feat(#1430): versioned capability manifest + native stamping (ADR-1244 Phase 1) (#1436)

* feat(#1430): versioned capability manifest + native stamping (ADR-1244 Phase 1)

Make the capability manifest versioned — the data substrate the Capability
Ecosystem (ADR-1244) keys off:

- capability.json gains a REQUIRED semver `version` plus the optional
  ecosystem envelope (`engines.gsd`, `compatVersions`, `integrity`,
  `provenance`); the build-time conformance validator enforces them via a new
  `validateVersionEnvelope()` (exported for the Phase 2 runtime overlay).
- All 32 native capabilities stamped with `version` (= package version,
  lockstep) + `engines.gsd`; `sync-manifest-versions.cjs` gains a glob sweep
  that keeps them in sync, and the issue-844 regression guard is extended.
- Strict SemVer 2.0.0 grammar blocks metacharacter/space/unicode smuggling in
  version strings; range/integrity fields are shape-validated (satisfaction
  and the load-time gate are deferred to Phase 2/4).
- Capability rel-paths emitted forward-slash for cross-platform git correctness.

Closes #1430

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* docs(#1430): add changeset for versioned capability manifest

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

capabilities/mempalace/capability.json

@@ -1,13 +1,27 @@
 {
   "id": "mempalace",
   "role": "feature",
+  "version": "1.5.1-dev.0",
   "title": "MemPalace memory",
   "description": "Cross-session, cross-project memory: deliberate recall before discuss/plan and verbatim capture + temporal-KG sync at phase boundaries, via the MemPalace MCP server and CLI.",
   "tier": "full",
   "requires": [],
-  "runtimeCompat": { "supported": ["*"], "unsupported": [] },
-  "skills": ["mempalace-recall", "mempalace-capture"],
-  "agents": ["gsd-mempalace-curator"],
+  "engines": {
+    "gsd": ">=1.6.0"
+  },
+  "runtimeCompat": {
+    "supported": [
+      "*"
+    ],
+    "unsupported": []
+  },
+  "skills": [
+    "mempalace-recall",
+    "mempalace-capture"
+  ],
+  "agents": [
+    "gsd-mempalace-curator"
+  ],
   "hooks": [],
   "config": {
     "mempalace.enabled": {
@@ -17,7 +31,11 @@
     },
     "mempalace.memory_mode": {
       "type": "enum",
-      "values": ["augment", "kg_backend", "replace"],
+      "values": [
+        "augment",
+        "kg_backend",
+        "replace"
+      ],
       "default": "augment",
       "description": "How MemPalace relates to GSD native memory. Only 'augment' (additive) is implemented today; 'kg_backend' and 'replace' are forward-declared (routing seam not yet built) and currently behave as 'augment'."
     },
@@ -65,41 +83,63 @@
   "steps": [
     {
       "point": "discuss:post",
-      "ref": { "skill": "mempalace-capture" },
+      "ref": {
+        "skill": "mempalace-capture"
+      },
       "produces": [],
-      "consumes": ["CONTEXT.md"],
+      "consumes": [
+        "CONTEXT.md"
+      ],
       "when": "mempalace.enabled",
       "onError": "skip"
     },
     {
       "point": "plan:pre",
-      "ref": { "skill": "mempalace-recall" },
-      "produces": ["MEMORY-RECALL.md"],
-      "consumes": ["CONTEXT.md"],
+      "ref": {
+        "skill": "mempalace-recall"
+      },
+      "produces": [
+        "MEMORY-RECALL.md"
+      ],
+      "consumes": [
+        "CONTEXT.md"
+      ],
       "when": "mempalace.enabled",
       "onError": "skip"
     },
     {
       "point": "plan:post",
-      "ref": { "skill": "mempalace-capture" },
+      "ref": {
+        "skill": "mempalace-capture"
+      },
       "produces": [],
-      "consumes": ["PLAN.md"],
+      "consumes": [
+        "PLAN.md"
+      ],
       "when": "mempalace.enabled",
       "onError": "skip"
     },
     {
       "point": "verify:post",
-      "ref": { "skill": "mempalace-capture" },
+      "ref": {
+        "skill": "mempalace-capture"
+      },
       "produces": [],
-      "consumes": ["SUMMARY.md"],
+      "consumes": [
+        "SUMMARY.md"
+      ],
       "when": "mempalace.enabled",
       "onError": "skip"
     },
     {
       "point": "ship:post",
-      "ref": { "agent": "gsd-mempalace-curator" },
+      "ref": {
+        "agent": "gsd-mempalace-curator"
+      },
       "produces": [],
-      "consumes": ["UAT.md"],
+      "consumes": [
+        "UAT.md"
+      ],
       "when": "mempalace.enabled",
       "onError": "skip"
     }
@@ -108,7 +148,9 @@
     {
       "point": "discuss:pre",
       "into": "orchestrator",
-      "fragment": { "path": "fragments/recall-discuss.md" },
+      "fragment": {
+        "path": "fragments/recall-discuss.md"
+      },
       "produces": [],
       "consumes": [],
       "when": "mempalace.enabled",
@@ -117,7 +159,9 @@
     {
       "point": "execute:wave:post",
       "into": "verifier",
-      "fragment": { "path": "fragments/capture-problems.md" },
+      "fragment": {
+        "path": "fragments/capture-problems.md"
+      },
       "produces": [],
       "consumes": [],
       "when": "mempalace.enabled",