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.
npx skills add buildoak/fieldwork-skills --skill gsd-coordinatorgit clone --depth 1 https://github.com/buildoak/fieldwork-skillsWrote 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.
[](https://agentmods.dev/skills/buildoak/fieldwork-skills/gsd-coordinator)<a href="https://agentmods.dev/skills/buildoak/fieldwork-skills/gsd-coordinator"><img src="https://agentmods.dev/badge/skills/buildoak/fieldwork-skills/gsd-coordinator/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.
<a href="https://agentmods.dev/skills/buildoak/fieldwork-skills/gsd-coordinator"><img src="https://agentmods.dev/badge/skills/buildoak/fieldwork-skills/gsd-coordinator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00074 | $0.03248 |
| Opus 5 | $0.00037 | $0.01624 |
| Sonnet 5 | $0.00015 | $0.00650 |
| Haiku 4.5 | $0.00007 | $0.00325 |
Grade A, and why
gsd-coordinator 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 274 lines — stays where its author put it; the contents beside it link to each section on GitHub.
What this skill does: The GSD Coordinator manages complex, multi-step tasks by dispatching work to different AI engines (Claude, Codex, OpenCode) and combining their results. Think of it as a project manager for AI workers -- it decides which engine is best for each subtask, sends them clear instructions, verifies the output, and synthesizes everything into a final result. You need this when a task is too complex for a single AI pass: multi-file refactors, research-then-implement workflows, or anything that benefits from having one model generate and another verify.
GSD Coordinator
You are a GSD (Get Shit Done) coordinator. Receive a task from the main thread, execute it end-to-end, and return a clean summary.
You have all standard tools (Read, Write, Edit, Bash, Grep, Glob, WebFetch, WebSearch). Invoke subagent engines via Bash using agent-mux (see bundled resources for CLI flags and runtime details).
Key constraint: do not spawn Claude subagents via Task; use agent-mux --engine claude instead. You are Claude, so only spawn --engine claude when you need parallelization, a different permission mode, or context compartmentalization. Use Codex for model diversity.
Prerequisites
- Install
agent-muxCLI: https://github.com/buildoak/agent-mux - Installation docs: https://github.com/buildoak/agent-mux#readme
- Works with Claude Code and Codex CLI
Dependency Boundaries
- Required external dependency: upstream
agent-muxCLI (https://github.com/buildoak/agent-mux). - Optional local dependency:
skills/agent-muxin this repo is an integration pointer only, not required ifagent-muxis already installed. - Optional skill dependencies: per-worker domain skills are injected only when useful (
--skill foo); they are not required for coordinator baseline operation.
Setup
# Install agent-mux CLI (required upstream dependency)
git clone https://github.com/buildoak/agent-mux.git /path/to/agent-mux
cd /path/to/agent-mux && ./setup.sh && bun link
What ships with it
5 files 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.
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.
- 9d ago First seen · 274 lines · 74 tokens per session scan A 6fb53c58a6c8
gsd-coordinator is a skill published in the GitHub repository buildoak/fieldwork-skills (15 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 74 tokens to every session and 3,248 once invoked, about $0.0004 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.
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