name:: install-gate
description:: Scaffold the good-oss-citizen contribution gate into a consumer repository: a `pull_request_target` GitHub Actions check that fails any pull request whose description lacks a contribution declaration — an "AI Disclosure" section or an explicit "no AI assistance" statement — plus the vendored detection script, a PR template, and the tessl.json dependency entry. The gate enforces an outcome (AI use is disclosed) on the PR side, where it cannot be bypassed; it does not, and cannot, prove a tool ran. Use when a maintainer wants to add, install, set up, scaffold, enable, or wire up a contribution gate / a PR check that requires good-oss-citizen or AI-use disclosure before contributing.

Install Gate Skill

Name: tessl-labs/good-oss-citizen
Rating: 92.2 (1 reviews)
Author: tessl-labs

Process steps in order. Do not skip ahead.

This skill scaffolds the good-oss-citizen contribution gate into a consumer repository — each step depends on the previous one; do not parallelize.

Step 1 — Run Preflight Checks

.tessl/plugins/tessl-labs/good-oss-citizen/skills/install-gate/preflight.sh

Runs every precondition (git worktree, python3, GitHub CLI install + auth, installed-plugin templates, origin remote, local + remote branch clear) and returns one JSON object: {"ok": bool, "failures": [...], "warnings": [...]}.

Exit 0, empty failures — every precondition passed; proceed to Step 2.
Exit 1, populated failures — report each failure's reason verbatim and stop. Every failure carries a concrete recovery command.
Non-empty warnings — informational only; never affects ok or the exit code. Report each reason verbatim and remember it for Step 7's PR body. Do not stop; proceed to Step 2.

Step 2 — Refuse Overwrite

If either .github/workflows/contribution-gate.yml or .github/scripts/check_contribution_declaration.py already exists in the repo, stop and report that a gate is already installed. Do not overwrite either file — a partial prior install is deliberate state the skill must not destroy. An existing pull-request template is NOT a blocker: Step 4 leaves it in place and warns instead. If neither gate file exists, proceed immediately to Step 3.

Step 3 — Create Feature Branch

.tessl/plugins/tessl-labs/good-oss-citizen/skills/install-gate/branch.sh

Creates feat/add-good-oss-citizen-gate from origin's default branch (resolved from the remote, not the caller's current HEAD), and emits a JSON object {"state":"created|already-on-branch","branch":...,"base":...}. Idempotent: a no-op if already on the branch. Proceed immediately to Step 4.

Step 4 — Scaffold Gate Files

.tessl/plugins/tessl-labs/good-oss-citizen/skills/install-gate/scaffold.sh

Writes .github/workflows/contribution-gate.yml and the vendored .github/scripts/check_contribution_declaration.py, adds .github/PULL_REQUEST_TEMPLATE.md only when the repo has no PR template anywhere GitHub looks (otherwise it leaves the existing one and emits a warning), and ensures tessl.json declares the tessl-labs/good-oss-citizen dependency (created if absent, added if missing, never overwriting an existing pin). Atomic: it validates templates, version, and tessl.json parseability before writing anything, and rolls back every file it created (restoring tessl.json) if a later step fails — so a failed run never leaves a partial install for Step 2 to refuse on re-run. Emits a JSON summary with the written paths, the tessl_json state, and a warnings array; exits non-zero with a stderr diagnostic on failure. Remember any warnings for Step 7. Proceed immediately to Step 5.

Step 5 — Commit

.tessl/plugins/tessl-labs/good-oss-citizen/skills/install-gate/commit.sh

Stages the gate workflow, the vendored detector, tessl.json, and the PR template (only when scaffold created it) and commits with the canonical message ci(gate): add good-oss-citizen contribution gate. Idempotent: emits {"state": "no-op", …} when the working tree already matches a prior successful run. If a pre-commit hook rejects the commit, the script exits non-zero — fix the hook's finding and re-run; do not --no-verify. Proceed immediately to Step 6.

Step 6 — Push

.tessl/plugins/tessl-labs/good-oss-citizen/skills/install-gate/push.sh

Pushes feat/add-good-oss-citizen-gate to origin with upstream tracking. Idempotent: emits {"state": "up-to-date", …} if origin already matches local HEAD. Proceed immediately to Step 7.

Step 7 — Open PR

gh pr create with title ci(gate): add good-oss-citizen contribution gate and a body that follows the content blocks defined at:

.tessl/plugins/tessl-labs/good-oss-citizen/skills/install-gate/PR_BODY_TEMPLATE.md

Return the PR URL. If Step 1 or Step 4 emitted any warnings, surface them inline in your user-facing summary too (not only in the PR body) so the maintainer sees them immediately. The PR body MUST tell the maintainer to mark the gate's status check as a required check in branch protection — without that, the gate runs but does not block merges. Finish here — the maintainer reviews, marks the check required, acts on any warnings, and merges.