arena SKILL.md skillA
arena from creedants/pstack-t3 is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add creedants/pstack-t3/arena@git:20261011.042ae70Pins git:20261011.042ae70 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- creedants/pstack-t3
- Path
skills/arena/SKILL.md- Versions recorded
- 7
- Latest version
- git:20261011.042ae70, committed Oct 11, 2026
- First version recorded
- Oct 3, 2026
- Size
- 6,122 bytes
- Repository stars
- 15
- License
- MIT
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 Read [the pstack-t3 runtime](../pstack-runtime/SKILL.md) before spawning workers, choosing models, scheduling, or isolating work. It maps those steps onto T3's orchestrator tools. Open a todolist with one entry per phase (Frame, Fan out, Cross-judge, Pick, Graft, Verify) before launching anything. [The runtime's Modes section](../pstack-runtime/SKILL.md#modes) sets the mode lines of every brief this skill writes and how its spawns run in light mode. ## 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. Call `orchestrator_capabilities`. Paste that tool result into this quoted heredoc. If the catalog result is large, save it to a temporary file with the host's file tool and pass that path to `--catalog`. ```bash python3 <pstack-runtime>/scripts/roles.py show --cwd "$PWD" --catalog - --parent "<inheritedProviderInstanceId>/<inheritedModel>" --role "arena runners" <<'JSON' …
Read the whole file at its exact version.
How to install
mdr add creedants/pstack-t3/arena@sha256:2d800a8660e2d7b1The line at the top of this page pins the label git:20261011.042ae70, 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_umsex2ebi275jcjc)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Oct 3, 2026 and Oct 11, 2026, about one every day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261011.042ae70 latest | 2026-10-11 | 042ae70 | 6,122 B | A | view · diff |
| git:20261008.31a131d | 2026-10-08 | 31a131d | 6,780 B | A | view · diff |
| git:20261007.a59be7f | 2026-10-07 | a59be7f | 6,531 B | A | view · diff |
| git:20261007.0218a9a | 2026-10-07 | 0218a9a | 6,524 B | A | view · diff |
| git:20261006.c768f78 | 2026-10-06 | c768f78 | 6,234 B | A | view · diff |
| git:20261003.ad880e0 | 2026-10-03 | ad880e0 | 5,790 B | A | view · diff |
| git:20261003.a632f62 | 2026-10-03 | a632f62 | 5,684 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 (6122 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
creedants/pstack-t3 · 15 stars · license MIT · pushed 2026-10-19 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_umsex2ebi275jcjc GET https://markdownregistry.com/api/v1/resolve?ref=creedants/pstack-t3/arena GET https://markdownregistry.com/api/v1/blob/2d800a8660e2d7b168ab41ad0b93b668871089d976b4b377709872d38d456e1d
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.
More from creedants/pstack-t3
Every file in creedants/pstack-t3