diff --git a/python/python/lancedb/db.py b/python/python/lancedb/db.py
index 7ac96408e..d99806b76 100644
--- a/python/python/lancedb/db.py
+++ b/python/python/lancedb/db.py
@@ -737,10 +737,12 @@ class DBConnection(EnforceOverrides):
         )
 
     def drop_function(self, name: str, *, version: str) -> bool:
-        """Drop one exact immutable Function version from the remote catalog.
+        """Remove the current Function name binding from the remote catalog.
 
-        Returns True when the version changed to Dropped and False for an
-        idempotent replay. Local connections raise NotImplementedError.
+        The requested version must exist in the currently named object.
+        Object history and existing computed-column references are retained.
+        Returns True when the name was removed and False when it was absent.
+        Local connections raise NotImplementedError.
         """
         raise NotImplementedError(
             "Function catalog operations are not supported for this connection type"
@@ -2297,7 +2299,7 @@ class AsyncConnection(object):
         ]
 
     async def drop_function(self, name: str, *, version: str) -> bool:
-        """Drop one exact immutable Function version from the remote catalog."""
+        """Remove the current name binding, retaining the object and its history."""
         return await self._inner.drop_function(name, version)
 
     async def list_jobs(self) -> List[JobInfo]:
diff --git a/python/python/lancedb/functions.py b/python/python/lancedb/functions.py
index ca5b396f2..692bc5756 100644
--- a/python/python/lancedb/functions.py
+++ b/python/python/lancedb/functions.py
@@ -41,6 +41,7 @@ from typing import (
 
 import pyarrow as pa
 from pydantic import (
+    AfterValidator,
     BaseModel,
     ConfigDict,
     Field,
@@ -303,14 +304,31 @@ class FunctionImage(_RemoteValue):
     source: bool
 
 
+def _validate_object_version(value: str) -> str:
+    if int(value) > 2**64 - 1:
+        raise ValueError("Function version exceeds uint64")
+    return value
+
+
+_ObjectVersion = Annotated[
+    str,
+    Field(strict=True, pattern=r"^[1-9][0-9]*$"),
+    AfterValidator(_validate_object_version),
+]
+
+
 class FunctionVersion(_RemoteValue):
-    """An immutable catalog name bound to a concrete OCI Function image."""
+    """A pinned object revision, independent of its executable image digest."""
 
     name: str
-    version: str
+    object_id: str
+    location: str
+    version: _ObjectVersion
     image: FunctionImage
     signature: FunctionSignature
     created_at: str
+    metadata: Mapping[str, str]
+    disabled: bool
 
     def __call__(self, **inputs: Any) -> FunctionApplication:
         """Bind this exact version to named table columns.
@@ -364,7 +382,13 @@ class FunctionVersion(_RemoteValue):
                 )
             )
         return FunctionApplication(
-            function=FunctionVersionRef(name=self.name, version=self.version),
+            function=FunctionVersionRef(
+                name=self.name,
+                object_id=self.object_id,
+                location=self.location,
+                version=self.version,
+                manifest_digest=self.image.manifest_digest,
+            ),
             inputs=tuple(bindings),
             output=self.signature.output,
         )
@@ -381,7 +405,10 @@ class FunctionRegistrationRequest(_RemoteValue):
 
 class FunctionVersionRef(_OpenRemoteValue):
     name: str
-    version: str
+    object_id: str
+    location: str
+    version: _ObjectVersion
+    manifest_digest: str
 
 
 class ApplicationInput(_OpenRemoteValue):
diff --git a/python/python/tests/test_first_class_function_slice1.py b/python/python/tests/test_first_class_function_slice1.py
index 124f9a6ef..459212b0f 100644
--- a/python/python/tests/test_first_class_function_slice1.py
+++ b/python/python/tests/test_first_class_function_slice1.py
@@ -93,17 +93,22 @@ def test_function_version_identity_is_immutable_and_exact():
     value = job_result("remote_function_job.json")
     version = FunctionVersion.from_json(json.dumps(value))
     assert version.name == "embed"
-    assert version.version == version.image.manifest_digest
-    assert version.version.startswith("sha256:")
+    assert version.version == "1"
+    assert version.image.manifest_digest.startswith("sha256:")
+    assert version.version != version.image.manifest_digest
 
     with pytest.raises((TypeError, ValueError)):
-        version.version = "fv_changed"
+        version.version = "1"
     with pytest.raises(TypeError, match="immutable"):
         version.image.descriptor["format_version"] = "changed"
 
     changed = dict(value)
-    changed["version"] = "fv_changed"
+    changed["version"] = "2"
     assert FunctionVersion(**changed) != version
+    assert FunctionVersion(**changed).image == version.image
+    for invalid in [version.image.manifest_digest, "0", "01", "-1", str(2**64)]:
+        with pytest.raises(ValueError):
+            FunctionVersion(**{**value, "version": invalid})
 
 
 def test_function_version_binds_named_columns_as_one_immutable_application():
@@ -138,7 +143,7 @@ def test_function_version_binding_validates_names_and_direct_columns():
 def test_function_version_keeps_named_struct_outputs_in_one_application():
     value = job_result("remote_function_job.json")
     value["name"] = "text_features"
-    value["version"] = "fv_multi_output"
+    value["version"] = "1"
     value["signature"] = {
         "inputs": [
             {"name": "title", "arrow_type": "utf8", "nullable": True},
@@ -223,7 +228,7 @@ def test_function_application_uses_rename_columns_only():
 
 def test_binding_and_refresh_result_keep_stable_remote_fields():
     binding = FunctionBinding.from_json(fixture("remote_function_binding.json"))
-    assert binding.function.version == "fv_01K3TEXT"
+    assert binding.function.version == "1"
     assert [output.output_ordinal for output in binding.outputs] == [0, 1]
     assert binding.input_schema is not None
     assert binding.output_schema is not None
@@ -340,7 +345,16 @@ def test_rename_requires_named_struct_and_keeps_partial_mapping_immutable():
     scalar = FunctionApplication.from_json(
         json.dumps(
             {
-                "function": {"name": "embed", "version": "fv_exact"},
+                "function": {
+                    "name": "embed",
+                    "version": "1",
+                    "object_id": "fixture",
+                    "location": "memory:///fixture",
+                    "manifest_digest": (
+                        "sha256:"
+                        "7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
+                    ),
+                },
                 "inputs": [],
                 "output": {
                     "kind": "scalar",
diff --git a/python/python/tests/test_first_class_function_slice2.py b/python/python/tests/test_first_class_function_slice2.py
index 16038b67a..8d4f75f67 100644
--- a/python/python/tests/test_first_class_function_slice2.py
+++ b/python/python/tests/test_first_class_function_slice2.py
@@ -45,7 +45,7 @@ FIXTURES = (
 )
 
 
-IMAGE_VERSION = json.loads(
+FUNCTION_VERSION = json.loads(
     (FIXTURES / "remote_function_version.canonical.json").read_text()
 )["version"]
 
@@ -1204,11 +1204,11 @@ def test_local_function_catalog_operations_are_not_supported(tmp_path):
     with pytest.raises(NotImplementedError, match=message):
         db.create_function_async(normalize_score)
     with pytest.raises(NotImplementedError, match=message):
-        db.get_function("normalize_score", version=IMAGE_VERSION)
+        db.get_function("normalize_score", version=FUNCTION_VERSION)
     with pytest.raises(NotImplementedError, match=message):
         db.list_functions()
     with pytest.raises(NotImplementedError, match=message):
-        db.drop_function("normalize_score", version=IMAGE_VERSION)
+        db.drop_function("normalize_score", version=FUNCTION_VERSION)
 
 
 @contextlib.contextmanager
@@ -1235,7 +1235,11 @@ def _mock_remote_function_catalog():
             if self.path == "/v1/function/normalize_score/create":
                 state["version"] = {
                     "name": "normalize_score",
-                    "version": IMAGE_VERSION,
+                    "version": FUNCTION_VERSION,
+                    "object_id": "fixture",
+                    "location": "memory:///fixture",
+                    "metadata": {},
+                    "disabled": False,
                     "image": json.loads(
                         (
                             FIXTURES / "remote_function_version.canonical.json"
@@ -1255,10 +1259,10 @@ def _mock_remote_function_catalog():
                     "result": state["version"],
                 }
             elif self.path == "/v1/function/normalize_score/describe":
-                assert body == {"version": IMAGE_VERSION}
+                assert body == {"version": FUNCTION_VERSION}
                 response = state["version"]
             elif self.path == "/v1/function/normalize_score/drop":
-                assert body == {"version": IMAGE_VERSION}
+                assert body == {"version": FUNCTION_VERSION}
                 response = {"dropped": True}
             else:
                 status = 404
@@ -1281,7 +1285,7 @@ def _mock_remote_function_catalog():
                     "functions": [
                         {
                             "name": "normalize_score",
-                            "version": IMAGE_VERSION,
+                            "version": FUNCTION_VERSION,
                             "definition": state["version"],
                         }
                     ],
@@ -1317,7 +1321,7 @@ def test_remote_registration_job_and_exact_version_reopen_round_trip():
 
     assert created == reopened
     assert reopened.name == "normalize_score"
-    assert reopened.version == IMAGE_VERSION
+    assert reopened.version == FUNCTION_VERSION
     create_request = state["requests"][0][1]
     expected_request = json.loads(
         normalize_score.registration_request.to_canonical_json()
@@ -1337,7 +1341,7 @@ def test_blocking_remote_registration_returns_function_version():
         created = db.create_function(normalize_score)
 
     assert created.name == "normalize_score"
-    assert created.version == IMAGE_VERSION
+    assert created.version == FUNCTION_VERSION
     assert [path for path, _ in state["requests"]] == [
         "/v1/function/normalize_score/create",
         "/v1/jobs/describe",
@@ -1395,12 +1399,12 @@ def test_remote_drop_function_sends_exact_version():
             host_override=host,
             client_config={"retry_config": {"retries": 0}},
         )
-        assert db.drop_function("normalize_score", version=IMAGE_VERSION) is True
+        assert db.drop_function("normalize_score", version=FUNCTION_VERSION) is True
 
     assert state["requests"] == [
         (
             "/v1/function/normalize_score/drop",
-            {"version": IMAGE_VERSION},
+            {"version": FUNCTION_VERSION},
         )
     ]
 
@@ -1414,11 +1418,13 @@ async def test_async_remote_drop_function_sends_exact_version():
             host_override=host,
             client_config={"retry_config": {"retries": 0}},
         )
-        assert await db.drop_function("normalize_score", version=IMAGE_VERSION) is True
+        assert (
+            await db.drop_function("normalize_score", version=FUNCTION_VERSION) is True
+        )
 
     assert state["requests"] == [
         (
             "/v1/function/normalize_score/drop",
-            {"version": IMAGE_VERSION},
+            {"version": FUNCTION_VERSION},
         )
     ]
diff --git a/rust/lancedb/src/connection.rs b/rust/lancedb/src/connection.rs
index 8b0c16537..00dd1836d 100644
--- a/rust/lancedb/src/connection.rs
+++ b/rust/lancedb/src/connection.rs
@@ -631,7 +631,7 @@ impl Connection {
         self.internal.list_functions().await
     }
 
-    /// Drop one exact immutable Function version from the remote catalog.
+    /// Remove the current Function name binding, retaining the object history.
     ///
     /// Returns `true` when the server appended a Dropped transition and
     /// `false` for an idempotent replay. Local databases return
diff --git a/rust/lancedb/src/database.rs b/rust/lancedb/src/database.rs
index 41e5768e0..7ee000453 100644
--- a/rust/lancedb/src/database.rs
+++ b/rust/lancedb/src/database.rs
@@ -313,7 +313,7 @@ pub trait Database:
     async fn list_functions(&self) -> Result<Vec<crate::function::FunctionVersion>> {
         function_catalog_not_supported()
     }
-    /// Drop one exact immutable Function version from the remote catalog.
+    /// Remove the current Function name binding, retaining the object history.
     async fn drop_function(&self, _name: &str, _version: &str) -> Result<bool> {
         function_catalog_not_supported()
     }
diff --git a/rust/lancedb/src/function.rs b/rust/lancedb/src/function.rs
index 7d679027b..d501541c0 100644
--- a/rust/lancedb/src/function.rs
+++ b/rust/lancedb/src/function.rs
@@ -88,10 +88,18 @@ fn application_has_unknown_nested_fields(value: &Value) -> bool {
     let Some(application) = value.as_object() else {
         return false;
     };
-    if application
-        .get("function")
-        .is_some_and(|value| has_unknown_keys(value, &["name", "version"]))
-    {
+    if application.get("function").is_some_and(|value| {
+        has_unknown_keys(
+            value,
+            &[
+                "name",
+                "object_id",
+                "location",
+                "version",
+                "manifest_digest",
+            ],
+        )
+    }) {
         return true;
     }
     if application
@@ -404,17 +412,55 @@ pub struct FunctionImage {
     pub source: bool,
 }
 
-/// An immutable catalog name bound to a concrete OCI manifest.
+fn deserialize_object_version<'de, D: Deserializer<'de>>(
+    deserializer: D,
+) -> std::result::Result<String, D::Error> {
+    let value = String::deserialize(deserializer)?;
+    match value.parse::<u64>() {
+        Ok(number) if number > 0 && number.to_string() == value => Ok(value),
+        _ => Err(de::Error::custom(
+            "Function version must be a canonical positive uint64",
+        )),
+    }
+}
+
+/// One immutable Function object revision and its executable artifact.
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct FunctionVersion {
     name: String,
+    object_id: String,
+    location: String,
+    #[serde(deserialize_with = "deserialize_object_version")]
     version: String,
     image: FunctionImage,
     signature: FunctionSignature,
     created_at: String,
+    metadata: BTreeMap<String, String>,
+    disabled: bool,
 }
 
 impl FunctionVersion {
+    pub fn object_id(&self) -> &str {
+        &self.object_id
+    }
+    pub fn location(&self) -> &str {
+        &self.location
+    }
+    pub fn metadata(&self) -> &BTreeMap<String, String> {
+        &self.metadata
+    }
+    pub fn disabled(&self) -> bool {
+        self.disabled
+    }
+    pub fn reference(&self) -> FunctionVersionRef {
+        FunctionVersionRef {
+            name: self.name.clone(),
+            object_id: self.object_id.clone(),
+            location: self.location.clone(),
+            version: self.version.clone(),
+            manifest_digest: self.image.manifest_digest.clone(),
+        }
+    }
     pub fn name(&self) -> &str {
         &self.name
     }
@@ -482,7 +528,11 @@ impl_json!(FunctionRegistrationRequest);
 #[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
 pub struct FunctionVersionRef {
     pub name: String,
+    pub object_id: String,
+    pub location: String,
+    #[serde(deserialize_with = "deserialize_object_version")]
     pub version: String,
+    pub manifest_digest: String,
 }
 
 /// Parameter binding in a FunctionApplication.
diff --git a/rust/lancedb/src/remote/db.rs b/rust/lancedb/src/remote/db.rs
index de291ad0e..d42472c29 100644
--- a/rust/lancedb/src/remote/db.rs
+++ b/rust/lancedb/src/remote/db.rs
@@ -2864,10 +2864,7 @@ mod tests {
         assert_eq!(job.id(), Some("job-function-1"));
         let version = job.wait().await.unwrap();
         assert_eq!(version.name(), "embed");
-        assert_eq!(
-            version.version(),
-            "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
-        );
+        assert_eq!(version.version(), "1");
     }
 
     #[tokio::test]
@@ -2880,24 +2877,12 @@ mod tests {
             assert_eq!(request.url().path(), "/v1/function/embed/describe");
             let body: serde_json::Value =
                 serde_json::from_slice(request.body().unwrap().as_bytes().unwrap()).unwrap();
-            assert_eq!(
-                body,
-                serde_json::json!({"version": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"})
-            );
+            assert_eq!(body, serde_json::json!({"version": "1"}));
             http::Response::builder().status(200).body(VERSION).unwrap()
         });
-        let version = conn
-            .get_function(
-                "embed",
-                "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6",
-            )
-            .await
-            .unwrap();
+        let version = conn.get_function("embed", "1").await.unwrap();
         assert_eq!(version.name(), "embed");
-        assert_eq!(
-            version.version(),
-            "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
-        );
+        assert_eq!(version.version(), "1");
     }
 
     #[tokio::test]
@@ -2928,7 +2913,7 @@ mod tests {
                             serde_json::json!({
                                 "functions": [{
                                     "name": "embed",
-                                    "version": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6",
+                                    "version": "1",
                                     "definition": version.clone(),
                                 }],
                             })
@@ -2941,10 +2926,7 @@ mod tests {
         let functions = conn.list_functions().await.unwrap();
         assert_eq!(functions.len(), 1);
         assert_eq!(functions[0].name(), "embed");
-        assert_eq!(
-            functions[0].version(),
-            "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
-        );
+        assert_eq!(functions[0].version(), "1");
     }
 
     #[tokio::test]
@@ -3026,24 +3008,13 @@ mod tests {
             assert_eq!(request.url().path(), "/v1/function/embed/drop");
             let body: serde_json::Value =
                 serde_json::from_slice(request.body().unwrap().as_bytes().unwrap()).unwrap();
-            assert_eq!(
-                body,
-                serde_json::json!({"version": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"})
-            );
+            assert_eq!(body, serde_json::json!({"version": "1"}));
             http::Response::builder()
                 .status(200)
                 .body(r#"{"dropped":false}"#)
                 .unwrap()
         });
-        assert!(
-            !conn
-                .drop_function(
-                    "embed",
-                    "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
-                )
-                .await
-                .unwrap()
-        );
+        assert!(!conn.drop_function("embed", "1").await.unwrap());
     }
 
     #[tokio::test]
diff --git a/rust/lancedb/src/remote/job.rs b/rust/lancedb/src/remote/job.rs
index 519e563d4..80256421a 100644
--- a/rust/lancedb/src/remote/job.rs
+++ b/rust/lancedb/src/remote/job.rs
@@ -285,10 +285,7 @@ mod tests {
     async fn typed_remote_job_fixtures_decode_terminal_results() {
         let function = Job::<FunctionVersion>::new_typed(Box::new(FixtureRemoteJob(FUNCTION_JOB)));
         let result = function.wait().await.expect("typed FunctionVersion result");
-        assert_eq!(
-            result.version(),
-            "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
-        );
+        assert_eq!(result.version(), "1");
 
         let refresh =
             Job::<RefreshColumnResult>::new_typed(Box::new(FixtureRemoteJob(REFRESH_JOB)));
diff --git a/rust/lancedb/src/remote/table.rs b/rust/lancedb/src/remote/table.rs
index 7eae6edf7..c8695b3c8 100644
--- a/rust/lancedb/src/remote/table.rs
+++ b/rust/lancedb/src/remote/table.rs
@@ -7742,7 +7742,7 @@ mod tests {
         });
         let application = crate::function::FunctionApplication::from_json(
             r#"{
-                "function":{"name":"embed","version":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
+                "function":{"name":"embed","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[{"parameter":"text","kind":"column","value":{"path":"description"}}],
                 "output":{"kind":"scalar","arrow_type":"list<float32>","nullable":false}
             }"#,
@@ -7819,7 +7819,7 @@ mod tests {
             });
         let application = crate::function::FunctionApplication::from_json(
             r#"{
-                "function":{"name":"text_features","version":"fv_01K3TEXT"},
+                "function":{"name":"text_features","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[
                     {"parameter":"title","kind":"column","value":{"path":"title"}},
                     {"parameter":"body","kind":"column","value":{"path":"body"}}
@@ -7875,7 +7875,7 @@ mod tests {
         });
         let application = crate::function::FunctionApplication::from_json(
             r#"{
-                "function":{"name":"embed","version":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
+                "function":{"name":"embed","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[{"parameter":"text","kind":"column","value":{"path":"description"}}],
                 "output":{"kind":"scalar","arrow_type":"fixed_size_list<float32, 3>","nullable":false}
             }"#,
@@ -7920,7 +7920,7 @@ mod tests {
         });
         let application = crate::function::FunctionApplication::from_json(
             r#"{
-                "function":{"name":"text_features","version":"fv_01K3TEXT"},
+                "function":{"name":"text_features","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[
                     {"parameter":"title","kind":"column","value":{"path":"title"}},
                     {"parameter":"body","kind":"column","value":{"path":"body"}}
diff --git a/rust/lancedb/src/table/computed_columns.rs b/rust/lancedb/src/table/computed_columns.rs
index a70ac31ae..f87d42426 100644
--- a/rust/lancedb/src/table/computed_columns.rs
+++ b/rust/lancedb/src/table/computed_columns.rs
@@ -539,7 +539,13 @@ fn ensure_known_binding_shape(value: &Value) -> Result<()> {
         object
             .get("function")
             .ok_or_else(|| invalid_function("Function binding is missing its exact version"))?,
-        &["name", "version"],
+        &[
+            "name",
+            "object_id",
+            "location",
+            "version",
+            "manifest_digest",
+        ],
         "version reference",
     )?;
     for input in object
@@ -3022,7 +3028,7 @@ mod tests {
     fn named_struct_application(columns: &str) -> FunctionApplication {
         FunctionApplication::from_json(&format!(
             r#"{{
-                "function":{{"name":"text_features","version":"fv_exact"}},
+                "function":{{"name":"text_features","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"}},
                 "inputs":[
                     {{"parameter":"title","kind":"column","value":{{"path":"title"}}}},
                     {{"parameter":"body","kind":"column","value":{{"path":"body"}}}}
@@ -3040,7 +3046,7 @@ mod tests {
     fn blob_application(output: &str) -> FunctionApplication {
         FunctionApplication::from_json(&format!(
             r#"{{
-                "function":{{"name":"blob_features","version":"fv_blob"}},
+                "function":{{"name":"blob_features","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"}},
                 "inputs":[
                     {{"parameter":"image","kind":"column","value":{{"path":"image"}}}}
                 ],
@@ -3059,7 +3065,7 @@ mod tests {
     fn single_input_application(path: &str) -> FunctionApplication {
         FunctionApplication::from_json(
             &serde_json::json!({
-                "function": {"name": "inspect", "version": "fv_nested_blob"},
+                "function": {"name": "inspect", "version": "1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs": [{
                     "parameter": "value",
                     "kind": "column",
@@ -3401,7 +3407,7 @@ mod tests {
         ));
         let dependent_application = FunctionApplication::from_json(
             r#"{
-                "function":{"name":"dependent","version":"fv_dependent"},
+                "function":{"name":"dependent","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[
                     {"parameter":"text","kind":"column","value":{"path":"search_text"}}
                 ],
@@ -3532,7 +3538,7 @@ mod tests {
         let input = ArrowField::new("value", DataType::Int64, false);
         let application = FunctionApplication::from_json(
             &serde_json::json!({
-                "function": {"name": "embed", "version": "fv_embed"},
+                "function": {"name": "embed", "version": "1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs": [{
                     "parameter": "value",
                     "kind": "column",
@@ -3737,7 +3743,7 @@ mod tests {
         ));
         let application = FunctionApplication::from_json(
             &serde_json::json!({
-                "function": {"name": "inspect", "version": "fv_nested_blob"},
+                "function": {"name": "inspect", "version": "1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs": [],
                 "output": {
                     "kind": "named_struct",
@@ -3869,7 +3875,7 @@ mod tests {
     fn test_unknown_and_mixed_version_function_contracts_fail_closed() {
         let application = FunctionApplication::from_json(
             r#"{
-                "function":{"name":"f","version":"fv"},
+                "function":{"name":"f","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[{"parameter":"title","kind":"future_source","value":{"path":"title"}}],
                 "output":{"kind":"scalar","arrow_type":"int64","nullable":false}
             }"#,
@@ -3881,7 +3887,7 @@ mod tests {
 
         let future_application = FunctionApplication::from_json(
             r#"{
-                "function":{"name":"f","version":"fv"},
+                "function":{"name":"f","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[],
                 "output":{"kind":"scalar","arrow_type":"int64","nullable":false},
                 "future_declaration":{"mode":"managed"}
@@ -3895,7 +3901,7 @@ mod tests {
 
         let nested_future_application = FunctionApplication::from_json(
             r#"{
-                "function":{"name":"f","version":"fv"},
+                "function":{"name":"f","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[],
                 "output":{"kind":"scalar","arrow_type":"int64","nullable":false,"assignment":"cell_flag"}
             }"#,
@@ -3961,7 +3967,7 @@ mod tests {
         let nested_schema = ArrowSchema::new(vec![nested_title, schema.field(1).as_ref().clone()]);
         let nested_application = FunctionApplication::from_json(
             r#"{
-                "function":{"name":"text_features","version":"fv_exact"},
+                "function":{"name":"text_features","version":"1","object_id":"fixture","location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
                 "inputs":[
                     {"parameter":"title","kind":"column","value":{"path":"title.value"}},
                     {"parameter":"body","kind":"column","value":{"path":"body"}}
diff --git a/rust/lancedb/tests/first_class_function_slice1.rs b/rust/lancedb/tests/first_class_function_slice1.rs
index c39a0920f..b70ac7f0a 100644
--- a/rust/lancedb/tests/first_class_function_slice1.rs
+++ b/rust/lancedb/tests/first_class_function_slice1.rs
@@ -26,11 +26,8 @@ fn function_version_job_result_matches_shared_canonical_golden() {
     let version = FunctionVersion::from_json(&result.to_string()).expect("FunctionVersion result");
 
     assert_eq!(version.name(), "embed");
-    assert_eq!(
-        version.version(),
-        "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
-    );
-    assert_eq!(version.image().manifest_digest, version.version());
+    assert_eq!(version.version(), "1");
+    assert_ne!(version.image().manifest_digest, version.version());
     assert_eq!(
         version.to_canonical_json().expect("canonical JSON"),
         fixture("remote_function_version.canonical.json").trim()
@@ -48,16 +45,28 @@ fn version_identity_is_immutable_and_exact() {
     assert_eq!(reopened.version(), version.version());
 
     let mut changed = original;
-    changed["version"] = Value::String("fv_01K3DIFFERENT".to_string());
+    changed["version"] = Value::String("2".to_string());
     let changed = FunctionVersion::from_json(&changed.to_string()).expect("changed version");
     assert_ne!(changed, version);
+    assert_eq!(changed.image(), version.image());
+    for invalid in [
+        version.image().manifest_digest.as_str(),
+        "0",
+        "01",
+        "-1",
+        "18446744073709551616",
+    ] {
+        let mut value = serde_json::to_value(&version).unwrap();
+        value["version"] = Value::String(invalid.into());
+        assert!(FunctionVersion::from_json(&value.to_string()).is_err());
+    }
 }
 
 #[test]
 fn application_and_binding_match_shared_remote_goldens() {
     let application = FunctionApplication::from_json(&fixture("remote_function_application.json"))
         .expect("application fixture");
-    assert_eq!(application.function().version, "fv_01K3TEXT");
+    assert_eq!(application.function().version, "1");
     assert_eq!(application.output().kind, "named_struct");
     assert_eq!(application.inputs().len(), 2);
     assert_eq!(
@@ -67,7 +76,7 @@ fn application_and_binding_match_shared_remote_goldens() {
 
     let binding = FunctionBinding::from_json(&fixture("remote_function_binding.json"))
         .expect("binding fixture");
-    assert_eq!(binding.function().version, "fv_01K3TEXT");
+    assert_eq!(binding.function().version, "1");
     assert_eq!(binding.outputs()[0].output_ordinal, 0);
     assert_eq!(binding.outputs()[1].output_ordinal, 1);
     assert!(binding.input_schema().is_some());
diff --git a/rust/lancedb/tests/first_class_function_slice2.rs b/rust/lancedb/tests/first_class_function_slice2.rs
index 6d046d9d1..65924f394 100644
--- a/rust/lancedb/tests/first_class_function_slice2.rs
+++ b/rust/lancedb/tests/first_class_function_slice2.rs
@@ -42,11 +42,11 @@ async fn local_function_catalog_operations_return_stable_not_supported() {
 
     let create_error = connection.create_function_async(request).await.unwrap_err();
     let lookup_error = connection
-        .get_function("normalize_score", "fv_exact")
+        .get_function("normalize_score", "1")
         .await
         .unwrap_err();
     let drop_error = connection
-        .drop_function("normalize_score", "fv_exact")
+        .drop_function("normalize_score", "1")
         .await
         .unwrap_err();
     for error in [create_error, lookup_error, drop_error] {
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json
index 19a5452a6..1c2374fba 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_fixed_size_declaration_request.json
@@ -9,7 +9,7 @@
     "application": {
       "function": {
         "name": "embed",
-        "version": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
+        "version": "1", "object_id": "fixture", "location": "memory:///fixture", "manifest_digest": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"
       },
       "inputs": [
         {
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json
index b91dd1061..8efa681aa 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.canonical.json
@@ -1 +1 @@
-{"columns":{"normalized_text":"search_text","token_count":"search_token_count"},"function":{"name":"text_features","version":"fv_01K3TEXT"},"inputs":[{"kind":"column","parameter":"title","value":{"path":"title"}},{"kind":"column","parameter":"body","value":{"path":"body"}}],"output":{"fields":[{"arrow_type":"utf8","name":"normalized_text","nullable":false},{"arrow_type":"int64","name":"token_count","nullable":false}],"kind":"named_struct"}}
+{"columns":{"normalized_text":"search_text","token_count":"search_token_count"},"function":{"location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6","name":"text_features","object_id":"fixture","version":"1"},"inputs":[{"kind":"column","parameter":"title","value":{"path":"title"}},{"kind":"column","parameter":"body","value":{"path":"body"}}],"output":{"fields":[{"arrow_type":"utf8","name":"normalized_text","nullable":false},{"arrow_type":"int64","name":"token_count","nullable":false}],"kind":"named_struct"}}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json
index 177821aaa..d5b4fd5d8 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application.json
@@ -1,5 +1,5 @@
 {
-  "function": {"name": "text_features", "version": "fv_01K3TEXT"},
+  "function": {"name": "text_features", "version": "1", "object_id": "fixture", "location": "memory:///fixture", "manifest_digest": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
   "inputs": [
     {"parameter": "title", "kind": "column", "value": {"path": "title"}},
     {"parameter": "body", "kind": "column", "value": {"path": "body"}}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json
index c23c8f3ca..98dafcfab 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_application_float.json
@@ -1,5 +1,5 @@
 {
-  "function": {"name": "score", "version": "fv_01K3FLOAT"},
+  "function": {"name": "score", "version": "1", "object_id": "fixture", "location": "memory:///fixture", "manifest_digest": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
   "inputs": [
     {"parameter": "threshold", "kind": "literal", "value": 1e-7}
   ],
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json
index 143190f78..f1355364a 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.canonical.json
@@ -1 +1 @@
-{"binding_id":"fb_01K3TEXT","function":{"name":"text_features","version":"fv_01K3TEXT"},"input_schema":{"fields":[{"name":"title","nullable":true,"type":{"type":"utf8"}},{"name":"body","nullable":true,"type":{"type":"utf8"}}]},"inputs":[{"arrow_type":"utf8","field_id":11,"field_path":"title","nullable":true,"parameter":"title"},{"arrow_type":"utf8","field_id":12,"field_path":"body","nullable":true,"parameter":"body"}],"output_schema":{"fields":[{"name":"search_text","nullable":true,"type":{"type":"utf8"}},{"name":"search_token_count","nullable":true,"type":{"type":"int64"}}]},"outputs":[{"arrow_type":"utf8","nullable":false,"output_field_id":21,"output_name":"search_text","output_ordinal":0,"result_field":"normalized_text"},{"arrow_type":"int64","nullable":false,"output_field_id":22,"output_name":"search_token_count","output_ordinal":1,"result_field":"token_count"}]}
+{"binding_id":"fb_01K3TEXT","function":{"location":"memory:///fixture","manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6","name":"text_features","object_id":"fixture","version":"1"},"input_schema":{"fields":[{"name":"title","nullable":true,"type":{"type":"utf8"}},{"name":"body","nullable":true,"type":{"type":"utf8"}}]},"inputs":[{"arrow_type":"utf8","field_id":11,"field_path":"title","nullable":true,"parameter":"title"},{"arrow_type":"utf8","field_id":12,"field_path":"body","nullable":true,"parameter":"body"}],"output_schema":{"fields":[{"name":"search_text","nullable":true,"type":{"type":"utf8"}},{"name":"search_token_count","nullable":true,"type":{"type":"int64"}}]},"outputs":[{"arrow_type":"utf8","nullable":false,"output_field_id":21,"output_name":"search_text","output_ordinal":0,"result_field":"normalized_text"},{"arrow_type":"int64","nullable":false,"output_field_id":22,"output_name":"search_token_count","output_ordinal":1,"result_field":"token_count"}]}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json
index dec3fa3f8..ae1666544 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_binding.json
@@ -1,6 +1,6 @@
 {
   "binding_id": "fb_01K3TEXT",
-  "function": {"name": "text_features", "version": "fv_01K3TEXT"},
+  "function": {"name": "text_features", "version": "1", "object_id": "fixture", "location": "memory:///fixture", "manifest_digest": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
   "inputs": [
     {"parameter": "title", "field_id": 11, "field_path": "title", "arrow_type": "utf8", "nullable": true},
     {"parameter": "body", "field_id": 12, "field_path": "body", "arrow_type": "utf8", "nullable": true}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_job.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_job.json
index 49e7ef61b..3381fd266 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_job.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_job.json
@@ -8,7 +8,7 @@
   },
   "result": {
     "name": "embed",
-    "version": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6",
+    "version": "1", "object_id": "fixture", "location": "memory:///fixture", "metadata": {}, "disabled": false,
     "signature": {
       "inputs": [
         {
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_version.canonical.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_version.canonical.json
index a7a2be434..3f0c11973 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_version.canonical.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_function_version.canonical.json
@@ -1 +1 @@
-{"created_at":"2026-08-21T00:00:00Z","image":{"descriptor":{"behavior":{"result_stability":"input_and_context","side_effects":"non_idempotent"},"entrypoint":"app.function:create","format_version":1,"interface":{"type":"lance.scalar","version":1},"python":{"abi_tag":"cp312","executable":"/usr/local/bin/python3","implementation":"cpython","import_paths":["/opt/function/code"],"version":"3.12.14"},"python_api":1,"requires":{"capabilities":[],"kernel_min":"4.18.0"},"schemas":{"initialization":"/opt/function/schemas/initialization.arrow","input":"/opt/function/schemas/input.arrow","output":"/opt/function/schemas/output.arrow"}},"manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6","source":false},"name":"embed","signature":{"inputs":[{"arrow_type":"utf8","name":"text","nullable":true}],"output":{"arrow_type":"list<float32>","kind":"scalar","nullable":false}},"version":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"}
+{"created_at":"2026-08-21T00:00:00Z","disabled":false,"image":{"descriptor":{"behavior":{"result_stability":"input_and_context","side_effects":"non_idempotent"},"entrypoint":"app.function:create","format_version":1,"interface":{"type":"lance.scalar","version":1},"python":{"abi_tag":"cp312","executable":"/usr/local/bin/python3","implementation":"cpython","import_paths":["/opt/function/code"],"version":"3.12.14"},"python_api":1,"requires":{"capabilities":[],"kernel_min":"4.18.0"},"schemas":{"initialization":"/opt/function/schemas/initialization.arrow","input":"/opt/function/schemas/input.arrow","output":"/opt/function/schemas/output.arrow"}},"manifest_digest":"sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6","source":false},"location":"memory:///fixture","metadata":{},"name":"embed","object_id":"fixture","signature":{"inputs":[{"arrow_type":"utf8","name":"text","nullable":true}],"output":{"arrow_type":"list<float32>","kind":"scalar","nullable":false}},"version":"1"}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json
index c4ef5009f..02b2d5880 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_multi_output_declaration_request.json
@@ -5,7 +5,7 @@
   ],
   "function": {
     "application": {
-      "function": {"name": "text_features", "version": "fv_01K3TEXT"},
+      "function": {"name": "text_features", "version": "1", "object_id": "fixture", "location": "memory:///fixture", "manifest_digest": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
       "inputs": [
         {"parameter": "title", "kind": "column", "value": {"path": "title"}},
         {"parameter": "body", "kind": "column", "value": {"path": "body"}}
diff --git a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json
index a983a3c3d..30fe06b91 100644
--- a/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json
+++ b/rust/lancedb/tests/fixtures/first_class_functions/v1/remote_scalar_declaration_request.json
@@ -4,7 +4,7 @@
   ],
   "function": {
     "application": {
-      "function": {"name": "embed", "version": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
+      "function": {"name": "embed", "version": "1", "object_id": "fixture", "location": "memory:///fixture", "manifest_digest": "sha256:7e22f815b6648e14f093a3979a8e5a2082fa773ebe1ec84b135cae7e84d6f8e6"},
       "inputs": [
         {"parameter": "text", "kind": "column", "value": {"path": "description"}}
       ],