Project comparison

Book To Skill vs ECC

Compare adoption, momentum, maintenance health, and project basics before choosing which tool to evaluate deeper.

Book To Skill

Turn any technical book PDF into a Claude Code skill — ready to study, reference, and use while you work.

Best matched with other agent tools.

27.5K

Stars

+2.7K

Weekly

86/100

Health

ECC

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

Best matched with other agent tools.

252.1K

Stars

+52.6K

Weekly

95/100

Health

Quick Take

Adoption

ECC has the larger GitHub footprint with 252.1K stars.

Momentum

ECC is currently growing faster at +52.6K stars this week.

Maintenance

ECC has the stronger automated maintenance signal at 95/100. This is not a security or fit verdict.

Side-by-side evidence

Use these signals to narrow your choice, then confirm setup, license, and fit upstream.

Signal	Book To Skill	ECC
Evidence status	Basic listing· 1d ago	Recently verified· 1d ago
GitHub stars	27.5K	252.1K
Weekly growth	+2.7K	+52.6K
Health score	Strong86/100

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