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kamilkrzywda 5abbebc58f LLM getNeighbours tool + contiguous region transfers (Stage 2 of #16 P2)
- llm.ts: LlmClient.chatWithTools — bounded OpenAI function-calling loop
  (default 6 tool rounds, then one forced no-tools request); shares the
  retry/backoff/reasoning-effort machinery with chat(); tools are only
  added to the request body when non-empty, so plain chat() bodies and
  their tests are unchanged; a tool-call response is a success (never a
  truncation); malformed tool arguments become an error tool-message.
- engine.ts: GET_NEIGHBOURS_TOOL + makeNeighboursExecutor (degrades
  unknown tools/args/keys without throwing); playerFrontier (sorted,
  deduped, other-nation-owned only); buildSystemPrompt gains a tool
  variant (contiguity rules, frontier hint) used only when the tool is
  actually sent; buildUserPrompt emits a frontier field whenever a
  resolver is given; runTurn takes getNeighbours and uses
  chatWithTools when both the resolver and the client's capability are
  present, falling back to plain chat() otherwise.
- applyTurnResult: snapshot-first sole-ownership algorithm — a region
  key transfers only with exactly one claimant and exactly one previous
  owner (different from the gainer); double claims and pre-existing
  double ownership are left untouched; lone losses are no-ops; every
  key has 0 or 2+ -> 1 owner post-turn, never orphaned or duplicated.
- stub.ts: deterministic one-region contiguous conquest per turn from
  the prompt's frontier field (bypasses the tool loop; empty frontier
  -> no transfer, all existing assertions stay stable).
- regions.ts: optional region-adjacency.json load; hasAdjacency() and
  neighboursOf(keys) (union, deduped, queried excluded, sorted).
- index.ts: jump route passes the adjacency resolver when loaded.
- tests: chatWithTools protocol (echo, executor args, bounded rounds,
  malformed args, retry), tool-path runTurn wiring + fallback,
  playerFrontier, executor, applyTurnResult invariants, neighboursOf/
  hasAdjacency (105 unit tests, 14 e2e — all green).
2026-10-14 10:37:25 +00:00
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