- Anthropic Messages API (2023-06-01) SSE streaming: text/thinking/tool_use blocks, cache usage, stop-reason mapping, errors encoded as events - OpenAI Responses API + Chat Completions (switchable), tool_calls delta accumulation, include_usage, reasoning_content -> thinking - ProviderConfig with base_url/api_key/context_window/timeout; known-model context-window table with three-layer resolution - background current-thread runtime bridges sync agent loop to async I/O - mock-transport replay tests (chunks straddle SSE boundaries) + full agent integration test
focus-cli is deleted entirely (the TUI will be a new crate later); the old Anthropic/OpenAI/Zai provider sources and the core mock module are removed as part of the rewrite.
DaiChaoXiong