Context-aware task execution with Serena MCP backend. First time: Explores project, saves to Serena,
runs spec if complex, executes waves. Returning: Loads from Serena (<1s), detects changes, executes
with cached context. Intelligently decides when to research, when to spec, when to prime. One catch-all
intelligent execution command. Use when: User wants task executed in any project (new or existing).