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Add belaykit/pi package that wraps the pi CLI (github.com/badlogic/pi-mono) as a belaykit.Agent implementation. - Runs pi in --mode json for structured JSONL event streaming - Maps pi events to belaykit EventTypes (assistant, tool_use, tool_result, etc.) - Extracts real token usage and cost from pi's usage data in message_end events - Supports pi-specific options: provider, thinking level, tool control, extensions, workdir - Includes PricingForModel/ContextWindowForModel for common models across providers - Full observability integration via RecordCompletion with actual token counts
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Add
belaykit/pipackage — a provider that wraps the pi coding agent CLI as abelaykit.Agentimplementation.What it does
Runs
pi --mode json --no-session -p <prompt>and parses the JSONL event stream, mapping pi's events to belaykit'sEventtypes:sessionEventSystemturn_startEventAssistantStartmessage_update(text_delta)EventAssistanttool_execution_startEventToolUsetool_execution_endEventToolResultmessage_endagent_endEventResultPi-specific options
Beyond the standard
WithExecutable,WithDefaultModel,WithDefaultEventHandler,WithObservability:WithDefaultProvider— set LLM provider (anthropic, openai, google, etc.)WithDefaultThinking— set thinking level (off, minimal, low, medium, high, xhigh)WithTools/WithNoTools— control which built-in tools are availableWithExtension— load pi extensionsWithWorkDir— set the working directory for the pi processUsage
Token usage
Unlike shelling out to Claude CLI (which reports cost directly in its result event), pi reports per-message usage in
message_endevents with input/output token counts and cost breakdowns. The provider accumulates these across all messages and passes real numbers toRecordCompletion.Files
pi/pi.go—Clientstruct,Runimplementation, JSONL parserpi/options.go—ClientOptionfunctionspi/models.go—PricingForModel,ContextWindowForModelhelpers