groovy

name	groovy
description	This skill is the **AI-tooling layer** over the project's fix Use when this capability is needed.
metadata	{"author":"apache"}

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name: groovy-fix-workflow description: AI-tooling guardrails for fixing a JIRA-tracked GROOVY bug — points at the project's fix workflow in CONTRIBUTING.md (failing-test-first ordering, scope discipline, commit reference, IDE-vs-build pitfalls), then adds the AI-specific constraints on top: no autonomous PR opening, no JIRA comments on the project's behalf, no merges, no editing someone else's commit message, no sibling-repo edits without committer flag. Use when implementing a fix after triage has identified a real defect and pointed at an area. license: Apache-2.0 compatibility: claude, codex, copilot, cursor, gemini, aider metadata: audience: contributors to apache/groovy scope: ai-tooling-fix-workflow-guardrails

Groovy fix workflow

This skill is the AI-tooling layer over the project's fix workflow. The workflow itself — test first, fail on master, smallest fix, targeted run green, module run green, scope discipline, commit with GROOVY-NNNNN reference — lives in CONTRIBUTING.md's "Fix workflow" section. This skill cites it and adds the AI-specific guardrails: a hand-back contract that keeps PR opening, JIRA comments, workflow transitions, and merges in committer hands, and the small set of mistakes AI tooling specifically tends to make.

• groovy-triage — predecessor; produces the reproducer + area pointer this skill builds on.
• groovy-tests — owns regression-test placement and naming.
• groovy-jira — AI guardrails for the GROOVY-NNNNN: … commit reference and any JIRA touch on the way through.
• Area depth: load groovy-internals, groovy-build, or groovysh for the codebase the fix touches.
• CONTRIBUTING.md — the canonical source for the fix workflow this skill cites; load alongside.

When to use this skill

Use it for:

• Implementing a fix for a JIRA-tracked Groovy bug, where triage has already produced a reproducer and pointed at an area.
• Preparing a clean, focused branch and commit for a human to land — including a fix you intend to submit yourself as a contributor.

Don't use it for:

• First-pass investigation of a fresh report — that's groovy-triage.
• Pure test work without a paired production change — that's groovy-tests on its own.
• Build / packaging changes — groovy-build is the workflow for those; the TDD shape applies less directly.
• Documentation-only fixes where there is no behavioural change to test.
• Security-sensitive fixes. Suspected vulnerabilities are reported privately per SECURITY.md; the fix is prepared privately and lands through a different channel.

Read first

• CONTRIBUTING.md "Fix workflow" — the canonical TDD ordering and scope discipline; the skill restates only what AI tooling specifically needs.
• CONTRIBUTING.md "Regression tests for JIRA fixes" — companion section on test shape and placement.
• AGENTS.md — ASF licensing / provenance, Assisted-by: trailer policy, the "what not to do" list.

Top failure modes

These are the recurring mistakes AI tooling specifically makes when implementing a fix:

1. Hallucinated identifiers. AI tooling reaches for plausible method or flag names that don't exist or have been renamed. git grep the identifier in the working tree before depending on it. If it isn't there, it isn't there.

2. Read-only research mistaken for a green build. A research subagent or an Explore pass can map code and surface call sites; it cannot tell you the fix works. The fix only counts when the targeted Gradle invocation passes against the working-tree change.

3. Pushing to someone else's branch, or auto-opening a PR. The hand-back contract (below) is firm: even when the fix is complete and clean, the agent does not open a PR, comment on the JIRA, self-assign, or transition workflow state without explicit instruction. See Proposing a workflow transition in groovy-jira.

4. Writing an Assisted-by: trailer on someone else's commit. The trailer is the contributor's call on a commit they author (AGENTS.md). If you are the contributor, follow the AGENTS.md policy; if you are preparing a change for someone else to commit, leave their commit message alone.

5. Quietly cloning and editing a sibling repo. Some fixes touch groovy-website, groovy-eclipse, or another ASF repo. Those have their own conventions, reviewers, and ICLA requirements; don't auto-clone and patch. Flag the cross-repo need in the hand-back artefact and let a committer decide.

6. Treating a green build as license to publish. The build going green is the floor, not the ceiling. Scope discipline, regression-test quality, and the hand-back contract all still apply. A clean diff a committer can read in two minutes beats a sprawling one they have to unpick.

7. Reaching for the symptom-fix when the cause is a frame up. The reproducer throws NullPointerException at line N; the patch adds a null guard at line N. Sometimes correct, often not — the null may indicate earlier state the surrounding code assumed was populated. Trace one or two frames up before reaching for the local guard. Pair with the area skill for the cause-vs-symptom call.

8. The silent-broken-test trap. The regression test must be seen to fail on master before the production change — the TDD ordering in . AI tooling routinely writes the test and the fix together, never observes the red, and ships a test that passes for the wrong reason (asserts current behaviour, guards the wrong path). A "fix" whose test would still pass with the production change reverted proves nothing. Run the test against unmodified first; if it doesn't fail, surface the gap and stop rather than proceeding.

Procedure

When triage has produced a reproducer and pointed at an area:

0. Pre-flight: branch and clean tree. git status -s should be clean (or the dirt explicitly acknowledged), and you should be on a fix branch, not the default branch. If on master, propose creating a branch before any commit — committing the fix onto the local master is a recurring AI mistake that makes the hand-back messy. The feature-branch requirement is project policy: see CONTRIBUTING.md.

1. Load the relevant area skill — groovy-internals for compiler/runtime, groovy-build for build/packaging, groovysh for the REPL. The area skill has the codebase-specific gotchas this skill deliberately doesn't repeat.

2. Follow the fix workflow in CONTRIBUTING.md — failing test on master first, smallest fix, targeted run green, module run green, scope check, commit with GROOVY-NNNNN: reference. Before finalising the commit body, scrub any language that reveals the security nature of a security-adjacent change (failure mode 11); describe the behaviour change neutrally.

3. Stop at the commit. Don't open a PR, post a JIRA comment, self-assign, transition workflow state, or push to anyone's branch on autopilot. Produce the hand-back artefact (below) and wait for explicit instruction.

Hand-back to a human

The AI-driven part of the workflow ends with a clean local branch and an artefact a committer can review in a few minutes. The agent does not:

• open a PR (draft or otherwise) without explicit instruction;
• post a JIRA comment on the issue;
• self-assign the JIRA, or transition its workflow state;
• push to a contributor's fork or branch on their behalf;
• merge anything.

With explicit instruction, the agent may:

• open a draft PR against apache/groovy (instruction must say "open a draft PR" — never on autopilot, never non-draft). Prefer gh pr create --web --draft so the human reviews the title, body, and any AI-provenance disclosure in the browser before the PR is actually submitted, rather than the agent pushing it non-interactively;
• post a prepared comment as a JIRA comment, where the human has reviewed the draft text first;
• run the build one more time on request.

The hand-back artefact is a short note (in the conversation, or as a branch description) containing:

• The JIRA key and one-line summary.
• The branch name and the local commit hash(es).
• The targeted Gradle command and its result.
• The module Gradle command and its result.
• If a reporter reproducer was run: the command and its result.
• The diff scope summary — files changed and a one-line "why each".
• Any cross-repo follow-up that's needed (flagged, not actioned).
• Any open questions for the committer.

A committer reading that note should be able to decide "open the PR and merge" or "needs another look at X" without having to re-run the investigation.

Validation checklist

Before producing the hand-back artefact:

• Fix workflow ordering observed (failing test on master first per CONTRIBUTING.md; targeted and module test runs green).
• Test follows CONTRIBUTING.md conventions: JUnit 5, naming (Groovy<NNNN> or // GROOVY-<NNNN> comment), correct tree.
• Working-tree diff contains only the test, the production change, and any directly-required edit. No drive-by reformat, stray imports, or speculative refactor.
• No new public API surface introduced unless the fix required it; if it did, COMPATIBILITY.md was consulted.
• Commit subject starts GROOVY-NNNNN: … (uppercase, no brackets, no prefix).
• If authoring as a contributor: Assisted-by: trailer follows the AGENTS.md policy; not added to anyone else's commit.
• Commit message / PR title / PR body do not reference the security nature of a security-adjacent change (neutral wording per AGENTS.md).
• No PR opened, JIRA comment posted, workflow transition proposed, or merge attempted on autopilot.
• Hand-back artefact lists branch, commit, gradle commands and outcomes, reproducer outcome, scope summary, and any cross-repo flag.

References

• CONTRIBUTING.md "Fix workflow" — the TDD ordering, scope discipline, and IDE-vs-build pitfalls.
• CONTRIBUTING.md "Regression tests for JIRA fixes" — test shape and placement.
• AGENTS.md — provenance and licensing, trailer policy, the "what not to do" list.
• COMPATIBILITY.md — observable API and runtime-behaviour boundaries.
• .agents/skills/groovy-triage/SKILL.md — predecessor; produces the triaged finding this skill builds on.
• .agents/skills/groovy-jira/SKILL.md — AI guardrails for JIRA references and field-touching.
• .agents/skills/groovy-tests/SKILL.md — regression-test placement and naming.
• .agents/skills/groovy-internals/SKILL.md, .agents/skills/groovy-build/SKILL.md, .agents/skills/groovysh/SKILL.md — area depth; pair with this skill on fixes in those areas.
• ASF Generative Tooling guidance: https://www.apache.org/legal/generative-tooling.html.

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Source: apache/groovy — distributed by TomeVault.