docs: scope check-dupes to paths-only; add depot pipeline migration charter

check-dupes ports directory mode only; the --manifests hak-scoped check is
manifest-integrity and moves to the depot pipeline migration. Add that
follow-up as a charter spec (import/sync/export + mdl gate + manifest dupes
into `crucible depot`), marked draft pending its own brainstorming.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/superpowers/specs/2026-07-12-crucible-assets-builder-design.md

@@ -30,8 +30,8 @@ Seven commands:
   model-name mismatches (read-only).
 - `crucible assets fix-mdl` — lowercase `.mdl` filenames and rewrite ASCII
   model/root names to match each file's stem.
-- `crucible assets check-dupes` — report runtime-name (basename) collisions in
-  directories, or hak-scoped collisions across `assets/*.yml` manifests.
+- `crucible assets check-dupes` — report runtime-name (basename) collisions
+  across directories.
 - `crucible assets clean-dupes` — delete files from a "clean" tree whose
   basename collides with anything in a "primary" tree.
 
@@ -235,21 +235,21 @@ candidate only if it needs a content fix (name mismatch) or a filename
 lowercase, so the expensive per-file read/rewrite runs only on the few that
 matter, not the whole tree.
 
-## `crucible assets check-dupes [--manifests] <dir>…`
+## `crucible assets check-dupes <dir>…`
 
-Port of `check-duplicate-names.sh`. Read-only. NWN packs hak entries by
-basename, not path, so files at different paths with the same basename
-(case-insensitively) silently clobber on pack. This flags them.
-
-- Directory mode (default): across all `<dir>` args, report any two files whose
-  lowercased basename matches.
-- `--manifests`: additionally read every `assets/*.yml` in the current repo and
-  report basename collisions **within the same hak** (`.assets[].path` grouped
-  by `.assets[].hak`), reusing Crucible's existing `gopkg.in/yaml.v3` parsing.
-  Requires no external `yq`.
+Port of `check-duplicate-names.sh`'s **directory mode only**. Read-only. NWN
+packs hak entries by basename, not path, so files at different paths with the
+same basename (case-insensitively) silently clobber on pack. Across all `<dir>`
+args, report any two files whose lowercased basename matches.
 
 Exit non-zero if any collision is found.
 
+The script's `--manifests` mode (hak-scoped collisions read from `assets/*.yml`)
+is **not** ported here — it inspects manifest structure, not files on disk, so
+it belongs with the manifest/depot tooling. It moves in the follow-up spec (see
+Out of scope); until then `sow-assets-manifest` keeps
+`check-duplicate-names.sh` solely for that mode.
+
 ## `crucible assets clean-dupes [--dry-run] <primary> <clean>`
 
 Port of `clean-duplicate-names.sh`. Deletes files from the `<clean>` tree whose
@@ -269,22 +269,24 @@ Exit zero on success with a count of removed (or would-remove) files.
 (`crucible.sh`) and uses `crucible depot` from its Makefile, so it resolves a
 released `crucible` with zero extra setup.
 
-- **Delete** the four folded driver scripts: `scripts/check-ascii-mdl.sh`,
-  `scripts/fix-mdl-model-names.sh`, `scripts/check-duplicate-names.sh`,
-  `scripts/clean-duplicate-names.sh`.
+- **Delete** the three fully-folded driver scripts: `scripts/check-ascii-mdl.sh`,
+  `scripts/fix-mdl-model-names.sh`, `scripts/clean-duplicate-names.sh`.
 - **Repoint** the Makefile targets to the wrapper:
   - `check-mdl` → `./crucible.sh assets check-mdl …`
   - `fix-mdl` → `./crucible.sh assets fix-mdl [--dry-run] …`
-  - `check-dupes` → `./crucible.sh assets check-dupes …` and
-    `./crucible.sh assets check-dupes --manifests`
+  - `check-dupes` — its directory scan → `./crucible.sh assets check-dupes …`;
+    the `check-duplicate-names.sh --manifests` line stays as-is.
   - `clean-dupes` → `./crucible.sh assets clean-dupes [--dry-run] <PRIMARY> <CLEAN>`
-  - the `haks` target's `check-duplicate-names.sh --manifests` guard →
-    `./crucible.sh assets check-dupes --manifests`
-- **Keep for now:** `scripts/mdl-scan.awk` and `scripts/mdl-name-lib.sh`. They
-  are still sourced by `import.sh` for its batched pre-import gate (~28× faster
-  than per-file, on a hot path). They retire in the follow-up below. Because
-  both the awk classifier and the Go `mdl` module must agree, the port keeps
-  detection byte-for-byte identical (a shared fixture set checks this).
+- **Keep for now:**
+  - `scripts/check-duplicate-names.sh` — kept **only** for its `--manifests`
+    mode, still called by the `check` and `haks` targets. Its directory mode is
+    superseded by `crucible assets check-dupes`. Ported and deleted in the
+    follow-up.
+  - `scripts/mdl-scan.awk` and `scripts/mdl-name-lib.sh` — still sourced by
+    `import.sh` for its batched pre-import gate (~28× faster than per-file, on a
+    hot path). They retire in the follow-up too. Because both the awk classifier
+    and the Go `mdl` module must agree, the port keeps detection byte-for-byte
+    identical (a shared fixture set checks this).
 
 Nothing in `sow-assets-manifest` is committed by this project's plan except the
 script deletions and Makefile edits; that repo's change lands as its own commit
@@ -292,12 +294,15 @@ once the new `crucible` release with `assets` is available.
 
 ## Out of scope — follow-up spec
 
-Moving the **depot-interacting pipeline** (`import.sh`, `sync-assets.sh`,
-`export.sh`, and the inline mdl gate) into `crucible depot` is a separate
-project with its own spec. When `import.sh` becomes `crucible depot import`, its
-gate uses the in-process `internal/assets/mdl` module and
-`scripts/mdl-scan.awk` + `scripts/mdl-name-lib.sh` are deleted. This spec
-deliberately stops at the standalone integrity tools to keep one focused plan.
+Moving the **depot-interacting pipeline** into `crucible depot` is a separate
+project with its own spec
+(`2026-07-12-crucible-depot-pipeline-migration-design.md`). It covers
+`import.sh`, `sync-assets.sh`, `export.sh`, the inline mdl gate, and the
+`check-duplicate-names.sh --manifests` manifest-collision check. When that lands:
+its gate uses the in-process `internal/assets/mdl` module, and
+`scripts/mdl-scan.awk`, `scripts/mdl-name-lib.sh`, and
+`scripts/check-duplicate-names.sh` are all deleted. This spec deliberately stops
+at the standalone, file-on-disk integrity tools to keep one focused plan.
 
 ## Error handling
 
@@ -327,8 +332,7 @@ Go tests in `internal/assets`:
   a model that then passes `CheckNames`. A parity fixture set shared in intent
   with `mdl-scan.awk` so the Go port and the still-present awk agree.
 - `check-dupes`/`clean-dupes`: temp trees asserting basename-collision
-  detection (case-insensitive), the `--manifests` hak-scoped path against a
-  small `assets/*.yml` fixture, the overlap guard, and `--dry-run` mutating
+  detection (case-insensitive), the overlap guard, and `--dry-run` mutating
   nothing.
 
 External engine/upscaler calls are exercised through the `run` indirection with