# Gemini CLI Runtime > Internal contract for calling gemini-companion runtime from Claude Code Use when this capability is needed. - Skill: `tomevault-io/gemini-cli-runtime-5` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/gemini-cli-runtime-5` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/gemini-cli-runtime-5/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/gemini-cli-runtime-5 --- # Gemini CLI Runtime Contract This skill defines how to call the `gemini-companion.mjs` runtime from Claude Code agents and commands. ## Primary entry point ```bash node "${CLAUDE_PLUGIN_ROOT}/scripts/gemini-companion.mjs" task "" ``` ## Rescue agent rules - One `Bash` call to `gemini-companion.mjs task`. Return stdout verbatim — no commentary. - Do NOT call `review`, `challenge`, `status`, `result`, or `cancel` from consult. - May use `gemini-prompting` skill ONLY to shape the prompt before forwarding. ## Flag handling | Flag | Behavior | |------|----------| | `--model ` | Passed through to companion; alias resolution happens inside | | `--effort ` | Reserved for future use (not yet supported by Gemini CLI) | | `--resume-last` | Resumes latest Gemini session thread | | `--write` | Enables write mode (`--yolo` inside companion) | | `--background` / `--wait` | Strip these — consult always runs foreground | | `--resume` / `--fresh` | Strip these routing flags; use `--resume-last` instead | ## Default behavior - Default `--write` unless user explicitly asks for read-only. - Do not add `--background` — consult runs synchronously. - Do not interpret or summarize Gemini output — return it verbatim. --- > Source: [arescope/gemini-plugin-cc](https://github.com/arescope/gemini-plugin-cc) — distributed by [TomeVault](https://tomevault.io).