spec: Add client features UX patterns (sampling/elicitation) (#1011)

Updates UX specs for better integration of client-initiated features:

v2_ux_features.md:
- Tools Screen: Inline client request queue during tool execution
- History Screen: Hierarchical request trace showing parent-child relationships
- Logging Screen: Request correlation with correlation IDs and chain filtering

v2_ux_handlers.md:
- Sampling Panel: Inline expansion pattern + tool calling flow (2025-11-25 spec)
- Elicitation Handler: Inline expansion pattern with schema constraints
- Sampling Providers & Testing Profiles: Extensible architecture for response handlers

Key design decisions:
- Request Trace Model shows causal chains between requests
- Client requests appear inline with triggering tool calls
- Auto-response profiles enable efficient testing workflows
- Extensible provider architecture supports future LLM plugins

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Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
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Ola Hungerford 2026-02-04 09:27:23 -07:00 • committed by GitHub
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