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.

commands/msd/map-codebase.md

@@ -0,0 +1,83 @@
+---
+name: msd:map-codebase
+description: Analyze codebase with parallel mapper agents to produce .planning/codebase/ documents
+argument-hint: "[--fast [--focus tech|arch|quality|concerns]] [--query <term>|status|diff|refresh] [area]"
+allowed-tools:
+  - Read
+  - Bash
+  - Glob
+  - Grep
+  - Write
+  - Agent
+requires: [config, new-project, plan-phase, onboard]
+---
+
+<objective>
+Analyze existing codebase using parallel msd-codebase-mapper agents to produce structured codebase documents.
+
+Each mapper agent explores a focus area and **writes documents directly** to `.planning/codebase/`. The orchestrator only receives confirmations, keeping context usage minimal.
+
+Output: .planning/codebase/ folder with 7 structured documents about the codebase state.
+</objective>
+
+<execution_context>
+@~/.claude/msd-core/workflows/map-codebase.md
+</execution_context>
+
+<flags>
+- **--fast**: Lightweight scan mode — spawns one mapper agent instead of four. Accepts an optional `--focus` value: `tech`, `arch`, `quality`, `concerns`, or `tech+arch` (default). Faster and lower-context than the full map.
+- **--query**: Codebase intelligence query mode. Sub-commands: `query <term>`, `status`, `diff`, `refresh`. Requires intel to be enabled in config (`intel.enabled: true`). Runs inline for query/status/diff; spawns an agent for refresh.
+- **(no flag)**: Full parallel map — spawns 4 mapper agents to produce all 7 codebase documents.
+</flags>
+
+<context>
+Arguments: $ARGUMENTS
+
+Parse the first token of $ARGUMENTS:
+- If it is `--fast`: strip the flag, then read and execute `~/.claude/msd-core/workflows/scan.md` (passing remaining args including optional --focus). Load it on demand here — it is deliberately not in `<execution_context>`, so the common full-map path does not pay for it.
+- If it is `--query`: strip the flag, run the intel workflow (passing remaining args as the subcommand).
+- Otherwise: pass all of $ARGUMENTS as focus area to the map-codebase workflow.
+
+**Load project state if exists:**
+Check for .planning/STATE.md - loads context if project already initialized
+
+**This command can run:**
+- Via /msd:onboard for first-time brownfield setup - creates codebase map first
+- After /msd:new-project (greenfield codebases) - updates codebase map as code evolves
+- Anytime to refresh codebase understanding
+</context>
+
+<when_to_use>
+**Use map-codebase for:**
+- Brownfield projects before initialization (understand existing code first)
+- Refreshing codebase map after significant changes
+- Refreshing or deepening an onboarded codebase map
+- Before major refactoring (understand current state)
+- When STATE.md references outdated codebase info
+
+**Skip map-codebase for:**
+- Greenfield projects with no code yet (nothing to map)
+- Trivial codebases (<5 files)
+</when_to_use>
+
+<process>
+1. Check if .planning/codebase/ already exists (offer to refresh or skip)
+2. Create .planning/codebase/ directory structure
+3. Spawn 4 parallel msd-codebase-mapper agents:
+   - Agent 1: tech focus → writes STACK.md, INTEGRATIONS.md
+   - Agent 2: arch focus → writes ARCHITECTURE.md, STRUCTURE.md
+   - Agent 3: quality focus → writes CONVENTIONS.md, TESTING.md
+   - Agent 4: concerns focus → writes CONCERNS.md
+4. Wait for agents to complete, collect confirmations (NOT document contents)
+5. Verify all 7 documents exist with line counts
+6. Commit codebase map
+7. Offer next steps (typically: /msd:onboard, /msd:new-project, or /msd:plan-phase)
+</process>
+
+<success_criteria>
+- [ ] .planning/codebase/ directory created
+- [ ] All 7 codebase documents written by mapper agents
+- [ ] Documents follow template structure
+- [ ] Parallel agents completed without errors
+- [ ] User knows next steps
+</success_criteria>