refactor: hard-fork GSD -> MSD (Make Software Done)

Mechanical rename produced by scripts/msd-rename.cjs: gsd/Gsd/GSD -> msd/Msd/MSD
across contents and paths, upstream package/repo coordinates -> @golem15/msd-core
and golem15com/msd-core. Deep links into upstream history, sibling upstream
packages, the GSD-2 import feature, CHANGELOG.md and .changeset/ are kept as-is.

Hand edits on top: MSD block-letter banner and logos, LICENSE copyright line,
package/plugin identity, regenerated lockfile, install-tree fixtures, derived
registries and benchmark baseline; migration checksum baseline re-locked
(MSD keeps its own install state, so no install had applied the old sums);
sort-order and regex-escaped expectations in tests adjusted.

package.json

@@ -1,19 +1,19 @@
 {
-  "name": "@opengsd/gsd-core",
+  "name": "@golem15/msd-core",
   "version": "1.14.0",
-  "description": "GSD Core is a meta-prompting, context engineering, and spec-driven development system for AI coding agents.",
-  "main": ".opencode/plugins/gsd-core.js",
+  "description": "MSD Core is a meta-prompting, context engineering, and spec-driven development system for AI coding agents.",
+  "main": ".opencode/plugins/msd-core.js",
   "bin": {
-    "gsd-core": "bin/install.js",
-    "gsd-tools": "gsd-core/bin/gsd-tools.cjs",
-    "gsd_run": "gsd-core/bin/gsd_run",
-    "gsd-mcp-server": "bin/gsd-mcp-server.js"
+    "msd-core": "bin/install.js",
+    "msd-tools": "msd-core/bin/msd-tools.cjs",
+    "msd_run": "msd-core/bin/msd_run",
+    "msd-mcp-server": "bin/msd-mcp-server.js"
   },
   "files": [
     "bin",
     "commands",
     "skills",
-    "gsd-core",
+    "msd-core",
     "assets",
     "agents",
     ".claude-plugin",
@@ -43,15 +43,15 @@
     "codex",
     "codex-cli"
   ],
-  "author": "OpenGSD",
+  "author": "golem15",
   "license": "MIT",
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/open-gsd/gsd-core.git"
+    "url": "git+https://github.com/golem15com/msd-core.git"
   },
-  "homepage": "https://github.com/open-gsd/gsd-core",
+  "homepage": "https://github.com/golem15com/msd-core",
   "bugs": {
-    "url": "https://github.com/open-gsd/gsd-core/issues"
+    "url": "https://github.com/golem15com/msd-core/issues"
   },
   "publishConfig": {
     "access": "public"
@@ -115,7 +115,7 @@
     "validate:registry": "node scripts/validate-registry.cjs",
     "prepack": "npm run build:lib",
     "prepare": "npm run build:lib",
-    "version": "node scripts/sync-manifest-versions.cjs --stage && node scripts/gen-capability-registry.cjs --write && git add gsd-core/bin/lib/capability-registry.cjs",
+    "version": "node scripts/sync-manifest-versions.cjs --stage && node scripts/gen-capability-registry.cjs --write && git add msd-core/bin/lib/capability-registry.cjs",
     "prepublishOnly": "npm run build:lib && npm run build:hooks",
     "pretest": "npm run build:lib && npm run lint:skill-deps",
     "pretest:coverage": "npm run build:lib && npm run lint:skill-deps",
@@ -154,11 +154,11 @@
     "test:slow": "node scripts/run-tests.cjs --suite slow",
     "test:qa": "node scripts/run-tests.cjs --suite qa",
     "test:affected": "node scripts/run-affected-tests.cjs",
-    "test:coverage": "c8 --check-coverage --lines 70 --branches 60 --reporter text --include 'gsd-core/bin/lib/**/*.cjs' --exclude 'tests/**' --all node scripts/run-tests.cjs",
+    "test:coverage": "c8 --check-coverage --lines 70 --branches 60 --reporter text --include 'msd-core/bin/lib/**/*.cjs' --exclude 'tests/**' --all node scripts/run-tests.cjs",
     "test:coverage:scripts-floor": "c8 report --check-coverage --lines 55 --merge-async --include 'scripts/**/*.cjs' --exclude 'tests/**' --all",
-    "test:coverage:unit": "c8 --reporter text --reporter json-summary --merge-async --include 'gsd-core/bin/lib/**/*.cjs' --exclude 'tests/**' --all node scripts/run-tests.cjs --suite unit && node scripts/check-coverage-gate.cjs",
+    "test:coverage:unit": "c8 --reporter text --reporter json-summary --merge-async --include 'msd-core/bin/lib/**/*.cjs' --exclude 'tests/**' --all node scripts/run-tests.cjs --suite unit && node scripts/check-coverage-gate.cjs",
     "test:coverage:unit:raw": "c8 --reporter none --merge-async node scripts/run-tests.cjs --suite unit",
-    "test:coverage:report": "c8 report --reporter text --reporter json-summary --merge-async --include 'gsd-core/bin/lib/**/*.cjs' --exclude 'tests/**' --all && node scripts/check-coverage-gate.cjs",
+    "test:coverage:report": "c8 report --reporter text --reporter json-summary --merge-async --include 'msd-core/bin/lib/**/*.cjs' --exclude 'tests/**' --all && node scripts/check-coverage-gate.cjs",
     "test:coverage:all": "npm run test:coverage",
     "test:mutation": "stryker run",
     "gen:features": "node scripts/gen-features.cjs",