diff --git a/lexicons/embed/commit.json b/lexicons/embed/commit.json
new file mode 100644
index 000000000..ace51b8a9
--- /dev/null
+++ b/lexicons/embed/commit.json
@@ -0,0 +1,17 @@
+{
+  "lexicon": 1,
+  "id": "sh.tangled.embed.commit",
+  "defs": {
+    "main": {
+      "type": "object",
+      "required": [
+        "repo",
+        "commit"
+      ],
+      "properties": {
+        "repo": { "type": "string", "format": "did" },
+        "commit": { "type": "union", "refs": ["sh.tangled.git.oid"] }
+      }
+    }
+  }
+}
diff --git a/lexicons/feed/comment.json b/lexicons/feed/comment.json
index 8af9e31e4..5439e80bb 100644
--- a/lexicons/feed/comment.json
+++ b/lexicons/feed/comment.json
@@ -31,6 +31,12 @@
             "type": "ref",
             "ref": "com.atproto.repo.strongRef"
           },
+          "embed": {
+            "type": "union",
+            "refs": [
+              "sh.tangled.embed.commit"
+            ]
+          },
           "pullRoundIdx": {
             "type": "integer",
             "minimum": 0,
diff --git a/lexicons/git/oid.json b/lexicons/git/oid.json
new file mode 100644
index 000000000..19f14dece
--- /dev/null
+++ b/lexicons/git/oid.json
@@ -0,0 +1,17 @@
+{
+  "lexicon": 1,
+  "id": "sh.tangled.git.oid",
+  "defs": {
+    "main": {
+      "type": "object",
+      "required": ["oid"],
+      "properties": {
+        "oid": {
+          "type": "string",
+          "minLength": 40,
+          "maxLength": 128
+        }
+      }
+    }
+  }
+}
diff --git a/web/lex.config.ts b/web/lex.config.ts
index 07045d357..cd2ecf815 100644
--- a/web/lex.config.ts
+++ b/web/lex.config.ts
@@ -12,6 +12,7 @@ export default defineLexiconConfig({
 			"../lexicons/bobbin/**/*.json",
 			"../lexicons/actor/**/*.json",
 			"../lexicons/ci/**/*.json",
+			"../lexicons/embed/**/*.json",
 			"../lexicons/feed/**/*.json",
 			"../lexicons/git/**/*.json",
 			"../lexicons/graph/**/*.json",
diff --git a/web/src/lib/api/lexicons/index.ts b/web/src/lib/api/lexicons/index.ts
index bbdcaddc5..b9a586bb2 100644
--- a/web/src/lib/api/lexicons/index.ts
+++ b/web/src/lib/api/lexicons/index.ts
@@ -12,6 +12,7 @@ export * as ShTangledCiQueryPipelines from "./types/sh/tangled/ci/queryPipelines
 export * as ShTangledCiSubscribePipelineLogs from "./types/sh/tangled/ci/subscribePipelineLogs.js";
 export * as ShTangledCiTrigger from "./types/sh/tangled/ci/trigger.js";
 export * as ShTangledCiTriggerPipeline from "./types/sh/tangled/ci/triggerPipeline.js";
+export * as ShTangledEmbedCommit from "./types/sh/tangled/embed/commit.js";
 export * as ShTangledFeedComment from "./types/sh/tangled/feed/comment.js";
 export * as ShTangledFeedCountComments from "./types/sh/tangled/feed/countComments.js";
 export * as ShTangledFeedCountCommentsBy from "./types/sh/tangled/feed/countCommentsBy.js";
@@ -38,6 +39,7 @@ export * as ShTangledGitListRefUpdatesBy from "./types/sh/tangled/git/listRefUpd
 export * as ShTangledGitListRefs from "./types/sh/tangled/git/listRefs.js";
 export * as ShTangledGitMergeCheck from "./types/sh/tangled/git/mergeCheck.js";
 export * as ShTangledGitMergeCommit from "./types/sh/tangled/git/mergeCommit.js";
+export * as ShTangledGitOid from "./types/sh/tangled/git/oid.js";
 export * as ShTangledGitRefUpdate from "./types/sh/tangled/git/refUpdate.js";
 export * as ShTangledGitTempAnalyzeMerge from "./types/sh/tangled/git/temp/analyzeMerge.js";
 export * as ShTangledGitTempDefs from "./types/sh/tangled/git/temp/defs.js";
diff --git a/web/src/lib/api/lexicons/types/sh/tangled/embed/commit.ts b/web/src/lib/api/lexicons/types/sh/tangled/embed/commit.ts
new file mode 100644
index 000000000..a62564cd6
--- /dev/null
+++ b/web/src/lib/api/lexicons/types/sh/tangled/embed/commit.ts
@@ -0,0 +1,21 @@
+import type {} from "@atcute/lexicons";
+import * as v from "@atcute/lexicons/validations";
+import * as ShTangledGitOid from "../git/oid.js";
+
+const _mainSchema = /*#__PURE__*/ v.object({
+  $type: /*#__PURE__*/ v.optional(
+    /*#__PURE__*/ v.literal("sh.tangled.embed.commit"),
+  ),
+  get commit() {
+    return /*#__PURE__*/ v.variant([ShTangledGitOid.mainSchema]);
+  },
+  repo: /*#__PURE__*/ v.didString(),
+});
+
+type main$schematype = typeof _mainSchema;
+
+export interface mainSchema extends main$schematype {}
+
+export const mainSchema = _mainSchema as mainSchema;
+
+export interface Main extends v.InferInput<typeof mainSchema> {}
diff --git a/web/src/lib/api/lexicons/types/sh/tangled/feed/comment.ts b/web/src/lib/api/lexicons/types/sh/tangled/feed/comment.ts
index adf15ad78..d55717ace 100644
--- a/web/src/lib/api/lexicons/types/sh/tangled/feed/comment.ts
+++ b/web/src/lib/api/lexicons/types/sh/tangled/feed/comment.ts
@@ -2,6 +2,7 @@ import type {} from "@atcute/lexicons";
 import * as v from "@atcute/lexicons/validations";
 import type {} from "@atcute/lexicons/ambient";
 import * as ComAtprotoRepoStrongRef from "@atcute/atproto/types/repo/strongRef";
+import * as ShTangledEmbedCommit from "../embed/commit.js";
 import * as ShTangledMarkupMarkdown from "../markup/markdown.js";
 
 const _mainSchema = /*#__PURE__*/ v.record(
@@ -12,6 +13,11 @@ const _mainSchema = /*#__PURE__*/ v.record(
       return /*#__PURE__*/ v.variant([ShTangledMarkupMarkdown.mainSchema]);
     },
     createdAt: /*#__PURE__*/ v.datetimeString(),
+    get embed() {
+      return /*#__PURE__*/ v.optional(
+        /*#__PURE__*/ v.variant([ShTangledEmbedCommit.mainSchema]),
+      );
+    },
     /**
      * optional pull submission round index. required when subject is sh.tangled.repo.pull
      * @minimum 0
diff --git a/web/src/lib/api/lexicons/types/sh/tangled/git/oid.ts b/web/src/lib/api/lexicons/types/sh/tangled/git/oid.ts
new file mode 100644
index 000000000..88145ebe1
--- /dev/null
+++ b/web/src/lib/api/lexicons/types/sh/tangled/git/oid.ts
@@ -0,0 +1,23 @@
+import type {} from "@atcute/lexicons";
+import * as v from "@atcute/lexicons/validations";
+
+const _mainSchema = /*#__PURE__*/ v.object({
+  $type: /*#__PURE__*/ v.optional(
+    /*#__PURE__*/ v.literal("sh.tangled.git.oid"),
+  ),
+  /**
+   * @minLength 40
+   * @maxLength 128
+   */
+  oid: /*#__PURE__*/ v.constrain(/*#__PURE__*/ v.string(), [
+    /*#__PURE__*/ v.stringLength(40, 128),
+  ]),
+});
+
+type main$schematype = typeof _mainSchema;
+
+export interface mainSchema extends main$schematype {}
+
+export const mainSchema = _mainSchema as mainSchema;
+
+export interface Main extends v.InferInput<typeof mainSchema> {}