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 Vit129/agy-plugin-cc --skill gemini-3-promptinggit clone --depth 1 https://github.com/Vit129/agy-plugin-ccWrote 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/vit129/agy-plugin-cc/gemini-3-prompting)<a href="https://agentmods.dev/skills/vit129/agy-plugin-cc/gemini-3-prompting"><img src="https://agentmods.dev/badge/skills/vit129/agy-plugin-cc/gemini-3-prompting/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/vit129/agy-plugin-cc/gemini-3-prompting"><img src="https://agentmods.dev/badge/skills/vit129/agy-plugin-cc/gemini-3-prompting.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00026 | $0.00402 |
| Opus 5 | $0.00013 | $0.00201 |
| Sonnet 5 | $0.00005 | $0.00080 |
| Haiku 4.5 | $0.00003 | $0.00040 |
Grade A, and why
gemini-3-prompting 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 9d 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 3 Prompting for agy
Use this skill only to tighten a user's request into a better agy prompt before forwarding to task.
Effective prompt structure
- State the goal clearly — one sentence describing the desired end state
- Provide context — relevant files, error messages, or constraints the agent should know
- Specify scope — what agy should and should not touch
- State acceptance criteria — how to know when the task is done
Do
- Be specific about files, functions, or components involved
- Include error messages verbatim if debugging
- Mention the tech stack (React, Python, etc.) if not obvious from the repo
- Ask for a specific output format when the result needs to be consumed downstream
Don't
- Don't ask agy to "look at everything" — scope it to the relevant area
- Don't include Claude-side analysis in the prompt — forward the raw task
- Don't add commentary or padding — agy works best with concise, direct prompts
- Don't include
--background,--continue, or--freshflags in the prompt text
Prompt antipatterns
| Antipattern | Better |
|---|---|
| "Fix the bug somewhere in the auth flow" | "Fix the 401 error in src/auth/middleware.js:42 — token is not being verified before route access" |
| "Improve the code" | "Refactor src/utils/parser.js to remove duplicate null checks and add JSDoc for the public functions" |
| "Look at everything and tell me what's wrong" | "Review src/features/aiInvestment/ for stale state patterns and Zustand anti-patterns" |
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.
- 9d ago First seen · 39 lines · 26 tokens per session scan A 8afb18cc270c
gemini-3-prompting is a skill published in the GitHub repository Vit129/agy-plugin-cc (5 stars, last pushed 17d ago), licensed MIT. It adds 26 tokens to every session and 402 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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