claude: fold in old sow-tools

docs/command-surface.md

@@ -25,19 +25,21 @@ These legacy commands are **not** top-level builders:
 - `music *` (`list-datasets`, `scan`, `build`, `credits`, `validate`, `manifest`,
   `normalize`) → folds into the **module/hak build pipeline** (music BMUs are
   packed into HAKs at build time). Exposed as `crucible-module music ...` /
-  `crucible-hak music ...` when wired. Needs `ffmpeg` at runtime.
+  `crucible-hak music ...`. Needs `ffmpeg` at runtime (in the image).
 - `config *` (`validate`, `effective`, `inspect`, `explain`, `sources`) → a
-  **global** concern shared by every builder; exposed as a global subcommand
-  group, not its own binary.
-- `build-changelog` → release tooling; lands as a global `crucible changelog`
+  **global** concern shared by every builder; exposed as the global
+  `crucible config ...`, not its own binary.
+- `build-changelog` → release tooling; exposed as the global `crucible changelog`
   rather than a content builder.
 
-## Global commands (implemented in the scaffold)
+## Global commands (implemented)
 
 ```text
 crucible help | -h          usage + builder list
 crucible version | -V       build version (git sha via -ldflags)
 crucible list               builders, one per line: name<TAB>bin<TAB>summary
+crucible config [args]      -> legacy `config` command group
+crucible changelog [args]   -> legacy `build-changelog`
 ```
 
 `crucible list` is machine-readable so CI can enumerate builders without parsing