# AI Collaboration Statement

hexgrid is developed for the 2026 MoonBit Hackathon (November season)
with AI assistance, under the season rule that AI may help write code
while the participant owns the project's goals, technical path and
quality. The division of work:

## Participant-owned decisions

- **Topic selection and duplication check.** The participant chose the
  hexagonal-grid domain after a full mooncakes duplication sweep
  (11 batches, 100+ keywords across all of categories from regex to
  YAML to game engines) established that flat 2D hexagonal grid
  geometry is a genuine gap, and that Uber H3 (geodesic indexing) is a
  different problem domain.
- **Scope and architecture.** Three single-responsibility packages
  (hex / path / fov), pure deterministic APIs, caller-injected game
  semantics (passability, terrain cost, transparency), zero third-party
  dependencies.
- **Reference policy.** Red Blob Games and the classical Dijkstra/A*
  literature are the sole mathematical references; their sources,
  referenced scope and licence terms are recorded in
  [RULES_REFERENCES.md](RULES_REFERENCES.md), and no third-party code
  or text is copied.
- **Quality gates.** `moon check --deny-warn`, `moon test --deny-warn`
  on three backends, `moon fmt --check`, a hard `moonc >= 0.10.16`
  assertion, and an independent consumer module (examples/consumer)
  that CI runs on every push.
- **Acceptance of every change.** All tests, docs and commits are
  reviewed by the participant before pushing; the commit history is
  split by feature.

## AI-assisted work

- Drafting MoonBit implementations of the referenced algorithms.
- Drafting tests (including property-style roundtrip tests) and
  documentation.
- Fixing toolchain-level build issues.

## Evidence

- Commit history: <https://github.com/wbgxiaosu/hexgrid/commits>
- CI runs: <https://github.com/wbgxiaosu/hexgrid/actions>
- Duplication-check and reference provenance:
  [RULES_REFERENCES.md](RULES_REFERENCES.md)