feat: WOB material serialization, FORMAT_SPEC v1.1, material tests

- WOB save/load now serializes Material struct fields (flags, shader,
  blendMode, texturePath) per group — was saving only texture paths
- FORMAT_SPEC.md v1.1: documents WOT doodad/WMO placements, WOB
  material fields, doodad rotation, terrain stamps, WCP file list
- Test coverage: 5 new assertions verify material round-trip (flags,
  shader, blendMode all preserved through save→load cycle)
- 260 total assertions across 75 test cases, all passing

src/pipeline/wowee_building.cpp

@@ -64,6 +64,23 @@ WoweeBuilding WoweeBuildingLoader::load(const std::string& basePath) {
             f.read(tp.data(), tl);
             grp.texturePaths.push_back(tp);
         }
+
+        // Read material data (v1.1+)
+        uint32_t mc = 0;
+        if (f.read(reinterpret_cast<char*>(&mc), 4) && mc > 0 && mc <= 256) {
+            for (uint32_t mi = 0; mi < mc; mi++) {
+                WoweeBuilding::Material mat;
+                uint16_t pl;
+                f.read(reinterpret_cast<char*>(&pl), 2);
+                mat.texturePath.resize(pl);
+                f.read(mat.texturePath.data(), pl);
+                f.read(reinterpret_cast<char*>(&mat.flags), 4);
+                f.read(reinterpret_cast<char*>(&mat.shader), 4);
+                f.read(reinterpret_cast<char*>(&mat.blendMode), 4);
+                grp.materials.push_back(mat);
+            }
+        }
+
         bld.groups.push_back(std::move(grp));
     }
 
@@ -140,6 +157,18 @@ bool WoweeBuildingLoader::save(const WoweeBuilding& bld, const std::string& base
             f.write(reinterpret_cast<const char*>(&tl), 2);
             f.write(tp.data(), tl);
         }
+
+        // Write material data
+        uint32_t mc = static_cast<uint32_t>(grp.materials.size());
+        f.write(reinterpret_cast<const char*>(&mc), 4);
+        for (const auto& mat : grp.materials) {
+            uint16_t pl = static_cast<uint16_t>(mat.texturePath.size());
+            f.write(reinterpret_cast<const char*>(&pl), 2);
+            f.write(mat.texturePath.data(), pl);
+            f.write(reinterpret_cast<const char*>(&mat.flags), 4);
+            f.write(reinterpret_cast<const char*>(&mat.shader), 4);
+            f.write(reinterpret_cast<const char*>(&mat.blendMode), 4);
+        }
     }
 
     for (const auto& portal : bld.portals) {

tests/test_open_formats.cpp

@@ -34,6 +34,12 @@ TEST_CASE("WOB save and load round-trip", "[wob]") {
     grp.vertices.push_back({{0,1,0}, {0,0,1}, {0,1}, {1,1,1,1}});
     grp.indices = {0, 1, 2};
     grp.texturePaths.push_back("textures/wall.png");
+    WoweeBuilding::Material mat;
+    mat.texturePath = "textures/wall.png";
+    mat.flags = 0x10;
+    mat.shader = 3;
+    mat.blendMode = 1;
+    grp.materials.push_back(mat);
     bld.groups.push_back(grp);
 
     WoweeBuilding::Portal portal;
@@ -63,6 +69,11 @@ TEST_CASE("WOB save and load round-trip", "[wob]") {
     REQUIRE(loaded.groups[0].vertices.size() == 3);
     REQUIRE(loaded.groups[0].indices.size() == 3);
     REQUIRE(loaded.groups[0].isOutdoor == false);
+    REQUIRE(loaded.groups[0].materials.size() == 1);
+    REQUIRE(loaded.groups[0].materials[0].texturePath == "textures/wall.png");
+    REQUIRE(loaded.groups[0].materials[0].flags == 0x10);
+    REQUIRE(loaded.groups[0].materials[0].shader == 3);
+    REQUIRE(loaded.groups[0].materials[0].blendMode == 1);
     REQUIRE(loaded.portals.size() == 1);
     REQUIRE(loaded.portals[0].groupA == 0);
     REQUIRE(loaded.portals[0].vertices.size() == 4);

tools/editor/FORMAT_SPEC.md

@@ -1,16 +1,18 @@
-# Wowee Open Format Specification v1.0
+# Wowee Open Format Specification v1.1
 
 Novel file formats for custom WoW zone content. No Blizzard IP.
 
 ## WOT — Wowee Open Terrain (JSON metadata)
 - Extension: `.wot`
-- Contains: tile coords, texture list, per-chunk layers/holes, water data
+- Contains: tile coords, texture list, per-chunk layers/holes, water data,
+  doodad placements (M2 objects), WMO placements (buildings)
 - Key: `"format": "wot-1.0"`
+- Placement fields: `doodadNames[]`, `doodads[]` (nameId, uniqueId, pos, rot, scale, flags)
+- WMO fields: `wmoNames[]`, `wmos[]` (nameId, uniqueId, pos, rot, flags, doodadSet)
 
 ## WHM — Wowee HeightMap (binary)
 - Extension: `.whm`
 - Magic: `WHM1` (0x314D4857)
-- Version: 1 (embedded in magic — WHM2 for future revisions)
 - Layout: magic(4) + chunks(4) + vertsPerChunk(4) + per-chunk data × 256
 - Per-chunk: baseHeight(4) + heights[145](580) + alphaSize(4) + alphaData(alphaSize)
 - Alpha data: raw alpha blend maps for texture layers (same format as ADT MCAL)
@@ -18,29 +20,32 @@ Novel file formats for custom WoW zone content. No Blizzard IP.
 
 ## WOM — Wowee Open Model (binary)
 - Extension: `.wom`
-- Magic: `WOM1` (0x314D4F57) — version 1
+- Magic: `WOM1` (0x314D4F57)
-- Version: embedded in magic (WOM2 for future revisions with animation support)
 - Layout: magic(4) + vertCount(4) + indexCount(4) + texCount(4) + bounds(28) + name + vertices + indices + texPaths
 - Vertex: position(vec3) + normal(vec3) + texCoord(vec2) = 32 bytes
+- Note: geometry-only (no skeletal animation — WOM2 planned for bone data)
 
 ## WOB — Wowee Open Building (binary)
 - Extension: `.wob`
 - Magic: `WOB1` (0x31424F57)
 - Layout: magic(4) + groupCount(4) + portalCount(4) + doodadCount(4) + bounds(4) + name + groups + portals + doodads
-- Group: name + vertices(pos+normal+uv+color) + indices + texPaths + bounds + outdoor flag
+- Group: name + vertexCount(4) + indexCount(4) + texCount(4) + outdoor(1) + bounds(24)
+  + vertices(pos+normal+uv+color) + indices + texPaths + materialCount(4) + materials
+- Material: texturePath + flags(4) + shader(4) + blendMode(4)
+- Doodad: modelPath + position(12) + rotation(12) + scale(4)
+- Portal: groupA(4) + groupB(4) + vertexCount(4) + vertices
 
 ## WCP — Wowee Content Pack (archive)
 - Extension: `.wcp`
 - Magic: `WCP1` (0x31504357)
 - Layout: magic(4) + fileCount(4) + infoJsonSize(4) + infoJSON + [pathLen(2) + path + dataSize(4) + data] × N
+- Info JSON includes categorized file list (terrain/model/building/texture/data)
 
 ## zone.json — Map Definition
 - Replaces WDT
-- Contains: mapName, mapId, tiles, biome, file references
+- Fields: `mapName`, `displayName`, `mapId`, `biome`, `baseHeight`
-
-## zone.json Fields
-- `mapName`, `displayName`, `mapId`, `biome`, `baseHeight`
 - `hasCreatures`, `description`, `tiles` array, `files` map
+- `doodadNames[]`, `doodads[]`, `wmoNames[]`, `wmos[]` for placed objects
 - `editorVersion` for compatibility tracking
 
 ## JSON DBC — Data Table Replacement
@@ -54,6 +59,11 @@ Novel file formats for custom WoW zone content. No Blizzard IP.
 - Standard PNG format, loaded by client's texture override system
 - Editor auto-converts BLP→PNG on export via stb_image_write
 
+## Terrain Stamps (.json)
+- Portable terrain feature snapshots (mountains, craters, etc.)
+- Format: `{"format": "wowee-stamp-1.0", "vertices": [[dx, dy, height], ...]}`
+- Can be saved/loaded across zones and sessions
+
 ## Open Format Scoring (0-6)
 1. WOT terrain metadata present
 2. WHM heightmap with valid magic