fieldwork-skills: Instructions file for Codex

AGENTS.md

fieldwork-skills AGENTS.md is an instructions file for Codex, OpenCode from buildoak/fieldwork-skills. It costs 712 tokens per session, scanned A, original, Apache-2.0.

A set of instructions for installing AI-agent skills from the fieldwork-skills collection. It explains where skills live and how to install one or all of them for Codex CLI or Claude Code.

In plain words
What is it for?
Use it to list available fieldwork skills or install selected skills such as browser operations, web search, summarization, or vault management.
Why use it?
The two agent tools look for skills in different locations and files. These instructions prevent installing a skill where the intended agent cannot find it.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions Claude Code; reads ~/.codex paths.

This is buildoak/fieldwork-skills's own configuration. It tells Codex and OpenCode how to work on fieldwork-skills 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 fieldwork-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to buildoak/fieldwork-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/buildoak/fieldwork-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/buildoak/fieldwork-skills

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 712 This file is loaded in full into every session.
When invoked 712 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 $0.00712 $0.00712
Opus 5.5 $0.00285 $0.00285
Sonnet 5.5 $0.00142 $0.00142
Haiku 4.5 $0.00071 $0.00071

Measured 1mo ago against content hash 6aaad550d1d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fieldwork-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 1mo 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 · 102 lines

How it starts

The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.

fieldwork-skills Agent Installation Guide

fieldwork-skills is a collection of AI agent skills by buildoak. Each skill lives in skills/<skillname>/ and includes a SKILL.md runbook plus update metadata.

Critical Runtime Rules

  • Codex CLI reads instructions from the repository root AGENTS.md only.
  • Codex CLI does not read codex.md and does not read .codex/skills/.
  • Claude Code reads skills from .claude/skills/<skillname>/SKILL.md.

List Available Skills

Skills are the folders inside skills/.

ls -1 skills/

Current skills:

  • agent-mux
  • browser-ops
  • chatgpt-search
  • google-workspace-ops
  • gsd-coordinator
  • image-gen
  • summarize
  • trueskill-rank
  • vault
  • web-search

Install One Skill

Replace <skillname> with a folder name from skills/.

Claude Code:

mkdir -p /path/to/your-project/.claude/skills
cp -R skills/<skillname> /path/to/your-project/.claude/skills/<skillname>

Codex CLI (append this skill's instructions to the target project's root AGENTS.md):

touch /path/to/your-project/AGENTS.md
{
  echo
  echo "<!-- fieldwork-skill:<skillname> -->"
  cat skills/<skillname>/SKILL.md
} >> /path/to/your-project/AGENTS.md

Install All Skills

Claude Code:

mkdir -p /path/to/your-project/.claude/skills
for d in skills/*/; do
  cp -R "$d" "/path/to/your-project/.claude/skills/$(basename "$d")"
done

Codex CLI (append all skill runbooks into the target project's root AGENTS.md):

touch /path/to/your-project/AGENTS.md
for f in skills/*/SKILL.md; do
  skill="$(basename "$(dirname "$f")")"
  {
    echo
    echo "<!-- fieldwork-skill:${skill} -->"
    cat "$f"
  } >> /path/to/your-project/AGENTS.md
done

Install Runtime Dependencies

After copying skill folders, read each skill's SKILL.md for runtime dependency setup. Skills may require brew packages, pip packages, npm packages, API keys, or other prerequisites. Each SKILL.md has a "Setup" section with the specific instructions. For a detailed walkthrough, see references/installation-guide.md inside each skill directory.

Read the full file on GitHub · 102 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. 1mo ago First seen · 102 lines · 712 tokens per session scan A 6aaad550d1d1

Subscribe to this mod's changes

fieldwork-skills AGENTS.md is an instructions file published in the GitHub repository buildoak/fieldwork-skills (15 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 712 tokens to every session, about $0.0028 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.

Related

Other instructions, from other repositories