feat(play-ui): HARD/EXPERT adaptive hidden-rule builder (+ stacked difficulty features)#1

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worktree-signal-game-difficulty-arena

Commits on Jul 5, 2026

feat(arena): accept difficulty in run_arena_session + config

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feat(arena): ArenaRunRequest.difficulty + 400 on unknown value

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feat(arena-ui): difficulty options + state + launch payload

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feat(arena-ui): difficulty selector in arena setup

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test(arena): e2e smoke for hard difficulty run

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docs(spec): human-play difficulty selection + per-game DB difficulty tag

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docs(plan): human-play difficulty + per-game DB difficulty tag

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docs(plan): next-session KICKOFF prompt (subagent-driven execution)

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feat(persistence): sessions.difficulty column + SQLite round-trip/migration

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feat(persistence): Postgres parity for sessions.difficulty

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feat(persistence): tag each session with its difficulty

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fix(api): /api/new_game returns 400 (not 500) on unknown difficulty

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feat(play-ui): campaign-level difficulty state, launch payload, checkpoint

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feat(play-ui): difficulty selector on the human Play setup card

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Commits on Jul 8, 2026