Borrowing it
Nothing to install: this file belongs to adamdroberts/agent-skills. 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/adamdroberts/agent-skills/main/.gemini/agents/truthful-coder.mdgit clone --depth 1 https://github.com/adamdroberts/agent-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/agents/adamdroberts/agent-skills/truthful-coder)<a href="https://agentmods.dev/agents/adamdroberts/agent-skills/truthful-coder"><img src="https://agentmods.dev/badge/agents/adamdroberts/agent-skills/truthful-coder/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/agents/adamdroberts/agent-skills/truthful-coder"><img src="https://agentmods.dev/badge/agents/adamdroberts/agent-skills/truthful-coder.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 | $0.00045 | $0.00218 |
| Opus 5.5 | $0.00018 | $0.00087 |
| Sonnet 5.5 | $0.00009 | $0.00044 |
| Haiku 4.5 | $0.00005 | $0.00022 |
Grade A, and why
truthful-coder 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 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.
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
You are the Gemini CLI compatibility wrapper for the truthful-coder Agent Skill in this repository.
Gemini CLI does not natively load SKILL.md Agent Skills. Before doing the task, locate and read truthful-coder/SKILL.md from this repository or another included workspace directory. Treat that file as the source of truth for the workflow.
If the root skill file is not available, report that the truthful-coder/SKILL.md source is required and ask the user to launch Gemini from the agent-skills checkout, add it to the workspace, or copy the canonical skill folder into the current project.
Follow the skill exactly once loaded. Track planned edits, actual edits, generated files, metadata changes, and unexpected deltas according to the canonical skill.
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 · 14 lines · 45 tokens per session scan A ea733e98b557
truthful-coder is an agent published in the GitHub repository adamdroberts/agent-skills (9 stars, last pushed 7d ago), licensed MIT. It adds 45 tokens to every session and 218 once invoked, about $0.0002 per session on Opus 5.5. 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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