ijfw-agents-md

ijfw-agents-md is a skill for Claude Code from FerroxLabs/ijfw. It costs 38 tokens per session (2,701 once invoked), scanned A, original, MIT.

A manager for a project's canonical AGENTS.md file, which stores instructions that coding agents can follow across different tools. It keeps generated sections separate from content written by the project team.

In plain words
What is it for?
Use it to create or update agent instructions, project memory links, routing rules, generated agent definitions, and workflow notes.
Why use it?
It avoids maintaining separate, drifting instruction files for each agent platform. It preserves user-written sections while refreshing managed sections.

Skill for Claude Code

Written for Claude Code: context: fork in frontmatter. Also seen: model in frontmatter; mentions CLAUDE.md; mentions subagents.

Part of the ijfw plugin — 34 skills, 22 commands, 37 agents, 6 hooks shipped together

Good fit Use it to create or update agent instructions, project memory links, routing rules, generated agent definitions, and workflow notes.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ferroxlabs/ijfw/ijfw-agents-md
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add FerroxLabs/ijfw --skill ijfw-agents-md
Clone the repo
git clone --depth 1 https://github.com/FerroxLabs/ijfw

Made for: Claude Code.

Or install ijfw, the plugin that ships this one along with the rest of its 34 skills, 22 commands, 37 agents, 6 hooks.

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 ijfw-agents-md

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/ferroxlabs/ijfw/ijfw-agents-md"><img src="https://agentmods.dev/badge/skills/ferroxlabs/ijfw/ijfw-agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,701 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Prompt Injection · line 40
    Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.
    Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
  • medium Excessive Agency · line 5
    Skill selects an external model or provider that may use a different account or billing plan than the operator expects. Undisclosed model switches can cause unexpected cost or quota consumption.
    Fix: Remove the model/provider override or disclose it prominently and require explicit operator approval before invoking an external coding CLI or billed model.
How audits are shown
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 $0.00038 $0.02701
Opus 5 $0.00019 $0.01350
Sonnet 5 $0.00008 $0.00540
Haiku 4.5 $0.00004 $0.00270

Measured 4d ago against content hash 649dedc9c500, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

ijfw-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 4d ago.

The scan reads SKILL.md. This mod also ships 9 executable files (scripts/build_blocks.py, scripts/build-blocks.sh, scripts/cold_scan_trigger.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

claude/skills/ijfw-agents-md/SKILL.md · 263 lines

How it starts

The opening of the file, as written. The whole thing — 263 lines — stays where its author put it; the contents beside it link to each section on GitHub.

IJFW AGENTS.md Manager

Maintains a project's AGENTS.md per the open spec at https://agents.md/. AGENTS.md is the canonical agent-instructions surface across every IJFW host (Claude, Gemini, Codex, Wayland, Hermes, Cursor, Windsurf, Copilot). Each platform-specific file (CLAUDE.md, GEMINI.md, WAYLAND.md, etc.) is a thin adapter that points here.


When to Invoke

  • User says: "agents.md", "update AGENTS.md", "regenerate agents file".
  • Auto-fired by ijfw-team after generating agents to .ijfw/agents/.
  • Auto-fired by session-start hooks to refresh memory + agents blocks.
  • Auto-fired by ijfw-workflow at brainstorm-LOCK and plan-LOCK with intent context (v1.4.4 N7).

Marker Block Taxonomy (reserved -- do not break)

The file is segmented by four IJFW-managed regions. Content outside markers is user-authored and untouched.

Block Purpose
MEMORY Pointer to project memory + last handoff summary
ROUTING Peer-skill routing rules (workflow, design, etc.)
AGENTS Auto-generated agent definitions from .ijfw/agents/
BLACKBOARD Reserved for Pillar B (multi-CLI orchestration); empty
DISCIPLINE Per-domain discipline rules (code | narrative | business | design | research)

Each block is delimited by <!-- IJFW-<NAME>-START --> / <!-- IJFW-<NAME>-END --> markers. Replace inside; never overwrite.


Frontmatter Contract (typed)

YAML frontmatter at top of file follows the JSON Schema at schema/agents-md-frontmatter.json. Keys that A1 may write or hoist:

  • ijfw_version, ijfw_schema (required when present)
  • type, primary_type, secondary_types, confidence (A3 writes)
  • detected_at, signals (A3 writes)
  • compute_trust (vm_only | subprocess), compute_net (deny | allow)

Wayland reads compute_trust + compute_net to set per-project sandbox defaults. Env vars override only when explicitly set.

Read the full file on GitHub · 263 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. 4d ago First seen · 263 lines · 38 tokens per session scan A 649dedc9c500

Subscribe to this mod's changes

ijfw-agents-md is a skill published in the GitHub repository FerroxLabs/ijfw (210 stars, last pushed 2d ago), licensed MIT. It adds 38 tokens to every session and 2,701 once invoked, about $0.0002 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 2026-09-05.