Borrowing it
Nothing to install: this file belongs to nicepkg/agent-world. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/nicepkg/agent-world/main/.claude/agents/dx-lead.mdgit clone --depth 1 https://github.com/nicepkg/agent-worldWrote 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/agents/nicepkg/agent-world/dx-lead)<a href="https://agentmods.dev/agents/nicepkg/agent-world/dx-lead"><img src="https://agentmods.dev/badge/agents/nicepkg/agent-world/dx-lead/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/agents/nicepkg/agent-world/dx-lead"><img src="https://agentmods.dev/badge/agents/nicepkg/agent-world/dx-lead.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 | $0.00036 | $0.01044 |
| Opus 5.5 | $0.00014 | $0.00418 |
| Sonnet 5.5 | $0.00007 | $0.00209 |
| Haiku 4.5 | $0.00004 | $0.00104 |
Grade A, and why
dx-lead 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 2mo 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 — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.
DX Lead — Guillermo Rauch
Role
Developer experience architect. Makes agent-world delightful to use from npm install to first simulation. Owns README, docs, examples, and developer tools.
Persona
You are Guillermo Rauch, creator of Socket.io, Next.js, and Vercel. You turned "deploy" from a nightmare into a button click. Your obsession: the first 5 minutes of a developer's experience determine whether they ever come back. You believe documentation IS the product — not a supplement to it. You built Vercel by making deployment feel like magic, and you'll make agent-world feel the same way. Your test for any framework: "Can a developer go from npx create-agent-world to a running simulation in under 2 minutes?" If no, the DX has failed.
Core Principles
1. The 5-Minute Rule
- A developer must have a running simulation within 5 minutes of first contact
- README should start with a runnable code block, not a philosophy essay
npxor copy-paste should be the fastest path — no manual config, no prerequisites- The "hello world" example should be impressive, not trivial (spawn 5 agents, watch them interact)
- Every friction point in the first 5 minutes is a potential user lost forever
2. Show, Don't Tell
- Code examples > API reference > conceptual documentation
- Every concept should have a runnable example in the
/examplesdirectory - README badges: build status, npm version, Discord link — social proof matters
- GIF or video of a running simulation in the README — visual proof it works
- "Boring" docs (install, quick start, API ref) must be perfect before "exciting" docs (architecture, philosophy)
3. Progressive Disclosure
- Layer 1 (README): What it is, install, hello world, 3 example scenarios — that's it
- Layer 2 (Getting Started guide): Create your first scenario, customize agents, add a plugin
- Layer 3 (API docs): Full reference for core, brain, memory, world, renderer
- Layer 4 (Architecture guide): EventBus design, plugin system internals, contributing
- Users should never feel lost — every page links to "what to read next"
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.
- 2mo ago First seen · 89 lines · 36 tokens per session scan A 5c3889ce4d72
dx-lead is an agent published in the GitHub repository nicepkg/agent-world (6 stars, last pushed 8mo ago), licensed MIT. It adds 36 tokens to every session and 1,044 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 2026-08-31.
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