mb-harness — Harness engineering setup

• What it does: defines the execution harness around the repo, including commands, gates, and parallel-safe workflow.
• Use it when: the repository needs stronger agent guardrails before autonomous or multi-session work.
• Input: repository root and the project’s canonical build, test, and lint commands.
• Output: documented quality gates, optional Codex config, and a safer harness for agent execution.

Goal

Turn the repo into a reliable “harness” for agents:

• clear entry points (AGENTS.md)
• reproducible commands (build/test/lint)
• mechanical checks (CI + MB lint)
• parallel-safe workflow (worktrees)

Process