ag-kit: Skill for Claude Code

.agents/skills/coordinator-mode/SKILL.md

coordinator-mode is a skill for Claude Code from vudovn/ag-kit. It costs 35 tokens per session (1,740 once invoked), scanned A, original, MIT.

A workflow for coordinating several coding agents on one complex task. It breaks work into smaller jobs, runs safe research in parallel, and combines the results.

In plain words
What is it for?
Use it to split a large coding or investigation task into worker assignments, monitor their progress, and produce one complete response from their results.
Why use it?
It reduces the need to manage separate agents and manually assemble their findings. It also helps keep research, implementation, checking, and final review organized.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: installed under .agents/ (shared by several agents).

This is vudovn/ag-kit's own configuration. It tells Claude Code how to work on ag-kit 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 ag-kit configures →

About the project

AG Kit is a toolkit that gives Google Antigravity coding agents a structured workspace with rules, skills, specialist agents, workflows, persistent memory, orchestration, MCP guidance, and a safety hook. It is for building and operating agent workflows in Antigravity, and its catalogue entries provide parts of that workspace contract.

vudovn/ag-kit · 8,199 stars · on GitHub · ag-kit.unikorn.vn

Reuse

Borrowing it

Nothing to install: this file belongs to vudovn/ag-kit. 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/vudovn/ag-kit/main/.agents/skills/coordinator-mode/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/vudovn/ag-kit

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 coordinator-mode

README.md
[![agentmods](https://agentmods.dev/badge/skills/vudovn/ag-kit/coordinator-mode/github.svg)](https://agentmods.dev/skills/vudovn/ag-kit/coordinator-mode)
Your own site
<a href="https://agentmods.dev/skills/vudovn/ag-kit/coordinator-mode"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/coordinator-mode/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 coordinator-mode

Your own site · 80×15
<a href="https://agentmods.dev/skills/vudovn/ag-kit/coordinator-mode"><img src="https://agentmods.dev/badge/skills/vudovn/ag-kit/coordinator-mode.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,740 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 195
    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 $0.00035 $0.01740
Opus 5.5 $0.00014 $0.00696
Sonnet 5.5 $0.00007 $0.00348
Haiku 4.5 $0.00003 $0.00174

Measured 1mo ago against content hash a3c074d5e876, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

coordinator-mode 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/skills/coordinator-mode/SKILL.md · 210 lines

How it starts

The opening of the file, as written. The whole thing — 210 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Coordinator Mode — Multi-Agent Orchestration

Distilled from production-proven coordinator patterns. Transforms sequential agent chains into intelligent parallel orchestration.

Overview

The Coordinator is a specialized orchestration mode where you become the conductor — decomposing complex tasks into worker subtasks, dispatching them in parallel where safe, and synthesizing results into cohesive output.

You are NOT a worker. You are the coordinator. Your job is to think, plan, delegate, and synthesize — not to write code directly.


Coordinator Lifecycle

User Request
    ↓
1. DECOMPOSE — Break task into worker subtasks
    ↓
2. CLASSIFY — Mark each subtask: Research | Implementation | Verification
    ↓
3. DISPATCH — Launch workers (parallel for reads, sequential for writes)
    ↓
4. MONITOR — Track worker completion notifications
    ↓
5. SYNTHESIZE — Combine results into unified response
    ↓
6. VERIFY — Ensure completeness before reporting to user

Phase-Based Workflow

Phase Purpose Concurrency Worker Type
Research Gather information, explore codebase ✅ Fully parallel Read-only agents
Synthesis Analyze findings, plan approach ❌ Coordinator only No workers
Implementation Make changes to code/files ⚠️ Sequential per file set Write-capable agents
Verification Test, lint, validate changes ✅ Parallel (independent) Test/security agents

🔴 Rule: NEVER skip the Synthesis phase. Research → direct Implementation = poor results.


Concurrency Rules

Safe to Parallelize

  • ✅ Multiple agents reading different files
  • ✅ Security audit + performance audit (read-only)
  • ✅ Test runner + linter (independent)
  • ✅ Exploring different directories

Must Be Sequential

  • ❌ Two agents writing to the same file
  • ❌ Implementation that depends on another agent's output
  • ❌ Database migration + code that uses the new schema
  • ❌ API change + frontend that consumes the API

Read the full file on GitHub · 210 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 · 210 lines · 35 tokens per session scan A a3c074d5e876

Subscribe to this mod's changes

coordinator-mode is a skill published in the GitHub repository vudovn/ag-kit (8,199 stars, last pushed 3d ago), licensed MIT. It adds 35 tokens to every session and 1,740 once invoked, about $0.0001 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.

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