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.

src/model-catalog.cts

@@ -15,8 +15,8 @@ const _require: NodeRequire = require;
 // Resolve model-catalog.json via a prioritised candidate list so the module
 // works in every layout:
 //
-//   1. Co-located install path — gsd-core/bin/shared/model-catalog.json
-//   2. GSD_MODEL_CATALOG env override
+//   1. Co-located install path — msd-core/bin/shared/model-catalog.json
+//   2. MSD_MODEL_CATALOG env override
 //
 // A third candidate — `sdk/shared/model-catalog.json`, three levels up — used to
 // sit between them. It was the legacy source-repo path kept as a fallback by the
@@ -29,7 +29,7 @@ const _require: NodeRequire = require;
 // implies a package boundary this repo no longer has.
 const _catalogCandidates: string[] = [
   path.resolve(__dirname, '..', 'shared', 'model-catalog.json'),
-  ...(process.env['GSD_MODEL_CATALOG'] ? [path.resolve(process.env['GSD_MODEL_CATALOG'])] : []),
+  ...(process.env['MSD_MODEL_CATALOG'] ? [path.resolve(process.env['MSD_MODEL_CATALOG'])] : []),
 ];
 
 /** Typed tier entry from model-catalog.json (model + optional reasoning_effort). */
@@ -148,7 +148,7 @@ export const PROVIDER_PRESETS: Record<string, Record<string, Record<string, Tier
 // ─── #3007 — Codex per-model effort capability ───────────────────────────────
 //
 // Codex's own `models.json` publishes `supported_reasoning_levels` per model and
-// rejects an unsupported level at request time, so GSD must be conservative
+// rejects an unsupported level at request time, so MSD must be conservative
 // about what it sends: read the ceiling as DATA from the catalog (never
 // branch on model id in code) and fall back to the family baseline for any
 // model the catalog doesn't know about.
@@ -198,7 +198,7 @@ export const KNOWN_PROVIDERS: Set<string> = new Set(
 // ─── #3241 — Anthropic-flavored model detection ──────────────────────────────
 //
 // Moved here from src/model-resolver.cts (the "seam decision" in
-// .gsd/phase/feat-3241-codex-omit-model-by-default/40-design.md): this leaf
+// .msd/phase/feat-3241-codex-omit-model-by-default/40-design.md): this leaf
 // module is the one common dependency both model-resolver and the (layering-
 // restricted) install-time Codex-posture checks can share without pulling
 // model-resolver's config-loader dependency chain into a "pure read/verify"
@@ -433,7 +433,7 @@ export function renderEffortForRuntime(runtime: string, universalEffort: string,
 
   if (runtime === 'codex') {
     // #2167 — 'ultra' turns on Codex's automatic task delegation, which would
-    // let Codex spawn agents underneath GSD's own orchestration. GSD rejects
+    // let Codex spawn agents underneath MSD's own orchestration. MSD rejects
     // it unconditionally as a POLICY call, never as a capability clamp — this
     // holds even for a model (e.g. gpt-5.6-sol) that DOES advertise 'ultra',
     // so it is never softened down to 'max'.
@@ -444,7 +444,7 @@ export function renderEffortForRuntime(runtime: string, universalEffort: string,
         channel: null,
         requested: 'ultra',
         clamped: false,
-        reason: "'ultra' turns on Codex's automatic task delegation, which would let Codex spawn agents underneath GSD's own orchestration (#2167); GSD rejects it regardless of what the model advertises.",
+        reason: "'ultra' turns on Codex's automatic task delegation, which would let Codex spawn agents underneath MSD's own orchestration (#2167); MSD rejects it regardless of what the model advertises.",
       };
     }