diff --git a/packages/cultnet-rs/tests/schema_discovery_contracts.rs b/packages/cultnet-rs/tests/schema_discovery_contracts.rs
index 7c62b80f..833f40c3 100644
--- a/packages/cultnet-rs/tests/schema_discovery_contracts.rs
+++ b/packages/cultnet-rs/tests/schema_discovery_contracts.rs
@@ -18,85 +18,66 @@
 //! Vendoring is a second copy of files this repo already treats as canonical
 //! (`contracts/cultnet/*.schema.json`, the shared source multiple runtimes compile against per
 //! `docs/cultnet-selection-cut.md` section 1). A second copy can drift silently, so this test is
-//! the thing that makes that impossible without a loud, immediate failure: every vendored file is
-//! compared byte-for-byte against its repo-root original. It skips (not fails) when the canonical
+//! the thing that makes that impossible without a loud, immediate failure: every `*.schema.json`
+//! under the vendored `contracts/cultnet/` is compared byte-for-byte against its repo-root
+//! original. The files are found by listing the directory, not from a list kept by hand, so a newly
+//! vendored copy cannot escape the check. It skips (not fails) when the canonical
 //! `contracts/` tree is not present beside the package - i.e. exactly the isolated-copy situation
 //! R-AB exists to survive - so this check does not reintroduce the same escape it is guarding
-//! against.
+//! against. A schema embedded by `schema_discovery.rs` but not vendored fails to compile.
 
 use std::fs;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 
-/// Every schema this crate's `schema_discovery::builtin_schema_registry` embeds via
-/// `include_str!("../contracts/cultnet/…")` - kept in sync with `schema_discovery.rs` by hand;
-/// a schema added there and not here is still caught, because the crate would then fail to
-/// compile against a file this list never copied to `contracts/cultnet/`.
-const VENDORED_SCHEMAS: &[&str] = &[
-    "cultnet.hello.schema.json",
-    "cultnet.document-mutation-contract.schema.json",
-    "cultnet.transport-profile.schema.json",
-    "cultnet.login.schema.json",
-    "cultnet.register.schema.json",
-    "cultnet.verify.schema.json",
-    "cultnet.login-success.schema.json",
-    "cultnet.error.schema.json",
-    "cultnet.sample-change-name.schema.json",
-    "cultnet.sample-chat.schema.json",
-    "cultnet.document-put.schema.json",
-    "cultnet.document-delete.schema.json",
-    "cultnet.raw-document-record.schema.json",
-    "cultnet.document-put-raw.schema.json",
-    "cultnet.snapshot-request.schema.json",
-    "cultnet.snapshot-response.schema.json",
-    "cultnet.snapshot-response-raw.schema.json",
-    "cultnet.schema-catalog-request.schema.json",
-    "cultnet.schema-catalog-response.schema.json",
-    "cultnet.shard-catalog-request.schema.json",
-    "cultnet.shard-catalog-response.schema.json",
-    "ghostlight.agent-state.schema.json",
-];
-
-#[test]
-fn vendored_contract_schemas_are_present_and_match_every_include_str_call() {
-    let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
-    let vendored_root = manifest_dir.join("contracts/cultnet");
-    for name in VENDORED_SCHEMAS {
-        let path = vendored_root.join(name);
-        assert!(
-            path.is_file(),
-            "{name} is embedded by schema_discovery.rs but missing from the vendored \
-             contracts/cultnet/ copy at {path:?}"
-        );
+/// Every `*.schema.json` under `root`, as paths relative to it, sorted.
+fn schema_files(root: &Path) -> Vec<PathBuf> {
+    fn walk(root: &Path, dir: &Path, found: &mut Vec<PathBuf>) {
+        for entry in fs::read_dir(dir).unwrap_or_else(|error| panic!("listing {dir:?}: {error}")) {
+            let path = entry.expect("directory entry").path();
+            if path.is_dir() {
+                walk(root, &path, found);
+            } else if path.to_string_lossy().ends_with(".schema.json") {
+                found.push(path.strip_prefix(root).expect("path under root").to_path_buf());
+            }
+        }
     }
+    let mut found = Vec::new();
+    walk(root, root, &mut found);
+    found.sort();
+    found
+}
+
+fn vendored_root() -> PathBuf {
+    Path::new(env!("CARGO_MANIFEST_DIR")).join("contracts/cultnet")
 }
 
 #[test]
 fn vendored_contract_schemas_match_the_canonical_repo_root_source() {
-    let manifest_dir = Path::new(env!("CARGO_MANIFEST_DIR"));
-    let vendored_root = manifest_dir.join("contracts/cultnet");
     // packages/cultnet-rs -> packages -> repo root -> contracts/cultnet
-    let canonical_root = manifest_dir.join("../../contracts/cultnet");
+    let canonical_root = Path::new(env!("CARGO_MANIFEST_DIR")).join("../../contracts/cultnet");
 
     if !canonical_root.is_dir() {
         // R-AB: exactly the isolated-copy case this crate's own vendored files exist to survive
         // (cargo-mutants, or any tool that copies only this package's directory). Nothing to
         // compare against, and that is expected, not a failure.
         eprintln!(
-            "skipping: {canonical_root:?} not present beside the package (isolated build, \
-             the case R-AB's vendored copies are for)"
+            "skipping: {canonical_root:?} not present beside the package (isolated build, the case R-AB's vendored copies are for)"
         );
         return;
     }
 
-    for name in VENDORED_SCHEMAS {
-        let canonical = fs::read_to_string(canonical_root.join(name))
-            .unwrap_or_else(|error| panic!("reading canonical contracts/cultnet/{name}: {error}"));
-        let vendored = fs::read_to_string(vendored_root.join(name))
-            .unwrap_or_else(|error| panic!("reading vendored contracts/cultnet/{name}: {error}"));
+    let vendored = schema_files(&vendored_root());
+    assert!(!vendored.is_empty(), "no vendored schemas found under {:?}", vendored_root());
+    for name in vendored {
+        let shown = name.display();
+        let canonical = fs::read_to_string(canonical_root.join(&name)).unwrap_or_else(|error| {
+            panic!("packages/cultnet-rs/contracts/cultnet/{shown} has no canonical contracts/cultnet/{shown}: {error}")
+        });
+        let copy = fs::read_to_string(vendored_root().join(&name))
+            .unwrap_or_else(|error| panic!("reading vendored contracts/cultnet/{shown}: {error}"));
         assert_eq!(
-            canonical, vendored,
-            "packages/cultnet-rs/contracts/cultnet/{name} has drifted from the canonical \
-             contracts/cultnet/{name} - re-copy it"
+            canonical, copy,
+            "packages/cultnet-rs/contracts/cultnet/{shown} has drifted from the canonical contracts/cultnet/{shown} - re-copy it"
         );
     }
 }
@@ -107,7 +88,7 @@ fn builtin_schema_registry_loads_every_vendored_schema() {
     let listed = registry.list(&cultnet_rs::CultNetSchemaCatalogOptions::default());
     assert_eq!(
         listed.len(),
-        VENDORED_SCHEMAS.len(),
+        schema_files(&vendored_root()).len(),
         "one registration per vendored schema file"
     );
 }