| verified | true |
| lastVerifiedAt | 2026-02-28 |
| name | omega-gemini-cli |
| description | Use when the user wants to use Google Gemini for analysis, large files or codebases, sandbox execution, or brainstorming. Uses headless Gemini CLI scripts (no MCP). Triggers on "use Gemini", "analyze with Gemini", "large file", "sandbox", "brainstorm with Gemini". |
| version | 2.0.0 |
| model | sonnet |
| invoked_by | both |
| user_invocable | true |
| tools | ["Bash","Read"] |
| best_practices | ["Always run verify-setup.mjs before first invocation to check CLI availability","Use stdin prompt delivery (built into ask-gemini.mjs) -- never pass prompt as positional arg directly to gemini CLI","For file review, embed file content in prompt text -- no dedicated --file flag exists","Use --json flag for machine-parseable output (wraps response in {\"response\":\"...\"} envelope)","Use --sandbox / -s flag for code execution tasks requiring isolated sandbox","Use --model gemini-2.5-flash or gemini-2.5-flash-lite to reduce quota/latency",{"Set user expectations":"simple queries ~2 min, large file/codebase review ~5-10 min"}] |
| error_handling | graceful |
| streaming | not_supported |
| source | builtin |
| trust_score | 100 |
| provenance_sha | 2c82246edc8159e1 |
Gemini CLI Skill
Headless wrapper for Google Gemini CLI. Sends prompts via stdin to gemini -p "" --yolo.
Free tier available — no API key required (Google OAuth only).
When to Use
- Get a Google Gemini perspective on any question
- Free-tier AI consultation (no API key costs)
- Code review from Gemini's model
- Brainstorming and analysis tasks
- Cross-validation of Claude's own responses
- Large files or codebases that benefit from Gemini's context window
- Sandbox execution (run/test code via Gemini)
Response Times
Gemini CLI runs as a subprocess and includes model startup time:
- Simple Q&A / news query: ~2 minutes
- Codebase or large-file review: ~5–10 minutes
Set expectations with the user before running long tasks.
Usage
Ask a question
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "What is the best caching strategy for a Node.js API?"
Specify model (short or long flag)
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "Explain async/await" --model gemini-2.5-flash
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "Explain async/await" -m gemini-2.5-flash
JSON output
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "List 5 design patterns" --json
Code sandbox (short or long flag)
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "Write and run a fibonacci function" --sandbox
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "Write and run a fibonacci function" -s
Stdin usage
echo "Explain recursion" | node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs
File review (embed content in prompt)
node .claude/skills/omega-gemini-cli/scripts/ask-gemini.mjs "Review this code: $(cat src/auth.ts)"
