Module result 

Split tool results: Dual-channel output for LLM and UI

Implements Phase 4 of pi-coding-agent integration:

• LLM content: Concise summaries optimized for token efficiency
• UI content: Rich output with full details for user display

Expected savings: 20-30% on tool-heavy sessions (97% on tool output tokens)

Structs

TokenCounts

Token counting for split tool results

ToolMetadata

Metadata accompanying tool results

ToolMetadataBuilder

Builder for ToolMetadata

ToolResult

Result from tool execution with dual-channel output