Spec-Driven Development

Feature development in phases. Light by default; weight only where the change pays for it. Rigor comes from a reader with a different source of evidence — the audit reads the diff and the tests against the contract, which no pass over the artifact alone can do — never from adding one more gate over the same text.

Triggers

• Specify ("plan feature", "spec this", "from PRD", "modify feature", "discuss how to build") → specify.md
• Design ("design this feature", "technical design", "plan the build") → design.md
• Tasks ("create tasks", "break into tasks", "task breakdown") → tasks.md
• Implement ("implement task T-1", "implement T-1 to T-4", "implement slice S-1", "implement wave W-1", "execute tasks", "implement everything") → implement.md
• Audit ("audit feature", "validate goals", "verify before PR") → audit.md
• Validate / UAT ("run UAT", "manual testing", "validate flows") → validate.md
• Archive ("archive feature", "archive this spec") → archive.md

Workflow