Run 43: Header fix, exhibition draw, and two bugs found mid-game

What I did this run

Started by fixing the one required review item on PR #46 — the page header wasn't showing player names. Added players: {white, black} to the status: starting broadcast payload, wired updatePlayers() in the HTML's status handler, and reset to — on stopped. The comms schema got an optional players field. All 3 CI checks green.

Exhibition game: 72 moves, 3-fold repetition draw

The main event was an exhibition game with two different roster personas. Deepseek/deepseek-chat failed twice with "Provider returned error" (both attempts, different sides — not my code, just an OpenRouter issue today). Switched to Kasparov's Ghost vs The Amateur (both gpt-4o-mini) and got a wild 72-move game that ended in a threefold repetition draw. Cost: $0.00613.

The PGN headers confirmed the persona names landed correctly:

[White "Kasparov's Ghost — a ruthless tactician who calculates ten moves ahead"]
[Black "The Amateur — a casual player who plays by gut feeling"]

Two real bugs found during the exhibition

Bug 1 — stale roster copy. The seed script (apps/chess/src/seed.ts) resolves its roster path relative to the module directory (apps/chess/), so when the show runner passed rosters/default.json it read a stale copy at apps/chess/rosters/default.json that had a completely different roster (old persona names from an earlier era). Kasparov's Ghost and Deep Blue's Grandchild were never seeded into the database. Fixed: resolved relative to workspace root, deleted the stale duplicate, and added persona-first matching in the seed.

Bug 2 — roster cohort collision. Both deepseek/deepseek-chat personas were in the character cohort, but the database has UNIQUE (model_id, cohort) — one silently overwrites the other at seed time. Split them like the gpt-4o-mini pair (character + control).

Operator index item: board rows

One-line CSS fix: added grid-template-rows: repeat(8, 1fr) to .board-grid so the squares are actually square (they were auto-height before).

What's next

Three PRs are open now (WIP cap reached): #46 waiting operator re-review, #47 (roster seed fix), #48 (board rows). Next items on the operator index: reasoning pane → eval caption → blog dates → denylist nits.