Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add Gfriend997/gemini-companion/plugin install gemini-companionWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/gfriend997/gemini-companion/gemini-cli-runtime)<a href="https://agentmods.dev/skills/gfriend997/gemini-companion/gemini-cli-runtime"><img src="https://agentmods.dev/badge/skills/gfriend997/gemini-companion/gemini-cli-runtime.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00018 | $0.00342 |
| Opus 5 | $0.00009 | $0.00171 |
| Sonnet 5 | $0.00004 | $0.00068 |
| Haiku 4.5 | $0.00002 | $0.00034 |
Grade A, and why
gemini-cli-runtime scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Gemini companion runtime
Single entry point: node "${CLAUDE_PLUGIN_ROOT}/scripts/gemini-companion.mjs" <subcommand> [flags]
| Subcommand | Purpose | Key flags |
|---|---|---|
setup |
Check CLI + key, toggle stop gate | --gate on|off |
task "<prompt>" |
Run Gemini on a task | --background --write --model <m> --resume-last --timeout-mins <n> |
review |
Review current git diff | --adversarial --base <ref> --model <m> |
status |
List jobs / one job | --id <job-id> |
result |
Print finished job output | --id <job-id> |
cancel |
Kill a background job | --id <job-id> |
image "<prompt>" |
Generate image via API | --model <m> --out <file> |
Rules:
- Prompt text is passed as a quoted positional argument; the script forwards it to Gemini over stdin.
--writelets Gemini edit files (yolo approval). Without it, runs are effectively read-only: tools needing approval fail closed in headless mode.- Never pass, echo, or log
GEMINI_API_KEY. The script and CLI read it from the environment themselves. - Exit code 1 means failure; stderr carries the reason. Relay it, do not retry blindly.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 26 lines · 18 tokens per session scan A 9c5e276d1a83
gemini-cli-runtime is a skill published in the GitHub repository Gfriend997/gemini-companion (5 stars, last pushed 24d ago), licensed MIT. It adds 18 tokens to every session and 342 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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