blueprint

Turn a one-line objective into a step-by-step construction plan that any coding agent can execute cold. Do not use for tasks completable in a single PR, fewer than 3 tool calls, or when the user says "just do it." Blueprint runs a 5-phase pipeline: Blueprint detects git/gh availability automatically. With git + GitHub CLI, it generates full branch/PR/CI workflow plans. Without them, it switches to direct mode (edit-in-place, no branches). Produces plans/myapp-migrate-database-to-postgresql.md with steps like: Produces a plan with parallel steps where possible (e.g., "implement Anthropic plugin" and "implement OpenAI plugin" run in parallel after the plugin interface step is done), model tier assignments (strongest for the interface design step, default for implementation), and invariants verified after every step (e.g., "all existing tests pass", "no provider imports in core"). This skill ships with Everything Claude Code. No separate installation is needed when ECC is installed. If you are working from the ECC repository checkout, verify the skill is present with: To update later, review the ECC diff before updating: If you are vendoring only this skill outside the full ECC install, copy the reviewed file from the ECC repository into ~/.claude/skills/blueprint/SKILL.md .