SergeevDmitry · Oct 18, 2026 · Oct 18, 2026
diff --git a/.changeset/mend-json-fix-string-value-completion.md b/.changeset/mend-json-fix-string-value-completion.md
diff --git a/packages/mend-json/CHANGELOG.md b/packages/mend-json/CHANGELOG.md
@@ -1,5 +1,16 @@
 # mend-json
 
+## 1.2.1
+
+### Patch Changes
+
+- 84fa15d: Fix string value completion, which skipped value counting and duplicate-key handling. This caused four issues:
+
+  - Trailing commas after strings (`["x",]`, `{"a":"x",}`) could be accepted as empty closes and reported `complete: true`, violating `finish()`'s validity guarantee.
+  - `duplicateKeyPolicy: 'first'` could keep a later string value or drop following members.
+  - Snapshots ending after a string value's comma (`"...",`) could return `value: undefined` instead of completed values.
+  - `pending.path` ignored completed strings when calculating array indexes.
+
 ## 1.2.0
 
 ### Minor Changes

diff --git a/packages/mend-json/package.json b/packages/mend-json/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mend-json",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Repair truncated JSON from an LLM stream into a valid partial value on every chunk.",
   "keywords": [
     "json",