any streak requirement, allowing premature interview completion on a single lucky low-ambiguity score.

Root Cause

# authoring_handlers.py — auto-complete path (line ~1028)
if (
    live_score is not None
    and qualifies_for_seed_completion(live_score, ...)
    and state.completion_candidate_streak >= AUTO_COMPLETE_STREAK_REQUIRED  # ✅ streak checked
):
    return await self._complete_interview_response(...)

# authoring_handlers.py — explicit done path (line ~947)
if exit_score is not None and qualifies_for_seed_completion(exit_score, ...):
    return await self._complete_interview_response(...)  # ❌ no streak check

Impact

• User can type "done" every turn until the ambiguity score happens to dip below threshold
• A single fluctuation produces an incomplete Seed that fails during execution
• Defeats the purpose of the streak requirement introduced in fix(interview): separate closure activation from auto-complete gating #342

Suggested Fix

Add a minimum streak check to the done path (at least streak >= 1), or use the same AUTO_COMPLETE_STREAK_REQUIRED gate.

Introduced In

v0.28.3 — commit b6e53ea (#342)