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fiber-ai-plugin: Instructions file for Codex

AGENTS.md

fiber-ai-plugin AGENTS.md is an instructions file for Codex, OpenCode from fiber-ai/fiber-ai-plugin. It costs 2,343 tokens per session, scanned A, original, MIT.

Repository instructions for a plugin that adds workflow skills and specialist agent profiles to several AI coding tools. It explains the repository structure and rules for writing these skills and profiles.

In plain words
What is it for?
Use it when extending the plugin, authoring a workflow skill, or creating and maintaining specialist agent profiles for supported coding tools.
Why use it?
It gives coding agents the context and rules they need before changing the plugin, while pointing them to the main documentation when it is stored elsewhere.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions .claude-plugin; mentions subagents; mentions Claude Code.

This is fiber-ai/fiber-ai-plugin's own configuration. It tells Codex and OpenCode how to work on fiber-ai-plugin 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 fiber-ai-plugin configures →

not rated 2repo changed 17d ago A scan 2,343 tokens original MIT
View source ↗ fiber-ai/fiber-ai-plugin
Reuse

Borrowing it

Nothing to install: this file belongs to fiber-ai/fiber-ai-plugin. 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/fiber-ai/fiber-ai-plugin/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/fiber-ai/fiber-ai-plugin

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.

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README.md
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Your own site
<a href="https://agentmods.dev/instructions/fiber-ai/fiber-ai-plugin/agents-md"><img src="https://agentmods.dev/badge/instructions/fiber-ai/fiber-ai-plugin/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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/fiber-ai/fiber-ai-plugin/agents-md"><img src="https://agentmods.dev/badge/instructions/fiber-ai/fiber-ai-plugin/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,343 This file is loaded in full into every session.
When invoked 2,343 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 $0.02343 $0.02343
Opus 5.5 $0.00937 $0.00937
Sonnet 5.5 $0.00469 $0.00469
Haiku 4.5 $0.00234 $0.00234

Measured 17d ago against content hash e7456d9cfd3f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fiber-ai-plugin 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 17d 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 · 109 lines

How it starts

The opening of the file, as written. The whole thing — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — fiber-ai-plugin

This repository ships Fiber AI as a first-class plugin for AI coding agents (Claude Code, Cursor, Codex, OpenCode, Copilot CLI, Gemini CLI, VS Code, Windsurf). If you are an agent inspecting this repo to fix something or extend it, read this file first.

What this repo contains

  • skills/ — per-workflow skills (Markdown). Each skill has a SKILL.md with YAML frontmatter (name, description, user-invocable, argument-hint). The description is what other agents match against to auto-load the skill, so it must contain realistic user trigger phrases.
  • claude/agents/ — persona subagent files (Claude Code format, canonical source). Flat .md files; each is a full subagent system prompt with YAML frontmatter. See "Persona authoring rules" below. Current personas: ai-recruiter, ai-sdr, gtm-strategist, signal-scout, data-quality-auditor, product-engineer, fiber-sde. Do not move them back to a root agents/ directory: Gemini CLI auto-loads agents/ from the extension root and rejects the Claude Code frontmatter (tools string, skills).
  • cursor/agents/ — Cursor-compatible copies of the persona files (plain cp from claude/agents/).
  • .opencode/agents/ — OpenCode-compatible copies of the persona files (cp + frontmatter swap: name/tools/skills/mcpServers/color removed, mode: subagent added).
  • .codex/agents/ — Codex CLI TOML translations of the persona files. Generated from claude/agents/*.md via a small bash script; the developer instructions body is copied verbatim, not re-authored.
  • .mcp.json, cursor/mcp.json, vscode/mcp.json, gemini-extension.json — MCP server configuration for each supported environment. All three Fiber MCP endpoints should appear in every config:
    • https://mcp.fiber.ai/mcp/v2 — direct tools for the top ~10 priority operations, API-key auth.
    • https://mcp.fiber.ai/mcp/v3 — direct tools for every public operation with compact descriptions, OAuth (SSO) auth.
    • https://mcp.fiber.ai/mcp — 5 meta-tools (search_endpoints, list_tag_packs, list_all_endpoints, get_endpoint_details_full, call_operation) over every public operation, API-key auth (same shape as V2).
  • .claude-plugin/, .cursor-plugin/ — manifest files for the Claude Code and Cursor plugin formats. They register claude/agents/ and cursor/agents/ respectively, alongside skills/.
  • cursor/rules/, windsurf/rules/ — rule files surfaced to the agent inside those IDEs.
  • hooks/ — Claude Code lifecycle hooks (hooks/hooks.json). Do not also set "hooks" in .claude-plugin/plugin.json; Claude Code auto-discovers hooks/hooks.json and a duplicate manifest entry loads hooks twice.
  • .opencode/INSTALL.md — fetch-and-follow install instructions for OpenCode.

Read the full file on GitHub · 109 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.

  1. 17d ago Changed · +3 lines · +150 tokens per session e7456d9cfd3f
  2. 2mo ago First seen · 106 lines · 2,193 tokens per session scan A c930c2cd2b91

Subscribe to this mod's changes

fiber-ai-plugin AGENTS.md is an instructions file published in the GitHub repository fiber-ai/fiber-ai-plugin (2 stars, last pushed 18d ago), licensed MIT. It adds 2,343 tokens to every session, about $0.0094 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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