diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 8a696ef..a426627 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -10,7 +10,7 @@
     {
       "name": "ytstack",
       "description": "Claude Code plugin. Project-OS artifact discipline + curated superpowers and gstack skill wrappers + Agent Teams orchestration.",
-      "version": "0.1.3",
+      "version": "0.1.4",
       "source": "./",
       "author": {
         "name": "Yesterday",
diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
index 7553362..99f8a12 100644
--- a/.claude-plugin/plugin.json
+++ b/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "ytstack",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "Yesterday Technologies Stack -- opinionated software-development OS for AI agents. Curated superpowers + gstack skills plus Project-OS artifact discipline (PROJECT.md, DECISIONS.md, KNOWLEDGE.md, milestone/slice/task hierarchy), orchestrated via SessionStart hooks.",
   "author": {
     "name": "Yesterday",
diff --git a/hooks/session-end b/hooks/session-end
index 3fee9a0..6ebc2e4 100644
--- a/hooks/session-end
+++ b/hooks/session-end
@@ -1,8 +1,11 @@
 #!/usr/bin/env bash
 # ytstack SessionEnd hook
 #
-# Fires when Claude Code ends the session. Updates STATE.md's last_updated
-# timestamp and writes a journal entry with end-of-session marker.
+# Fires when Claude Code ends the session. Appends a journal entry with
+# end-of-session marker. Does NOT mutate STATE.md -- that file is a tracked
+# source-of-truth Markdown, written deliberately by skills as part of state
+# transitions. A hook firing on every session end has no business writing to
+# it (creates phantom diffs on every git status).
 #
 # Side-effects only. Does not emit stdout context.
 
@@ -26,17 +29,6 @@ STATE_FILE="$YT_DIR/STATE.md"
 JOURNAL_DIR="$YT_DIR/journal"
 TS=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
 
-# Update last_updated field in STATE.md (portable BSD + GNU sed)
-if [ -f "$STATE_FILE" ]; then
-  if sed --version >/dev/null 2>&1; then
-    # GNU sed
-    sed -i "s/^last_updated: .*/last_updated: $TS/" "$STATE_FILE"
-  else
-    # BSD sed (macOS)
-    sed -i '' "s/^last_updated: .*/last_updated: $TS/" "$STATE_FILE"
-  fi
-fi
-
 # Append to journal (persistent log of sessions)
 mkdir -p "$JOURNAL_DIR"
 JOURNAL_FILE="$JOURNAL_DIR/sessions.jsonl"