feat: DGR-018 canonical Ralph metadata schema

.scratch/distributed-gguf-runtime/prd.json

@@ -2,7 +2,7 @@
   "name": "Distributed GGUF Runtime",
   "branchName": "ralph/distributed-gguf-runtime",
   "description": "Benchmark-gated distributed GGUF Shards using existing Meshnet control-plane routing and a standalone C++ gRPC worker around pinned upstream llama.cpp, targeting DeepSeek V4 Flash without hardcoded quantization or topology.",
-  "sourceOfTruth": "This prd.json is authoritative. Generated issue Markdown and planning summaries are projections and must not override it. All stories are unimplemented specifications with passes=false.",
+  "sourceOfTruth": "This prd.json is authoritative. Generated issue Markdown and planning summaries are projections and must not override it. DGR-017 and DGR-018 are complete; all later stories remain unimplemented specifications with passes=false.",
   "qualityGates": {
     "universal": [
       "Targeted deterministic tests pass; Python changes also pass `python -m compileall packages tests`.",
@@ -37,7 +37,12 @@
       "hardware",
       "model",
       "upstream",
-      "dependsOn"
+      "dependsOn",
+      "notes",
+      "blocks"
+    ],
+    "optionalStoryFields": [
+      "completionNotes"
     ],
     "idRange": "DGR-017..DGR-071 inclusive",
     "triageValues": [
@@ -55,8 +60,21 @@
       "real-hardware",
       "release"
     ],
+    "hardwareValues": [
+      "none",
+      "optional",
+      "required"
+    ],
+    "upstreamValues": [
+      "yes",
+      "no",
+      "conditional"
+    ],
+    "typeDerivation": "A story type is derived from its type:<value> label; gate:<value> stories derive release-gate.",
+    "labelConventions": "Reserved prefixes include type:, priority:, area:, gate:, and ready-for-agent/ready-for-human triage labels; at most one type: and one priority: label are allowed.",
+    "generatedArtifactDisclaimer": "<!-- GENERATED FROM prd.json — DO NOT EDIT AS AN INDEPENDENT SOURCE. prd.json IS AUTHORITATIVE. -->",
     "dependencyRules": "Dependencies reference existing numerically earlier IDs; graph is acyclic. blocks is mechanically derived from dependsOn.",
-    "authorityRule": "Generated issue files state that prd.json is authoritative and cannot independently claim completion."
+    "authorityRule": "Generated issue files state that prd.json is authoritative and cannot independently claim completion or override it."
   },
   "milestones": [
     {
@@ -311,7 +329,8 @@
         "Add deterministic model-free tests for parse, validation, and generation round trips.",
         "Applicable shared quality gates in `prd.json` pass, and the evidence handoff records exact commands/results, changed files, limitations, and dependency handoff."
       ],
-      "passes": false,
+      "passes": true,
+      "completionNotes": "Completed 2026-07-16. Added the canonical schema/validator/generator module and 108 deterministic tests; restored and extended prd.json metadata self-description; regenerated DGR-018. See evidence/DGR-018/README.md.",
       "notes": "Generated source issue: .scratch/distributed-gguf-runtime/issues/018-define-canonical-ralph-and-gitea-metadata-schema.md; prd.json is authoritative.",
       "blocks": [
         "DGR-021",