gemini

gemini is a skill for Claude Code, Codex from ashish7802/awesome-api-skills. It costs 0 tokens per session (523 once invoked), scanned A, original, MIT.

A guide to using Google's Gemini models through its developer API, including text, images, audio, and video. It explains setup, authentication, requests, responses, safety handling, and limits.

In plain words
What is it for?
Use it when building applications that call Gemini with the Google GenAI libraries or Vertex AI, especially when sending or processing media.
Why use it?
It reduces the need to piece together API usage and multimodal input handling from scattered documentation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it when building applications that call Gemini with the Google GenAI libraries or Vertex AI, especially when sending or processing media.

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Install with agentmods
npx agentmods add skills/ashish7802/awesome-api-skills/gemini
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add ashish7802/awesome-api-skills --skill gemini
Clone the repo
git clone --depth 1 https://github.com/ashish7802/awesome-api-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for gemini

README.md
[![agentmods](https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/gemini/github.svg)](https://agentmods.dev/skills/ashish7802/awesome-api-skills/gemini)
Your own site
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/gemini"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/gemini/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.

agentmods 80×15 button for gemini

Your own site · 80×15
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/gemini"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/gemini.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 523 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00523
Opus 5 $0.00000 $0.00262
Sonnet 5 $0.00000 $0.00105
Haiku 4.5 $0.00000 $0.00052

Measured 8d ago against content hash 089eaca5b8f6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

gemini 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.

The scan reads SKILL.md. This mod also ships 3 executable files (examples/example.py, examples/example.ts, tests/skill.test.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/gemini/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Google Gemini API Skill

Overview

Google Gemini offers natively multimodal capabilities (text, image, audio, video). This skill focuses on @google/genai and the v1beta API surface.

Installation

npm install @google/genai
pip install google-genai

Authentication

Use a Google API key passed to the client initialization. For GCP environments, Vertex AI authentication via IAM is preferred.

Core Concepts

  • Parts: The building blocks of a message. A part can be text or inline data (images).
  • Gemini 1.5 Pro: Features a massive 1-million to 2-million token context window.
  • System Instructions: Provided at the model initialization level.

Common Workflows

  1. Initialize GoogleGenAI.
  2. Call models.generateContent with a multimodal array of parts.
  3. Extract the text from the response candidate.

Error Handling

Watch for FinishReason.SAFETY. If the model refuses to answer due to safety settings, the response will be empty but the finishReason will indicate why.

Security

Tune safety settings (HARM_CATEGORY_HATE_SPEECH, etc.) according to your application's risk tolerance.

Rate Limits

Free tier offers 15 RPM for Gemini 1.5 Flash. Paid tiers depend on GCP quotas.

Best Practices

Leverage the massive context window by uploading entire codebases or PDFs rather than aggressively chunking, as Gemini 1.5's recall is exceptionally high.

Troubleshooting

If multimodal requests fail, ensure inline data is base64 encoded and the correct MIME type (e.g., image/jpeg) is specified.

References

Why use this skill

Use this when your agent works with gemini — structured patterns beat pasted docs and prevent common hallucinations.

AI pitfalls

  • Using deprecated model IDs or wrong API endpoints
  • Confusing chat vs completions vs embeddings APIs
  • Omitting rate-limit and token budget handling

Production checklist

  • Secrets in environment variables, not source code
  • Error handling and logging in place
  • Rate limits and timeouts configured

Read the full file on GitHub · 62 lines

Files

What ships with it

5 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.

Changes

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.

  1. 8d ago First seen · 62 lines · 0 tokens per session scan A 089eaca5b8f6

Subscribe to this mod's changes

gemini is a skill published in the GitHub repository ashish7802/awesome-api-skills (13 stars, last pushed 8d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 523 tokens. 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 2026-08-30.

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