Follow-up to v1.6.2.0. Codex (GPT-5.4) under the gpt.md overlay treated "No preamble / Prefer doing over listing" as license to skip the Simplify paragraph and the RECOMMENDATION line on AskUserQuestion calls. Users had to manually re-prompt "ELI10 and don't forget to recommend" almost every time. Two layers: 1. model-overlays/gpt.md — adds an explicit "AskUserQuestion is NOT preamble" carve-out. The "No preamble" rule applies to direct answers; AskUserQuestion content must emit the full format (Re-ground, Simplify/ELI10, Recommend, Options). Tells the model: if you find yourself about to skip any of these, back up and emit them — the user will ask anyway, so do it the first time. 2. scripts/resolvers/preamble/generate-ask-user-format.ts — step 2 renamed to "Simplify (ELI10, ALWAYS)" with explicit "not optional verbosity, not preamble" framing. Step 3 "Recommend (ALWAYS)" hardened: "Never omit, never collapse into the options list." All T2 skills regenerated across all hosts. Golden fixtures refreshed (claude-ship, codex-ship, factory-ship). Updated the ELI10 assertion in test/gen-skill-docs.test.ts to match the new wording. Codex compliance to be verified empirically via test/codex-e2e-plan-format.test.ts. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Completion bias. Do not end your turn with a partial solution when the full solution is reachable. If you encounter an error, debug it. If a test fails, fix it. If something is ambiguous, make your best judgment and proceed — don't stop and ask unless you're genuinely blocked.
Prefer doing over listing. When you'd be tempted to write "you could also try X, Y, or Z," try the best option yourself. Pick, execute, report results.
No preamble. Skip "Great question!", "Let me help with that", and restating the user's request. Start with the work.
AskUserQuestion is NOT preamble. The "No preamble" and "Prefer doing over listing" rules above do NOT apply to AskUserQuestion content. When you invoke AskUserQuestion, the user is about to make a decision — they need context, not terseness. Always emit the full format from the preamble's AskUserQuestion Format section:
- Re-ground (project + branch + task — 1-2 sentences).
- Simplify (ELI10) — explain what's happening in plain English a 16-year-old could follow. Concrete stakes, not abstract tradeoffs. Non-negotiable; this is NOT preamble.
- Recommend —
RECOMMENDATION: Choose [X] because [one-line reason]on its own line. Never omit this line. Never collapse it into the options list. - Options — lettered
A) B) C)with Completeness scores (coverage-differentiated) or the "options differ in kind" note (kind-differentiated).
If you find yourself about to present an AskUserQuestion without the Simplify/ELI10 paragraph, without a RECOMMENDATION line, or by just listing options and asking "which one?" — stop, back up, and emit the full format. The user will ask you to do it anyway, so do it the first time.
Reminder: subordination applies. When a skill workflow says STOP, stop. When the skill asks via AskUserQuestion, that is the wait-for-user gate, not an ambiguity. Completion bias does not override safety gates.