Sprint 1: project skeleton, type system, and all architecture specs

- src/types.hpp: complete UCWM type system in C++20 — 19 enums, 11 facet
  data types, all core structs (CanonicalObject, Constraint, Facet,
  GateSignal, WorldState, etc.) with full JSON round-trip serialization
- src/main.cpp: smoke test — constructs apple-problem WorldState by hand,
  serializes to JSON
- tests/test_types.cpp: 19 tests, 123 assertions, all passing
- CMakeLists.txt: CMake + CPM build with nlohmann/json, spdlog, Catch2
- schemas/: JSON Schema contracts for all UCWM data types
- gates/, specialists/, resolver/, synthesis/: language-agnostic interface
  contracts and domain specs for all pipeline layers
- docs/: architecture, vocabulary, decision matrices, roadmap (6 phases,
  28 sprints), sprint_001, implementation_constraints

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

schemas/objects.json

@@ -0,0 +1,128 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "ucwm/schemas/objects.json",
+  "title": "CanonicalObject",
+  "description": "The primary reusable referent inside UCWM. A stable anchor that facets and constraints attach to.",
+  "type": "object",
+  "required": ["object_id", "object_kind", "status", "confidence"],
+  "additionalProperties": false,
+  "properties": {
+    "object_id": {
+      "type": "string",
+      "description": "Unique identifier. Format: {kind_prefix}_{sequence} e.g. E1, O4, Q7",
+      "pattern": "^[A-Z][A-Z0-9]*_[0-9]+$|^[A-Z][0-9]+$"
+    },
+    "object_kind": {
+      "type": "string",
+      "enum": [
+        "entity",
+        "event",
+        "concept",
+        "proposition",
+        "relation_instance",
+        "procedure_step",
+        "code_object",
+        "quantity",
+        "claim",
+        "state"
+      ],
+      "description": "The ontological kind of this object."
+    },
+    "status": {
+      "type": "string",
+      "enum": ["proposed", "active", "merged", "split", "invalidated"],
+      "description": "Lifecycle status. Proposed objects are unconfirmed. Merged objects were unified with another. Split objects produced multiple descendants.",
+      "default": "proposed"
+    },
+    "confidence": {
+      "type": "number",
+      "minimum": 0.0,
+      "maximum": 1.0,
+      "description": "Aggregate confidence that this object is correctly proposed."
+    },
+    "surface_span": {
+      "type": "object",
+      "description": "The text span(s) that evidence this object.",
+      "properties": {
+        "text": { "type": "string" },
+        "start": { "type": "integer" },
+        "end": { "type": "integer" }
+      },
+      "additionalProperties": false
+    },
+    "canonical_label": {
+      "type": "string",
+      "description": "Human-readable canonical name for this object."
+    },
+    "aliases": {
+      "type": "array",
+      "items": { "type": "string" },
+      "description": "Alternative names, pronouns, or references that may corefer to this object."
+    },
+    "merged_into": {
+      "type": "string",
+      "description": "object_id of the object this was merged into. Populated only when status=merged."
+    },
+    "split_from": {
+      "type": "string",
+      "description": "object_id of the object this was split from. Populated only when status=split."
+    },
+    "facet_refs": {
+      "type": "array",
+      "items": { "type": "string" },
+      "description": "IDs of Facet objects attached to this canonical object.",
+      "default": []
+    },
+    "constraint_refs": {
+      "type": "array",
+      "items": { "type": "string" },
+      "description": "IDs of Constraints that reference this object.",
+      "default": []
+    },
+    "evidence_refs": {
+      "type": "array",
+      "items": { "type": "string" },
+      "description": "IDs of evidence or provenance records supporting this object.",
+      "default": []
+    },
+    "provenance_refs": {
+      "type": "array",
+      "items": { "type": "string" },
+      "description": "IDs of Provenance records tracking how this object was created.",
+      "default": []
+    },
+    "source_module": {
+      "type": "string",
+      "description": "Module ID that proposed this object."
+    }
+  },
+  "examples": [
+    {
+      "object_id": "E1",
+      "object_kind": "entity",
+      "status": "active",
+      "confidence": 0.97,
+      "surface_span": { "text": "Alice", "start": 0, "end": 5 },
+      "canonical_label": "Alice",
+      "aliases": ["she", "her"],
+      "facet_refs": ["F_E1_ownership", "F_E1_temporal"],
+      "constraint_refs": ["C1", "C3"],
+      "evidence_refs": [],
+      "provenance_refs": ["P1"],
+      "source_module": "entity_specialist"
+    },
+    {
+      "object_id": "Q1",
+      "object_kind": "quantity",
+      "status": "active",
+      "confidence": 0.99,
+      "surface_span": { "text": "5 apples", "start": 10, "end": 17 },
+      "canonical_label": "5",
+      "facet_refs": ["F_Q1_quantity"],
+      "constraint_refs": ["C1"],
+      "evidence_refs": [],
+      "provenance_refs": ["P2"],
+      "source_module": "quantity_specialist"
+    }
+  ]
+}