feat(warp): include session_name in structured payloads

plugins/warp/.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "warp",
   "description": "Warp terminal integration for Claude Code - native notifications, and more to come",
-  "version": "2.2.0",
+  "version": "2.3.0",
   "author": {
     "name": "Warp",
     "url": "https://warp.dev"

plugins/warp/scripts/build-payload.sh

@@ -10,7 +10,7 @@
 #       --arg response "$RESPONSE" \
 #       --arg transcript_path "$TRANSCRIPT_PATH")
 #
-# The function extracts common fields (session_id, cwd, project) from the
+# The function extracts common fields (session_id, cwd, project, session_name) from the
 # hook's stdin JSON (passed as $1), then merges any extra jq args you pass.
 
 # The current protocol version this plugin knows how to produce.
@@ -27,6 +27,26 @@ negotiate_protocol_version() {
     fi
 }
 
+# Look up the human-readable session name from Claude Code's session registry.
+# Claude Code writes one JSON file per running session to ~/.claude/sessions/
+# (keyed by pid) containing sessionId, name, status, etc. The name is kept
+# up to date on /rename, so reading it at payload-build time reflects renames.
+# Prints an empty string if the registry or session can't be found.
+lookup_session_name() {
+    local session_id="$1"
+    [ -n "$session_id" ] || return 0
+
+    local sessions_dir="${CLAUDE_SESSIONS_DIR:-${CLAUDE_CONFIG_DIR:-$HOME/.claude}/sessions}"
+    [ -d "$sessions_dir" ] || return 0
+
+    local files=("$sessions_dir"/*.json)
+    [ -e "${files[0]}" ] || return 0
+
+    jq -rs --arg sid "$session_id" \
+        '[.[] | select(type == "object" and .sessionId == $sid)] | max_by(.updatedAt // 0) | .name // empty' \
+        "${files[@]}" 2>/dev/null
+}
+
 build_payload() {
     local input="$1"
     local event="$2"
@@ -36,13 +56,14 @@ build_payload() {
     protocol_version=$(negotiate_protocol_version)
 
     # Extract common fields from the hook input
-    local session_id cwd project
+    local session_id cwd project session_name
     session_id=$(echo "$input" | jq -r '.session_id // empty' 2>/dev/null)
     cwd=$(echo "$input" | jq -r '.cwd // empty' 2>/dev/null)
     project=""
     if [ -n "$cwd" ]; then
         project=$(basename "$cwd")
     fi
+    session_name=$(lookup_session_name "$session_id")
 
     # Build the payload: common fields + any extra args passed by the caller.
     # Extra args should be jq flag pairs like: --arg key "value" or --argjson key '{"a":1}'
@@ -53,6 +74,7 @@ build_payload() {
         --arg session_id "$session_id" \
         --arg cwd "$cwd" \
         --arg project "$project" \
+        --arg session_name "$session_name" \
         "$@" \
-        '{v:$v, agent:$agent, event:$event, session_id:$session_id, cwd:$cwd, project:$project} + $ARGS.named'
+        '{v:$v, agent:$agent, event:$event, session_id:$session_id, cwd:$cwd, project:$project, session_name:$session_name} + $ARGS.named'
 }

plugins/warp/tests/test-hooks.sh

@@ -66,6 +66,29 @@ assert_json_field "empty session_id" "$PAYLOAD" ".session_id" ""
 assert_json_field "empty cwd" "$PAYLOAD" ".cwd" ""
 assert_json_field "empty project" "$PAYLOAD" ".project" ""
 
+echo ""
+echo "--- Session name lookup ---"
+SESSIONS_FIXTURE=$(mktemp -d)
+echo '{"pid":111,"sessionId":"sess-123","name":"my renamed session","status":"idle"}' > "$SESSIONS_FIXTURE/111.json"
+echo '{"pid":222,"sessionId":"sess-other","name":"other session","status":"busy"}' > "$SESSIONS_FIXTURE/222.json"
+
+export CLAUDE_SESSIONS_DIR="$SESSIONS_FIXTURE"
+PAYLOAD=$(build_payload '{"session_id":"sess-123","cwd":"/Users/alice/my-project"}' "stop")
+assert_json_field "session_name from registry" "$PAYLOAD" ".session_name" "my renamed session"
+
+PAYLOAD=$(build_payload '{"session_id":"sess-unknown","cwd":"/tmp/proj"}' "stop")
+assert_json_field "unknown session id yields empty name" "$PAYLOAD" ".session_name" ""
+
+PAYLOAD=$(build_payload '{"cwd":"/tmp/proj"}' "stop")
+assert_json_field "missing session id yields empty name" "$PAYLOAD" ".session_name" ""
+
+export CLAUDE_SESSIONS_DIR="$SESSIONS_FIXTURE/does-not-exist"
+PAYLOAD=$(build_payload '{"session_id":"sess-123","cwd":"/tmp/proj"}' "stop")
+assert_json_field "missing registry dir yields empty name" "$PAYLOAD" ".session_name" ""
+
+unset CLAUDE_SESSIONS_DIR
+rm -rf "$SESSIONS_FIXTURE"
+
 echo ""
 echo "--- Extra args are merged ---"
 PAYLOAD=$(build_payload '{"session_id":"s1","cwd":"/tmp/proj"}' "stop" \