harness-league SKILL.md skillA
harness-league from ahmadhammoud56/moaa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ahmadhammoud56/moaa/harness-league@git:20261031.7519e8cPins git:20261031.7519e8c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ahmadhammoud56/moaa
- Path
plugins/agent-arena-mode/skills/harness-league/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261031.7519e8c, committed Oct 31, 2026
- Size
- 2,284 bytes
- Repository stars
- 5
- License
- MIT
Compare agent harnesses (Claude Code, Codex, Gemini CLI, OpenCode through allies) on the same frozen tasks, judged blind, with score, pass rate, cost and the tasks where they differ - real data for routing work to allies. Use when the user asks which agent or harness is best for a kind of task, or invokes /agent-arena-mode:harness-league.
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 Arena: harness league
Request: `$ARGUMENTS`. `T` means `python "${CLAUDE_PLUGIN_ROOT}/scripts/trial.py"` (`py` on Windows), one standalone
command. The same model can score very differently in two harnesses (tools, prompts, loop limits), so measure on the
user's tasks before routing work.
1. **Arms.** `claude` (this session's Agent tool) plus the allies members that `allies.py doctor` reports ready
(`/allies:allies`). Leave out members that are not ready, and say so.
2. **Tasks.** Up to 10 frozen, read-only tasks with a checkable pass condition, as `tasks.json`
`[{"id", "brief", "rubric", "pass"}]` in a fresh scratchpad folder. Read-only, because allies members answer
without writing to the user's tree; a task that needs edits runs in allies worktrees (`allies.py run --write`).
Keep secrets and private data out of the briefs: the briefs leave the machine for other providers.
3. **Plan and cost.** `T plan --arms <arms> --tasks <tasks.json> --out <dir> [--repeats K]`; show the run count and
token line and get the user's yes before running (more than 40 runs needs `--max-runs` and an explicit yes).
…Read the whole file at its exact version.
How to install
mdr add ahmadhammoud56/moaa/harness-league@sha256:9ca87c0d1f082c13The line at the top of this page pins the label git:20261031.7519e8c, 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_mzmlc2jxmfdcxuyi)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 31, 2026.
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 (2284 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
ahmadhammoud56/moaa · 5 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_mzmlc2jxmfdcxuyi GET https://markdownregistry.com/api/v1/resolve?ref=ahmadhammoud56/moaa/harness-league GET https://markdownregistry.com/api/v1/blob/9ca87c0d1f082c13a79a693a8a8c6007e4f9ef272a356e95f7cf74884947e5fa
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.