Everything-Claude-Code Agent Harness

Name: Everything-Claude-Code Agent Harness Review
Item: Everything-Claude-Code Agent Harness
Rating: 4.5
Author: Aaron Matthews

Skill Setup & Config Recommended

Works inClaude Code

Recommended Scanned — metadata only

Battle-tested at Anthropic hackathon. 5-layer guard against observer loop prevention, memory explosion mitigation, and taint mode for I/O safety.

Comprehensive harness with 38 specialized subagents, 156+ skills, 72 commands, session management via SQLite, and AgentShield security integration (102 rules, 1,282 tests). Built at Anthropic hackathon.

Deploy a security-hardened multi-agent system for client work
Use pre-built specialized agents for common development tasks
Manage agent sessions with built-in persistence and audit logs

229,084 starsMIT (commercial OK)FreeQuick setup

Why it matters

Battle-tested at Anthropic hackathon. 5-layer guard against observer loop prevention, memory explosion mitigation, and taint mode for I/O safety. AgentShield integration.

Best for

Power users and consulting teams building production Claude Code deployments who need a comprehensive, security-hardened agent harness as a starting point.

Works in

Claude Code Claude Cowork Claude Chat

Source

https://github.com/affaan-m/ECC

By affaan-m

How to Get It

Option 1: Claude Desktop App (Code Mode)Click the + button next to the prompt box → Plugins → Add plugin. Search and click Install. Skills work in Claude Code only.

Option 2: Paste into Claude CodeCopy the command below and paste it into your conversation. Claude will install it.

Command

In Claude Code: /plugin marketplace add https://github.com/affaan-m/ECC then /plugin install ecc@ecc. Manual alternative (do not combine with the plugin path): npx ecc-install --profile minimal --target claude.

Tip: Paste this into a Claude Code conversation. Verify command matches your Claude Code version.

First thing to try

After installing, paste this into Claude:

Help me deploy a security-hardened multi-agent system for client work

CostFree

Trust Signals Auto-scanned

Stars229,084Contributors290Last updated2026-07-13LicenseMIT (OK for commercial use)Known CVEsNone foundSources: GitHub Advisory Database + OSV.dev · Scanned 2026-07-20 · scanner vattempted-no-data

Community Pulse Active

Discussed on Hacker News, Reddit

Claude code is not on the same level as Codex — Reddit · 789 pts
Everything Claude Code: performance optimization system for AI agent harnesses — Hacker News · 2 pts

2 mentions across 2 sources

Reviewer notes

Auto-scanned review. These are observations, not a security certification.

catalog_hygiene stale-eval refresh: Scored from trust signals (evidence-eval-v1): 226,352 GitHub stars; 158 contributors; last commit 2d ago; license MIT.

Things to check

Requires SQLite setup and understanding of 38 subagent APIs; not a drop-in replacement for simple code generation. Performance at scale with 156+ skills and 102 security rules untested in production.

How to evaluate tools before deploying →

Data shown here comes from public APIs and automated scanning. Reviewer notes reflect one person's experience. This is not a security certification or legal recommendation. Always evaluate tools according to your own organization's policies.

Evaluation Scores

Evaluation

Ease of Use

4/5

Versatility

5/5

Reliability

5/5

Security

4/5

Overall score4.50 / 5.00 RecommendedEvaluatedJul 2026

catalog_hygiene stale-eval refresh: Scored from trust signals (evidence-eval-v1): 226,352 GitHub stars; 158 contributors; last commit 2d ago; license MIT.

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