| What it does | A harness-agnostic framework for AI coding tools
| Up to 3x more work with the same tokens on Claude Code and Codex
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| Stage | Not given
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| Founded | Not given
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| Based in | Not given
| BR
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| Pricing model | Open source
| Freemium
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| Pricing | Not given
| Basic FREE: always free with measurement and monitoring tools. Pró: US$9/month with 7 days free trial, includes Delta Read, Code Finder, Terminal Guide, Stop Loss, Budget Cap, and Git Admin. Ultra: US$12/month with 7 days free trial, adds Cheap Swarm and security features. GIGA UNLIMITED: US$27/mont
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| Key features | - Configure plugins, skills, MCP servers, and hooks in a single harness.yaml file
- Observatory: monitor every session, tool call, and minute of activity
- Memory: persistent knowledge graph for AI orientation
- Comparator: run prompts across Claude Code, Cursor, and Copilot side by side
- Import existing configs from multiple AI coding tools automatically
- Share complete setup via single file with teammates
- Harness Parity: verify all connected AI tools end up with identical configuration
- Cross-harness compatibility table showing actual tool capabilities
| - Deep Scan: measures token consumption by analyzing conversation history
- Smart Compress: compresses requests without calling the model
- Delta Read: reduces rereading of context across turns
- Cheap Swarm: routes lightweight tasks to cheaper models with 26 task classes
- Secret Lock: masks passwords and keys before they enter conversations
- Code Deck: 4 concurrent agent slots with 17+ CLI options
- KanBan Sync: automatic task board synced with agent planning
- HarnessUp Flow: create agentic workflows on infinite canvas
- Board: infinite canvas for notes, images, and columns
- Stop Loss: budget cap to prevent exceeding spending limits
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| What makes it different | - Import-first approach: reads existing configs from all your tools and converges them before you write YAML
- No marketing gloss: capability table generated at build time from actual adapter code, not hand-maintained
- Portable across tools: single harness.yaml travels with you to every machine and tool
- Open source and free: no cost beyond existing Claude subscription
- Based on open specification: Harness Protocol is vendor-neutral and JSON Schema validated
| - Measures token waste with your own data before charging anything
- Reverses AI damage with one button undo functionality
- No login required to start measuring token usage
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 16 ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 20 | 0 |
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| Referring domains (Majestic) | 11 | 0 |
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Harness Kit
HarnessUp