Assertion narrows from ['asked', 'plan_ready'] to 'asked' only. Reaching
plan_ready first means the agent skipped Step 0 entirely and went
straight to ExitPlanMode — the regression we want to catch.
Why plan-ceo is special: unlike plan-eng / plan-design / plan-devex
(whose smokes legitimately reach plan_ready on certain branches without
asking), plan-ceo-review's template mandates Step 0A premise challenge
plus Step 0F mode selection BEFORE any plan write. There is no
legitimate path to plan_ready that does not first emit a skill-question
numbered prompt.
Failure message now branches on outcome (plan_ready vs timeout vs
silent_write) with a tailored diagnosis line per case. References the
skill template by section name ("Step 0 STOP rules", "One issue = one
AskUserQuestion call") instead of line numbers, so it survives template
edits.
Passes env: { QUESTION_TUNING: 'false', EXPLAIN_LEVEL: 'default' }
through the runner. Today this is advisory — gstack-config reads only
~/.gstack/config.yaml, not env vars — but the wiring is in place for a
future change. Documented honestly in the docstring.
Verified across 4 PTY runs: 3 pre-refactor + 1 post-refactor, all PASS.
Garry Tan
f290448f71