diff --git a/fixtures/database.json b/fixtures/database.json
index 7b49053..823f6d3 100644
--- a/fixtures/database.json
+++ b/fixtures/database.json
@@ -651,16 +651,21 @@
         "action": "compile",
         "expect": {
           "success": true,
-          "schemas": [
-            "full.contact",
-            "full.person",
-            "full.person/ad_hoc_bubble",
-            "full.person/extended_relations",
-            "full.person/extended_relations/target",
-            "light.email_address",
-            "some_bubble",
-            "student.person"
-          ]
+          "schemas": {
+            "full.contact": {},
+            "full.contact.filter": {},
+            "full.person": {},
+            "full.person.filter": {},
+            "full.person/ad_hoc_bubble": {},
+            "full.person/extended_relations": {},
+            "full.person/extended_relations/target": {},
+            "light.email_address": {},
+            "light.email_address.filter": {},
+            "some_bubble": {},
+            "some_bubble.filter": {},
+            "student.person": {},
+            "student.person.filter": {}
+          }
         }
       }
     ]
@@ -919,11 +924,14 @@
         "action": "compile",
         "expect": {
           "success": true,
-          "schemas": [
-            "entity",
-            "invoice",
-            "invoice_line"
-          ]
+          "schemas": {
+            "entity": {},
+            "entity.filter": {},
+            "invoice": {},
+            "invoice.filter": {},
+            "invoice_line": {},
+            "invoice_line.filter": {}
+          }
         }
       }
     ]
diff --git a/fixtures/filter.json b/fixtures/filter.json
new file mode 100644
index 0000000..11f5d5d
--- /dev/null
+++ b/fixtures/filter.json
@@ -0,0 +1,222 @@
+[
+  {
+    "description": "Filter Synthesis Object-Oriented Composition",
+    "database": {
+      "puncs": [],
+      "enums": [],
+      "relations": [
+        {
+          "id": "rel1",
+          "type": "relation",
+          "constraint": "fk_person_billing_address",
+          "source_type": "person",
+          "source_columns": [
+            "billing_address_id"
+          ],
+          "destination_type": "address",
+          "destination_columns": [
+            "id"
+          ],
+          "prefix": "billing_address"
+        }
+      ],
+      "types": [
+        {
+          "id": "type1",
+          "type": "type",
+          "name": "person",
+          "module": "core",
+          "source": "person",
+          "hierarchy": [
+            "person"
+          ],
+          "variations": [
+            "person"
+          ],
+          "schemas": {
+            "person": {
+              "type": "object",
+              "properties": {
+                "first_name": {
+                  "type": "string"
+                },
+                "age": {
+                  "type": "integer"
+                },
+                "billing_address": {
+                  "type": "address"
+                },
+                "birth_date": {
+                  "type": "string",
+                  "format": "date-time"
+                },
+                "tags": {
+                  "type": "array",
+                  "items": {
+                    "type": "string"
+                  }
+                },
+                "ad_hoc": {
+                  "type": "object",
+                  "properties": {
+                    "foo": {
+                      "type": "string"
+                    }
+                  }
+                }
+              }
+            }
+          }
+        },
+        {
+          "id": "type2",
+          "type": "type",
+          "name": "address",
+          "module": "core",
+          "source": "address",
+          "hierarchy": [
+            "address"
+          ],
+          "variations": [
+            "address"
+          ],
+          "schemas": {
+            "address": {
+              "type": "object",
+              "properties": {
+                "city": {
+                  "type": "string"
+                }
+              }
+            }
+          }
+        },
+        {
+          "id": "type3",
+          "type": "type",
+          "name": "filter",
+          "module": "core",
+          "source": "filter",
+          "hierarchy": [
+            "filter"
+          ],
+          "variations": [
+            "filter",
+            "string.condition",
+            "integer.condition",
+            "date.condition"
+          ],
+          "schemas": {
+            "condition": {
+              "type": "object",
+              "properties": {
+                "kind": {
+                  "type": "string"
+                }
+              }
+            },
+            "string.condition": {
+              "type": "condition",
+              "properties": {
+                "$eq": {
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                }
+              }
+            },
+            "integer.condition": {
+              "type": "condition",
+              "properties": {
+                "$eq": {
+                  "type": [
+                    "integer",
+                    "null"
+                  ]
+                }
+              }
+            },
+            "date.condition": {
+              "type": "condition",
+              "properties": {
+                "$eq": {
+                  "type": [
+                    "string",
+                    "null"
+                  ]
+                }
+              }
+            }
+          }
+        }
+      ]
+    },
+    "tests": [
+      {
+        "description": "Assert filter generation map accurately represents strongly typed conditions natively.",
+        "action": "compile",
+        "expect": {
+          "success": true,
+          "schemas": {
+            "person": {},
+            "person.filter": {
+              "type": "object",
+              "compiledPropertyNames": [
+                "age",
+                "billing_address",
+                "birth_date",
+                "first_name"
+              ],
+              "properties": {
+                "first_name": {
+                  "type": [
+                    "string.condition",
+                    "null"
+                  ]
+                },
+                "age": {
+                  "type": [
+                    "integer.condition",
+                    "null"
+                  ]
+                },
+                "billing_address": {
+                  "type": [
+                    "address.filter",
+                    "null"
+                  ]
+                },
+                "birth_date": {
+                  "type": [
+                    "date.condition",
+                    "null"
+                  ]
+                }
+              }
+            },
+            "address": {},
+            "address.filter": {
+              "type": "object",
+              "compiledPropertyNames": [
+                "city"
+              ],
+              "properties": {
+                "city": {
+                  "type": [
+                    "string.condition",
+                    "null"
+                  ]
+                }
+              }
+            },
+            "condition": {},
+            "string.condition": {},
+            "integer.condition": {},
+            "date.condition": {}
+          }
+        }
+      }
+    ]
+  }
+]
\ No newline at end of file
diff --git a/src/database/compile/filters.rs b/src/database/compile/filters.rs
new file mode 100644
index 0000000..5a38c85
--- /dev/null
+++ b/src/database/compile/filters.rs
@@ -0,0 +1,78 @@
+use crate::database::object::{SchemaObject, SchemaTypeOrArray};
+use crate::database::schema::Schema;
+use crate::database::Database;
+use std::collections::BTreeMap;
+use std::sync::Arc;
+
+impl Schema {
+  pub fn compile_filter(
+    &self,
+    _db: &Database,
+    _root_id: &str,
+    _errors: &mut Vec<crate::drop::Error>,
+  ) -> Option<Schema> {
+    if let Some(props) = self.obj.compiled_properties.get() {
+      let mut filter_props = BTreeMap::new();
+      for (key, child) in props {
+        if let Some(mut filter_type) = Self::resolve_filter_type(child) {
+          filter_type.push("null".to_string());
+
+          let mut child_obj = SchemaObject::default();
+          child_obj.type_ = Some(SchemaTypeOrArray::Multiple(filter_type));
+
+          filter_props.insert(key.clone(), Arc::new(Schema { obj: child_obj, always_fail: false }));
+        }
+      }
+
+      if !filter_props.is_empty() {
+        let mut wrapper_obj = SchemaObject::default();
+        wrapper_obj.type_ = Some(SchemaTypeOrArray::Single("object".to_string()));
+        wrapper_obj.properties = Some(filter_props);
+
+        return Some(Schema { obj: wrapper_obj, always_fail: false });
+      }
+    }
+    None
+  }
+
+  fn resolve_filter_type(schema: &Arc<Schema>) -> Option<Vec<String>> {
+    if let Some(type_) = &schema.obj.type_ {
+      match type_ {
+        SchemaTypeOrArray::Single(t) => {
+          return Self::map_filter_string(t, schema);
+        }
+        SchemaTypeOrArray::Multiple(types) => {
+          for t in types {
+            if t != "null" {
+              return Self::map_filter_string(t, schema);
+            }
+          }
+        }
+      }
+    }
+    None
+  }
+
+  fn map_filter_string(t: &str, schema: &Arc<Schema>) -> Option<Vec<String>> {
+    match t {
+      "string" => {
+        if let Some(fmt) = &schema.obj.format {
+          if fmt == "date-time" {
+            return Some(vec!["date.condition".to_string()]);
+          }
+        }
+        Some(vec!["string.condition".to_string()])
+      }
+      "integer" => Some(vec!["integer.condition".to_string()]),
+      "number" => Some(vec!["number.condition".to_string()]),
+      "boolean" => Some(vec!["boolean.condition".to_string()]),
+      "object" => None, // Inline structures are ignored in Composed References
+      "array" => None,  // We don't filter primitive arrays or map complex arrays yet
+      "null" => None,
+      custom => {
+        // Assume anything else is a Relational cross-boundary that already has its own .filter dynamically built
+        Some(vec![format!("{}.filter", custom)])
+      }
+    }
+  }
+}
diff --git a/src/database/compile/mod.rs b/src/database/compile/mod.rs
index a3661c0..d54fc0f 100644
--- a/src/database/compile/mod.rs
+++ b/src/database/compile/mod.rs
@@ -1,5 +1,6 @@
 pub mod collection;
 pub mod edges;
+pub mod filters;
 pub mod polymorphism;
 
 use crate::database::schema::Schema;
diff --git a/src/database/mod.rs b/src/database/mod.rs
index 9ee7de4..0696433 100644
--- a/src/database/mod.rs
+++ b/src/database/mod.rs
@@ -1,3 +1,4 @@
+pub mod compile;
 pub mod edge;
 pub mod r#enum;
 pub mod executors;
@@ -8,7 +9,6 @@ pub mod punc;
 pub mod relation;
 pub mod schema;
 pub mod r#type;
-pub mod compile;
 
 // External mock exports inside the executor sub-folder
 
@@ -210,6 +210,7 @@ impl Database {
   }
 
   pub fn compile(&mut self, errors: &mut Vec<crate::drop::Error>) {
+    // Collect existing schemas patched in the databse
     let mut harvested = Vec::new();
     for (id, schema_arc) in &self.schemas {
       crate::database::schema::Schema::collect_schemas(
@@ -234,6 +235,37 @@ impl Database {
         .as_ref()
         .compile(self, root_id, id.clone(), errors);
     }
+
+    // Phase 2: Synthesize Composed Filter References
+    let mut filter_schemas = Vec::new();
+    for type_def in self.types.values() {
+      for (id, schema_arc) in &type_def.schemas {
+        // Only run synthesis on actual structured, table-backed boundaries. Exclude subschemas!
+        let base_name = id.split('.').last().unwrap_or(id);
+        let is_table_backed = base_name == type_def.name;
+        if is_table_backed && !id.contains('/') {
+          if let Some(filter_schema) = schema_arc.compile_filter(self, id, errors) {
+            filter_schemas.push((format!("{}.filter", id), Arc::new(filter_schema)));
+          }
+        }
+      }
+    }
+
+    let mut filter_ids = Vec::new();
+    for (id, filter_arc) in filter_schemas {
+      filter_ids.push(id.clone());
+      self.schemas.insert(id, filter_arc);
+    }
+
+    // Now actively compile the newly injected filters to lock all nested compose references natively
+    for id in filter_ids {
+      if let Some(filter_arc) = self.schemas.get(&id).cloned() {
+        let root_id = id.split('/').next().unwrap_or(&id);
+        filter_arc
+          .as_ref()
+          .compile(self, root_id, id.clone(), errors);
+      }
+    }
   }
 
   fn collect_schemas(&mut self, errors: &mut Vec<crate::drop::Error>) {
diff --git a/src/tests/fixtures.rs b/src/tests/fixtures.rs
index 727f2c6..8899f3c 100644
--- a/src/tests/fixtures.rs
+++ b/src/tests/fixtures.rs
@@ -533,6 +533,12 @@ fn test_unique_items_6_1() {
     crate::tests::runner::run_test_case(&path, 6, 1).unwrap();
 }
 
+#[test]
+fn test_filter_0_0() {
+    let path = format!("{}/fixtures/filter.json", env!("CARGO_MANIFEST_DIR"));
+    crate::tests::runner::run_test_case(&path, 0, 0).unwrap();
+}
+
 #[test]
 fn test_min_items_0_0() {
     let path = format!("{}/fixtures/minItems.json", env!("CARGO_MANIFEST_DIR"));
diff --git a/src/tests/mod.rs b/src/tests/mod.rs
index 58499cb..d911e2c 100644
--- a/src/tests/mod.rs
+++ b/src/tests/mod.rs
@@ -107,12 +107,28 @@ fn test_library_api() {
                     }
                 }
             },
+            "source_schema.filter": {
+                "type": "object",
+                "properties": {
+                    "type": { "type": ["string.condition", "null"] },
+                    "name": { "type": ["string.condition", "null"] },
+                    "target": { "type": ["target_schema.filter", "null"] }
+                },
+                "compiledPropertyNames": ["name", "target", "type"]
+            },
             "target_schema": {
                 "type": "object",
                 "properties": {
                     "value": { "type": "number" }
                 },
                 "compiledPropertyNames": ["value"]
+            },
+            "target_schema.filter": {
+                "type": "object",
+                "properties": {
+                    "value": { "type": ["number.condition", "null"] }
+                },
+                "compiledPropertyNames": ["value"]
             }
         }
     })
diff --git a/src/tests/types/expect/mod.rs b/src/tests/types/expect/mod.rs
index 744e43a..c093a49 100644
--- a/src/tests/types/expect/mod.rs
+++ b/src/tests/types/expect/mod.rs
@@ -20,5 +20,5 @@ pub struct Expect {
   #[serde(default)]
   pub sql: Option<Vec<SqlExpectation>>,
   #[serde(default)]
-  pub schemas: Option<Vec<String>>,
+  pub schemas: Option<std::collections::HashMap<String, serde_json::Value>>,
 }
diff --git a/src/tests/types/expect/schema.rs b/src/tests/types/expect/schema.rs
index 807c17d..1e74183 100644
--- a/src/tests/types/expect/schema.rs
+++ b/src/tests/types/expect/schema.rs
@@ -3,13 +3,13 @@ use std::sync::Arc;
 
 impl Expect {
   pub fn assert_schemas(&self, db: &Arc<crate::database::Database>) -> Result<(), String> {
-    if let Some(expected_schemas) = &self.schemas {
+    if let Some(expected_map) = &self.schemas {
       // Collect actual schemas and sort
       let mut actual: Vec<String> = db.schemas.keys().cloned().collect();
       actual.sort();
 
       // Collect expected schemas and sort
-      let mut expected: Vec<String> = expected_schemas.clone();
+      let mut expected: Vec<String> = expected_map.keys().cloned().collect();
       expected.sort();
 
       if actual != expected {
@@ -21,6 +21,23 @@ impl Expect {
           actual
         ));
       }
+
+      for (key, expected_val) in expected_map {
+         if expected_val.is_object() && expected_val.as_object().unwrap().is_empty() {
+            continue; // A `{}` means we just wanted to test it was collected/promoted, skip deep match
+         }
+         let actual_ast = db.schemas.get(key).unwrap();
+         let actual_val = serde_json::to_value(actual_ast).unwrap();
+         
+         if actual_val != *expected_val {
+            return Err(format!(
+              "Detailed Schema Match Failure for '{}'!\n\nExpected:\n{}\n\nActual:\n{}",
+              key,
+              serde_json::to_string_pretty(expected_val).unwrap(),
+              serde_json::to_string_pretty(&actual_val).unwrap()
+            ));
+         }
+      }
     }
     Ok(())
   }