Contributor Harnesses

Reference examples of role directives and formula overlays that contributors and operators can drop into their own Gas Town setup to customize agent behavior — without patching the framework.

These examples are not active by default. They are starting points you copy into your own ~/gt/<rig>/directives/ or ~/gt/<rig>/formula-overlays/ directory and adapt to your rig's needs.

See docs/design/directives-and-overlays.md for the design of the extension surface (how directives and overlays are loaded, injection points, precedence, validation). The canonical prime-time reference is ~/gt/docs/PRIMING.md § "Role Directives and Formula Overlays".

Available harnesses

Harness	What it does
`polecat-pr-flow/`	Makes polecats open a GitHub PR for their branch before running `gt done`. For rigs that use a PR-review workflow instead of the canonical Refinery merge-queue flow.

Scope

Each harness is intentionally small and focused — enough to show the shape of a directive or overlay without covering every edge case. You are expected to read it, copy it, and adapt it.

Harnesses do not:

Modify Go source or formula source-of-truth files
Change default agent behavior for anyone who hasn't opted in
Replace gt doctor validation — run gt doctor after installing to confirm overlays are healthy

Contributing a new harness

If you've built a directive or overlay that other operators might want, open a PR adding a new directory here with:

README.md — what it does, how to install, how to verify it's active
The directive (<role>.md) and/or overlay (<formula>.toml) files
Keep it short. A harness is a worked example, not a complete product.