- pi/core no longer expands the project name: its README and the bundled
- Downstream packagers need no changes. The package is still ecc-pi-core, the
- After npm publish, the release workflow polls the registry for up to five
ECC by Affaan Mustafa
Open-source add-on for Claude Code, Codex, OpenCode, Cursor and other coding agents: skills, commands, hooks, rules and memory that make the agent plan before it builds, verify changes with tests, review its own work from a fresh context and turn repeated wins into reusable skills. Installs as the ecc@ecc Claude Code plugin or through the npm package ecc-universal; ECC Pro is a hosted GitHub App for private repositories.
Agent tooling for cost, context and memory
New · Added to AgentGid on Oct 11, 2026Agent harness plugin and skill packOpen source · MITFree to start
Use it in: CLI
Price
Free + $19/mo
free tier available
Popularity
#11 in Agent tooling
Gid Score 50 / 100 · #11 of 65 ranked agent tools
Trend
Growing fast
usage up 92.1% over 30 days
Development
Actively updated
latest 2.2.3, 20d ago
Community
285K GitHub stars
9,377 package downloads a week
Usage data: latest readings Oct 18 to Oct 21, 2026, last checked Oct 21, 06:35 UTC. Date of each number
What ECC does
ECC is an agent harness plugin and skill pack from Affaan Mustafa, first released in January 2026. You use it through a command-line tool. Paid plans start at $19 a month; there is a free tier.
Key facts
| Maker | Affaan Mustafa |
|---|---|
| Type | Agent harness plugin and skill pack |
| First released | January 2026 |
| License | MIT |
| Interfaces | CLI |
| Main language | JavaScript |
| Open issues and PRs | 244 |
Pricing
The toolkit is free and open source (MIT). GitHub App: Free on public repositories (10 analyses a month); Pro $19 per seat a month for private repositories; Enterprise on request.
Source: official pricing page, checked Oct 11, 2026. Prices change often; confirm before you buy.
ECC pricing history since 2024 · Compare prices of all agents
Quick answers
- Free to start?Yes
- Open source?Yes (MIT)
- Where you use itCLI
- Closest alternativeOpenShell · all alternatives
What's new in ECC: October 2026 so far
October brought a maintenance release focused on refining core package behavior and improving release processes.
- pi/core no longer expands the project name in its README and bundled assets
1 release this month · summarised from the official release notes · all months
AgentGid articles about ECC
Get started with ECC
| npm | npm install -g ecc-universal |
|---|
These commands use the packages tracked on this page. The vendor may recommend a different installer.
ECC alternatives
Best ECC alternatives compared · All agent tooling for cost, context and memory
| # | Agent | Gid Score | Downloads 7d | 7d | 30d | Stars | Latest release | Price | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |
OpenShellNVIDIA |
77 | 101K | down 14.1% | up 381.4% | 16.8K+103/day | 0.1.5yesterday | Free (OSS) | |||
| 2 |
|
72 | 22.9M | up 4.3% | — | 61.7K+79/day | 1.104.5today | Free (OSS) | |||
| 3 |
NVIDIA NemoClawNVIDIA |
69 | — | — | — | 22.8K+10/day | — | Free (OSS) | |||
| 4 |
|
64 | 9.5M | down 17.1% | up 17.7% | 36.1K+48/day | 4.66.0yesterday | Free + $29/mo | |||
| 5 |
|
64 | 2M | down 19.8% | up 0.3% | 194K+350/day | 2.11.04mo ago | Free + $16/mo | |||
| 6 |
|
60 | 3.2M | down 14.5% | up 21.9% | 14.5K+21/day | 2.11.2yesterday | Free + $150/mo | |||
| No agents match that filter. | |||||||||||
Tools used with ECC
What 29 public GitHub projects that depend on ECC use with it, from their dependency files.
- TypeScript51.7%
- React48.3%
- ESLint34.5%
- Vitest31.0%
- Tailwind CSS31.0%
- clsx27.6%
- Vite24.1%
- Tailwind Merge24.1%
- Zod24.1%
- Testing Library20.7%
Used far more often here than in AI-built projects overall: what sets ECC projects apart.
- React Big Calendar6.9% · 47.6×
- react-pdf6.9% · 20.4×
- pdfplumber6.9% · 12.6×
- Clerk10.3% · 11.3×
- Capacitor6.9% · 9.1×
- bcrypt (Python)6.9% · 7.6×
- passlib6.9% · 7.1×
- Socket.IO Client6.9% · 6.3×
Ratings from people who use ECC
No ratings yet. Used ECC? Rate it and say what it is good and bad at.
ECC news
-
10 agents added to AgentGid
Paperclip, Graphify, Agent-Reach, ECC, OpenMontage, Ruflo, OmniRoute, Claude Mem, Ragflow, Openhuman
What changed: recent ECC releases
5 stable releases in the last 90 days · Monthly summary · Full changelog
- 123 curated skills (language and framework patterns, testing/TDD, code review,
- Generated deterministically from the explicit include/exclude lists in
- The build fails on safety violations: non-allowlisted URL hosts, pipe-to-shell
- CI rebuilds pi/core on every PR and verifies it is up to date, then installs
- The release workflow additionally verifies that VERSION matches the tag and
- The compiled OpenCode payload is explicitly included in the npm package, and
Earlier releases
- GateGuard and governance capture recognize destructive PowerShell commands,
- Relative GateGuard exemption globs stay within the project root. Explicit
- Installer writes reject collisions with untracked user-owned files. Failed
- Guided setup revalidates its preview before ownership filtering, so files
- Uninstall respects ECCDRYRUN=1, including legacy Codex paths, and rejects
- Observer analysis retains observations on unsuccessful or unconfirmed
- Native Antigravity 2.0: ECC installs to
- Reliable uninstall: repeated selective installs keep a complete ownership
- Safer migrations: OpenCode uses ~/.config/opencode, while OpenCode and
- More workflows: Pi, Itô, agent evaluation, multi-model council, dev-team,
- @AlbertChiu777 in #2483
- @djpjronline-netizen in #2405
- Click elements or select text to attach numbered annotations
- Chat with the agent from a side rail while it works in the terminal
- Approve plan / Request changes buttons map directly onto /plan's CONFIRM gate
- Mermaid diagrams, tables, and task lists render natively; file edits live-reload the page
- Model- and harness-agnostic: a plain CLI + JSON protocol (ecc-plan-canvas), no Claude-only dependency
- ecc ito find: opt-in bridge to the canonical Itô CLI that submits a live, authenticated RFQ (it does not reserve capacity)
- 261 public skills across coding, research, security, media, enterprise ops, and agent workflows (rc.1 shipped 243) — plus 64 agents and 84 commands.
- The control-pane substrate — the foundation of the ECC 2.0 operating surface
- harness-neutral session adapters (ecc.session.v1) covering Claude Code, Codex, OpenCode, and dmux — one schema for "which agent is where, doing what"
- MCP inventory (ecc.mcp.v1) — one normalized view of every MCP server config across harnesses, with fragmentation/drift detection and secret redaction (it caught a real arg-carried key leak during…
- worktree-lifecycle service — deterministic merge-conflict prediction and safe GC for parallel agent worktrees
- orch- orchestrator skill family plus dynamic workflow team orchestration — multi-agent fan-out as a first-class surface.
ECC prices over time
Cheapest paid planMost expensive self-serve plan
ECC popularity and usage data
ECC was downloaded 9,377 times from npm in the week ending Oct 18, 2026, down 22.8% on the week before and up 92.1% over the last 30 days compared with the 30 before. The GitHub repository has 285K stars, 22,579 of them added in the last 30 days. The latest stable release is 2.2.3, published Oct 1, 2026; there were 2 stable releases in the past 30 days.
Download the raw daily series: ecc.csv
Gid Score breakdown
Adoption22
Community100
Attention—
Momentum96
Each component is scored 0 to 100 from public signals; a dash means no data for it. Methodology.
How fresh these numbers are
| Number | Latest reading | Last checked |
|---|---|---|
| Package downloads | Oct 18, 2026 | Oct 21, 06:27 UTC |
| GitHub stars | Oct 21, 2026 | Oct 21, 06:32 UTC |
| Website rank (Tranco) | Oct 20, 2026 | Oct 21, 06:35 UTC |
We fetch every source once a day. Registries publish downloads and page views a day or two late, so their latest reading trails the check. A reading more than 4 days old is marked out of date; the Gid Score still uses it until a newer one arrives.
ECC FAQ
How much does ECC cost?
The toolkit is free and open source (MIT). GitHub App: Free on public repositories (10 analyses a month); Pro $19 per seat a month for private repositories; Enterprise on request.
Is ECC open source?
Yes. ECC is open source, released under the MIT license.
How popular is ECC?
ECC was downloaded 9,377 times from npm in the week ending Oct 18, 2026, down 22.8% on the week before and up 92.1% over the last 30 days compared with the 30 before. The GitHub repository has 285K stars, 22,579 of them added in the last 30 days. The latest stable release is 2.2.3, published Oct 1, 2026; there were 2 stable releases in the past 30 days.
What is the latest version of ECC?
The latest stable release we track is 2.2.3, published on Oct 1, 2026.
What are the alternatives to ECC?
The closest alternatives in the same category by Gid Score are OpenShell, LiteLLM, NVIDIA NemoClaw, Langfuse.
For the makers of ECC badges, corrections
Add a live badge to your README or site:
[](https://agentgid.com/agents/ecc/)[](https://agentgid.com/agents/ecc/)[](https://agentgid.com/agents/ecc/)Something wrong or outdated on this page? Send a correction with a link to the official source. More for makers.
Where these numbers come from
npm: ecc-universal. GitHub: affaan-m/ecc. Site rank: ecc.tools on the Tranco list. See data sources for how each one is collected.
Product facts and pricing were checked against: ecc.tools, github.com, npmjs.com.