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Olivier Dupont e8ad489f36 Initial commit — Antigravity plugin v0.1.0

Plugin Claude Code miroir du plugin codex officiel d'OpenAI, mais
pour Google Antigravity (agy CLI). Headless via:

  agy --print --dangerously-skip-permissions --print-timeout 10m

Includes:
- 1 forwarder agent (antigravity-rescue)
- 5 slash commands (setup, rescue, status, result, cancel)
- 3 internal skills (cli-runtime, result-handling, gemini-prompting)
- agy-companion.mjs runtime (task / setup / status / result / cancel)
- marketplace.json for `/plugin marketplace add`

Tested: setup OK, foreground task OK, background workflow OK
(except OAuth refresh which requires interactive TTY).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

2026-05-19 23:57:41 +02:00

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name, description, user-invocable

name	description	user-invocable
gemini-prompting	Internal guidance for composing Antigravity (Gemini) prompts for coding, review, diagnosis, and research tasks inside the Antigravity Claude Code plugin	false

Prompting Gemini through Antigravity

Antigravity wraps Google's Gemini model in a CLI. The model is verbose by default and tends to over-explain. To get great rescue/task output, follow these rules.

1. Be explicit and structured

Gemini works better when the request is well-structured. Use a header + numbered steps when possible:

TASK
Investigate why <X> fails on macOS but works on Linux.

CONTEXT
- Reproduces with `npm test` in /Users/.../my-project
- Failing test: src/utils.test.ts → "should hash file"
- Suspected root cause: BSD `sha256sum` not installed on macOS

WHAT I WANT
1. Root-cause confirmation (read the code, run the failing test if possible)
2. Concrete fix (with file diff)
3. Verification command

2. Tell it what NOT to do

Gemini tends to add tons of context, options, and alternatives. To keep responses tight:

CONSTRAINTS
- Do not propose multiple solutions — pick the best one.
- Do not explain what the code does at length. Focus on the fix.
- Do not write a README/CHANGELOG/migration guide.
- Output max 200 words of prose + the diff.

3. Provide file paths explicitly

Gemini has its own scratch workspace at ~/.gemini/antigravity-cli/scratch/. To make it work on the user's actual repo, always provide absolute paths in the prompt:

Work in /Users/olivierdupont/Desktop/diversclaude/my-project/
Read src/utils.ts and src/utils.test.ts.
Apply the fix to src/utils.ts.

If the path is outside the default workspace, add the routing flag --add-dir /path/to/project.

4. Diagnosis vs. fix

Distinguish clearly between:

Diagnosis: "Investigate and report. No edits."
Fix: "Apply the fix directly to the files."
Plan: "Write a plan but don't execute it."

Default behavior of --dangerously-skip-permissions is to allow file edits. If you want read-only behavior, say so explicitly in the prompt.

5. Resume vs. fresh

Gemini's --continue flag resumes the most recent session. Use it (via the runtime's --resume flag) when:

Following up on a previous rescue
Iterating on a draft fix
Asking for more depth on the same investigation

Use a fresh session when:

Completely new task, unrelated to previous
The previous context is stale or wrong-headed

6. Antipatterns

Vague: "Fix this bug" — what bug? where?
Too many sub-tasks: keep one focused task per task call.
Asking for opinions: Gemini's opinions are bland — ask for actions.
Trusting blindly: ALWAYS read the resulting diff before committing.

7. Recommended boilerplate

TASK: <one-sentence outcome>

CONTEXT:
<3-8 bullets of what's known, file paths, what's been tried>

DELIVERABLE:
<file diffs, verification command, or specific answer>

CONSTRAINTS:
- Output max <N> lines.
- Do not modify files outside <list>.
- Do not refactor anything outside the immediate fix.

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