Author Cast agent code in advanced mode — blueprint files (identity, channels, props, assets) and per-agent service code under blueprint/service/. Use when the operator wants to write or change something inside one or more agent folders that the in-Cast consoles can't reach (custom service code, scripted blueprint edits, cross-agent folder ops like rename/restore/bulk-delete). Pair with /cast-refine for introspection-first improvement and /cast-debug for diagnosing misbehavior.
Diagnose Cast behavior end-to-end — agent misbehavior (why did the agent do X? why no reply?) or Cast-server / pipeline issues (why isn't this message arriving? why won't the container start?). Reads gateway DB, agent.db message_log, agent-runner log, session transcripts, and host server logs layer by layer. When the root cause is a defect in Cast itself, produces a standardized, redacted bug report (environment + diagnosis + evidence) ready to submit upstream. Pair with /cast-refine when the question is "what should grow?" rather than "what broke?" and /cast-build when you've diagnosed the issue and need to write the fix.
Help a Cast agent become more itself — read across its blueprint, runtime state, memory, and operator-action history to surface blueprint refinement proposals. Use after the agent has weeks of real run history and the operator senses drift, friction, or untapped potential. Output is proposals (a dated artifact), not edits. Pair with /cast-build for implementation and /cast-debug when the question is "what broke?" rather than "what should grow?"