diff --git a/contracts/go/seats/meshcatalog/contract.go b/contracts/go/seats/meshcatalog/contract.go
index ce517dcb..9bbbb4b5 100644
--- a/contracts/go/seats/meshcatalog/contract.go
+++ b/contracts/go/seats/meshcatalog/contract.go
@@ -590,17 +590,19 @@ type ConfigCandidatesByPullValueDeclaresValueValue struct {
 	Default     any    `json:"default"`
 	Description string `json:"description,omitempty"`
 	// the allowed values
-	Enum       any     `json:"enum,omitempty"`
-	Kind       string  `json:"kind"`
-	Maximum    float64 `json:"maximum,omitempty"`
-	Minimum    float64 `json:"minimum,omitempty"`
-	Pattern    string  `json:"pattern,omitempty"`
-	Predefined string  `json:"predefined,omitempty"`
-	Required   bool    `json:"required,omitempty"`
-	Runtime    bool    `json:"runtime,omitempty"`
-	Trusted    bool    `json:"trusted,omitempty"`
-	Type       string  `json:"type,omitempty"`
-	Why        string  `json:"why"`
+	Enum any    `json:"enum,omitempty"`
+	Kind string `json:"kind"`
+	// a declared bound; 0 is a bound, absent is none
+	Maximum any `json:"maximum,omitempty"`
+	// a declared bound; 0 is a bound, absent is none
+	Minimum    any    `json:"minimum,omitempty"`
+	Pattern    string `json:"pattern,omitempty"`
+	Predefined string `json:"predefined,omitempty"`
+	Required   bool   `json:"required,omitempty"`
+	Runtime    bool   `json:"runtime,omitempty"`
+	Trusted    bool   `json:"trusted,omitempty"`
+	Type       string `json:"type,omitempty"`
+	Why        string `json:"why"`
 }
 
 // ConfigCandidatesByPullValue is one value of the state config-candidates under the key <pull>.
diff --git a/contracts/go/seats/meshcatalog/contract_test.go b/contracts/go/seats/meshcatalog/contract_test.go
index 22bea547..b6d95b15 100644
--- a/contracts/go/seats/meshcatalog/contract_test.go
+++ b/contracts/go/seats/meshcatalog/contract_test.go
@@ -33,6 +33,12 @@ func TestFixtures(t *testing.T) {
 				err := json.Unmarshal(b, &v)
 				return v, err
 			}, subjectIs: nil},
+		{name: "a pull request's configuration state whose bounds are declared 0 (a zero is a bound, not none)", subject: "", given: "{\"declares\":{\"nats\":{\"limit\":{\"default\":0,\"kind\":\"setting\",\"maximum\":0,\"minimum\":0,\"why\":\"a bound\"}}},\"head\":\"cccccccccccccccccccccccccccccccccccccccc\",\"pull\":\"novox/mesh-catalog#1\",\"v\":1}", wire: "{\"declares\":{\"nats\":{\"limit\":{\"default\":0,\"kind\":\"setting\",\"maximum\":0,\"minimum\":0,\"why\":\"a bound\"}}},\"head\":\"cccccccccccccccccccccccccccccccccccccccc\",\"pull\":\"novox/mesh-catalog#1\",\"v\":1}",
+			decode: func(b []byte) (any, error) {
+				var v ConfigCandidatesByPullValue
+				err := json.Unmarshal(b, &v)
+				return v, err
+			}, subjectIs: nil},
 		{name: "a published Go module", subject: "", given: "{\"commit\":\"cccccccccccccccccccccccccccccccccccccccc\",\"module\":\"git.novox.be/novox/mesh-sdk/go\",\"packages\":[{\"digest\":\"ab\",\"package\":\"git.novox.be/novox/mesh-sdk/go/keys\"}],\"repository\":\"novox/mesh-sdk\",\"v\":1}", wire: "{\"commit\":\"cccccccccccccccccccccccccccccccccccccccc\",\"module\":\"git.novox.be/novox/mesh-sdk/go\",\"packages\":[{\"digest\":\"ab\",\"package\":\"git.novox.be/novox/mesh-sdk/go/keys\"}],\"repository\":\"novox/mesh-sdk\",\"v\":1}",
 			decode: func(b []byte) (any, error) { var v PackagesByModuleValue; err := json.Unmarshal(b, &v); return v, err }, subjectIs: nil},
 		{name: "a package series", subject: "", given: "{\"name\":\"go-keys\",\"series\":\"0.1\",\"v\":1}", wire: "{\"name\":\"go-keys\",\"series\":\"0.1\",\"v\":1}",
diff --git a/contracts/seats/mesh-catalog/fixtures/states.json b/contracts/seats/mesh-catalog/fixtures/states.json
index 0ad6086b..43af3306 100644
--- a/contracts/seats/mesh-catalog/fixtures/states.json
+++ b/contracts/seats/mesh-catalog/fixtures/states.json
@@ -81,6 +81,26 @@
       }
     }
   },
+  {
+    "name": "a pull request's configuration state whose bounds are declared 0 (a zero is a bound, not none)",
+    "of": "state:config-candidates/<pull>",
+    "given": {
+      "v": 1,
+      "pull": "novox/mesh-catalog#1",
+      "head": "cccccccccccccccccccccccccccccccccccccccc",
+      "declares": {
+        "nats": {
+          "limit": {
+            "kind": "setting",
+            "default": 0,
+            "why": "a bound",
+            "minimum": 0,
+            "maximum": 0
+          }
+        }
+      }
+    }
+  },
   {
     "name": "a published Go module",
     "of": "state:packages/<module>",
diff --git a/contracts/seats/mesh-catalog/seat.json b/contracts/seats/mesh-catalog/seat.json
index 08301037..13f861f1 100644
--- a/contracts/seats/mesh-catalog/seat.json
+++ b/contracts/seats/mesh-catalog/seat.json
@@ -165,7 +165,7 @@
     },
     {
       "name": "seat-definitions",
-      "description": "The seat list (ADR 0636 \u00a74): with no seat, every trunk seat with its digest and the revision of the list; with a seat, that trunk definition resolved with the parts it includes. Reads only.",
+      "description": "The seat list (ADR 0636 §4): with no seat, every trunk seat with its digest and the revision of the list; with a seat, that trunk definition resolved with the parts it includes. Reads only.",
       "optional": true,
       "input": {
         "properties": {
@@ -244,7 +244,7 @@
       }
     }
   ],
-  "description": "The catalog of the mesh: every module the trunk holds with its manifest, fingerprint and verdict, the packages published, and the seat list (ADR 0636 \u00a71, \u00a74).",
+  "description": "The catalog of the mesh: every module the trunk holds with its manifest, fingerprint and verdict, the packages published, and the seat list (ADR 0636 §1, §4).",
   "family": {
     "name": "mesh-catalog.events",
     "max-age-days": 7
@@ -823,10 +823,18 @@
                         "description": "the allowed values"
                       },
                       "minimum": {
-                        "type": "number"
+                        "type": [
+                          "number",
+                          "null"
+                        ],
+                        "description": "a declared bound; 0 is a bound, absent is none"
                       },
                       "maximum": {
-                        "type": "number"
+                        "type": [
+                          "number",
+                          "null"
+                        ],
+                        "description": "a declared bound; 0 is a bound, absent is none"
                       },
                       "pattern": {
                         "type": "string"
diff --git a/contracts/ts/seats/meshcatalog/src/index.ts b/contracts/ts/seats/meshcatalog/src/index.ts
index 92b3b5a4..096581e6 100644
--- a/contracts/ts/seats/meshcatalog/src/index.ts
+++ b/contracts/ts/seats/meshcatalog/src/index.ts
@@ -426,8 +426,10 @@ export interface ConfigCandidatesByPullValueDeclaresValueValue {
   /** the allowed values */
   "enum"?: unknown;
   "kind": string;
-  "maximum"?: number;
-  "minimum"?: number;
+  /** a declared bound; 0 is a bound, absent is none */
+  "maximum"?: unknown;
+  /** a declared bound; 0 is a bound, absent is none */
+  "minimum"?: unknown;
   "pattern"?: string;
   "predefined"?: string;
   "required"?: boolean;