agent-harness-reference SKILL.md skillA
agent-harness-reference from rjmurillo/ai-agents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rjmurillo/ai-agents/agent-harness-reference@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rjmurillo/ai-agents
- Path
src/claude/skills/agent-harness-reference/SKILL.md- Versions recorded
- 5
- Latest version
- v1.1.0, committed Oct 12, 2026
- First version recorded
- Sep 15, 2026
- Size
- 21,278 bytes
- Repository stars
- 48
- License
- MIT
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 (in the ai-agents repository, use `ai-agents-portability-campaign`).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Agent Harness Reference Use this reference before changing a hook, dispatcher, generator, hook config, or runtime test. Do not repeat web research unless the refresh rules below say the recorded contract is stale. ## Triggers - `harness contract` - `copilot cli hook behavior` - `hook payload format` - `cross-harness hook change` - `refresh hook evidence` ## Process 1. Read `references/official-hook-contracts.md` for the authoritative row. 2. Read `references/probe-evidence.md` only for versioned runtime evidence. 3. Apply the repository policy in this file and the cited ADRs. 4. If a refresh condition applies, update sources, probes, tests, mirrors, and memory in the same change. 5. Mark an absent official answer `DOCS SILENT`. Do not infer it from Claude. ## Authority Order 1. `references/official-hook-contracts.md` records current official sources, pinned source commits, exact event sets, output fields, and docs gaps. 2. This file states the repository decisions derived from those contracts. 3. `references/probe-evidence.md` records versioned runtime observations. 4. ADR-068 and ADR-071 record the dispatcher and runtime verification choices. …
Read the whole file at its exact version.
How to install
mdr add rjmurillo/ai-agents/agent-harness-reference@sha256:21df514f3709e726The line at the top of this page pins the label v1.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_fgd5ajpvoarct24q)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 15, 2026 and Oct 12, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-10-12 | 927967b | 21,278 B | A | view · diff |
| v1.1.0 | 2026-09-27 | 6ad2025 | 21,133 B | A | view · diff |
| v1.1.0 | 2026-09-25 | 3fda96c | 20,763 B | A | view · diff |
| v1.1.0 | 2026-09-23 | efd148e | 20,596 B | A | view · diff |
| v1.1.0 | 2026-09-15 | 23c3d5d | 20,569 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (21278 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
rjmurillo/ai-agents · 48 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fgd5ajpvoarct24q GET https://markdownregistry.com/api/v1/resolve?ref=rjmurillo/ai-agents/agent-harness-reference GET https://markdownregistry.com/api/v1/blob/21df514f3709e7264814993199595bdf38e2b24e77f11abf21af00c03724c484
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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