diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 3bf63cfbd..fe31f6412 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -12,7 +12,7 @@
       "name": "mem0",
       "source": "./mem0-plugin",
       "description": "Mem0 memory layer for AI applications. Add persistent memory, personalization, and semantic search to Claude workflows.",
-      "version": "0.1.2"
+      "version": "0.1.3"
     }
   ]
 }
diff --git a/mem0-plugin/.claude-plugin/plugin.json b/mem0-plugin/.claude-plugin/plugin.json
index 0eb499f98..a91dd5d30 100644
--- a/mem0-plugin/.claude-plugin/plugin.json
+++ b/mem0-plugin/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "mem0",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Mem0 memory layer for AI applications. Add persistent memory, personalization, and semantic search to Claude workflows using the Mem0 Platform MCP server.",
   "author": {
     "name": "Mem0",
diff --git a/mem0-plugin/CHANGELOG.md b/mem0-plugin/CHANGELOG.md
new file mode 100644
index 000000000..6690a1b14
--- /dev/null
+++ b/mem0-plugin/CHANGELOG.md
@@ -0,0 +1,45 @@
+# Changelog
+
+All notable changes to the Mem0 plugin will be documented in this file.
+
+## 0.1.3
+
+### Fixed
+
+- **user_id resolution no longer derives from `MEM0_API_KEY`.** v0.1.2 changed the resolver to fall back to `"mem0-" + sha256(MEM0_API_KEY)[:12]` ahead of `$USER`, which silently moved every existing user to a new bucket on update. Memories written under the previous `$USER` value became unreachable from the plugin. Resolution is now back to `MEM0_USER_ID` → `$USER` → `"default"`.
+- Dropped the "regardless of which machine you're on" line from the SessionStart bootstrap, since cross-machine consolidation now requires setting `MEM0_USER_ID` explicitly.
+
+### Notes for users upgrading from 0.1.2
+
+- The `~/.mem0/identity.json` cache file is no longer read or written. Safe to delete.
+- If you wrote memories during the v0.1.2 window, they live under `mem0-<sha256(api_key)[:12]>`. To recover: temporarily `export MEM0_USER_ID=mem0-<hash>`, search/export, then unset.
+- Want a single bucket across machines (the original goal of #5076)? Set `MEM0_USER_ID` explicitly in your shell profile. The plugin will not auto-derive one.
+
+## 0.1.2
+
+### Added
+
+- Deterministic `user_id` resolver (`_identity.sh` / `_identity.py`) — **reverted in 0.1.3, see above.**
+- SessionStart-compact handler (`capture_compact_summary.py`) that stores the post-compaction summary as a memory with `metadata.type=compact_summary`.
+- Coding-taxonomy setup script (`setup_coding_categories.py`) — one-shot `project.update(custom_categories=[...])` for `architecture_decisions`, `anti_patterns`, `task_learnings`, `tooling_setup`, `bug_fixes`, `coding_conventions`, `user_preferences`.
+- Opt-in hook logging via `MEM0_DEBUG=1` → `~/.mem0/hooks.log`.
+- `mem0-mcp` skill replacing the Claude-Code-specific `mem0-codex` skill.
+
+### Fixed
+
+- `session_id` now written to memory metadata (`on_pre_compact.py`).
+- SessionStart bootstrap exits silently when `MEM0_API_KEY` is unset.
+- `block_memory_write.sh` regex tightened to `MEMORY.md` / `.claude/memory/*` — no longer blocks `docs/memory/*.md`.
+- Removed duplicate PreCompact write path (kept agent-driven, dropped the parallel Python REST entry from `hooks.json` / `cursor-hooks.json`).
+- Hook-side captures (`session_state`, `compact_summary`) now set `expiration_date = today + 90 days`.
+
+## 0.1.1
+
+- Cursor plugin fully functional (`#4547`).
+- Codex plugin support and integration docs (`#4665`).
+- Codex lifecycle hooks via opt-in installer (`#4917`).
+- Removed invalid keys from Claude plugin config (`#4821`).
+
+## 0.1.0
+
+- Initial release: Mem0 plugin for Claude Code and Cursor (`#4518`).