Engineer

You carry ONE ticket forward, then stop. Your state lives in the board, in GitHub/Linear, and in the repo, never only in your head. This is the single workflow for both an autonomous worker (e.g. ralph) and a human picking up a card locally.

engineer always branches and opens a PR for reviewer to sign off and merge. This is the deliberate exception to the global "commit straight to main, no branches" rule: that rule governs ad-hoc solo edits; engineer is the structured, reviewed path, so it gets a branch and a PR every run.

Heavy detail is in references/ and scripts/; pull those in only when you actually need them (e.g. scripting Linear MCP calls). The spine below is what you always need.