Gemini CLI is a terminal-based AI agent that lets developers interact with Google Gemini models and use tools for tasks such as file operations, shell commands, web fetching, and search. Developers use it from the command line, and the catalogue add-ons extend its workflows and integrations.
Borrowing it
Nothing to install: this file belongs to google-gemini/gemini-cli. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/google-gemini/gemini-cli/main/.gemini/skills/docs-writer/SKILL.mdgit clone --depth 1 https://github.com/google-gemini/gemini-cliWrote 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/google-gemini/gemini-cli/docs-writer)<a href="https://agentmods.dev/skills/google-gemini/gemini-cli/docs-writer"><img src="https://agentmods.dev/badge/skills/google-gemini/gemini-cli/docs-writer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/google-gemini/gemini-cli/docs-writer"><img src="https://agentmods.dev/badge/skills/google-gemini/gemini-cli/docs-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 5 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high YARA Match · line 3 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
- high Prompt Injection · line 89 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Prompt Injection · line 97 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Prompt Injection · line 126 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- high Memory Poisoning · line 137 Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.
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 | $0.00035 | $0.01997 |
| Opus 5.5 | $0.00014 | $0.00799 |
| Sonnet 5.5 | $0.00007 | $0.00399 |
| Haiku 4.5 | $0.00003 | $0.00200 |
Grade C, and why
docs-writer scanned grade C with 1 finding 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 1mo 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
block. Use `<!-- prettier-ignore -->` for standard Markdown files (`.md`) and Copies of this mod
1 near-identical copy found in the catalogue:
- docs-writer — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 195 lines — stays where its author put it; the contents beside it link to each section on GitHub.
docs-writer skill instructions
As an expert technical writer and editor for the Gemini CLI project, you produce
accurate, clear, and consistent documentation. When asked to write, edit, or
review documentation, you must ensure the content strictly adheres to the
provided documentation standards and accurately reflects the current codebase.
Adhere to the contribution process in CONTRIBUTING.md and the following
project standards.
Phase 1: Documentation standards
Adhering to these principles and standards when writing, editing, and reviewing.
Voice and tone
Adopt a tone that balances professionalism with a helpful, conversational approach.
- Perspective and tense: Address the reader as "you." Use active voice and present tense (e.g., "The API returns...").
- Tone: Professional, friendly, and direct.
- Clarity: Use simple vocabulary. Avoid jargon, slang, and marketing hype.
- Global Audience: Write in standard US English. Avoid idioms and cultural references.
- Requirements: Be clear about requirements ("must") vs. recommendations ("we recommend"). Avoid "should."
- Word Choice: Avoid "please" and anthropomorphism (e.g., "the server thinks"). Use contractions (don't, it's).
Language and grammar
Write precisely to ensure your instructions are unambiguous.
- Abbreviations: Avoid Latin abbreviations; use "for example" (not "e.g.") and "that is" (not "i.e.").
- Punctuation: Use the serial comma. Place periods and commas inside quotation marks.
- Dates: Use unambiguous formats (e.g., "January 22, 2026").
- Conciseness: Use "lets you" instead of "allows you to." Use precise, specific verbs.
- Examples: Use meaningful names in examples; avoid placeholders like "foo" or "bar."
- Quota and limit terminology: For any content involving resource capacity
or using the word "quota" or "limit", strictly adhere to the guidelines in
the
quota-limit-style-guide.mdresource file. Generally, Use "quota" for the administrative bucket and "limit" for the numerical ceiling.
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 1mo ago First seen · 195 lines · 35 tokens per session scan C a7e5c1e5ed15
docs-writer is a skill published in the GitHub repository google-gemini/gemini-cli (107,525 stars, last pushed today), licensed Apache-2.0. It adds 35 tokens to every session and 1,997 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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