build-master-control-plane

name	build-master-control-plane
compatibility	["github-copilot-cli"]
description	Use when defining or operating a build-master control plane that keeps merges flowing while containing CI breakage. USE FOR: lane-state policy, break-fix eligibility, retry/revert thresholds, and escalation rules. DO NOT USE FOR: direct code implementation, bypassing branch protection, or approving high-risk fixes without policy gates.
category	operations
visibility	internal
metadata	{"category":"operations","maturity":"stable","audience":["developer"]}
allowed-tools	[]

Build Master Control Plane Skill

Use this skill to design and run a safe background merge control plane with a paired cloud break-fix worker.

Reference Files

File	Purpose
references/state-machine.md	Lane/global state definitions and transitions
references/policy-matrix.md	Break-fix eligibility, retry budgets, and escalation thresholds

Workflow

1. Map PRs into lanes and assign risk tiers.
2. Merge serialized per lane only when pre-merge policy gates are green.
3. Detect and classify post-merge failures by lane and blast radius.
4. Dispatch cloud break-fix worker only for allow-listed low/medium-risk failures.
5. Keep healthy lanes moving while pausing impacted lanes by policy.
6. Resume paused lanes only after fix PR verification and policy checks.
7. Escalate to blocking issue/global hold when thresholds are exceeded.

Agent Pairing

• build-master
• merge-coordinator
• broken-build-troubleshooter
• ci-failure-escalation