MakFly

Use PROACTIVELY when the user invokes /implement <slug> or asks "now build it / run the tasks / execute the plan". Runs the `implementer` subagent in a forked context which walks specs/<slug>/tasks.md and writes src/** + tests/** one task at a time, one commit per task.

Use PROACTIVELY when the user invokes /plan <slug> or asks "how should we build this". Runs the `planner` subagent in a forked context which writes specs/<slug>/plan.md from a clarified spec. Refuses to plan if spec.md is still `draft`.

Use PROACTIVELY after /plan, /tasks, or /implement completes — and any time the user invokes /review <slug> [artefact]. Runs both the `verifier` subagent (forked context, Claude-native) and codex (via `codex exec`) on the named artefact. Writes specs/<slug>/reviews/{verifier,codex}-<artefact>-<date>.md. Never edits the implementation.

Use PROACTIVELY when the user invokes /clarify <slug> or when a spec has Open questions and the user wants to resolve them. Reads specs/<slug>/spec.md §6, asks targeted questions, integrates answers, bumps Status to `clarified`.

Use PROACTIVELY when the user wants to author, amend, or revise memory/constitution.md (the supreme project contract). Triggers on /constitution and on phrases like "set the project principles", "redéfinis les principes", "what are our invariants". Never use during a feature flow (specify/plan/...) — pause the flow and explain.

Use PROACTIVELY when the user invokes /specify <slug> or asks to "write the spec", "define the feature", "what should we build". Runs the `specifier` subagent in a forked context which writes specs/<slug>/spec.md. Refuses to write code or plan.

Use PROACTIVELY when the user invokes /tasks <slug> or asks "break this plan into tasks". Runs the `decomposer` subagent in a forked context which writes specs/<slug>/tasks.md. Refuses if plan.md is still `draft`.