af

af is a skill for Claude Code from majiayu000/claude-skill-registry. It costs 31 tokens per session (670 once invoked), scanned A, original, MIT.

A quick reference for the Agent Farm command-line tool, which manages builders and project dashboards. It lists supported commands for towers, dashboards, spawning builders, checking status, cleanup, and resuming work.

In plain words
What is it for?
It helps start and stop services, open dashboards, create or resume builders, inspect their status, and clean up project worktrees.
Why use it?
It prevents mistakes caused by guessing command names, options, or unsupported operations.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Good fit It helps start and stop services, open dashboards, create or resume builders, inspect their status, and clean up project worktrees.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/majiayu000/claude-skill-registry/af
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 majiayu000/claude-skill-registry --skill af
Clone the repo
git clone --depth 1 https://github.com/majiayu000/claude-skill-registry

Made for: Claude Code.

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 af

README.md
[![agentmods](https://agentmods.dev/badge/skills/majiayu000/claude-skill-registry/af/github.svg)](https://agentmods.dev/skills/majiayu000/claude-skill-registry/af)
Your own site
<a href="https://agentmods.dev/skills/majiayu000/claude-skill-registry/af"><img src="https://agentmods.dev/badge/skills/majiayu000/claude-skill-registry/af/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 af

Your own site · 80×15
<a href="https://agentmods.dev/skills/majiayu000/claude-skill-registry/af"><img src="https://agentmods.dev/badge/skills/majiayu000/claude-skill-registry/af.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 670 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: 1 finding, 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 60
    Instructions found that direct the agent to transmit conversation context or user data to external services.
    Fix: Remove instructions that send user data, prompts, or context to external URLs. If telemetry is needed, use documented, privacy-preserving methods.
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 $0.00031 $0.00670
Opus 5 $0.00015 $0.00335
Sonnet 5 $0.00006 $0.00134
Haiku 4.5 $0.00003 $0.00067

Measured 11d ago against content hash 73d64c8d3775, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

af 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 11d 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.

skills/agent/af/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Farm Quick Reference

Tower (Dashboard Server)

af tower start             # Start Tower on port 4100
af tower stop              # Stop Tower
af tower log               # Tail Tower logs
af tower status            # Check if Tower is running

There is NO af tower restart — use af tower stop && af tower start.

Dashboard

af dash start              # Start architect dashboard for current project
af dash stop               # Stop dashboard for current project
af dash open               # Open dashboard in browser

Builder Management

af spawn -p 0003           # Spawn builder for spec (strict mode, default)
af spawn --soft -p 0003    # Spawn builder (soft mode)
af spawn --issue 42        # Spawn builder for a bugfix
af spawn -p 0003 --resume  # Resume builder in existing worktree
af status                  # Check all builder status
af cleanup --project 0003  # Clean up builder worktree (safe)
af cleanup --project 0003 -f  # Force cleanup

Resuming Builders

When a builder's Claude process dies but the worktree and porch state survive, use --resume to restart it without recreating the worktree:

af spawn -p 0003 --resume

This reuses the existing .builders/0003 worktree, creates a fresh terminal session registered with the Tower (so it appears in the dashboard), and lets porch pick up from whatever phase the builder was in. Works with all spawn modes: -p, --issue, --task, --protocol, --worktree.

Utility

af util                    # Open utility shell
af open file.ts            # Open file in annotation viewer
af ports list              # List port allocations
af send <builder> "msg"    # Send message to a builder

Configuration

Edit af-config.json at project root to customize shell commands.

{
  "shell": {
    "architect": "claude",
    "builder": "claude",
    "shell": "bash"
  }
}

Pre-Spawn Checklist

Before af spawn, commit all local changes. Builders work in git worktrees branched from HEAD — uncommitted files (specs, plans, codev updates) are invisible to the builder. The spawn command will refuse if the worktree is dirty (override with --force).

Read the full file on GitHub · 90 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 11d ago First seen · 90 lines · 31 tokens per session scan A 73d64c8d3775

Subscribe to this mod's changes

af is a skill published in the GitHub repository majiayu000/claude-skill-registry (600 stars, last pushed yesterday), licensed MIT. It adds 31 tokens to every session and 670 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 2026-08-30.