Timbal Files

What's Changed

• fix(types): drop assistant turns left empty after cross-provider replay (38af6be8)
• fix(core): let server-side tools coexist with client tools and survive provider switches (71025693)
• refactor(tests): move parallelism and files-integration tests to state/ and types/ (ea8b356d)
• feat(core): enable Anthropic automatic prompt caching by default — cache reads cost 0.1x (155242e4)
• refactor(tests): mirror package layout — move tracing/llm/collector tests out of tests/core (f2c31ed4)
• refactor(core): split llm_router into core/llm package — one module per concern, zero perf cost (3a9fb885)
• refactor(codegen,evals): extract shared helpers to kill copy-paste clones — net -187 lines (e763f511)
• fix(core): rename command-path loop variable shadowing the agent iteration counter (fbe517dc)
• fix(core): sync generators yielding None no longer truncate the stream (c994dc7a)
• perf(codegen): lazy transformer registration — CLI --help 381ms -> 60ms (2f7882ad)
• test: bump files-integration anthropic model to claude-sonnet-5 (38e4a710)
• perf(core): per-provider SDK isolation — anthropic-only runs never import openai (085695bb)
• perf(core): lazy provider-SDK imports — 'from timbal import Agent' 1.28s -> 0.39s (de7d4490)
• fix(server): don't pre-load voice ONNX models for non-voice deployments (b8e99481)
• fix(core): re-raise pending cancellation in agent tool fast paths (5923a4eb)
• bench: clear traces per latency iteration in long-conversation harness (9372eaaf)
• bench: refresh all cross-framework results after the perf branch (c922cb83)
• fix(core): restore caller's run context after nested top-level runnable (afbe96a0)
• feat(core): warn once when a sync handler blocks the event loop (4db236bb)
• perf(core): sequential fast path for linear workflows + shared _run_step (76db757e)
• perf(core): cache Message dumps + cut serialization overhead on long histories (8520ce19)
• bench: long conversations / long messages vs LangGraph (6d37bce1)
• refactor(core): decompose Runnable._stream into named lifecycle methods (dc6a52f2)
• perf(core): split call into raw _stream() + collector wrapper at the API boundary (ddab93c3)
• test(core): pin exact event-stream shapes for tools, agents, workflows (bbe5917e)
• perf(core): fast paths for non-streaming handlers, approvals-off, and single-tool dispatch (889852f6)
• perf(core): cut framework overhead 2-4x across agent and workflow hot paths (9d299cbb)

Full Changelog: https://github.com/timbal-ai/timbal/compare/v2.3.5...v2.4.0