ECC

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor

9.4 Our editorial score, no user reviews yet Open source

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Our verdict

A well-maintained, widely adopted project. This assessment is derived from GitHub's own repository metrics on 2026-08-24, not from hands-on testing.

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond. The project is written primarily in JavaScript, released under MIT, and has 242,903 stars and 36,758 forks on GitHub. 318 contributors have committed to it, and the most recent push was 2026-08-24. The latest tagged release is v2.1.0 (2026-07-27). Figures come from the GitHub API on 2026-08-24 and are refreshed daily; the score below weighs adoption, maintenance, release discipline, contributor breadth, licence clarity and issue hygiene.

RepositoryGitHub API, refreshed daily

242.9kStars

36.8kForks

1.2kWatching

318Contributors

160Open issues

Licence: MIT
Language: JavaScript
Last push: 2026-08-24

View on GitHub

Releases

v2.1.0 2026-07-27 ECC 2.1.0: Plan Canvas, Kimi Harness, and Self-Hosted Compute
v2.0.0 2026-06-10 ECC 2.0.0 — The Agent Harness Operating System
v2.0.0-rc.1 2026-05-25 v2.0.0-rc.1
v1.10.0 2026-04-05 ECC v1.10.0 — Surface Refresh, Operator Workflows, and ECC 2.0 Alpha
v1.9.0 2026-03-21 v1.9.0 — Selective Install, ECC Tools Pro, 12 Language Ecosystems
v1.8.0 2026-03-05 ECC v1.8.0 — Harness Performance & Cross-Platform Reliability

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Side by side

Tool	Our score	From	Free tier	Best for
ECC this page	9.4	—	Yes
Browser Use	9.3	—	Yes
Gemini CLI	9.2	—	Yes
Claude Mem	9.1	—	Yes
Firecrawl	9.1	$16	Yes	Developers building RAG pipelines and research agents	Visit
Hermes Agent	9.1	—	Yes
GitHub Copilot	9.0	$4	—

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ECC