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 arescope/gemini-plugin-cc --skill gemini-promptinggit clone --depth 1 https://github.com/arescope/gemini-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/arescope/gemini-plugin-cc/gemini-prompting)<a href="https://agentmods.dev/skills/arescope/gemini-plugin-cc/gemini-prompting"><img src="https://agentmods.dev/badge/skills/arescope/gemini-plugin-cc/gemini-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/arescope/gemini-plugin-cc/gemini-prompting"><img src="https://agentmods.dev/badge/skills/arescope/gemini-plugin-cc/gemini-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 | $0.00022 | $0.00391 |
| Opus 5 | $0.00011 | $0.00196 |
| Sonnet 5 | $0.00004 | $0.00078 |
| Haiku 4.5 | $0.00002 | $0.00039 |
Grade A, and why
gemini-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 Prompting Guide
How to compose effective prompts for Gemini CLI in this plugin.
Core principle
Prompt Gemini like an operator — compact, block-structured with XML tags. One clear task per run. State what "done" looks like.
Default prompt recipe
Combine these blocks for most tasks:
<task>What to do. What done looks like.</task>
<structured_output_contract>Format of the expected output.</structured_output_contract>
<default_follow_through_policy>How to handle ambiguity.</default_follow_through_policy>
<verification_loop>Self-check before finishing.</verification_loop>
<grounding_rules>Only use visible context. No speculation.</grounding_rules>
When to add extra blocks
| Situation | Add block |
|---|---|
| Writing/editing code | <action_safety>, <completeness_contract> |
| Code review | <operating_stance>, <finding_bar>, <calibration_rules> |
| Research/investigation | <research_mode>, <dig_deeper_nudge>, <citation_rules> |
| Long-running tasks | <progress_updates> |
| External tool calls | <tool_persistence_rules>, <missing_context_gating> |
Gemini-specific advantages
- Gemini's 1M context window can handle entire codebases — provide broad context.
- Use
--include-directoriesto focus on specific parts of the repo when needed.
Reference files
references/prompt-blocks.md— all reusable XML blocksreferences/gemini-prompt-recipes.md— end-to-end templatesreferences/gemini-prompt-antipatterns.md— failure modes to avoid
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.
- 9d ago First seen · 47 lines · 22 tokens per session scan A 48747f36a9a9
gemini-prompting is a skill published in the GitHub repository arescope/gemini-plugin-cc (6 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 22 tokens to every session and 391 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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