deepseek-harness/packages/mode/README.md

mode/ — session-mode policy family

Session modes: named, logged, per-agent policy states, with plan mode as the first shipped definition. A single product package — there is no interface/implementation seam here, because a mode's variable parts are config values (section text, the access cap), not swappable implementations.

Package	Role	ctx key
mode/	mode/set vocabulary + fold, the ctx.modes service (list/get/set with the turn-boundary flush), the mode:policy guidance section, the access cap (a bash/resolve-mode clamp plus the cap-derived bash guards), and the model-facing exit_plan_mode review tool	ctx.modes

The mode in force is a pure function of the session log (SessionEventMap['mode/set'], last one wins), so resume and fork restore it with no extra machinery; the default mode is the absence of policy, keeping the plugin invisible until a mode is set. UIs read flips off session/event: the stdio front door exposes /mode, the ACP bridge maps the vocabulary to the session-mode picker. RFC: plan mode.