diff --git a/transcripts/share-apis/contribution-diffs/contribution-diff.json b/transcripts/share-apis/contribution-diffs/contribution-diff.json
index f02f232..a9b23df 100644
--- a/transcripts/share-apis/contribution-diffs/contribution-diff.json
+++ b/transcripts/share-apis/contribution-diffs/contribution-diff.json
@@ -453,7 +453,7 @@
     "newRefHash": "#1f9oqkrlfnkhnmfh29c9oiuvlbbta0j29nsmu4me709ber295aji2nuv2t8q7e6pfeji1ge1scdblb4qbg3uvlmcbuiesc8q88e0bqo",
     "oldRef": "diff-start",
     "oldRefHash": "#odojlhcu8m0iaajcjug8mkd84rqib8s273rf46rnn281trtqu56mgkogp2o71ajsmvpvamqo4lvotqj5kare46ci5t26m4oe2vpqjvo",
-    "project": "@transcripts/namespace-diff"
+    "project": "@transcripts/contribution-diff"
   },
   "status": [
     {
diff --git a/transcripts/share-apis/contribution-diffs/create-contribution-for-diff.json b/transcripts/share-apis/contribution-diffs/create-contribution-for-diff.json
index 23bdd1f..457aec1 100644
--- a/transcripts/share-apis/contribution-diffs/create-contribution-for-diff.json
+++ b/transcripts/share-apis/contribution-diffs/create-contribution-for-diff.json
@@ -11,7 +11,7 @@
     "id": "C-<UUID>",
     "numComments": 0,
     "number": 1,
-    "projectRef": "@transcripts/namespace-diff",
+    "projectRef": "@transcripts/contribution-diff",
     "sourceBranchRef": "diff-end",
     "status": "in_review",
     "targetBranchRef": "diff-start",
diff --git a/transcripts/share-apis/contribution-diffs/namespace-diff.json b/transcripts/share-apis/contribution-diffs/namespace-diff.json
index f02f232..a9b23df 100644
--- a/transcripts/share-apis/contribution-diffs/namespace-diff.json
+++ b/transcripts/share-apis/contribution-diffs/namespace-diff.json
@@ -453,7 +453,7 @@
     "newRefHash": "#1f9oqkrlfnkhnmfh29c9oiuvlbbta0j29nsmu4me709ber295aji2nuv2t8q7e6pfeji1ge1scdblb4qbg3uvlmcbuiesc8q88e0bqo",
     "oldRef": "diff-start",
     "oldRefHash": "#odojlhcu8m0iaajcjug8mkd84rqib8s273rf46rnn281trtqu56mgkogp2o71ajsmvpvamqo4lvotqj5kare46ci5t26m4oe2vpqjvo",
-    "project": "@transcripts/namespace-diff"
+    "project": "@transcripts/contribution-diff"
   },
   "status": [
     {
diff --git a/transcripts/share-apis/contribution-diffs/prelude.md b/transcripts/share-apis/contribution-diffs/prelude.md
index fbea165..dbf3843 100644
--- a/transcripts/share-apis/contribution-diffs/prelude.md
+++ b/transcripts/share-apis/contribution-diffs/prelude.md
@@ -1,7 +1,7 @@
 ```ucm:hide
-.> project.create-empty namespace-diff
-namespace-diff/main> branch /diff-start
-namespace-diff/diff-start> builtins.mergeio
+.> project.create-empty contribution-diff
+contribution-diff/main> branch /diff-start
+contribution-diff/diff-start> builtins.mergeio
 ```
 
 ```unison
@@ -48,22 +48,22 @@ deleteMeAfterFork = "delete me after fork"
 ```
 
 ```ucm:hide
-namespace-diff/diff-start> add
-namespace-diff/diff-start> push @transcripts/namespace-diff/diff-start
-namespace-diff/diff-start> branch /diff-end
-namespace-diff/diff-end> alias.term termAliasMe aTermAlias
-namespace-diff/diff-end> delete.term termDeleteMe
-namespace-diff/diff-end> alias.type DataAliasMe ATypeAlias
-namespace-diff/diff-end> delete.type DataDeleteMe
-namespace-diff/diff-end> delete.namespace DataDeleteMe
-namespace-diff/diff-end> alias.type AbilityAliasMe AbilityAlias
-namespace-diff/diff-end> delete.type AbilityDeleteMe
-namespace-diff/diff-end> delete.namespace AbilityDeleteMe
-namespace-diff/diff-end> delete.term a.definition.at.path1
-namespace-diff/diff-end> delete.term a.definition.at.path2
-namespace-diff/diff-end> delete.term a.different.path
-namespace-diff/diff-end> delete.term aDoc
-namespace-diff/diff-end> delete.term aTest
+contribution-diff/diff-start> add
+contribution-diff/diff-start> push @transcripts/contribution-diff/diff-start
+contribution-diff/diff-start> branch /diff-end
+contribution-diff/diff-end> alias.term termAliasMe aTermAlias
+contribution-diff/diff-end> delete.term termDeleteMe
+contribution-diff/diff-end> alias.type DataAliasMe ATypeAlias
+contribution-diff/diff-end> delete.type DataDeleteMe
+contribution-diff/diff-end> delete.namespace DataDeleteMe
+contribution-diff/diff-end> alias.type AbilityAliasMe AbilityAlias
+contribution-diff/diff-end> delete.type AbilityDeleteMe
+contribution-diff/diff-end> delete.namespace AbilityDeleteMe
+contribution-diff/diff-end> delete.term a.definition.at.path1
+contribution-diff/diff-end> delete.term a.definition.at.path2
+contribution-diff/diff-end> delete.term a.different.path
+contribution-diff/diff-end> delete.term aDoc
+contribution-diff/diff-end> delete.term aTest
 ```
 
 ```unison
@@ -83,13 +83,13 @@ ability AbilityNew where
 ```
 
 ```ucm
-namespace-diff/diff-end> update
-namespace-diff/diff-end> rename.term termRenameMe renamedTerm
-namespace-diff/diff-end> rename.type DataRenameMe RenamedType
-namespace-diff/diff-end> rename.namespace DataRenameMe RenamedType
-namespace-diff/diff-end> rename.type AbilityRenameMe AbilityRenamed
-namespace-diff/diff-end> rename.namespace AbilityRenameMe AbilityRenamed
-namespace-diff/diff-end> push @transcripts/namespace-diff/diff-end
+contribution-diff/diff-end> update
+contribution-diff/diff-end> rename.term termRenameMe renamedTerm
+contribution-diff/diff-end> rename.type DataRenameMe RenamedType
+contribution-diff/diff-end> rename.namespace DataRenameMe RenamedType
+contribution-diff/diff-end> rename.type AbilityRenameMe AbilityRenamed
+contribution-diff/diff-end> rename.namespace AbilityRenameMe AbilityRenamed
+contribution-diff/diff-end> push @transcripts/contribution-diff/diff-end
 ```
 
 Now we go back to the `diff-start` branch and make some more commits to test that 
@@ -103,7 +103,7 @@ termUpdateMe = "conflicted update"
 ```
 
 ```ucm
-namespace-diff/diff-start> update
-namespace-diff/diff-start> delete.term deleteMeAfterFork
-namespace-diff/diff-start> push @transcripts/namespace-diff/diff-start
+contribution-diff/diff-start> update
+contribution-diff/diff-start> delete.term deleteMeAfterFork
+contribution-diff/diff-start> push @transcripts/contribution-diff/diff-start
 ```
diff --git a/transcripts/share-apis/contribution-diffs/run.zsh b/transcripts/share-apis/contribution-diffs/run.zsh
index b80be31..a9db960 100755
--- a/transcripts/share-apis/contribution-diffs/run.zsh
+++ b/transcripts/share-apis/contribution-diffs/run.zsh
@@ -6,9 +6,9 @@ source "../../transcript_helpers.sh"
 
 transcript_ucm transcript prelude.md
 
-fetch "$transcript_user" GET namespace-diff '/users/transcripts/projects/namespace-diff/diff/namespaces?old=diff-start&new=diff-end'
+fetch "$transcript_user" GET namespace-diff '/users/transcripts/projects/contribution-diff/diff/namespaces?old=diff-start&new=diff-end'
 
-fetch "$transcript_user" POST create-contribution-for-diff '/users/transcripts/projects/namespace-diff/contributions' '{
+fetch "$transcript_user" POST create-contribution-for-diff '/users/transcripts/projects/contribution-diff/contributions' '{
     "title": "My contribution",
     "description": "My description",
     "status": "in_review",
@@ -16,4 +16,10 @@ fetch "$transcript_user" POST create-contribution-for-diff '/users/transcripts/p
     "targetBranchRef": "diff-start"
 }'
 
-fetch "$transcript_user" GET contribution-diff '/users/transcripts/projects/namespace-diff/contributions/1/diff'
+fetch "$transcript_user" GET contribution-diff '/users/transcripts/projects/contribution-diff/contributions/1/diff'
+
+# Diffing a user-defined term against a user-defined term.
+fetch "$transcript_user" GET standard-term-diff '/users/transcripts/projects/contribution-diff/contributions/1/diff/terms?oldTerm=termUpdateMe&newTerm=termUpdateMe'
+
+# Diffing a user-defined type against a user-defined type.
+fetch "$transcript_user" GET standard-type-diff '/users/transcripts/projects/contribution-diff/contributions/1/diff/types?oldType=DataUpdateMe&newType=DataUpdateMe'
diff --git a/transcripts/share-apis/contribution-diffs/standard-term-diff.json b/transcripts/share-apis/contribution-diffs/standard-term-diff.json
new file mode 100644
index 0000000..3bf4128
--- /dev/null
+++ b/transcripts/share-apis/contribution-diffs/standard-term-diff.json
@@ -0,0 +1,222 @@
+{
+  "body": {
+    "diff": {
+      "contents": [
+        {
+          "diffTag": "both",
+          "elements": [
+            {
+              "annotation": {
+                "contents": "termUpdateMe",
+                "tag": "HashQualifier"
+              },
+              "segment": "termUpdateMe"
+            },
+            {
+              "annotation": {
+                "tag": "TypeAscriptionColon"
+              },
+              "segment": " :"
+            },
+            {
+              "annotation": null,
+              "segment": " "
+            },
+            {
+              "annotation": {
+                "contents": "##Text",
+                "tag": "TypeReference"
+              },
+              "segment": "Text"
+            },
+            {
+              "annotation": null,
+              "segment": "\n"
+            },
+            {
+              "annotation": {
+                "contents": "termUpdateMe",
+                "tag": "HashQualifier"
+              },
+              "segment": "termUpdateMe"
+            },
+            {
+              "annotation": {
+                "tag": "BindingEquals"
+              },
+              "segment": " ="
+            },
+            {
+              "annotation": null,
+              "segment": " "
+            }
+          ]
+        },
+        {
+          "annotation": {
+            "tag": "TextLiteral"
+          },
+          "diffTag": "segmentChange",
+          "fromSegment": "\"original\"",
+          "toSegment": "\"updated\""
+        }
+      ],
+      "tag": "UserObject"
+    },
+    "diffKind": "diff",
+    "newBranchRef": "diff-end",
+    "newTerm": {
+      "bestTermName": "termUpdateMe",
+      "defnTermTag": "Plain",
+      "signature": [
+        {
+          "annotation": {
+            "contents": "##Text",
+            "tag": "TypeReference"
+          },
+          "segment": "Text"
+        }
+      ],
+      "termDefinition": {
+        "contents": [
+          {
+            "annotation": {
+              "contents": "termUpdateMe",
+              "tag": "HashQualifier"
+            },
+            "segment": "termUpdateMe"
+          },
+          {
+            "annotation": {
+              "tag": "TypeAscriptionColon"
+            },
+            "segment": " :"
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "contents": "##Text",
+              "tag": "TypeReference"
+            },
+            "segment": "Text"
+          },
+          {
+            "annotation": null,
+            "segment": "\n"
+          },
+          {
+            "annotation": {
+              "contents": "termUpdateMe",
+              "tag": "HashQualifier"
+            },
+            "segment": "termUpdateMe"
+          },
+          {
+            "annotation": {
+              "tag": "BindingEquals"
+            },
+            "segment": " ="
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "tag": "TextLiteral"
+            },
+            "segment": "\"updated\""
+          }
+        ],
+        "tag": "UserObject"
+      },
+      "termDocs": [],
+      "termNames": [
+        "termUpdateMe"
+      ]
+    },
+    "oldBranchRef": "diff-start",
+    "oldTerm": {
+      "bestTermName": "termUpdateMe",
+      "defnTermTag": "Plain",
+      "signature": [
+        {
+          "annotation": {
+            "contents": "##Text",
+            "tag": "TypeReference"
+          },
+          "segment": "Text"
+        }
+      ],
+      "termDefinition": {
+        "contents": [
+          {
+            "annotation": {
+              "contents": "termUpdateMe",
+              "tag": "HashQualifier"
+            },
+            "segment": "termUpdateMe"
+          },
+          {
+            "annotation": {
+              "tag": "TypeAscriptionColon"
+            },
+            "segment": " :"
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "contents": "##Text",
+              "tag": "TypeReference"
+            },
+            "segment": "Text"
+          },
+          {
+            "annotation": null,
+            "segment": "\n"
+          },
+          {
+            "annotation": {
+              "contents": "termUpdateMe",
+              "tag": "HashQualifier"
+            },
+            "segment": "termUpdateMe"
+          },
+          {
+            "annotation": {
+              "tag": "BindingEquals"
+            },
+            "segment": " ="
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "tag": "TextLiteral"
+            },
+            "segment": "\"original\""
+          }
+        ],
+        "tag": "UserObject"
+      },
+      "termDocs": [],
+      "termNames": [
+        "termUpdateMe"
+      ]
+    },
+    "project": "@transcripts/contribution-diff"
+  },
+  "status": [
+    {
+      "status_code": 200
+    }
+  ]
+}
diff --git a/transcripts/share-apis/contribution-diffs/standard-type-diff.json b/transcripts/share-apis/contribution-diffs/standard-type-diff.json
new file mode 100644
index 0000000..a313a98
--- /dev/null
+++ b/transcripts/share-apis/contribution-diffs/standard-type-diff.json
@@ -0,0 +1,178 @@
+{
+  "body": {
+    "diff": {
+      "contents": [
+        {
+          "diffTag": "both",
+          "elements": [
+            {
+              "annotation": {
+                "tag": "DataTypeKeyword"
+              },
+              "segment": "type"
+            },
+            {
+              "annotation": null,
+              "segment": " "
+            },
+            {
+              "annotation": {
+                "contents": "DataUpdateMe",
+                "tag": "HashQualifier"
+              },
+              "segment": "DataUpdateMe"
+            },
+            {
+              "annotation": {
+                "tag": "DelimiterChar"
+              },
+              "segment": " = "
+            }
+          ]
+        },
+        {
+          "diffTag": "old",
+          "elements": [
+            {
+              "annotation": {
+                "contents": "#fhc8jn2bhvfdnfr89dv2jf7tekuesna7gvje4ck6lfheh9rb184q4ddd29vm9mvfm6u1a98kpgditn8vb09durtel67rpof1c62535o#d0",
+                "tag": "TermReference"
+              },
+              "segment": "D"
+            }
+          ]
+        },
+        {
+          "diffTag": "new",
+          "elements": [
+            {
+              "annotation": {
+                "contents": "#qnblpurkqedrq0kae95ep7b8f6uh5b7igefp21r1nvl22agjoup5e7aunua4q8ku8mb532fh3lst4mj3m2bsb3kluchc3fuau5cllr0#d0",
+                "tag": "TermReference"
+              },
+              "segment": "D2"
+            },
+            {
+              "annotation": null,
+              "segment": " "
+            },
+            {
+              "annotation": {
+                "contents": "##Nat",
+                "tag": "TypeReference"
+              },
+              "segment": "Nat"
+            }
+          ]
+        }
+      ],
+      "tag": "UserObject"
+    },
+    "diffKind": "diff",
+    "newBranchRef": "diff-end",
+    "newType": {
+      "bestTypeName": "DataUpdateMe",
+      "defnTypeTag": "Data",
+      "typeDefinition": {
+        "contents": [
+          {
+            "annotation": {
+              "tag": "DataTypeKeyword"
+            },
+            "segment": "type"
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "contents": "DataUpdateMe",
+              "tag": "HashQualifier"
+            },
+            "segment": "DataUpdateMe"
+          },
+          {
+            "annotation": {
+              "tag": "DelimiterChar"
+            },
+            "segment": " = "
+          },
+          {
+            "annotation": {
+              "contents": "#qnblpurkqedrq0kae95ep7b8f6uh5b7igefp21r1nvl22agjoup5e7aunua4q8ku8mb532fh3lst4mj3m2bsb3kluchc3fuau5cllr0#d0",
+              "tag": "TermReference"
+            },
+            "segment": "D2"
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "contents": "##Nat",
+              "tag": "TypeReference"
+            },
+            "segment": "Nat"
+          }
+        ],
+        "tag": "UserObject"
+      },
+      "typeDocs": [],
+      "typeNames": [
+        "DataUpdateMe"
+      ]
+    },
+    "oldBranchRef": "diff-start",
+    "oldType": {
+      "bestTypeName": "DataUpdateMe",
+      "defnTypeTag": "Data",
+      "typeDefinition": {
+        "contents": [
+          {
+            "annotation": {
+              "tag": "DataTypeKeyword"
+            },
+            "segment": "type"
+          },
+          {
+            "annotation": null,
+            "segment": " "
+          },
+          {
+            "annotation": {
+              "contents": "DataUpdateMe",
+              "tag": "HashQualifier"
+            },
+            "segment": "DataUpdateMe"
+          },
+          {
+            "annotation": {
+              "tag": "DelimiterChar"
+            },
+            "segment": " = "
+          },
+          {
+            "annotation": {
+              "contents": "#fhc8jn2bhvfdnfr89dv2jf7tekuesna7gvje4ck6lfheh9rb184q4ddd29vm9mvfm6u1a98kpgditn8vb09durtel67rpof1c62535o#d0",
+              "tag": "TermReference"
+            },
+            "segment": "D"
+          }
+        ],
+        "tag": "UserObject"
+      },
+      "typeDocs": [],
+      "typeNames": [
+        "DataUpdateMe"
+      ]
+    },
+    "project": "@transcripts/contribution-diff"
+  },
+  "status": [
+    {
+      "status_code": 200
+    }
+  ]
+}