Remove the extracted lithoglyph tree — it existed in two places

.github/workflows/placement-guard.yml

@@ -56,7 +56,15 @@ jobs:
           ALLOW="$ALLOW"'|^(flake\.nix|guix\.scm|Justfile|contractile\.just|stapeln\.toml|opsm\.toml|setup\.sh|\.gitignore|\.gitattributes|\.editorconfig|\.gitlab-ci\.yml|\.nojekyll)$'
 
           # Legacy per-database dirs (grandfathered: warn, do not fail — being extracted).
-          GRANDFATHER='^(verisimdb|lithoglyph|quandledb|nqc|typeql-experimental|verisim-core|verisim-modular-experiment)/'
+          #
+          # `lithoglyph` was removed from this list on 2026-07-27. Its extraction is
+          # complete (hyperpolymath/lithoglyph#4) and its 819 files are gone from this
+          # repo, so a new file under lithoglyph/ is no longer "legacy content not yet
+          # moved" — it is fresh duplication of a repo that already exists. Warning
+          # would let exactly the defect the extraction fixed grow back. It now fails.
+          #
+          # Move a directory out of this list as each extraction completes.
+          GRANDFATHER='^(verisimdb|quandledb|nqc|typeql-experimental|verisim-core|verisim-modular-experiment)/'
 
           FAIL=0
           while IFS= read -r f; do

CLAUDE.md

@@ -40,7 +40,12 @@ See **`REGISTRY.adoc`** for the authoritative map. Examples: VeriSimDB →
 
 ### Transitional note
 
-The directories `verisimdb/`, `lithoglyph/`, `quandledb/`, `nqc/`,
+`lithoglyph/` is **done**: extraction completed 2026-07-27 and its 819 files were
+removed, leaving a pointer README. Everything it held is preserved at its original
+path in the `split-history/lithoglyph` tag on `origin` — never prune that tag or the
+`_split_lithoglyph` branch.
+
+The directories `verisimdb/`, `quandledb/`, `nqc/`,
 `typeql-experimental/`, `verisim-core/`, and `verisim-modular-experiment/` are **legacy
 content being extracted** to their own repos — see
 `docs/migration/RESITE-DATABASES-TO-OWN-REPOS.adoc`. **Do not grow them.** A CI guard

REGISTRY.adoc

@@ -74,8 +74,19 @@ case) and `docs/LITHOGLYPH.adoc` (what it gives Lithoglyph specifically).
 
 == Reference strategy (after extraction)
 
-Hybrid: `verisimdb` and `lithoglyph` are git submodules of this coordination repo; every other
-repo is referenced by link from this registry.
+Every repo is referenced by link from this registry. There are no git submodules.
+
+This previously read "`verisimdb` and `lithoglyph` are git submodules of this
+coordination repo". That was never true of either: `git ls-files --stage` showed both as
+ordinary tracked files, not gitlinks, and no `.gitmodules` has ever existed here.
+Corrected in favour of what the repo does rather than adding submodule machinery to
+make a stale sentence true — a submodule would have to be fetched with
+`submodules: recursive` in every workflow that touches the tree, which is real cost for
+a coordination repo that only needs to *point* at its members.
+
+`lithoglyph/` now holds a pointer README only; its 819 files were removed once the
+extraction completed (2026-07-27). `verisimdb/` is still 714 tracked files awaiting the
+same treatment.
 
 == What belongs in *this* (coordination) repo