What problem does it solve? Beginning work on a planned milestone involves many error-prone steps: verifying the spec is ready, promoting its status, cutting the right branch in the right order, and tracking acceptance criteria. This Skill orchestrates that entire start-of-milestone ritual so nothing is skipped or done out of sequence. ## Core Features & Use Cases - Preflight validation: Confirms the milestone spec exists with concrete, testable acceptance criteria, the parent epic is active with its branch checked out, and the build and tests are green before any work begins. - Ordered sovereign commits: Promotes the milestone to in_progress and optionally opens a delegated authorization scope on the parent epic branch before cutting the milestone branch, matching the kernel's branch-model sequencing rules. - TDD implementation loop: Drives each acceptance criterion through a red-green-refactor cycle, records phase transitions live, commits per-AC with structured trailers, and runs a readiness check before handoff to the wrap ritual. - Use Case: A developer says "start milestone M-0003" and the Skill verifies the spec, promotes the status, cuts the milestone branch, then iterates through each acceptance criterion with tests until the work is ready for independent review. ## Quick Start Ask the assistant to start milestone M-NNNN once its draft spec exists and the parent epic branch is checked out.
