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/chunked-planning-parallel.test.cjs

@@ -4,8 +4,8 @@
  * Failing-first tests for #3777 (opt-in concurrent per-plan planners in
  * chunked mode).
  *
- * Design:      .gsd/phase/feat-3777-chunked-parallel-planners/40-design.md
- * Test matrix: .gsd/phase/feat-3777-chunked-parallel-planners/50-test-matrix.md
+ * Design:      .msd/phase/feat-3777-chunked-parallel-planners/40-design.md
+ * Test matrix: .msd/phase/feat-3777-chunked-parallel-planners/50-test-matrix.md
  *
  * Two real, shipped bash blocks are extracted and EXECUTED (never re-typed), both from
  * chunked-planning-mode.md:
@@ -26,17 +26,17 @@ const {
   createTempProject,
   cleanup,
   readFileNormalized,
-  runGsdTools,
+  runMsdTools,
 } = require('./helpers.cjs');
 const { runHook } = require('./helpers/process-seam.cjs');
 const { HOOK_FANOUT_TIMEOUT_MS } = require('./helpers/timeouts.cjs');
-const { scanFencedBlocks } = require('../gsd-core/bin/lib/markdown-sectionizer.cjs');
+const { scanFencedBlocks } = require('../msd-core/bin/lib/markdown-sectionizer.cjs');
 
 const REPO_ROOT = path.join(__dirname, '..');
 const CHUNKED_MODE_MD_PATH = path.join(
-  REPO_ROOT, 'gsd-core', 'workflows', 'plan-phase', 'steps', 'chunked-planning-mode.md',
+  REPO_ROOT, 'msd-core', 'workflows', 'plan-phase', 'steps', 'chunked-planning-mode.md',
 );
-const RUNTIME_LAUNCHER_SNIPPET_PATH = path.join(REPO_ROOT, 'gsd-core', 'workflows', '_runtime-launcher.snippet.sh');
+const RUNTIME_LAUNCHER_SNIPPET_PATH = path.join(REPO_ROOT, 'msd-core', 'workflows', '_runtime-launcher.snippet.sh');
 
 // ─── extraction (source-text-is-the-product) ──────────────────────────────
 
@@ -58,7 +58,7 @@ function extractBashFenceContaining(content, mustInclude, label, filePath) {
  * CHUNKED_PARALLEL resolution fence in production (tests/runtime-launcher-parity.test.cjs
  * owns verifying its placement/uniqueness). Strip it here so this suite tests
  * only the resolution logic it's actually about, not the preamble's own
- * gsd_run-shim-resolution behavior (which would stomp this file's `gsd_run`
+ * msd_run-shim-resolution behavior (which would stomp this file's `msd_run`
  * stub — see #3777 investigation).
  */
 function stripRuntimeLauncherPreamble(block) {
@@ -93,18 +93,18 @@ function extractBatchPlanIdsDedup() {
 // ─── runners ────────────────────────────────────────────────────────────────
 
 /**
- * Runs the real extracted CHUNKED_PARALLEL resolution block with a `gsd_run`
+ * Runs the real extracted CHUNKED_PARALLEL resolution block with a `msd_run`
  * stub spliced in front of it. Returns the resolved `CHUNKED_PARALLEL` value
  * as a string ("true"/"false"), exactly as production code reads it.
  */
 function runChunkedParallelResolution(t, opts) {
-  const scriptDir = createTempDir('gsd-3777-script-');
+  const scriptDir = createTempDir('msd-3777-script-');
   t.after(() => cleanup(scriptDir));
 
   const block = extractChunkedParallelResolution();
 
   const stub = [
-    'gsd_run() {',
+    'msd_run() {',
     '  if [ "$1" = "query" ] && [ "$2" = "config-get" ] && [ "$3" = "planning.chunked_parallel" ]; then',
     '    if [ "$STUB_CONFIG_GET_FAILS" = "1" ]; then',
     '      return 1',
@@ -165,7 +165,7 @@ function runChunkedParallelResolution(t, opts) {
  * orchestrator populates it from outline rows).
  */
 function runBatchDedup(t, waveIds) {
-  const scriptDir = createTempDir('gsd-3777-dedup-script-');
+  const scriptDir = createTempDir('msd-3777-dedup-script-');
   t.after(() => cleanup(scriptDir));
 
   const block = extractBatchPlanIdsDedup();
@@ -303,7 +303,7 @@ describe('#3777 planning.chunked_parallel config key', () => {
     const tmpDir = createTempProject();
     t.after(() => cleanup(tmpDir));
 
-    const setResult = runGsdTools('config-set planning.chunked_parallel true', tmpDir);
+    const setResult = runMsdTools('config-set planning.chunked_parallel true', tmpDir);
     assert.ok(setResult.success, `config-set failed: ${setResult.error}`);
 
     const configPath = path.join(tmpDir, '.planning', 'config.json');
@@ -311,7 +311,7 @@ describe('#3777 planning.chunked_parallel config key', () => {
     assert.equal(config.planning?.chunked_parallel, true);
     assert.equal(typeof config.planning?.chunked_parallel, 'boolean');
 
-    const getResult = runGsdTools('config-get planning.chunked_parallel --raw', tmpDir);
+    const getResult = runMsdTools('config-get planning.chunked_parallel --raw', tmpDir);
     assert.ok(getResult.success, `config-get failed: ${getResult.error}`);
     assert.equal((getResult.output || '').trim(), 'true');
   });
@@ -320,7 +320,7 @@ describe('#3777 planning.chunked_parallel config key', () => {
     const tmpDir = createTempProject();
     t.after(() => cleanup(tmpDir));
 
-    const setResult = runGsdTools('config-set planning.chunked_parallel false', tmpDir);
+    const setResult = runMsdTools('config-set planning.chunked_parallel false', tmpDir);
     assert.ok(setResult.success, `config-set failed: ${setResult.error}`);
 
     const configPath = path.join(tmpDir, '.planning', 'config.json');
@@ -336,7 +336,7 @@ describe('#3777 planning.chunked_parallel config key', () => {
     // Extra "l" — proves the whitelist is load-bearing and the two tests
     // above are not vacuous (they'd pass even for an unregistered key if
     // config-set accepted anything).
-    const result = runGsdTools('config-set planning.chunked_parallell true', tmpDir);
+    const result = runMsdTools('config-set planning.chunked_parallell true', tmpDir);
     assert.equal(result.success, false, 'an unregistered near-miss key must be rejected');
   });
 });