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open-wc/coordination/claims/M01-FND-COORD-TILE-AXIS-002.md
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sindoring f9c467b71f docs(M01): claim ADT tile axis correction 
Work-Package: M01-FND-COORD-TILE-AXIS-002
Agent: sindo-main-codex
Tests: not applicable (claim only)
Fidelity: raw Azeroth_31_49 ADT and OpenRealm independently expose swapped filename axes
2026-07-13 14:09:20 +04:00

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M01-FND-COORD-TILE-AXIS-002 — ADT filename axis correction

Ownership

  • Target: M01
  • Program: FND
  • Owner/Agent ID: sindo-main-codex
  • Branch: work/sindo-main-codex/m01-coordinate-tile-axis-fix
  • Lease expires UTC: 2026-07-15
  • Integrator: M01 milestone integrator

Outcome

Correct the additive coordinate contract so AdtTileCoordinate(tile_x, tile_y) matches actual Map_tileX_tileY.adt filenames and MCNK indexX/indexY axes.

Non-goals

  • Migrating renderer/native consumers.
  • Changing canonical, server, Godot or ADT placement position arithmetic.
  • Adding server-spawn fixtures or StreamingFocus.
  • Committing proprietary ADT bytes.

Paths

  • Exclusive: src/domain/coordinates/coordinate_mapper.gd, src/domain/coordinates/adt_chunk_coordinate.gd, src/tools/verify_coordinate_mapper.gd
  • Shared/hotspots: docs/adr/0001-canonical-world-coordinates.md, docs/modules/coordinate-mapping.md, this claim
  • Generated/ignored: local extracted ADT and Godot import metadata

Contracts and data

  • Public API/events: method names unchanged; corrected tile/chunk axis semantics
  • Schema/format version: coordinate contract version increments from 1 to 2
  • Migration/compatibility: no released consumer exists; contract was merged but not yet consumed, so correction precedes consumer rollout
  • Consumers: future renderer, network, gameplay and server-data adapters

Dependencies

  • Requires: merged M01-FND-COORDS-001 at 1c0dfc7
  • Blocks: coordinate golden fixtures and all coordinate consumers
  • External state: private Azeroth_31_49.adt used read-only for evidence

Verification

  • Commands: coordinate mapper probe, M00 calibration, manifest, documentation and coordination gates
  • Fixtures: build 12340 Elwynn point must resolve to Azeroth_31_49.adt; MCNK (0,0) and (15,15) establish chunk-axis direction
  • Fidelity evidence: local ADT SHA-256 18185B5FAC9566D9C57A9C19ABD75F108370D1795639B6077167C0EFD3672FAE; OpenRealm independently indexes filename X from world Y and filename Y from world X
  • Performance budget: unchanged constant-time scalar arithmetic

Documentation deliverables

  • Inline public API docs: corrected tile/chunk direction comments
  • Module specification: contract version, formulas, capability evidence and risk
  • Data-flow diagram: corrected filename/chunk axes
  • ADR: corrected decision and evidence
  • Sequence/state diagrams: not applicable; pure synchronous mapper

Simplicity and naming

  • Important names introduced: none
  • Simplest considered solution: swap the two filename formulas and corresponding local/chunk ownership calculations
  • Rejected complexity/abstractions: compatibility flag for a contract with no consumers
  • Unavoidable complexity and justification: ADT filename axes differ from client X/Y order
  • Measured optimization evidence: not applicable

Status

  • State: active
  • Done: raw-corpus and independent-reference diagnosis
  • Next: regression test, mapper correction and documentation update
  • Blocked by:
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