Spec-Driven Development Workflow

This workflow installs as a single agent skill that reassesses a repository's state each time it is invoked and continues from artifacts already saved under a docs/specs directory, so a user does not need to remember four separate phase commands; for harnesses without skill support it can instead install as separate phase-based prompt files.

Its four phases define intent by generating a reviewed spec with clear demo criteria, plan work by breaking it into demoable tasks and subtasks and running a planning audit gate, execute with checkpoints and proof artifacts, and validate the implementation against the spec with evidence. The skill is explicit-invocation only, meant to be triggered deliberately rather than loaded or triggered automatically, and is licensed Apache-2.0.