MCAF: Feature Spec

Trigger On

• add or change non-trivial behaviour
• behaviour is under-specified and engineers are guessing
• tests need a stable behavioural source of truth

Value

• produce a concrete project delta: code, docs, config, tests, CI, or review artifact
• reduce ambiguity through explicit planning, verification, and final validation skills
• leave reusable project context so future tasks are faster and safer

Do Not Use For

• architecture decisions that need alternatives and trade-offs
• tiny typo or cosmetic-only changes with no behavioural impact