Spawn parallel candidate implementations for the same task, cross-judge, and graft the best parts into the winning base. Use when exploring competing designs or critical artifacts.
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
Fan out N parallel attempts at the same task, score them against concrete criteria, pick a base, and graft the best ideas from the others.
1. Frame: Define the artifact contract, 3-6 concrete rubric criteria, and isolated candidate output paths.
2. Fan out: Run parallel candidate attempts on isolated workers (via `delegate` when supported, or labeled sequential passes). Require a concrete artifact and short rationale from each.
3. Cross-judge: Score each candidate against the rubric criteria, compare trade-offs, and recommend the strongest base.
4. Pick a base: Select the implementation that is cleanest, easiest to maintain, and safest under domain invariants.
5. Graft: Port the best independent ideas or edge-case handling from losing candidates into the base by hand.
6. Verify: Validate the synthesized result against the full test and verification suite.
The line at the top of this page pins the label git:20260908.f096f61, 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.
GET https://markdownregistry.com/api/v1/artifacts/art_ujrlvntzcsdki6yh
GET https://markdownregistry.com/api/v1/resolve?ref=theonlyfusioncube/potetos-for-everyone/arena
GET https://markdownregistry.com/api/v1/blob/e11ba501369c54a1600ccc97e9e126423d06854fabdfacccb40e9fa295d0c9d6
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.
theonlyfusioncube/potetos-for-everyone · automations/benny/skills/reproduce-and-fix-issues/SKILL.md · Reproduce a confirmed issue on the closest real surface, find root cause, and optionally prepare a minimal draft fix…
theonlyfusioncube/potetos-for-everyone · automations/benny/skills/triage-issue-reports/SKILL.md · Triage incoming software issue reports using available repository and runtime evidence, without editing code. Use for…
theonlyfusioncube/potetos-for-everyone · skills/architect/SKILL.md · Settle data shapes, ownership, boundaries, and interfaces before code crosses a function/module boundary. Use for…
theonlyfusioncube/potetos-for-everyone · skills/automate-me/SKILL.md · Create a personal mode skill from recurring workflow patterns in available history. Use when the user wants their own…
theonlyfusioncube/potetos-for-everyone · skills/benchmark-checklist/SKILL.md · Vet a perf measurement (limiter, tuning, limits, errors, repeatability, relevance, and whether the work happened)…
theonlyfusioncube/potetos-for-everyone · skills/blast-radius/SKILL.md · Prove what a small-looking change can affect before or after editing. Use for compatibility, caller, state, schema, or…
theonlyfusioncube/potetos-for-everyone · skills/bro/SKILL.md · Restate the last technical explanation in plain human language with minimal jargon. Use when the user asks for a…
theonlyfusioncube/potetos-for-everyone · skills/correct/SKILL.md · Find the mistakes agents keep repeating in this repo and make each one impossible. Try architecture first, then types…
theonlyfusioncube/potetos-for-everyone · skills/create-formal-verification-skill/SKILL.md · Generate a project-local skill that formally verifies the code where a bug costs the most and tests reach the least, in…
theonlyfusioncube/potetos-for-everyone · skills/create-verification-skill/SKILL.md · Generate a project-local verification skill that drives the real app and captures evidence. Use when setting up…
theonlyfusioncube/potetos-for-everyone · skills/figure-it-out/SKILL.md · Design a rigorous custom playbook when no bundled playbook safely fits a large or unusual task. Use for cross-cutting…
cursor/plugins · harness/pstack/claude-code/skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
cursor/plugins · pstack/skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
michael-denyer/pstack-claude · plugins/pstack/skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
backnotprop/pstack · skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
j-star-films-studios/vibecode-protocol-suite · assets/.agent/skills/agent-engineering/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
creedants/pstack-t3 · t3/overrides/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
creedants/pstack-t3 · skills/arena/SKILL.md · Spawn N parallel candidates at the same task, pick a base, graft the strongest parts of the losers into it. Use for…
