Borrowing it
Nothing to install: this file belongs to EndogenAI/dogma. 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/EndogenAI/dogma/main/.github/skills/agent-file-authoring/SKILL.mdgit clone --depth 1 https://github.com/EndogenAI/dogmaWrote 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/endogenai/dogma/agent-file-authoring)<a href="https://agentmods.dev/skills/endogenai/dogma/agent-file-authoring"><img src="https://agentmods.dev/badge/skills/endogenai/dogma/agent-file-authoring/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/endogenai/dogma/agent-file-authoring"><img src="https://agentmods.dev/badge/skills/endogenai/dogma/agent-file-authoring.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 | $0.00120 | $0.02948 |
| Opus 5 | $0.00060 | $0.01474 |
| Sonnet 5 | $0.00024 | $0.00590 |
| Haiku 4.5 | $0.00012 | $0.00295 |
Grade A, and why
agent-file-authoring 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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 253 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent File Authoring
This skill enacts the Endogenous-First axiom from MANIFESTO.md: agent files are re-encodings of AGENTS.md, not independent inventions. Every .agent.md file derives its structure, posture, and governing constraints from AGENTS.md and MANIFESTO.md. Agents re-encode; they do not re-derive. Full authoring guidance is in docs/guides/agents.md and the fleet catalog in .github/agents/README.md.
1. File Naming and Location
- Location:
.github/agents/<role-slug>.agent.md - Slug format: kebab-case, lowercase, e.g.
executive-docs,research-scout - One file per agent role — do not combine multiple personas into a single file
Use the scaffold helper to generate a compliant template:
uv run python scripts/scaffold_agent.py <role-slug>
# Creates: .github/agents/<role-slug>.agent.md
2. YAML Frontmatter
Every agent file must open with YAML frontmatter:
---
name: <role name in title case>
description: |
<≥25 character description — CI enforces minimum length>
---
Field requirements (enforced by validate_agent_files.py):
| Field | Required | Constraint |
|---|---|---|
name |
Yes | Non-empty string |
description |
Yes | ≥ 25 characters |
The description field should be a | block for multi-line content. It is consumed by VS Code and GitHub Copilot as the agent's self-description in selection menus.
2b. Optional Discipline Fields for Project Governance
Every agent file should include optional frontmatter fields to track project governance and effort:
---
name: Executive PM
description: Maintain issues, labels, milestones, and project hygiene...
# Optional — encode project governance, milestone tracking, and effort
tier: Wave 1 # Milestone this agent targets/belongs to (Foundation|Wave 1|Wave 2|Adoption|Hardening)
effort: M # Effort to implement: s/m/l/xl (small/medium/large/xlarge)
status: active # Current status: active | beta | deprecated | blocked
area: agents # Codebase domain: agents | scripts | docs | ci | tests | deps | research
depends-on: # Other agents this agent requires/follows from
- Review
- GitHub
---
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.
- 8d ago First seen · 253 lines · 120 tokens per session scan A 5a339224db54
agent-file-authoring is a skill published in the GitHub repository EndogenAI/dogma (2 stars, last pushed 15d ago), licensed Apache-2.0. It adds 120 tokens to every session and 2,948 once invoked, about $0.0006 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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