Agent Harness Reference | Agent Skills Atlas

About this skill

Field reference for Claude Code and GitHub Copilot CLI hook contracts. Covers hook locations, events, matchers, payloads, decisions, exit codes, timeouts, plugin roots, and cloud limits with official URLs and versioned probes. Use for harness contract, copilot cli hook behavior, hook payload format, stale plugin root, Errno 2 dispatch.py, or before changing cross-harness hooks. Do NOT use to run the porting campaign (use ai-agents-portability-campaign).

Quick start

Copy the install prompt. Use the green button above this README.
Send it to your agent. Paste it into your coding agent’s chat and send.
Review the setup. Your agent checks the skill’s instructions, requirements, and installation scope.

Installation guide →

Review, license & listing details

Review the source before using this skill

This is an imported listing. We haven’t certified its safety, license, or compatibility. Skills may include executable scripts.

Automated security scan: Unavailable

HTTP 404

About scan coverage and limitations

Original listing metadata

Original name

agent-harness-reference

Original description

Field reference for Claude Code and GitHub Copilot CLI hook contracts. Covers hook locations, events, matchers, payloads, decisions, exit codes, timeouts, plugin roots, and cloud limits with official URLs and versioned probes. Use for `harness contract`, `copilot cli hook behavior`, `hook payload format`, `stale plugin root`, `Errno 2 _dispatch.py`, or before changing cross-harness hooks. Do NOT use to run the porting campaign (use `ai-agents-portability-campaign`).

About this listing

Category: General
Reported license: MIT
Listing language (estimated): English
Review status: Not individually reviewed
Agent compatibility: Atlas installation supports Claude Code, Codex, and Cursor. Skill-specific dependencies and features are checked during setup.