- CLAUDE.md: phase line moved to "Phase 1 deployed"; key files lists
the new bot module, game-end extraction, and selfplay harness.
- DECISIONS.md: new "Phase 1 implementation outcomes" subsection records
the CasualBrain-engine reversal, the FEN-vanilla-only invariant, why
blind keeps heuristic, and the bot-slot token randomization. The
earlier "Stockfish deferred" entry is partially superseded.
- .claude/handoffs/: handoff document for the next session.
Updates CLAUDE.md "Current State" + "Key files" to point at the new spec.
Adds DECISIONS.md "AI / computer player" section (11 settled decisions).
Strikes through the prior "Client-side AI / hint generation — out of scope"
row with a "partially superseded" note: the reversal applies only to the
human-vs-AI path. Adds 7 new Deferred/Rejected rows for AI-feature scope.
Handoff at .claude/handoffs/2026-04-28-170713-ai-player-spec.md captures
session state for the next pickup (writing-plans → Phase 1 implementation).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>