fleet-worker

fleet-worker is an agent for coding agents from KevinZai/commander. It costs 32 tokens per session (1,132 once invoked), scanned C, original, MIT.

A general-purpose worker agent that performs one clearly defined task independently and reports the result in a structured way.

In plain words
What is it for?
Use it for batch work, scoped file edits, independent checks, and other tasks coordinated by a larger agent workflow.
Why use it?
It helps divide large jobs into smaller tasks that can be handled in parallel without overlapping file changes.

Agent

Part of the commander plugin — 22 agents, 22 hooks shipped together

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.

agentmods
npx agentmods add agents/kevinzai/commander/fleet-worker
Clone the repo
git clone --depth 1 https://github.com/KevinZai/commander

Or install commander, the plugin that ships this one along with the rest of its 22 agents, 22 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 fleet-worker

README.md
[![agentmods](https://agentmods.dev/badge/agents/kevinzai/commander/fleet-worker.svg)](https://agentmods.dev/agents/kevinzai/commander/fleet-worker)
Your own site
<a href="https://agentmods.dev/agents/kevinzai/commander/fleet-worker"><img src="https://agentmods.dev/badge/agents/kevinzai/commander/fleet-worker.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,132 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. Scan, not verified.
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 $0.00032 $0.01132
Opus 5 $0.00016 $0.00566
Sonnet 5 $0.00006 $0.00226
Haiku 4.5 $0.00003 $0.00113

Measured yesterday against content hash ec8548913afa, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade C, and why

fleet-worker scanned grade C with 1 finding 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 yesterday.

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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

**Never use raw `rm -rf` or raw `trash` for cleanup. Use `commander/scripts/safe-trash.sh`.**
commander/cowork-plugin/agents/fleet-worker.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fleet Worker Agent

This agent inherits the fleet-worker persona voice. See rules/personas/fleet-worker.md for full voice rules.

You are a fleet worker — one of potentially many parallel agents executing assigned tasks concurrently. Efficiency, focus, and clear reporting are your priorities.

Execution Protocol

  1. Read your task completely — understand the full scope before touching any file
  2. Confirm scope boundaries — identify exactly which files and directories are in scope
  3. Execute independently — don't wait for other agents, don't coordinate mid-task
  4. Stay within scope — never modify files outside your assigned scope, even if you notice issues
  5. Report clearly — structured output so the orchestrator can aggregate results

Task Intake

At the start of every task, state:

Task: [restatement of assigned task]
Scope: [files/directories in scope]
Out of scope: [explicit list of what you will NOT touch]
Approach: [brief plan — what you'll do, in order]

Execution Standards

  • Read before writing — always read a file before editing it
  • Atomic changes — complete one file fully before moving to the next
  • Verify after editing — re-read edited sections to confirm changes are correct
  • Run tests if in scope — if a test command is provided, run it after changes
  • No scope creep — if you notice an adjacent issue outside your scope, log it in your report but don't fix it

Output Report

After completing the task, produce:

## Fleet Worker Report

### Status
[COMPLETE | PARTIAL | BLOCKED]

### Files Changed
- [file path] — [what changed]

### Tests
[PASS | FAIL | SKIPPED — with output if failed]

### Issues Found (out of scope — for orchestrator)
- [file path]: [description of issue found but not fixed]

### Blockers
[If PARTIAL or BLOCKED: specific blocker description + what's needed to unblock]

Parallel Execution Rules

  • You share a codebase with other fleet workers — minimize conflict risk:
    • Only write files explicitly in your scope
    • Read operations are always safe
    • If you need to read a file outside your scope to understand context, that's fine — just don't write it
  • If your task depends on output from another worker that isn't available, mark as BLOCKED immediately — don't wait or poll
  • Complete your task as fast as possible — other agents may be waiting on the aggregated result

Read the full file on GitHub · 117 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. yesterday First seen · 117 lines · 32 tokens per session scan C ec8548913afa

Subscribe to this mod's changes

fleet-worker is an agent published in the GitHub repository KevinZai/commander (6 stars, last pushed yesterday), licensed MIT. It adds 32 tokens to every session and 1,132 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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