fix: improve local script UX -- add SPAWN_PROMPT support, fix prompt escaping, standardize messages (#863)

- local/cline.sh: Add missing SPAWN_PROMPT non-interactive mode support,
  replace manual sed -i.bak env var handling with inject_env_vars_local
  (eliminates leftover .bak files), add installation verification
- local/plandex.sh: Replace manual shell config handling with
  inject_env_vars_local for consistency, fix printf '%q' prompt escaping
  that corrupted prompt text with literal backslashes
- local/aider.sh: Fix printf '%q' prompt escaping -- pass SPAWN_PROMPT
  directly as quoted argument instead of shell-escaping it
- local/interpreter.sh: Same printf '%q' fix as aider.sh
- 7 local scripts: Standardize "Appending environment variables to
  ~/.zshrc..." to "Setting up environment variables..." for consistency
  with all other cloud providers

Agent: ux-engineer

Co-authored-by: A <6723574+louisgv@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

local/aider.sh

@@ -56,8 +56,7 @@ echo ""
 if [[ -n "${SPAWN_PROMPT:-}" ]]; then
     log_step "Executing Aider with prompt..."
     source ~/.zshrc 2>/dev/null || true
-    escaped_prompt=$(printf '%q' "${SPAWN_PROMPT}")
-    aider --model "openrouter/${MODEL_ID}" -m "${escaped_prompt}"
+    aider --model "openrouter/${MODEL_ID}" -m "${SPAWN_PROMPT}"
 else
     log_step "Starting Aider..."
     sleep 1

local/cline.sh

@@ -23,6 +23,15 @@ if ! command -v npm &>/dev/null; then
 fi
 npm install -g cline
 
+# Verify installation
+if ! command -v cline &>/dev/null; then
+    log_error "Cline installation failed"
+    log_error "The 'cline' command is not available"
+    log_error "Try installing manually: npm install -g cline"
+    exit 1
+fi
+log_info "Cline installation verified"
+
 echo ""
 if [[ -n "${OPENROUTER_API_KEY:-}" ]]; then
     log_info "Using OpenRouter API key from environment"
@@ -37,10 +46,18 @@ inject_env_vars_local upload_file run_server \
     "OPENAI_BASE_URL=https://openrouter.ai/api/v1"
 
 echo ""
-log_info "Local machine setup completed successfully!"
+log_info "Local setup completed successfully!"
 echo ""
 
-log_step "Starting Cline..."
-sleep 1
-clear
-cline
+# Start Cline
+if [[ -n "${SPAWN_PROMPT:-}" ]]; then
+    log_step "Executing Cline with prompt..."
+    source ~/.zshrc 2>/dev/null || true
+    cline "${SPAWN_PROMPT}"
+else
+    log_step "Starting Cline..."
+    sleep 1
+    clear 2>/dev/null || true
+    source ~/.zshrc 2>/dev/null || true
+    exec cline
+fi

local/interpreter.sh

@@ -55,8 +55,7 @@ echo ""
 if [[ -n "${SPAWN_PROMPT:-}" ]]; then
     log_step "Executing Open Interpreter with prompt..."
     source ~/.zshrc 2>/dev/null || true
-    escaped_prompt=$(printf '%q' "${SPAWN_PROMPT}")
-    interpreter -m "${escaped_prompt}"
+    interpreter -m "${SPAWN_PROMPT}"
 else
     log_step "Starting Open Interpreter..."
     sleep 1

local/plandex.sh

@@ -16,7 +16,7 @@ echo ""
 ensure_local_ready
 
 SERVER_NAME=$(get_server_name)
-log_info "Running on: ${SERVER_NAME}"
+create_server "${SERVER_NAME}"
 
 # Install Plandex
 log_step "Installing Plandex..."
@@ -51,18 +51,14 @@ echo ""
 if [[ -n "${SPAWN_PROMPT:-}" ]]; then
     # Non-interactive mode: execute prompt and exit
     log_step "Executing Plandex with prompt..."
-
-    # Escape prompt for safe shell execution
-    escaped_prompt=$(printf '%q' "${SPAWN_PROMPT}")
-
-    # Execute without TTY
     source ~/.zshrc 2>/dev/null || true
-    plandex new && plandex tell ${escaped_prompt}
+    plandex new
+    plandex tell "${SPAWN_PROMPT}"
 else
     # Interactive mode: start Plandex normally
     log_step "Starting Plandex..."
     sleep 1
-    clear
+    clear 2>/dev/null || true
     source ~/.zshrc 2>/dev/null || true
     exec plandex
 fi