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.

scripts/ci-test-scope.cjs

@@ -121,7 +121,7 @@ const RULES = [
   },
   {
     name: 'TS runtime sources (ADR-457 build-at-publish)',
-    // src/*.cts compiles into gsd-core/bin/lib/*.cjs; a source-only edit must
+    // src/*.cts compiles into msd-core/bin/lib/*.cjs; a source-only edit must
     // still trigger the migrated module's tests (otherwise CI silently skips them).
     match: path => path.startsWith('src/') || path === 'tsconfig.build.json',
     tests: [
@@ -133,7 +133,7 @@ const RULES = [
   {
     name: 'installer and package layout',
     match: path => path.startsWith('bin/') ||
-      path.startsWith('gsd-core/bin/') ||
+      path.startsWith('msd-core/bin/') ||
       path.includes('install') ||
       path.includes('release-tarball-smoke'),
     fullMatrix: true,
@@ -160,7 +160,7 @@ const RULES = [
     // Every source file the installer EMITS into a runtime layout is captured by
     // the emitted-attribution differential + the install-tree snapshot. A source
     // edit here that changes emitted output MUST re-verify (#2266: a
-    // hooks/gsd-statusline.js edit changed installed output but no rule selected
+    // hooks/msd-statusline.js edit changed installed output but no rule selected
     // the drift guard, so a stale emitted state shipped to next undetected).
     // Union semantics: this ADDS the drift guard on top of each path's existing
     // content-specific tests. Targeted lane only (the real-tree test skips win32
@@ -168,21 +168,21 @@ const RULES = [
     // #2724: golden-install-parity.test.cjs is retired (ADR-2719 Phase 4); the
     // emitted differential (ADR-2719 Phase 2/3) is now the sole gate for a PR
     // editing only shipped content, the archetypal emitted-ripple case.
-    // NOTE: intentionally NOT a blanket 'gsd-core/' prefix, for two reasons:
-    // (1) gsd-core/bin/** is tsc-compiled runtime output — EXCLUDED_PREFIXES-
+    // NOTE: intentionally NOT a blanket 'msd-core/' prefix, for two reasons:
+    // (1) msd-core/bin/** is tsc-compiled runtime output — EXCLUDED_PREFIXES-
     //     excluded from both manifests, and already covered by the 'installer and
-    //     package layout' rule (path.startsWith('gsd-core/bin/')) — so matching it
+    //     package layout' rule (path.startsWith('msd-core/bin/')) — so matching it
     //     here would be pure noise; and
     // (2) enumerating only the installer-shipped content subtrees preserves the
-    //     bug-408 unit-fallback contract: a gsd-core/ path that is NOT shipped
-    //     verbatim (the bug-408 test uses gsd-core/src/some-util.js) must still
+    //     bug-408 unit-fallback contract: a msd-core/ path that is NOT shipped
+    //     verbatim (the bug-408 test uses msd-core/src/some-util.js) must still
     //     fall back to ['unit'] when no rule matches.
-    // Listed: the four gsd-core content subtrees the installer ships verbatim
+    // Listed: the four msd-core content subtrees the installer ships verbatim
     // (contexts, references, templates, workflows) + bin/shared/*.json data files.
-    // Verify against Object.keys(golden fixture) grouped by gsd-core/<subdir>.
+    // Verify against Object.keys(golden fixture) grouped by msd-core/<subdir>.
     match: path =>
-      ['hooks/', 'commands/', 'agents/', 'skills/', 'gsd-core/workflows/', 'gsd-core/templates/', 'gsd-core/references/', 'gsd-core/contexts/', 'scripts/changeset/', 'scripts/lib/'].some(p => path.startsWith(p)) ||
-      (path.startsWith('gsd-core/bin/shared/') && path.endsWith('.json')) ||
+      ['hooks/', 'commands/', 'agents/', 'skills/', 'msd-core/workflows/', 'msd-core/templates/', 'msd-core/references/', 'msd-core/contexts/', 'scripts/changeset/', 'scripts/lib/'].some(p => path.startsWith(p)) ||
+      (path.startsWith('msd-core/bin/shared/') && path.endsWith('.json')) ||
       ['scripts/fix-slash-commands.cjs', 'scripts/gen-capability-registry.cjs', 'scripts/gen-loop-host-contract.cjs'].includes(path),
     tests: [
       'tests/golden-install-tree.test.cjs',
@@ -244,7 +244,7 @@ const RULES = [
   },
   {
     name: 'workflow prompts',
-    match: path => path.startsWith('gsd-core/workflows/'),
+    match: path => path.startsWith('msd-core/workflows/'),
     tests: [
       'tests/workflow-compat.test.cjs',
       'tests/workflow-size-budget.test.cjs',
@@ -254,7 +254,7 @@ const RULES = [
       // consolidation epic #1969 (B6 #1975) and folded into slash-command-namespace.test.cjs
       // ("folded:bug-3683-workflow-colon-namespace-leak" describe block). The stale filename
       // here was itself an instance of this issue's defect class — silently dropped by
-      // existingTests() below, so gsd-core/workflows/ changes stopped re-running this
+      // existingTests() below, so msd-core/workflows/ changes stopped re-running this
       // regression's coverage with nothing signaling it.
       'tests/slash-command-namespace.test.cjs',
     ],
@@ -563,7 +563,7 @@ function classify(files, reachabilityDeps = {}) {
     // rule fired in `reasons` but classify()'s codeChanged gate zeroed out every
     // targeted test because 'skills/' was absent from this list).
     if (
-      ['bin/', 'src/', 'gsd-core/', 'agents/', 'commands/', 'hooks/', 'skills/', 'tests/', 'scripts/', 'eslint-rules/'].some(p => file.startsWith(p)) ||
+      ['bin/', 'src/', 'msd-core/', 'agents/', 'commands/', 'hooks/', 'skills/', 'tests/', 'scripts/', 'eslint-rules/'].some(p => file.startsWith(p)) ||
       file === 'package.json' || file === 'package-lock.json' ||
       (file.startsWith('tsconfig') && file.endsWith('.json')) ||
       file.startsWith('.github/rulesets/')