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.
npx skills add cnemri/google-genai-skills --skill google-developer-knowledgegit clone --depth 1 https://github.com/cnemri/google-genai-skillsWrote 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/cnemri/google-genai-skills/google-developer-knowledge)<a href="https://agentmods.dev/skills/cnemri/google-genai-skills/google-developer-knowledge"><img src="https://agentmods.dev/badge/skills/cnemri/google-genai-skills/google-developer-knowledge.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 | $0.00054 | $0.00664 |
| Opus 5 | $0.00027 | $0.00332 |
| Sonnet 5 | $0.00011 | $0.00133 |
| Haiku 4.5 | $0.00005 | $0.00066 |
Grade A, and why
google-developer-knowledge scanned grade A 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 7d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
This skill uses simple bash scripts with curl (no dependencies required). How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Google Developer Knowledge
Use this skill to search and retrieve content from Google's public developer documentation corpus using the Developer Knowledge API.
This skill uses simple bash scripts with curl (no dependencies required).
Prerequisites
-
Enable the API: Enable the Developer Knowledge API in your Google Cloud project.
-
Create an API Key:
- Go to the Credentials page
- Click Create credentials → API key
- Restrict the key to Developer Knowledge API only
-
Set Environment Variable:
DEVELOPERKNOWLEDGE_API_KEY: Your Developer Knowledge API key
Searchable Corpus
The API searches these domains:
ai.google.devdeveloper.android.comdeveloper.chrome.comdevelopers.google.comdocs.cloud.google.comfirebase.google.comweb.devwww.tensorflow.org
Usage
1. Search for Documents
Search for document chunks matching a query. Returns snippets and parent document references.
./skills/google-developer-knowledge/scripts/search_docs.sh "How to use Gemini API in Python"
With pagination:
./skills/google-developer-knowledge/scripts/search_docs.sh "BigQuery" --page-size 10
2. Get a Single Document
Retrieve the full content of a document using its name from search results.
./skills/google-developer-knowledge/scripts/get_document.sh "documents/ai.google.dev/gemini-api/docs/get-started/python"
Save to file:
./skills/google-developer-knowledge/scripts/get_document.sh "documents/ai.google.dev/..." --output doc.json
3. Batch Get Documents
Retrieve up to 20 documents in a single API call.
./skills/google-developer-knowledge/scripts/batch_get_documents.sh \
"documents/ai.google.dev/gemini-api/docs/get-started/python" \
"documents/ai.google.dev/gemini-api/docs/models"
What ships with it
3 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.
- 7d ago First seen · 90 lines · 54 tokens per session scan A 75c77356662d
google-developer-knowledge is a skill published in the GitHub repository cnemri/google-genai-skills (126 stars, last pushed 7mo ago), licensed MIT. It adds 54 tokens to every session and 664 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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