ECC Tools: Open Harness System and GitHub App for Coding Agents

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ECC Tools provides a cross-platform harness system for coding assistants such as Claude Code, Codex, Cursor, and OpenCode. It combines an open-source toolkit, an Opus 4.6-powered security auditor called AgentShield, and a GitHub App that transforms repository history into reusable skills.

Key points

  1. Cross-harness compatibility: Works across Claude Code, Codex, Cursor, and OpenCode, packaging 261 skills, 64 agents, and 84 commands in its open-source tier.
  2. Three-layer architecture: Combines an MIT-licensed distribution layer, the AgentShield protection layer with 102 security rules, and the ECC 2.0 operator control plane.
  3. AgentShield security: Leverages Opus 4.6 to audit agent configurations and scan sessions and pull requests for risky configurations.
  4. Learning loop with anti-bloat: Derives atomic instincts from session corrections locally and automatically decays unused patterns to prevent prompt bloat.
  5. GitHub App pricing: Offers a free tier for public repositories, a Pro tier at $19 per seat/month for private repositories, and custom Enterprise options with SSO and audit logs.

Why it matters

Development teams using AI coding tools frequently struggle with inconsistent standards and unvetted configurations. ECC Tools centralises best practices and security audits across multiple popular harnesses without locking teams into a single IDE or vendor.

Analysis

ECC Tools tackles context drift and agent governance directly within developer workflows. By parsing session history alongside Git commits, it extracts actionable conventions while using scheduled pruning to eliminate inactive instructions before context bloat degrades model performance. The requirement for manual pull request approvals keeps human oversight firmly integrated into automated agent training.

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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