diff --git a/scripts/dev.sh b/scripts/dev.sh
index d4e8426de..3ddc9104e 100755
--- a/scripts/dev.sh
+++ b/scripts/dev.sh
@@ -5,17 +5,34 @@ set -e
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 export PATH="$SCRIPT_DIR/../node_modules/.bin:$PATH"
 
-# Use a temporary PASEO_HOME to avoid conflicts between dev instances
+# Derive PASEO_HOME: stable name for worktrees, temporary dir otherwise
 if [ -z "${PASEO_HOME}" ]; then
   export PASEO_HOME
-  PASEO_HOME="$(mktemp -d "${TMPDIR:-/tmp}/paseo-dev.XXXXXX")"
-  trap "rm -rf '$PASEO_HOME'" EXIT
+  GIT_DIR="$(git rev-parse --git-dir 2>/dev/null || true)"
+  GIT_COMMON_DIR="$(git rev-parse --git-common-dir 2>/dev/null || true)"
+  if [ -n "$GIT_DIR" ] && [ -n "$GIT_COMMON_DIR" ] && [ "$GIT_DIR" != "$GIT_COMMON_DIR" ]; then
+    # Inside a worktree — derive a stable home from the worktree name
+    WORKTREE_ROOT="$(git rev-parse --show-toplevel)"
+    WORKTREE_NAME="$(basename "$WORKTREE_ROOT" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9-]/-/g; s/--*/-/g; s/^-//; s/-$//')"
+    PASEO_HOME="$HOME/.paseo-${WORKTREE_NAME}"
+    mkdir -p "$PASEO_HOME"
+  else
+    PASEO_HOME="$(mktemp -d "${TMPDIR:-/tmp}/paseo-dev.XXXXXX")"
+    trap "rm -rf '$PASEO_HOME'" EXIT
+  fi
+fi
+
+# Share speech models with the main install to avoid duplicate downloads
+if [ -z "${PASEO_LOCAL_MODELS_DIR}" ]; then
+  export PASEO_LOCAL_MODELS_DIR="$HOME/.paseo/models/local-speech"
+  mkdir -p "$PASEO_LOCAL_MODELS_DIR"
 fi
 
 echo "══════════════════════════════════════════════════════"
 echo "  Paseo Dev"
 echo "══════════════════════════════════════════════════════"
 echo "  Home:    ${PASEO_HOME}"
+echo "  Models:  ${PASEO_LOCAL_MODELS_DIR}"
 echo "══════════════════════════════════════════════════════"
 
 # Configure the daemon for the Portless app origin and let the app bootstrap