Telemetry integration for SkillKit.

All events are prefixed with [:skill_kit]. Unless specified, all times are in :native units.

Boundary spans

Each agent boundary emits a span with :start and :stop events:

• [:skill_kit, :tool_use, :start/:stop] — individual tool execution
• [:skill_kit, :tool_batch, :start/:stop] — batch of parallel tool calls
• [:skill_kit, :subagent, :start/:stop] — spawning a subagent
• [:skill_kit, :conversation_save, :start/:stop] — persisting history
• [:skill_kit, :conversation_load, :start/:stop] — loading history
• [:skill_kit, :llm_request, :start/:stop] — LLM API request
• [:skill_kit, :turn, :start/:stop] — processing a message batch

LLM events

• [:skill_kit, :llm, :stream, :start/:stop] — LLM stream lifecycle
• [:skill_kit, :llm, :stream, :error] — model URI resolution failure