Phase Contract (internal)

The one authoritative owner of phase shape for this workflow. Planners lint every phase they emit against the eight rules below; execute-phase re-checks the same rules before any edit. Nothing else may define what a valid phase is — including which grammar a phase is written in.

When to use

• The lane's plan step — lint every phase before emission.
• execute-phase — phase-lint pre-flight guard before editing a phase.
• Templates store the contract version + fingerprint + lint result, never the eight rules (they point here).

The eight phase-lint rules

Every implementation phase must pass all 8 boxes before it is emitted (planner skills) or executed (execute-phase pre-flight). Fail-closed: any unticked box blocks emission/execution until the phase is re-cut or split.