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.

tests/zcode-agent-mcp-grants.install.test.cjs

@@ -11,7 +11,7 @@
  * ZCode's subagent dispatcher treats every `mcp__<server>__*` entry in an agent's
  * `tools:` frontmatter as a REQUIRED MCP server and throws CONFIGURATION_ERROR on
  * spawn when it is not connected. Claude Code treats the same grants as an optional
- * allowlist, which is why the GSD sources carry them. The install must therefore
+ * allowlist, which is why the MSD sources carry them. The install must therefore
  * filter `mcp__*` entries out of the tools list for ZCode — the same outcome Kimi
  * already gets via its own conversion path — while leaving Claude Code's verbatim
  * copy untouched.
@@ -37,18 +37,18 @@ const REPO_ROOT = path.join(__dirname, '..');
 /** The 8 MCP-granted agents named in the issue. Every one hard-fails spawn on
  *  ZCode with zero MCP servers configured, so every one must install clean. */
 const MCP_GRANTED_AGENTS = [
-  'gsd-phase-researcher',
-  'gsd-project-researcher',
-  'gsd-ui-researcher',
-  'gsd-advisor-researcher',
-  'gsd-domain-researcher',
-  'gsd-ai-researcher',
-  'gsd-planner',
-  'gsd-executor',
+  'msd-phase-researcher',
+  'msd-project-researcher',
+  'msd-ui-researcher',
+  'msd-advisor-researcher',
+  'msd-domain-researcher',
+  'msd-ai-researcher',
+  'msd-planner',
+  'msd-executor',
 ];
 
 /** Parse the `tools:` grant list out of an agent .md's YAML frontmatter.
- *  Handles both shapes GSD emits: inline comma list (`tools: A, B, C`) and
+ *  Handles both shapes MSD emits: inline comma list (`tools: A, B, C`) and
  *  YAML block list (`tools:\n  - A\n  - B`). Returns [] when the agent
  *  declares no tools. */
 function parseFrontmatterTools(content) {
@@ -87,7 +87,7 @@ function parseFrontmatterTools(content) {
  *  tests/agent-fragments-emission.install.test.cjs. Returns { result, root }
  *  where root is the install root (config dir for global, project cwd for local). */
 function spawnInstall(runtime, scope, repoRoot = REPO_ROOT) {
-  const root = fs.mkdtempSync(path.join(os.tmpdir(), `gsd-3384-${runtime}-${scope}-`));
+  const root = fs.mkdtempSync(path.join(os.tmpdir(), `msd-3384-${runtime}-${scope}-`));
   const args = ['--preserve-symlinks', '--preserve-symlinks-main', path.join(repoRoot, 'bin', 'install.js'), `--${runtime}`];
   if (scope === 'global') {
     args.push('--global', '--config-dir', root);
@@ -153,11 +153,11 @@ test('zcode local install: all 8 MCP-granted agents install with zero mcp__* too
 });
 
 function zcodeFixture(tools) {
-  return `---\nname: gsd-phase-researcher\ndescription: ZCode quoted-MCP fixture\ntools: ${tools}\n---\n\nfixture body survives\n`;
+  return `---\nname: msd-phase-researcher\ndescription: ZCode quoted-MCP fixture\ntools: ${tools}\n---\n\nfixture body survives\n`;
 }
 
 function zcodeBlockFixture(items) {
-  return `---\nname: gsd-phase-researcher\ndescription: ZCode quoted-MCP fixture\ntools:\n${items.map((item) => `  - ${item}`).join('\n')}\n---\n\nfixture body survives\n`;
+  return `---\nname: msd-phase-researcher\ndescription: ZCode quoted-MCP fixture\ntools:\n${items.map((item) => `  - ${item}`).join('\n')}\n---\n\nfixture body survives\n`;
 }
 
 test('zcode treats quoted MCP scalars as equivalent to plain scalars (#4189)', (t) => {
@@ -177,12 +177,12 @@ test('zcode treats quoted MCP scalars as equivalent to plain scalars (#4189)', (
   ];
 
   for (const row of cases) {
-    const overlay = buildOverlayRepo({ 'agents/gsd-phase-researcher.md': row.source });
+    const overlay = buildOverlayRepo({ 'agents/msd-phase-researcher.md': row.source });
     t.after(() => cleanup(overlay));
     const { result, root } = spawnInstall('zcode', 'global', overlay);
     t.after(() => cleanup(root));
     assert.strictEqual(result.exitCode, 0, `${row.name}: zcode install must succeed\n${result.stderr}`);
-    const emitted = fs.readFileSync(path.join(root, 'agents', 'gsd-phase-researcher.md'), 'utf8');
+    const emitted = fs.readFileSync(path.join(root, 'agents', 'msd-phase-researcher.md'), 'utf8');
     assert.ok(!emitted.includes('mcp__server__'), `${row.name}: all semantic MCP entries must be removed`);
     assert.ok(!emitted.includes('\\x6dcp__server__'), `${row.name}: YAML-escaped semantic MCP entries must be removed`);
     assert.ok(emitted.includes('fixture body survives'), `${row.name}: unrelated body bytes must survive`);
@@ -198,8 +198,8 @@ test('claude global install still carries mcp__* grants (optional-allowlist sema
   t.after(() => cleanup(root));
   assert.strictEqual(result.exitCode, 0,
     `claude global install must succeed\nstdout: ${result.stdout}\nstderr: ${result.stderr}`);
-  const agentPath = path.join(root, 'agents', 'gsd-phase-researcher.md');
-  assert.ok(fs.existsSync(agentPath), 'claude global install must write agents/gsd-phase-researcher.md');
+  const agentPath = path.join(root, 'agents', 'msd-phase-researcher.md');
+  assert.ok(fs.existsSync(agentPath), 'claude global install must write agents/msd-phase-researcher.md');
   const tools = parseFrontmatterTools(fs.readFileSync(agentPath, 'utf8'));
   assert.ok(
     tools.some((tool) => tool.startsWith('mcp__')),