arena SKILL.md skillA
arena from lucasheriques/pstack is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add lucasheriques/pstack/arena@git:20261014.8882c71Pins git:20261014.8882c71 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- lucasheriques/pstack
- Path
skills/arena/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261014.8882c71, committed Oct 14, 2026
- First version recorded
- Sep 23, 2026
- Size
- 3,903 bytes
- Repository stars
- 3
- 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
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 from the `arena runners` role in `${CLAUDE_SKILL_DIR}/../poteto-mode/references/models.md`, one per entry. Spawn more runners when the arena covers multiple design directions. Use the same model N times when the work is generation-bound rather than judgment-sensitive.
4. Give each candidate its own output location (`isolation: "worktree"` where possible, otherwise `/tmp/arena-<slug>/candidate-<n>/`), per **principle-separate-before-serializing-shared-state**. Principles live at `${CLAUDE_SKILL_DIR}/../poteto-mode/principles/<name>.md`.
## Phase B: Fan out
…Read the whole file at its exact version.
How to install
mdr add lucasheriques/pstack/arena@sha256:d5575824363db01bThe line at the top of this page pins the label git:20261014.8882c71, 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_vvtbmm7rxtv4pqj3)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Sep 23, 2026 and Oct 14, 2026, about one every 11 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261014.8882c71 latest | 2026-10-14 | 8882c71 | 3,903 B | A | view · diff |
| git:20260923.11fd787 | 2026-09-23 | 11fd787 | 4,561 B | A | view · diff |
| git:20260923.8a26243 | 2026-09-23 | 8a26243 | 4,507 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 (3903 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
lucasheriques/pstack · 3 stars · license MIT · pushed 2026-10-16 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_vvtbmm7rxtv4pqj3 GET https://markdownregistry.com/api/v1/resolve?ref=lucasheriques/pstack/arena GET https://markdownregistry.com/api/v1/blob/d5575824363db01b97e339c27b1f8e632e029e1c20cd193187ab15f187fd7138
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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