[MEMORY] User wants deterministic IRC-bot-style command dispatch in nanobot where `!command text` invokes a registered Python function or external app and returns output without LLM agent involvement
[MEMORY] User expects nanobot creators to implement custom command registration natively and considers existing workaround solutions unsatisfactory
[MEMORY] User requested patch study only with no actual code changes for nanobot IRC-bot command dispatch feature
[MEMORY] Nanobot CommandRouter has priority/exact/prefix/interceptor tiers but lacks an extension point for custom command registration with all handlers hardcoded in builtin.py
[MEMORY] Proposed nanobot patch adds a custom command tier to CommandRouter dispatching before session lock configured via `commands` section in config.json supporting exec script and python module/function handler types