Skip build for lightweight stages (analyse, architect, release, maintenance)

These stages only read code and post comments — no need for npm install,
frontend build, Playwright, or migrations. Saves several minutes.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

coder/cloudflare-worker/main.tf

@@ -460,6 +460,11 @@ resource "coder_agent" "main" {
       # Switch to develop branch if it exists
       git fetch origin develop 2>/dev/null && git checkout develop 2>/dev/null || true
 
+      # Lightweight stages only need the code, not a full build
+      LIGHT_STAGES="analyse architect release maintenance"
+      if echo "$LIGHT_STAGES" | grep -qw "$TASK_TYPE"; then
+        echo "Lightweight stage ($TASK_TYPE) — skipping build"
+      else
         # Install deps if package.json exists
         if [ -f package.json ]; then
           npm ci --legacy-peer-deps || npm ci
@@ -481,6 +486,7 @@ resource "coder_agent" "main" {
           echo "Local migrations applied"
         fi
       fi
+    fi
 
     # --- Automated task execution ---
     if [ -n "$TASK_TYPE" ] && [ -d ~/project ]; then