ECC

ECC is a content and tooling repository, not an agent runtime. The Claude Code plugin loads its Markdown subagent definitions, skills, commands and hooks; Node.js scripts handle installation, repair, sync and the ecc CLI. Each harness gets its own adapter, and the README's platform table rates them from stable (Claude Code) to instruction-only (GitHub Copilot).

Multi-agent work is delegated to the host. Subagents are definitions the host invokes; on Codex the sample roles run through Codex's own multi-agent feature and are steered with /agent. Claude agent files are not installed as Codex roles. The 2.0 notes add control-pane session adapters, a worktree lifecycle service that predicts conflicts between parallel agent worktrees, and orch-* orchestrator skills, but the README's file tree describes /orchestrate as 'prefer dmux-workflows or multi-workflow', and the README warns that Agent Teams cost extra tokens per teammate.

Memory is file-based. The Memory Vault keeps local Markdown under .ecc/memory/ (project and team) or ~/.ecc/memory/ (user), hooks distil sessions into summaries and learned instincts, and ecc memory handoff writes a note for another harness to recall. The vault is described as unreviewed context, not policy.

Several checkpoints are documented. The /plan command must wait for explicit user confirmation before code changes, and /plan-canvas offers a browser-based annotate-and-approve review of the plan. GateGuard hooks gate destructive shell commands before they run, and Codex hooks need an explicit user trust decision. The installer previews each harness, destination and hook profile and asks for one final confirmation before writing. The README does not describe pausing or editing a running subagent beyond what the host harness provides.

/plugin marketplace add https://github.com/affaan-m/ECC

# Claude Code (inside the app): add the marketplace, then install the plugin
/plugin marketplace add https://github.com/affaan-m/ECC
/plugin install ecc@ecc
/plugin list ecc@ecc

# Plan a feature; the planner waits for your confirmation
/ecc:plan "Add user authentication with OAuth"

# Codex CLI, from a terminal
codex plugin marketplace add affaan-m/ECC
codex plugin add ecc@ecc
codex plugin list --json

# Cursor project adapter, from a clone of the repo
./install.sh --profile minimal --target cursor

• Choose one install method per harness; stacking the Claude plugin with a manual install, or Codex sync with the Codex plugin, duplicates skills and hooks.
• Claude Code plugins cannot distribute rules; copy the rule packs you want from rules/ by hand.
• The README's guided setup pins npx ecc-universal@2.2.2 setup, but on 2026-09-30 the npm registry listed 2.2.1 as the latest version and no 2.2.2, so the pinned command may not resolve; the native plugin commands above do not depend on npm.
• The Claude plugin does not auto-enable bundled MCP servers; add them manually.
• Plugin hooks were silent no-ops on Node 21+ in early 2.0 builds (fixed in 2.0.0); the universal package needs Node.js 18 or newer and Claude Code 2.1 or newer for plugin setup.
• Open issues report Claude Code warning about unknown keys in the bundled hooks.json.

It ships an optional ecc-memory-mcp server and a catalog of MCP server configs, and the Claude plugin leaves them disabled by default. It is not an MCP client and its default connector set is a single server, chrome-devtools.

The repository is MIT licensed and free to use. A hosted GitHub App, ECC Pro, is sold separately for private repositories; the pricing page lists Pro at $19 per seat per month, and the toolkit itself is not gated behind it.

Mostly no. It supplies subagent definitions, Codex role configs, worktree tooling and orchestrator skills, and the host harness runs the agents. Coordination features beyond that depend on the harness, such as Codex multi-agent mode.

Claude Code (plugin), Codex (native plugin), and install targets for OpenCode, Cursor, Gemini CLI, Zed, Hermes, OpenClaw, Kimi Code and others. The README rates Claude Code as stable primary and most others as partial.

Everything Claude Code. The 1.x to 2.0 migration guide says the repository moved from affaan-m/everything-claude-code to affaan-m/ECC and the plugin id became ecc@ecc.