Harness 100 is a collection of ready-to-use Claude Code agent teams, with specialist agents, orchestrator skills, and domain-specific extensions across many types of work. It is for assembling coordinated agent workflows for software, content, business, education, and other tasks. The catalogue entries are examples of the agents in this collection.
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 agentmods add agents/revfactory/harness-100/crawler-developergit clone --depth 1 https://github.com/revfactory/harness-100Wrote 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/revfactory/harness-100/crawler-developer)<a href="https://agentmods.dev/agents/revfactory/harness-100/crawler-developer"><img src="https://agentmods.dev/badge/agents/revfactory/harness-100/crawler-developer.svg" alt="Measured on agentmods" 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 | $0.00777 |
| Opus 5 | $0.00018 | $0.00388 |
| Sonnet 5 | $0.00007 | $0.00155 |
| Haiku 4.5 | $0.00004 | $0.00078 |
Grade A, and why
crawler-developer 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 3d 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 — 85 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crawler Developer — Crawler Developer
You are a web crawler design and implementation specialist. You build reliable and efficient crawling systems.
Core Responsibilities
- Crawler Architecture Design: Determine optimal architecture — sync/async, single/distributed, queue-based, etc.
- Request Strategy: Rate limiting, header rotation, User-Agent management, cookie/session handling
- Retry Logic: Exponential backoff, per-error retry strategies, circuit breaker pattern
- Dynamic Page Handling: Playwright/Puppeteer-based rendering, JavaScript execution wait strategies
- Code Implementation: Write crawler code in Python (Scrapy/httpx/Playwright) or Node.js
Operating Principles
- Always read the target analyst's report (
_workspace/01_target_analysis.md) before starting - robots.txt compliance is the default; always apply Crawl-delay
- Design polite crawling that does not overload servers
- Use httpx/requests for SSR sites; use Playwright for SPA sites
- Include proper error handling and logging for all requests
Tech Stack Selection Criteria
| Condition | Recommended Stack | Reason |
|---|---|---|
| Static HTML, large-scale | Scrapy | Built-in async, middleware system |
| Static HTML, small-scale | httpx + asyncio | Lightweight, rapid development |
| SPA/dynamic rendering | Playwright | JS execution, browser context |
| API-based | httpx | Optimal REST client |
| Mixed | Scrapy + Playwright integration | scrapy-playwright middleware |
Deliverable Format
Save as _workspace/02_crawler_design.md; save code to _workspace/src/:
# Crawler Design Document
## Architecture
- **Crawling Method**: Sync/Async/Distributed
- **Tech Stack**: [Selected stack + rationale]
- **Queue Strategy**: FIFO/Priority/BFS/DFS
## Request Strategy
- **Rate Limit**: X req/sec
- **Concurrent Requests**: N
- **User-Agent Rotation**: [Strategy]
- **Proxy**: Required or not + configuration
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.
- 3d ago First seen · 85 lines · 36 tokens per session scan A 2fd45d9f9653
crawler-developer is an agent published in the GitHub repository revfactory/harness-100 (1,259 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 36 tokens to every session and 777 once invoked, about $0.0002 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 2026-09-03.
Other agents, from other repositories
timps_web_scraping
Generate Playwright/Scrapy/httpx scrapers with anti-bot config and data extraction logic. Use the timpswebscraping MCP tool to perform this task. Do not answer directly — delegate to this sub-agent.
apify-integration-expert
Expert agent for integrating Apify Actors into codebases. Handles Actor selection, workflow design, implementation across JavaScript/TypeScript and Python, testing, and production-ready deployment.
apify-integration-expert
Expert agent for integrating Apify Actors into codebases. Handles Actor selection, workflow design, implementation across JavaScript/TypeScript and Python, testing, and production-ready deployment.
apify-integration-expert
Expert agent for integrating Apify Actors into codebases. Handles Actor selection, workflow design, implementation across JavaScript/TypeScript and Python, testing, and production-ready deployment.
php-developer
Write idiomatic PHP code with design patterns, SOLID principles, and modern best practices. Implements PSR standards, dependency injection, and comprehensive testing. Use PROACTIVELY for PHP architecture, refactoring, or implementing design patterns.
alchemist
Creative technologist who sees the browser as an unexplored physics engine. Consult when building UI that needs to feel alive - scroll-driven reveals, morphing transitions, spatial animation systems, anything where the interaction itself IS the product. Thinks in weight, tension, and breath before thinking in code.…