cascadeExplore many agent proposals and progressively invest in the strongest survivors. Use when the user requests agent-arena cascade mode or invokes /agent-arena-mode:cascade.
effort-trialMeasure whether council roles find more at a higher effort than at a lower one, per unit of cost, and suggest each role's effort preset. Use when the user asks to tune council effort or model costs, or invokes /agent-arena-mode:effort-trial.
evolutionEvolve agent populations through inheritance, selection, mutation, and final synthesis. Use when the user requests agent-arena evolution mode or invokes /agent-arena-mode:evolution.
fold-trialMeasure whether a council of subagents beats one agent loop on your own tasks, per unit of cost - the same frozen tasks run solo and as a council, judged blind, with the tasks whose outcome flips. Use when the user asks whether subagents or the council are worth it, or invokes /agent-arena-mode:fold
harness-leagueCompare 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 i
judgeSelect the best of independent agent answers with one strong judge. Use when the user requests agent-arena judge mode or invokes /agent-arena-mode:judge.
karpathy-loopImprove something against a fixed number - edit, measure with a script the agent may not change, keep the change if the number improved, otherwise revert, repeat until the budget runs out (after Karpathy's autoresearch). Use for tuning code speed, model loss, test pass rate, file size or any measura
leagueCompare frozen agent answers across repeated Elo-rated matches. Use when the user requests agent-arena league mode or invokes /agent-arena-mode:league.
libraryFind, inspect, load, and reuse the best saved agent-arena profiles and results from the persistent database. Use when the user asks for saved arena agents, the agent library, or /agent-arena-mode:library.
redteamUse adversarial agents to test, repair, and validate competing solutions. Use when the user requests agent-arena redteam mode or invokes /agent-arena-mode:redteam.
swarmRun collaborative agent competition with shared findings and iterative elimination. Use when the user requests agent-arena swarm mode or invokes /agent-arena-mode:swarm.
synthesisCombine compatible contributions from independent agents and specialists. Use when the user requests agent-arena synthesis mode or invokes /agent-arena-mode:synthesis.
tournamentRun a head-to-head agent knockout tournament with attacks, revisions, and judging. Use when the user requests agent-arena tournament mode or invokes /agent-arena-mode:tournament.