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Awesome Harness Engineering
Awesome list for AI agent harness engineering: tools, patterns, evals, memory, MCP, permissions, observability, and orchestration.
ai-boost/awesome-harness-engineering
#agent-harness
#agent-memory
#agent-orchestration
#ai-agent-harness
#ai-agents
#awesome-list
#context-engineering
#harness-engineering
#mcp
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- 170
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- 108
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- 672
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- 260
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DietrichGebert/ponytail
Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.
AI dev
Stack
GitHub topics
- Updated
- 2026-10-16
- Lists
- 2 list mentions
- First commit
- 2026-06-12
- License
- MIT
- Issues
- 23 open
165,266
stars
- Forks
- 8,927
- Commits
- 355 commits
- Star growth, last 7 days
- 0 0.0%
- Commit velocity, last 7 days
- 0 0.0%
wshobson/agents
Multi-harness agentic plugin marketplace for Claude Code, Codex, Cursor, OpenCode, GitHub Copilot, and Google Antigravity
AI dev
GitHub topics
- Updated
- 2026-09-07
- Lists
- 4 list mentions
- First commit
- 2025-07-24
- License
- MIT
- Issues
- 8 open
39,600
stars
- Forks
- 4,220
- Commits
- 569 commits
- Star growth, last 7 days
- No 7-day history
- Commit velocity, last 7 days
- No 7-day history
langfuse/langfuse
🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
AI dev
GitHub topics
- Updated
- 2026-10-16
- Lists
- 13 list mentions
- First commit
- 2023-05-18
- License
- NOASSERTION
- Issues
- 1,056 open
35,902
stars
- Forks
- 3,996
- Commits
- 10,240 commits
- Star growth, last 7 days
- 0 0.0%
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- 0 0.0%
chopratejas/headroom
Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. 60-95% fewer tokens, same answers. Library, proxy, MCP server.
AI dev
GitHub topics
- Updated
- 2026-06-18
- Lists
- 3 list mentions
- First commit
- 2026-01-07
- License
- Apache-2.0
- Issues
- 309 open
34,860
stars
- Forks
- 2,361
- Commits
- 1,640 commits
- Star growth, last 7 days
- No 7-day history
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- No 7-day history
promptfoo/promptfoo
Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.
AI dev
GitHub topics
- Updated
- 2026-10-14
- Lists
- 9 list mentions
- First commit
- 2023-03-31
- License
- MIT
- Issues
- 713 open
25,991
stars
- Forks
- 2,476
- Commits
- 10,381 commits
- Star growth, last 7 days
- 0 0.0%
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- 0 0.0%
comet-ml/opik
Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations, and production-ready dashboards.
AI dev
GitHub topics
- Updated
- 2026-10-16
- Lists
- 11 list mentions
- First commit
- 2024-09-02
- License
- Apache-2.0
- Issues
- 189 open
22,644
stars
- Forks
- 1,864
- Commits
- 7,548 commits
- Star growth, last 7 days
- +29 +0.1%
- Commit velocity, last 7 days
- +22 +0.3%
dottxt-ai/outlines
Structured Outputs
AI dev
GitHub topics
- Updated
- 2026-09-09
- Lists
- 4 list mentions
- First commit
- 2023-03-17
- License
- Apache-2.0
- Issues
- 159 open
15,775
stars
- Forks
- 871
- Commits
- 1,325 commits
- Star growth, last 7 days
- No 7-day history
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- No 7-day history
Arize-ai/phoenix
AI Observability & Evaluation
AI dev
GitHub topics
- Updated
- 2026-10-16
- Lists
- 7 list mentions
- First commit
- 2022-11-09
- License
- NOASSERTION
- Issues
- 1,156 open
11,870
stars
- Forks
- 1,208
- Commits
- 10,314 commits
- Star growth, last 7 days
- 0 0.0%
- Commit velocity, last 7 days
- 0 0.0%
cobusgreyling/loop-engineering
Practical patterns, starters & CLI tools for loop engineering with AI coding agents. Design systems that prompt and orchestrate agents (inspired by Addy Osmani and Boris Cherny). Includes loop-audit, loop-init, loop-cost.
AI dev
Stack
GitHub topics
- Updated
- 2026-10-17
- Lists
- 3 list mentions
- First commit
- 2026-06-09
- License
- MIT
- Issues
- 12 open
11,565
stars
- Forks
- 1,594
- Commits
- 588 commits
- Star growth, last 7 days
- 0 0.0%
- Commit velocity, last 7 days
- 0 0.0%
Helicone/helicone
🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓
AI dev
GitHub topics
- Updated
- 2026-10-10
- Lists
- 8 list mentions
- First commit
- 2022-11-29
- License
- Apache-2.0
- Issues
- 170 open
6,226
stars
- Forks
- 685
- Commits
- 5,488 commits
- Star growth, last 7 days
- +15 +0.2%
- Commit velocity, last 7 days
- 0 0.0%
wquguru/harness-books
📚 Two books on harness engineering — the design philosophies behind Claude Code & Codex: constraints, query loops, context governance, multi-agent verification. harness-books.agentway.dev
AI dev
Stack
GitHub topics
- Updated
- 2026-04-19
- Lists
- 2 list mentions
- First commit
- 2026-04-01
- License
- Unknown
- Issues
- 5 open
3,081
stars
- Forks
- 364
- Commits
- 39 commits
- Star growth, last 7 days
- No 7-day history
- Commit velocity, last 7 days
- No 7-day history
GammaLabTechnologies/harmonist
Portable AI agent orchestration with mechanical protocol enforcement. 186 agents, zero runtime dependencies.
Stack
GitHub topics
- Updated
- 2026-06-09
- Lists
- 1 list mention
- First commit
- 2026-04-23
- License
- MIT
- Issues
- 1 open
2,254
stars
- Forks
- 210
- Commits
- 10 commits
- Star growth, last 7 days
- 0 0.0%
- Commit velocity, last 7 days
- 0 0.0%