Function default_coding_assembly 

pub fn default_coding_assembly(
    tools: Arc<ToolRegistry>,
    cwd: PathBuf,
    skills: Option<Arc<SkillRegistry>>,
    path: TaskPath,
) -> PromptAssembly

Build a standard coding-agent prompt assembly.

This is the recommended default for software-engineering sessions. It includes the minimum shared guidance needed for software-engineering sessions: identity, safety rules, task path, the current date, and the working directory.

Optional sections such as skills, memory, profiles, MCP tools, and git status can be added afterwards by the caller.