diff --git a/community/lexicon/preference/README.md b/community/lexicon/preference/README.md
new file mode 100644
index 0000000..4501bec
--- /dev/null
+++ b/community/lexicon/preference/README.md
@@ -0,0 +1,120 @@
+# community.lexicon.preference
+
+Lexicon schemas for user preferences on ATProtocol. These schemas allow users to declare how their public data may be used by external consumers.
+
+## Schemas
+
+### `community.lexicon.preference.ai`
+
+Declares a user's preferences regarding AI usage of their public data. Decomposes AI usage into four distinct categories including training, inference, synthetic content generation, and embedding, each with independent allow/deny controls.
+
+#### Record keys
+
+- **`self`**: The account-wide default policy, scoped with `globalScope`.
+- **TID**: Scoped overrides that target specific entities (by DID or domain) or specific collections (by NSID).
+
+#### Preference categories
+
+- **training**: Use of data as input for training, fine-tuning, distillation, or RLHF of ML models.
+- **inference**: Use of data at inference time for retrieval, RAG, or context injection.
+- **syntheticContent**: Use of data to generate synthetic content or interactions derived from user data.
+- **embedding**: Use of data for vector embeddings or semantic indexing.
+
+Each preference is tri-state: `allow: true` (permitted), `allow: false` (denied), or omitted (undefined / no declared preference).
+
+#### Scoping
+
+Every record declares a `scope` that determines what it applies to:
+
+- **globalScope**: Account-wide default. Used by the record at key `self`.
+- **entityScope**: Targets a specific AI consumer identified by DID or domain.
+- **collectionScope**: Targets a specific NSID in the user's repository.
+
+Overrides are additive — an override that only declares `training` inherits the global record's stance on all other categories. If the global default also omits a preference, the result is undefined and the consumer applies their own policy.
+
+#### Consumer resolution order
+
+1. Check for an entity-scoped override matching the consumer's DID or domain.
+2. Check for a collection-scoped override matching the content's NSID.
+3. Fall back to the global default at key `self`.
+
+#### Example: global default
+
+```json
+{
+  "$type": "community.lexicon.preference.ai",
+  "updatedAt": "2026-04-04T12:00:00.000Z",
+  "scope": {
+    "$type": "#globalScope"
+  },
+  "preferences": {
+    "training": {
+      "allow": false,
+      "updatedAt": "2026-04-04T12:00:00.000Z"
+    },
+    "inference": {
+      "allow": true,
+      "updatedAt": "2026-04-04T12:00:00.000Z"
+    },
+    "syntheticContent": {
+      "allow": false,
+      "updatedAt": "2026-04-04T12:00:00.000Z"
+    }
+  }
+}
+```
+
+#### Example: entity override
+
+```json
+{
+  "$type": "community.lexicon.preference.ai",
+  "updatedAt": "2026-04-04T13:00:00.000Z",
+  "scope": {
+    "$type": "#entityScope",
+    "entity": "did:plc:example-ai-company"
+  },
+  "preferences": {
+    "training": {
+      "allow": true,
+      "updatedAt": "2026-04-04T13:00:00.000Z"
+    }
+  }
+}
+```
+
+#### Example: collection override
+
+```json
+{
+  "$type": "community.lexicon.preference.ai",
+  "updatedAt": "2026-04-04T14:00:00.000Z",
+  "scope": {
+    "$type": "#collectionScope",
+    "collection": "app.bsky.feed.post"
+  },
+  "preferences": {
+    "training": {
+      "allow": false,
+      "updatedAt": "2026-04-04T14:00:00.000Z"
+    },
+    "inference": {
+      "allow": false,
+      "updatedAt": "2026-04-04T14:00:00.000Z"
+    },
+    "syntheticContent": {
+      "allow": false,
+      "updatedAt": "2026-04-04T14:00:00.000Z"
+    },
+    "embedding": {
+      "allow": false,
+      "updatedAt": "2026-04-04T14:00:00.000Z"
+    }
+  }
+}
+```
+
+## Related work
+
+- [Bluesky Proposal 0008: User Intents for Data Reuse](https://github.com/bluesky-social/proposals/blob/main/0008-user-intents/README.md)
+- [IETF AI Preferences working group](https://datatracker.ietf.org/group/aipref/about/)
diff --git a/community/lexicon/preference/ai.json b/community/lexicon/preference/ai.json
new file mode 100644
index 0000000..bb87ee6
--- /dev/null
+++ b/community/lexicon/preference/ai.json
@@ -0,0 +1,99 @@
+{
+  "lexicon": 1,
+  "id": "community.lexicon.preference.ai",
+  "description": "Declares a user's preferences regarding AI usage of their public data. A record at key 'self' with globalScope establishes default preferences. Additional records keyed by TID establish scoped overrides for specific entities or content collections.",
+  "defs": {
+    "main": {
+      "type": "record",
+      "key": "any",
+      "record": {
+        "type": "object",
+        "required": ["updatedAt", "scope", "preferences"],
+        "properties": {
+          "updatedAt": {
+            "type": "string",
+            "format": "datetime",
+            "description": "Timestamp of the most recent change to this record."
+          },
+          "scope": {
+            "type": "union",
+            "description": "What this record's preferences apply to.",
+            "refs": ["#globalScope", "#entityScope", "#collectionScope"]
+          },
+          "preferences": {
+            "type": "ref",
+            "ref": "#preferenceSet"
+          }
+        }
+      }
+    },
+    "preferenceSet": {
+      "type": "object",
+      "description": "A set of AI usage preferences. Omitted fields mean undefined (no declared preference).",
+      "properties": {
+        "training": {
+          "type": "ref",
+          "ref": "#preference",
+          "description": "Use as input for training, fine-tuning, distillation, or RLHF of ML models."
+        },
+        "inference": {
+          "type": "ref",
+          "ref": "#preference",
+          "description": "Use at inference time for retrieval, RAG, or context injection."
+        },
+        "syntheticContent": {
+          "type": "ref",
+          "ref": "#preference",
+          "description": "Use to generate synthetic content or interactions derived from user data."
+        },
+        "embedding": {
+          "type": "ref",
+          "ref": "#preference",
+          "description": "Use for vector embeddings or semantic indexing."
+        }
+      }
+    },
+    "preference": {
+      "type": "object",
+      "required": ["allow", "updatedAt"],
+      "properties": {
+        "allow": {
+          "type": "boolean",
+          "description": "Whether this usage is permitted (true) or denied (false)."
+        },
+        "updatedAt": {
+          "type": "string",
+          "format": "datetime",
+          "description": "When this specific preference was last changed."
+        }
+      }
+    },
+    "globalScope": {
+      "type": "object",
+      "description": "Account-wide default. The record at key 'self' should carry this scope."
+    },
+    "entityScope": {
+      "type": "object",
+      "description": "Scopes preferences to a specific AI consumer.",
+      "required": ["entity"],
+      "properties": {
+        "entity": {
+          "type": "string",
+          "description": "DID or domain of the entity this override applies to."
+        }
+      }
+    },
+    "collectionScope": {
+      "type": "object",
+      "description": "Scopes preferences to a specific record collection in the user's repository.",
+      "required": ["collection"],
+      "properties": {
+        "collection": {
+          "type": "string",
+          "format": "nsid",
+          "description": "NSID of the collection this override applies to."
+        }
+      }
+    }
+  }
+}