arena SKILL.md skillA
arena from cursor/plugins is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cursor/plugins/arena@git:20261027.ab1f702Pins git:20261027.ab1f702 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cursor/plugins
- Path
pstack/skills/arena/SKILL.md- Versions recorded
- 11
- Latest version
- git:20261027.ab1f702, committed Oct 27, 2026
- First version recorded
- Jul 26, 2026
- Size
- 5,598 bytes
- Repository stars
- 15,125
- License
- none declared
Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for /arena, 'arena this', 'throw it in the arena', or when one attempt at a non-trivial artifact would lock in the wrong shape.
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
# Arena Open a todolist with one entry per phase (Frame, Fan out, Cross-judge, Pick, Graft, Verify) before launching anything. ## Phase A: Frame Every candidate gets the same prompt, so the prompt is the contract. 1. State the artifact each candidate is producing. 2. Derive the rubric, 3-6 concrete gradeable criteria for what success looks like on *this* task. It is the picker's tool in Phase D. Candidates only see the task. 3. Pick the runners. Use the `arena runners` line in `~/.cursor/rules/pstack-models.mdc`. If the rule or that line is missing, default to one each on `claude-opus-5-5-xhigh` and `grok-4.7-xhigh-fast`. An `auto` or `inherit-parent` entry in this line means the parent model, so omit `model` for it. If the Task tool rejects a configured entry, run that seat on its family's default and say so. Families go by prefix: `claude-*`, and `grok-*` with `cursor-grok-*` and `composer-*`. A refused `composer-*` entry runs on `grok-4.7-xhigh-fast`. If the family has no default, or the Task tool rejects that default, use the closest valid slug of the same family from its error message, or drop the seat and say so when there is none. If dropped seats leave fewer than two… …
Read the whole file at its exact version.
How to install
mdr add cursor/plugins/arena@sha256:d0adeca6c9b19d43The line at the top of this page pins the label git:20261027.ab1f702, 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_danm2kaiapu27rjj)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 11 versions of this file, between Jul 26, 2026 and Oct 27, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261027.ab1f702 latest | 2026-10-27 | ab1f702 | 5,598 B | A | view · diff |
| git:20261014.ce649c0 | 2026-10-14 | ce649c0 | 4,511 B | A | view · diff |
| git:20261010.00b14f1 | 2026-10-10 | 00b14f1 | 4,279 B | A | view · diff |
| git:20261006.df58112 | 2026-10-06 | df58112 | 4,937 B | A | view · diff |
| git:20260923.12d587d | 2026-09-23 | 12d587d | 4,973 B | A | view · diff |
| git:20260923.70b2dc8 | 2026-09-23 | 70b2dc8 | 4,507 B | A | view · diff |
| git:20260908.d7cde2b | 2026-09-08 | d7cde2b | 4,591 B | A | view · diff |
| git:20260907.e8d856f | 2026-09-07 | e8d856f | 4,600 B | A | view · diff |
| git:20260901.23a56e2 | 2026-09-01 | 23a56e2 | 5,371 B | A | view · diff |
| git:20260813.63d938c | 2026-08-13 | 63d938c | 5,367 B | A | view · diff |
| git:20260726.d45ad02 | 2026-07-26 | d45ad02 | 5,367 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 (5598 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
cursor/plugins · 15,125 stars · license none declared · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_danm2kaiapu27rjj GET https://markdownregistry.com/api/v1/resolve?ref=cursor/plugins/arena GET https://markdownregistry.com/api/v1/blob/d0adeca6c9b19d43d90ed8f0484f0ddd362f05006d628b8f4cc6c9b55fa4d2b3
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.