diff --git a/lexicons/org/tangled/cob/attestation.json b/lexicons/org/tangled/cob/attestation.json
new file mode 100644
index 000000000..0c2e73cd3
--- /dev/null
+++ b/lexicons/org/tangled/cob/attestation.json
@@ -0,0 +1,20 @@
+{
+  "lexicon": 1,
+  "id": "org.tangled.cob.attestation",
+  "defs": {
+    "main": {
+      "type": "record",
+      "key": "tid",
+      "record": {
+        "type": "object",
+        "required": ["record"],
+        "properties": {
+          "record": {
+            "type": "ref",
+            "ref": "com.atproto.repo.strongRef"
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/lexicons/org/tangled/git/object.json b/lexicons/org/tangled/git/object.json
new file mode 100644
index 000000000..775b0bf4f
--- /dev/null
+++ b/lexicons/org/tangled/git/object.json
@@ -0,0 +1,25 @@
+{
+  "lexicon": 1,
+  "id": "org.tangled.git.object",
+  "description": "Git object reference similar to concrete `blob` type. This is not same as 'git reference'.",
+  "defs": {
+    "main": {
+      "type": "object",
+      "required": ["oid", "kind", "size"],
+      "properties": {
+        "oid": {
+          "type": "string",
+          "minLength": 64,
+          "maxLength": 64
+        },
+        "kind": {
+          "type": "string",
+          "enum": ["blob", "commit", "tag", "tree"]
+        },
+        "size": {
+          "type": "integer"
+        }
+      }
+    }
+  }
+}
diff --git a/lexicons/org/tangled/git/receivePack.json b/lexicons/org/tangled/git/receivePack.json
new file mode 100644
index 000000000..e072834e1
--- /dev/null
+++ b/lexicons/org/tangled/git/receivePack.json
@@ -0,0 +1,10 @@
+{
+  "lexicon": 1,
+  "id": "org.tangled.git.receivePack",
+  "defs": {
+    "main": {
+      "type": "procedure",
+      "description": "No-op xrpc endpoint for `git-push` permission scope."
+    }
+  }
+}
diff --git a/lexicons/org/tangled/git/refs.json b/lexicons/org/tangled/git/refs.json
new file mode 100644
index 000000000..601fe49ce
--- /dev/null
+++ b/lexicons/org/tangled/git/refs.json
@@ -0,0 +1,28 @@
+{
+  "lexicon": 1,
+  "id": "org.tangled.git.refs",
+  "defs": {
+    "main": {
+      "type": "record",
+      "key": "literal:self",
+      "record": {
+        "type": "object",
+        "required": [
+          "digest",
+          "blocks"
+        ],
+        "properties": {
+          "digest": {
+            "type": "string",
+            "description": "Digest hash of the git repository.\nNOTE: we might want to split this by refs/heads, refs/tags, refs/tngl/keep and so on."
+          },
+          "blocks": {
+            "type": "bytes",
+            "description": "List of git refs in `git show-ref` format.",
+            "maxLength": 1000000
+          }
+        }
+      }
+    }
+  }
+}