ecc vs gstack
Two of the top projects in Skills, plugins and prompts, side by side: who leads on each score part and who each one suits, then setup, license, activity and what each review found.
ecc
Agents, skills, hooks and rules bundle for Claude Code, Codex and other harnesses
gstack
Markdown slash-command skills that give Claude Code planning, review, QA and ship roles
Verdict
Both score 95; ecc ranks higher on stars, 294,466 to 138,536. Of the 4 score parts we measure for both, ecc leads on 1, gstack on 1 and 2 are even.
- Adoptionecc leads by 2 points, 100 to 98: close to even.
- FreshnessEven at 100.
- Maintenancegstack leads by 3 points, 96 to 93: close to even.
- Agent-readyEven at 70.
Pick ecc if you are
Developers running Claude Code or Codex who want a preset agent workflow
- Large bundle: 71 agents, 311 skills, hooks and rules in one install
- Guided setup wizard for Claude Code, Codex and Kimi Code with dry-run mode
Pick gstack if you are
Claude Code users wanting structured planning, review, QA and release workflows
- Claude Code is the only full-tier host; safety hooks like /careful and /freeze are enforced there
- Skills are plain Markdown, so they can be forked and edited
| What we compare | ecc | gstack |
|---|---|---|
| Score parts, out of 100 | ||
| Adoption | 100, widely used | 98, widely used |
| Freshness | 100, active | 100, active |
| Maintenance | 93, healthy | 96, healthy |
| Agent-ready | 70, partly | 70, partly |
| Facts from GitHub and the README | ||
| Stars | 294.5k | 138.5k |
| License | MIT (permissive) | MIT (permissive) |
| Last commit | Oct 2026 | Nov 2026 |
| Last release | Oct 2026 | Oct 2026 |
| Language | JavaScript | TypeScript |
| Docker | Yes | No |
| GPU | Not needed | Not needed |
| arm64 or Apple Silicon | Not stated | Mentioned |
ecc
ECC installs a plan, test, implement, review, verify workflow into coding agents. It ships 71 agents, 311 skills, 97 legacy command shims, hooks, selectable rules, session memory and the AgentShield scanner for prompts, hooks, MCP config and permissions. Native plugin paths exist for Claude Code and Codex; Cursor, OpenCode, Gemini, Zed and others get capability-limited adapters.
Who it is for: Developers running Claude Code or Codex who want a preset agent workflow
Strengths
- Large bundle: 71 agents, 311 skills, hooks and rules in one install
- Guided setup wizard for Claude Code, Codex and Kimi Code with dry-run mode
- Includes AgentShield scanning of MCP config, permissions, hooks and secrets
- MIT licensed; npm releases pinned per version tag
Weaknesses
- Feature parity varies; non-Claude harnesses are capability-limited adapters
- Claude plugins cannot ship rules, so rule packs need a manual copy
- Stacking install methods duplicates skills and hooks; README warns against it
- Private-repo GitHub App is paid (from $19/seat/month)
- no GPU
- Docker + Compose
- Needs Node.js 18+, Git, Claude Code 2.1+ (for plugin setup)
- Models: Claude Code, Codex, Kimi Code, Cursor, OpenCode
gstack
gstack is a set of Markdown skills, exposed as slash commands such as /office-hours, /plan-ceo-review, /review, /qa, /cso and /ship, that split a coding session into roles: product, architecture, design, review, QA, security and release. Setup is a git clone into ~/.claude/skills plus a Bun-based ./setup script that also builds a bundled browser for QA. Claude Code is the full-tier host; Codex, OpenCode, Cursor, Kiro and others are experimental.
Who it is for: Claude Code users wanting structured planning, review, QA and release workflows
Strengths
- Claude Code is the only full-tier host; safety hooks like /careful and /freeze are enforced there
- Skills are plain Markdown, so they can be forked and edited
- Team mode auto-updates for shared repos with no vendored files
- Installs for multiple agents (Codex, Cursor, OpenCode, Kiro, Copilot CLI) via --host flags
Weaknesses
- Non-Claude hosts are experimental or instruction-only, and safety skills only advise there
- Outside reviews need a second CLI (Codex or Claude Code) installed and signed in
- /cso needs a recent Bun with specific build flags plus a native C toolchain
- README leads with the author's productivity claims, not behavior of the skills
- no GPU
- Needs Claude Code, Git, Bun 1.3.3+ (1.4.2 tested), Node.js (Windows only), Codex CLI (optional, outside reviews), OpenAI API key (optional, design binary)
- Models: Claude (Opus 5.5), OpenAI GPT-6 Astra, OpenAI GPT-6.1 Sol, OpenAI gpt-5.5 and gpt-image-2 (design binary)
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