What is skills AGENTS.md?

Project instructions for Harbor, a framework for defining and running tasks for AI agents, including its standard format for reusable skills.

Use them when creating or editing Harbor skills, locating its verifier or command-line code, or checking the required structure and documentation.

They provide the conventions for skill metadata, files, resources, documentation, and common project locations, helping contributors make compatible changes.

How harbor-framework/skills configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to harbor-framework/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.

Copy the file

curl -O https://raw.githubusercontent.com/harbor-framework/skills/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/harbor-framework/skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/harbor-framework/skills/agents-md/github.svg)](https://agentmods.dev/instructions/harbor-framework/skills/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/harbor-framework/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/harbor-framework/skills/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/harbor-framework/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/harbor-framework/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 651 This file is loaded in full into every session.

When invoked 651 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.

Model	Per session	Once invoked
Fable 5.1	$0.00651	$0.00651
Opus 5.5	$0.00260	$0.00260
Sonnet 5.5	$0.00130	$0.00130
Haiku 4.5	$0.00065	$0.00065

Measured 2mo ago against content hash 6367592b7874, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

skills 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 2mo 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 · 58 lines

How it starts

The opening of the file, as written. The whole thing — 58 lines — stays where its author put it; the contents beside it link to each section on GitHub.

harbor-skills — Agent Quick Reference

Agent Skills for the Harbor framework. Skills follow the Agent Skills open standard.

Skill Format Quick Reference

Each skill lives in skills/<skill-name>/ with a required SKILL.md:

YAML frontmatter (required):

name: kebab-case, max 64 chars, must match directory name
description: max 1024 chars, no < or > characters

Optional frontmatter:

license, compatibility, metadata, allowed-tools

Markdown body: Instructions loaded on trigger. Keep under 500 lines.

Bundled resources (optional subdirectories):

references/ — loaded as needed (detailed tables, examples)
scripts/ — executed, not loaded into context
assets/ — used in output (templates, images)

Harbor Documentation Map

Resource	Location
Harbor repo	https://github.com/harbor-framework/harbor
Harbor docs	https://harborframework.com/docs
Harbor cookbook	https://github.com/harbor-framework/harbor-cookbook
Task config model	`src/harbor/models/task/config.py`
Verifier	`src/harbor/verifier/verifier.py`
CLI entry points	`src/harbor/cli/`
Agent base class	`src/harbor/agents/base.py`
Adapter system	`src/harbor/adapters/`

Conventions

Each skill directory has a SKILL.md (required) plus optional references/ subdirectory
Keep SKILL.md body < 500 lines; put detailed tables and walkthroughs in references/
Descriptions should be slightly "pushy" — err toward triggering rather than not
No scripts/ — Harbor already has CLI tools for scaffolding and validation (harbor tasks init, harbor adapters init)
The repo supports Claude Code (.claude-plugin/), Codex, and Cursor (.cursor-plugin/); keep both plugin configs in sync when adding or renaming skills
The name frontmatter field must match the directory name exactly

Common Pitfalls

Don't exceed 1024 chars in the description frontmatter field
Don't use < or > in the description field (breaks YAML parsing)
Don't duplicate content between SKILL.md body and references/ — body should point to references
Don't write skills that wrap simple CLI commands — skills should teach complex multi-step workflows
Don't put Harbor version-specific details in skills without noting the version

Read the full file on GitHub · 58 lines

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.

2mo ago First seen · 58 lines · 651 tokens per session scan A 6367592b7874

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository harbor-framework/skills (14 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 651 tokens to every session, about $0.0026 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 2026-08-30.

Building agents

skills AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
skills AGENTS.mdharbor-framework/skills	Instructions file	14	5mo ago	Apache-2.0	A	651	Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

skills: Instructions file for Codex