A development mode that organizes coding work around plans, separate sessions, and checks for proof that tasks are complete.

Use it to plan tasks, assign work, review changes, verify results, document outcomes, and apply safety checks during development.

It helps reduce unfinished or poorly checked changes by requiring verification and keeping work from different sessions isolated.

ultrawork — Plugin for Claude Code by mnthe: A development mode that organizes coding work around plans…

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.

Claude Code

/plugin marketplace add mnthe/hardworker-marketplace

agentmods

npx agentmods add plugins/mnthe/hardworker-marketplace/ultrawork

Clone the repo

git clone --depth 1 https://github.com/mnthe/hardworker-marketplace

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.

README.md

[![agentmods](https://agentmods.dev/badge/plugins/mnthe/hardworker-marketplace/ultrawork.svg)](https://agentmods.dev/plugins/mnthe/hardworker-marketplace/ultrawork)

Your own site

<a href="https://agentmods.dev/plugins/mnthe/hardworker-marketplace/ultrawork"><img src="https://agentmods.dev/badge/plugins/mnthe/hardworker-marketplace/ultrawork.svg" alt="Measured on agentmods" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured The manifest loads nothing itself; its 15 skills, 9 commands cost 810 tokens a session between them.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

ultrawork 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 4d 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.

plugins/ultrawork/.claude-plugin/plugin.json · 31 lines

What it actually says

{
  "name": "ultrawork",
  "version": "1.17.0",
  "description": "Strict verification-first development mode with Session ID-based isolation (Bun cross-platform version).",
  "author": {
    "name": "mnthe"
  },
  "keywords": [
    "ultrawork",
    "verification",
    "planning",
    "task-management",
    "tdd",
    "evidence-based",
    "typescript",
    "cross-platform"
  ],
  "license": "MIT",
  "commands": "./commands/",
  "agents": [
    "./agents/explorer/AGENT.md",
    "./agents/planner/AGENT.md",
    "./agents/reviewer/AGENT.md",
    "./agents/scope-analyzer/AGENT.md",
    "./agents/verifier/AGENT.md",
    "./agents/worker/AGENT.md",
    "./agents/documenter/AGENT.md",
    "./agents/guardrail/AGENT.md"
  ],
  "skills": "./skills/"
}

Contents

What it installs

The manifest is a name and a version. 15 skills, 9 commands travel with it, and installing the plugin installs all of them — 810 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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.

4d ago First seen · 31 lines scan A 96f38c21bc2c

Subscribe to this mod's changes

ultrawork is a plugin published in the GitHub repository mnthe/hardworker-marketplace (4 stars, last pushed 4mo ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-08-31.

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