_Kerman
4284530c7e
Prompt admission runs before any turn opens, so the agent/prompt-submit flush listener could only ever append plan/mode outside an open turn — invariant-vetoed and retried at agent/step when the session invariant is mounted, silently out-of-turn in the durable log when it is not. agent/step fires inside the open turn before every request derivation (including turn 1 step 1), so it is the sole flush point and no behavior is lost: a pending idle switch lands as the first step's in-turn plan/mode. Tests pin the new contract: admission never appends; the first step boundary flushes.
plan/ — plan collaboration state
Plan mode is one logged, per-agent collaboration state. It is a single product package, not a generic mode registry or a capability-seam trio.
| Package | Role | ctx key |
|---|---|---|
plan-mode/ |
plan/mode vocabulary + fold, boundary-applied state, the plan:policy guidance section, /plan [message] entry and /plan off exit, and the model-facing exit_plan_mode review tool |
ctx.planMode |
The active state is a pure function of the session log, so resume and fork restore it without extra machinery. The deployment supplies plan instructions through Cordis config, while exit_plan_mode stays registered when planning is inactive to keep the request tool catalog stable. ACP maps this capability onto its generic default / plan picker; sandbox mode and approval policy remain independent enforcement settings. Design: plan-mode Agent Note and plan-specific state simplification.