skillfire: Instructions file for Codex

AGENTS.md

skillfire AGENTS.md is an instructions file for Codex, OpenCode from kainulla/skillfire. It costs 159 tokens per session, scanned A, original, MIT.

A zero-configuration command-line tool that tests an AI agent skill by creating tests from its SKILL.md file and checking whether the skill is triggered and improves results.

In plain words
What is it for?
Use it to evaluate SKILL.md files, report test results, and follow the repository's issue, triage, and domain-documentation rules.
Why use it?
It helps reveal whether a skill's instructions actually work instead of relying only on manual inspection.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is kainulla/skillfire's own configuration. It tells Codex and OpenCode how to work on skillfire itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything skillfire configures →

Reuse

Borrowing it

Nothing to install: this file belongs to kainulla/skillfire. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/kainulla/skillfire/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/kainulla/skillfire

Made for: Codex, OpenCode.

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 skillfire AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/kainulla/skillfire/agents-md/github.svg)](https://agentmods.dev/instructions/kainulla/skillfire/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/kainulla/skillfire/agents-md"><img src="https://agentmods.dev/badge/instructions/kainulla/skillfire/agents-md/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 skillfire AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/kainulla/skillfire/agents-md"><img src="https://agentmods.dev/badge/instructions/kainulla/skillfire/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 159 This file is loaded in full into every session.
When invoked 159 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00159 $0.00159
Opus 5.5 $0.00064 $0.00064
Sonnet 5.5 $0.00032 $0.00032
Haiku 4.5 $0.00016 $0.00016

Measured 1mo ago against content hash 7259893230f1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skillfire AGENTS.md 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.

AGENTS.md · 18 lines

What it actually says

skillfire

A zero-config CLI that tests an AI agent Skill (SKILL.md) by deriving its own test suite from the file itself, then reporting whether the skill actually triggers and improves output.

Agent skills

Issue tracker

Issues are tracked as GitHub issues via the gh CLI (repo auto-detected from the remote). See docs/agents/issue-tracker.md.

Triage labels

Canonical labels: needs-triage, needs-info, ready-for-agent, ready-for-human, wontfix. See docs/agents/triage-labels.md.

Domain docs

Single-context: CONTEXT.md + docs/adr/ at the repo root. See docs/agents/domain.md.

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. 1mo ago First seen · 18 lines · 159 tokens per session scan A 7259893230f1

Subscribe to this mod's changes

skillfire AGENTS.md is an instructions file published in the GitHub repository kainulla/skillfire (5 stars, last pushed 4mo ago), licensed MIT. It adds 159 tokens to every session, about $0.0006 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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