diff --git a/.campaign/tgz/SHA256SUMS b/.campaign/tgz/SHA256SUMS
index 18e144b..f78f4a2 100644
--- a/.campaign/tgz/SHA256SUMS
+++ b/.campaign/tgz/SHA256SUMS
@@ -1,5 +1,7 @@
 abdbff87d78af3f605b465b1104c9a57fa859fbc14d8bb9ba396a49869269d99  antelopejs-api-6afe3e2.tgz
-633ab682a1ede2ac315ace5ccbbb1d7ff130c6315267c6061a45d1949a0282cb  antelopejs-interface-api-f2a99b5.tgz
+0a51c9c2da58c2586bfa5095b1da92a7b74130acf1e64820bfd5f98eaa4200f9  antelopejs-core-184eb90.tgz
+8e017528574748687b246df07affa6cbcfbe931cc6086fcb5dd2c7a28c1f0d8e  antelopejs-interface-api-015a93a.tgz
 fa0a3cfa243d0c78cd29d45839ae61bbbce5615a7c8d8247755b0cd91c8bedc6  antelopejs-interface-api-util-639f38b.tgz
+30391718e65481815db5b5bb10e7eabb1feac13165005ee46e54b592f3676c69  antelopejs-interface-core-f7df541.tgz
 ccdc833729f50825d3567047a22bf9c68f47a38ca3527117756fbd80f380fabd  antelopejs-interface-database-724ff72.tgz
-89d427c5fcc3c7b3c3818df1a95f686b871e571d4134a571f0ac2be84c601631  antelopejs-interface-database-decorators-e79a62b.tgz
+5ed284901d3e226fd30ec1134c7fe2c44d5637a9c0f2bc198d0863c6b508ae62  antelopejs-interface-database-decorators-1234214.tgz
diff --git a/.campaign/tgz/antelopejs-core-184eb90.tgz b/.campaign/tgz/antelopejs-core-184eb90.tgz
new file mode 100644
index 0000000..de90b08
Binary files /dev/null and b/.campaign/tgz/antelopejs-core-184eb90.tgz differ
diff --git a/.campaign/tgz/antelopejs-interface-api-015a93a.tgz b/.campaign/tgz/antelopejs-interface-api-015a93a.tgz
new file mode 100644
index 0000000..a14002a
Binary files /dev/null and b/.campaign/tgz/antelopejs-interface-api-015a93a.tgz differ
diff --git a/.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz b/.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz
deleted file mode 100644
index f7e4ad6..0000000
Binary files a/.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz and /dev/null differ
diff --git a/.campaign/tgz/antelopejs-interface-core-f7df541.tgz b/.campaign/tgz/antelopejs-interface-core-f7df541.tgz
new file mode 100644
index 0000000..fd9f0fa
Binary files /dev/null and b/.campaign/tgz/antelopejs-interface-core-f7df541.tgz differ
diff --git a/.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz b/.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz
new file mode 100644
index 0000000..e5aff0e
Binary files /dev/null and b/.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz differ
diff --git a/.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz b/.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz
deleted file mode 100644
index 3565095..0000000
Binary files a/.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz and /dev/null differ
diff --git a/.campaign/tgz/ranges.tsv b/.campaign/tgz/ranges.tsv
index 264756c..299c38e 100644
--- a/.campaign/tgz/ranges.tsv
+++ b/.campaign/tgz/ranges.tsv
@@ -13,5 +13,9 @@
 @antelopejs/api	package.json	devDependencies	
 @antelopejs/api	package.json	pnpm.overrides	
 @antelopejs/api	pnpm-workspace.yaml	overrides	
-@antelopejs/api>@antelopejs/interface-core	package.json	pnpm.overrides	
-@antelopejs/api>@antelopejs/interface-core	pnpm-workspace.yaml	overrides	
+@antelopejs/interface-core	package.json	devDependencies	^0.2.6
+@antelopejs/interface-core	package.json	pnpm.overrides	
+@antelopejs/interface-core	pnpm-workspace.yaml	overrides	
+@antelopejs/core	package.json	devDependencies	~1.17.0
+@antelopejs/core	package.json	pnpm.overrides	
+@antelopejs/core	pnpm-workspace.yaml	overrides	
diff --git a/README.md b/README.md
index dc9eb4f..c4b3df0 100644
--- a/README.md
+++ b/README.md
@@ -125,11 +125,11 @@ The package declares these `@antelopejs/*` peer dependencies:
 
 | Package                                     | Supported         | Tested with                                                               |
 | ------------------------------------------- | ----------------- | ------------------------------------------------------------------------- |
-| `@antelopejs/interface-api`                 | `>=0.3.0 <1.0.0`  | `file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz`                 |
+| `@antelopejs/interface-api`                 | `>=0.3.0 <1.0.0`  | `file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz`                 |
 | `@antelopejs/interface-api-util`            | `>=0.1.3 <1.0.0`  | `file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz`            |
-| `@antelopejs/interface-core`                | `>=0.2.4 <1.0.0`  | `0.2.7`                                                                   |
+| `@antelopejs/interface-core`                | `>=0.2.4 <1.0.0`  | `file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz`                |
 | `@antelopejs/interface-database`            | `>=0.1.10 <1.0.0` | `file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz`            |
-| `@antelopejs/interface-database-decorators` | `>=0.1.10 <1.0.0` | `file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz` |
+| `@antelopejs/interface-database-decorators` | `>=0.1.10 <1.0.0` | `file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz` |
 
 <!-- antelopejs-docs-compat:end -->
 
diff --git a/guardrails.ratchet.json b/guardrails.ratchet.json
index 34fa6fb..4dbcf74 100644
--- a/guardrails.ratchet.json
+++ b/guardrails.ratchet.json
@@ -2,7 +2,6 @@
   "pack": "0.2.17",
   "rules": {
     "anti-slop/no-unsafe-dictionary-type": 1,
-    "typescript/no-unsafe-argument": 12,
     "typescript/no-unsafe-return": 2
   },
   "oversizeFiles": {}
diff --git a/package.json b/package.json
index 51c98d9..3187272 100644
--- a/package.json
+++ b/package.json
@@ -74,12 +74,12 @@
   },
   "devDependencies": {
     "@antelopejs/api": "file:.campaign/tgz/antelopejs-api-6afe3e2.tgz",
-    "@antelopejs/core": "~1.17.0",
-    "@antelopejs/interface-api": "file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz",
+    "@antelopejs/core": "file:.campaign/tgz/antelopejs-core-184eb90.tgz",
+    "@antelopejs/interface-api": "file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz",
     "@antelopejs/interface-api-util": "file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz",
-    "@antelopejs/interface-core": "^0.2.6",
+    "@antelopejs/interface-core": "file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz",
     "@antelopejs/interface-database": "file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz",
-    "@antelopejs/interface-database-decorators": "file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz",
+    "@antelopejs/interface-database-decorators": "file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz",
     "@antelopejs/tooling-configs": "^0.2.17",
     "@types/chai": "^4.3.20",
     "@types/mocha": "^10.0.10",
@@ -109,11 +109,12 @@
   "pnpm": {
     "overrides": {
       "@antelopejs/interface-database": "file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz",
-      "@antelopejs/interface-database-decorators": "file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz",
-      "@antelopejs/interface-api": "file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz",
+      "@antelopejs/interface-database-decorators": "file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz",
+      "@antelopejs/interface-api": "file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz",
       "@antelopejs/interface-api-util": "file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz",
       "@antelopejs/api": "file:.campaign/tgz/antelopejs-api-6afe3e2.tgz",
-      "@antelopejs/api>@antelopejs/interface-core": "0.2.7"
+      "@antelopejs/interface-core": "file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz",
+      "@antelopejs/core": "file:.campaign/tgz/antelopejs-core-184eb90.tgz"
     }
   },
   "antelopeJs": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index eec9085..8f5c19c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -6,38 +6,39 @@ settings:
 
 overrides:
   '@antelopejs/interface-database': file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz
-  '@antelopejs/interface-database-decorators': file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz
-  '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz
+  '@antelopejs/interface-database-decorators': file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz
+  '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz
   '@antelopejs/interface-api-util': file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz
   '@antelopejs/api': file:.campaign/tgz/antelopejs-api-6afe3e2.tgz
-  '@antelopejs/api>@antelopejs/interface-core': 0.2.7
+  '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
+  '@antelopejs/core': file:.campaign/tgz/antelopejs-core-184eb90.tgz
 
 importers:
 
   .:
     dependencies:
       '@antelopejs/interface-api':
-        specifier: file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz
-        version: file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7)
+        specifier: file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz
+        version: file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
       '@antelopejs/interface-api-util':
         specifier: file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz
-        version: file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7))(@antelopejs/interface-core@0.2.7)
+        version: file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
+      '@antelopejs/interface-core':
+        specifier: file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
+        version: file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
       '@antelopejs/interface-database':
         specifier: file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz
-        version: file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@0.2.7)
+        version: file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
       '@antelopejs/interface-database-decorators':
-        specifier: file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz
-        version: file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7))(@antelopejs/interface-core@0.2.7)(@antelopejs/interface-database@file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@0.2.7))
+        specifier: file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz
+        version: file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)(@antelopejs/interface-database@file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))
     devDependencies:
       '@antelopejs/api':
         specifier: file:.campaign/tgz/antelopejs-api-6afe3e2.tgz
-        version: file:.campaign/tgz/antelopejs-api-6afe3e2.tgz(@antelopejs/core@1.17.1)
+        version: file:.campaign/tgz/antelopejs-api-6afe3e2.tgz(@antelopejs/core@file:.campaign/tgz/antelopejs-core-184eb90.tgz)
       '@antelopejs/core':
-        specifier: ~1.17.0
-        version: 1.17.1
-      '@antelopejs/interface-core':
-        specifier: ^0.2.6
-        version: 0.2.7
+        specifier: file:.campaign/tgz/antelopejs-core-184eb90.tgz
+        version: file:.campaign/tgz/antelopejs-core-184eb90.tgz
       '@antelopejs/tooling-configs':
         specifier: ^0.2.17
         version: 0.2.17(eslint-plugin-perfectionist@5.11.0(eslint@10.10.0(jiti@2.7.0))(typescript@5.9.3))(knip@6.34.0)(oxfmt@0.66.0)(oxlint@1.81.0(oxlint-tsgolint@7.0.2001))
@@ -101,9 +102,10 @@ packages:
       '@antelopejs/core':
         optional: true
 
-  '@antelopejs/core@1.17.1':
-    resolution: {integrity: sha512-gul38oMJuiaLl5MEwinRbM6d08uPI2wqCmDDrI5V+VilcxJA025VF1l1CqNta3xQfszvRr/jt4RzOgUlhKJi/g==}
-    engines: {node: '>=20.19'}
+  '@antelopejs/core@file:.campaign/tgz/antelopejs-core-184eb90.tgz':
+    resolution: {integrity: sha512-CsiXLalRIIxX5YHjMUVDlz0+zBGSeNjSNPdBTgHwVsWpT1bIeG8izJmbCgpi5tIs8rvxkdlEZ6eKa7yH1GK8CA==, tarball: file:.campaign/tgz/antelopejs-core-184eb90.tgz}
+    version: 1.20.0
+    engines: {node: ^20.19.0 || >=22.12.0}
     hasBin: true
 
   '@antelopejs/interface-api-util@file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz':
@@ -113,17 +115,18 @@ packages:
       '@antelopejs/interface-api': '>=0.3.0 <1.0.0'
       '@antelopejs/interface-core': '>=0.2.4 <1.0.0'
 
-  '@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz':
-    resolution: {integrity: sha512-pF423v3AMpaak5uLd/Q7TXoT+CXqxZXHQmSbEeik7eGfS+2Fsc2k1x/IR1gX4Hje8QuqLMZmkgT/eDyGXl/p2A==, tarball: file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz}
+  '@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz':
+    resolution: {integrity: sha512-G7BRef+991Dn+O4zmxGE8f8KN5Xfj5GQa+W3LQo0f+XHhRUCz2E+brTIonhjV7HJ5Z+lFNrm4StPytwNIUxA5Q==, tarball: file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz}
     version: 0.3.0
     peerDependencies:
-      '@antelopejs/interface-core': '>=0.2.4 <1.0.0'
+      '@antelopejs/interface-core': '>=0.4.0 <1.0.0'
 
-  '@antelopejs/interface-core@0.2.7':
-    resolution: {integrity: sha512-2zWWTxSMutyqVbnr/xfGtjgIcx2x4zLZk6wOQkXDgX+i0DVPw6DOE/nsUHGP4uGrVAYg6b1z4oLdTV1NMAyZjA==}
+  '@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz':
+    resolution: {integrity: sha512-ur2KLvtD8h4SCZ0VSoQDc1pg+E9Bk/py3EW3qHHdoo3i6RvKWrrDKsX2khVdqQESuF2QMc1sJ6B+7ISjx5TvpQ==, tarball: file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz}
+    version: 0.4.0
 
-  '@antelopejs/interface-database-decorators@file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz':
-    resolution: {integrity: sha512-IO3ovOrBj5yWA39lNFqgr8+oJhjy8bzBTbgFvx369afjGO2J1i3J0+riEbZZzQ5fTx1qYV5gYuyx+BdoQBf+BQ==, tarball: file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz}
+  '@antelopejs/interface-database-decorators@file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz':
+    resolution: {integrity: sha512-vHjhTLclmWleAEamSNcic9sl8/tZRP7xunXdAWy35dOF2KHn2UYcguREtGAp98Ph81ciVVc9ir+RTveVCaS9VA==, tarball: file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz}
     version: 0.2.0
     peerDependencies:
       '@antelopejs/interface-api': '>=0.0.15 <1.0.0'
@@ -2828,22 +2831,22 @@ packages:
 
 snapshots:
 
-  '@antelopejs/api@file:.campaign/tgz/antelopejs-api-6afe3e2.tgz(@antelopejs/core@1.17.1)':
+  '@antelopejs/api@file:.campaign/tgz/antelopejs-api-6afe3e2.tgz(@antelopejs/core@file:.campaign/tgz/antelopejs-core-184eb90.tgz)':
     dependencies:
-      '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7)
-      '@antelopejs/interface-api-util': file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7))(@antelopejs/interface-core@0.2.7)
-      '@antelopejs/interface-core': 0.2.7
+      '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
+      '@antelopejs/interface-api-util': file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
+      '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
       reflect-metadata: 0.2.2
       ws: 8.22.1
     optionalDependencies:
-      '@antelopejs/core': 1.17.1
+      '@antelopejs/core': file:.campaign/tgz/antelopejs-core-184eb90.tgz
     transitivePeerDependencies:
       - bufferutil
       - utf-8-validate
 
-  '@antelopejs/core@1.17.1':
+  '@antelopejs/core@file:.campaign/tgz/antelopejs-core-184eb90.tgz':
     dependencies:
-      '@antelopejs/interface-core': 0.2.7
+      '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
       '@clack/prompts': 1.8.1
       '@types/proper-lockfile': 4.1.4
       commander: 13.1.0
@@ -2856,30 +2859,30 @@ snapshots:
       semver: 7.7.4
       typescript: 5.9.3
 
-  '@antelopejs/interface-api-util@file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7))(@antelopejs/interface-core@0.2.7)':
+  '@antelopejs/interface-api-util@file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)':
     dependencies:
-      '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7)
-      '@antelopejs/interface-core': 0.2.7
+      '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
+      '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
 
-  '@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7)':
+  '@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)':
     dependencies:
-      '@antelopejs/interface-core': 0.2.7
+      '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
 
-  '@antelopejs/interface-core@0.2.7':
+  '@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz':
     dependencies:
       reflect-metadata: 0.2.2
 
-  '@antelopejs/interface-database-decorators@file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7))(@antelopejs/interface-core@0.2.7)(@antelopejs/interface-database@file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@0.2.7))':
+  '@antelopejs/interface-database-decorators@file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz(@antelopejs/interface-api@file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)(@antelopejs/interface-database@file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz))':
     dependencies:
-      '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz(@antelopejs/interface-core@0.2.7)
-      '@antelopejs/interface-core': 0.2.7
-      '@antelopejs/interface-database': file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@0.2.7)
+      '@antelopejs/interface-api': file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
+      '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
+      '@antelopejs/interface-database': file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)
       randomstring: 1.3.1
       reflect-metadata: 0.2.2
 
-  '@antelopejs/interface-database@file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@0.2.7)':
+  '@antelopejs/interface-database@file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz(@antelopejs/interface-core@file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz)':
     dependencies:
-      '@antelopejs/interface-core': 0.2.7
+      '@antelopejs/interface-core': file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz
 
   '@antelopejs/tooling-configs@0.2.17(eslint-plugin-perfectionist@5.11.0(eslint@10.10.0(jiti@2.7.0))(typescript@5.9.3))(knip@6.34.0)(oxfmt@0.66.0)(oxlint@1.81.0(oxlint-tsgolint@7.0.2001))':
     dependencies:
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 0fe766f..0e3a33c 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -1,7 +1,8 @@
 overrides:
   "@antelopejs/interface-database": "file:.campaign/tgz/antelopejs-interface-database-724ff72.tgz"
-  "@antelopejs/interface-database-decorators": "file:.campaign/tgz/antelopejs-interface-database-decorators-e79a62b.tgz"
-  "@antelopejs/interface-api": "file:.campaign/tgz/antelopejs-interface-api-f2a99b5.tgz"
+  "@antelopejs/interface-database-decorators": "file:.campaign/tgz/antelopejs-interface-database-decorators-1234214.tgz"
+  "@antelopejs/interface-api": "file:.campaign/tgz/antelopejs-interface-api-015a93a.tgz"
   "@antelopejs/interface-api-util": "file:.campaign/tgz/antelopejs-interface-api-util-639f38b.tgz"
   "@antelopejs/api": "file:.campaign/tgz/antelopejs-api-6afe3e2.tgz"
-  "@antelopejs/api>@antelopejs/interface-core": "0.2.7"
+  "@antelopejs/interface-core": "file:.campaign/tgz/antelopejs-interface-core-f7df541.tgz"
+  "@antelopejs/core": "file:.campaign/tgz/antelopejs-core-184eb90.tgz"
diff --git a/src/index.ts b/src/index.ts
index 7567fbe..9b1c149 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -25,6 +25,7 @@ import type { WriteDocument } from "@antelopejs/interface-database/common";
 
 import { Parameters, Query, Validation } from "./components";
 import { isWriteDocument, isWriteValue } from "./internal/guards";
+import { prototypeOf } from "./internal/prototypes";
 import {
   DataAPIMeta,
   type DataControllerCallback,
@@ -92,22 +93,21 @@ export function DataController<
 export const RegisterDataController =
   (): ClassDecorator<ControllerClass> => (target) => {
     const meta = GetMetadata(target, DataAPIMeta);
+    const prototype = prototypeOf(target);
     for (const [key, entry] of Object.entries(meta.endpoints)) {
       for (let i = 0; i < entry.callback.args.length; ++i) {
         const arg = entry.callback.args[i];
         if (Array.isArray(arg)) {
           for (const step of arg) {
-            step(target.prototype, key, i);
+            step(prototype, key, i);
           }
         } else {
-          arg(target.prototype, key, i);
+          arg(prototype, key, i);
         }
       }
-      const meta = GetMetadata(target, ControllerMeta);
-      const fullLocation = `${meta.location}/${entry.endpoint ?? key}`.replace(
-        /\/+/g,
-        "/",
-      );
+      const controllerMeta = GetMetadata(target, ControllerMeta);
+      const fullLocation =
+        `${target.location}/${entry.endpoint ?? key}`.replace(/\/+/g, "/");
       RegisterRoute({
         callback: (ctx: Parameters.DataRequestContext) => {
           ctx.dataAPIEntry = entry;
@@ -116,16 +116,12 @@ export const RegisterDataController =
         method: entry.callback.method,
         mode: "prefix",
         parameters: [{ provider: (ctx) => ctx, modifiers: [] }],
-        properties: meta.computed_props,
+        properties: controllerMeta.computed_props,
         controller: target,
       });
-      Route("handler", entry.callback.method, entry.endpoint)(
-        target.prototype,
-        key,
-        {
-          value: entry.callback.func,
-        },
-      );
+      Route("handler", entry.callback.method, entry.endpoint)(prototype, key, {
+        value: entry.callback.func,
+      });
     }
   };
 
diff --git a/src/internal/guards.ts b/src/internal/guards.ts
index d236515..573881d 100644
--- a/src/internal/guards.ts
+++ b/src/internal/guards.ts
@@ -23,9 +23,14 @@ export function isFunction(value: unknown): value is Function {
   return typeof value === "function";
 }
 
-/** Whether a value is a class: a function, which `new` may call. */
+/**
+ * Whether a value is a class: a function with an object `prototype`, which
+ * arrow functions, methods and bound functions lack. A generator function
+ * has one too, a language limit this check shares with every `prototype`
+ * test.
+ */
 export function isClass(value: unknown): value is Class<object> {
-  return isFunction(value);
+  return isFunction(value) && isObject(value.prototype);
 }
 
 /** Whether a value is a number. */
diff --git a/src/metadata.ts b/src/metadata.ts
index 6e6d540..e7a8bc2 100644
--- a/src/metadata.ts
+++ b/src/metadata.ts
@@ -7,6 +7,7 @@ import {
 } from "@antelopejs/interface-database-decorators";
 import {
   type Class,
+  type DecoratorTarget,
   MakeMethodAndPropertyDecorator,
   MakePropertyDecorator,
 } from "@antelopejs/interface-core/decorators";
@@ -36,7 +37,7 @@ import {
   rebuildPluck,
   targetJoinedFields,
 } from "./internal/meta-records";
-import { isString } from "./internal/guards";
+import { isClass, isString } from "./internal/guards";
 import { classOf } from "./internal/prototypes";
 import { resolveTableReference } from "./internal/table-reference";
 
@@ -504,12 +505,16 @@ export class DataAPIMeta {
 
 /** Declares a decorated field; a symbol-named property declares none. */
 function onField(
-  target: { constructor: Class },
+  target: DecoratorTarget,
   key: PropertyKey,
   declare: (meta: DataAPIMeta, name: string) => void,
 ) {
   if (!isString(key)) return;
-  declare(GetMetadata(target.constructor, DataAPIMeta), key);
+  const owner = target.constructor;
+  if (!isClass(owner)) {
+    throw new TypeError("A field decorator applies to a class.");
+  }
+  declare(GetMetadata(owner, DataAPIMeta), key);
 }
 
 /**
@@ -703,7 +708,7 @@ const FilterDecoratorFactory = MakePropertyDecorator(
 export function Filter<T extends Record<string, any>>(
   func?: FilterFunction<T, T>,
   useIndex?: boolean,
-): (target: T, propertyKey: string | symbol) => void {
+) {
   return FilterDecoratorFactory(func, useIndex);
 }
 
diff --git a/src/tests/index/field_decorator_target.test.ts b/src/tests/index/field_decorator_target.test.ts
new file mode 100644
index 0000000..40656fc
--- /dev/null
+++ b/src/tests/index/field_decorator_target.test.ts
@@ -0,0 +1,27 @@
+import { expect } from "chai";
+import { GetMetadata } from "@antelopejs/interface-core";
+import { Access, AccessMode, DataAPIMeta } from "../../metadata";
+
+const REFUSAL = "A field decorator applies to a class.";
+
+describe("field decorators - target", () => {
+  it("refuses a target whose constructor is an arrow function", () => {
+    const target = { constructor: () => undefined };
+
+    expect(() => Access(AccessMode.ReadOnly)(target, "title")).to.throw(
+      TypeError,
+      REFUSAL,
+    );
+  });
+
+  it("declares the field on a target whose constructor is a class", () => {
+    class Target {
+      declare title: string;
+    }
+
+    Access(AccessMode.ReadOnly)(Target.prototype, "title");
+
+    const { fields } = GetMetadata(Target, DataAPIMeta);
+    expect(Object.hasOwn(fields, "title")).to.equal(true);
+  });
+});