Performance Monitor Structure

• init.ts registers the command and monitoring capability provider.
• provider.ts accepts batched completed spans without blocking measured work.
• db.ts stores spans and reconstructs recent traces.
• adapter.ts renders the recent trace list and per-trace waterfall.
• format.ts exports deterministic flat reports for copying and AI tools.
• ai.ts exposes read-only trace list/show tools and generated skill guidance.
• definition.ts defines the list and show commands.