rob thijssen
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Step 1 of the OpenAI Responses API rollout. Pure refactor — no new
endpoints, no behaviour change on the wire. Lays the seam for
emitting Responses-shaped streaming events from the same harness
output as chat completions in Step 2.
- New `neuron::wire` module tree:
- `wire::event::InferenceEvent` — format-agnostic enum
(Start, TextDelta, ReasoningDelta, Finish) the candle harness
now emits as its native streaming currency.
- `wire::event::FinishReason` — typed reason that maps cleanly
onto OpenAI `finish_reason`, OpenAI Responses `status`, and
Anthropic `stop_reason` strings.
- `wire::openai_chat::project_chat_stream` — async task that
consumes an InferenceEvent receiver and produces a
ChatCompletionChunk receiver, stamping per-request metadata
(id, created, model_id) onto every chunk. Output matches the
pre-refactor wire shape bit-for-bit.
- candle.rs refactored to emit InferenceEvent on its internal
channel through all three streaming paths (CPU
run_inference_streaming, CUDA single-GPU stream_inference_via_worker,
CUDA TP chat_completion_tp_stream). The streaming functions lost
their id/created/model_id parameters since wire-format metadata
now lives in the projector.
- emit_delta + emit_delta_blocking simplified to single-purpose
TextDelta emitters with no wire-format coupling.
- chat_completion_stream wraps the InferenceEvent receiver in
wire_chat::project_chat_stream before returning so the
/v1/chat/completions HTTP handler keeps consuming
ChatCompletionChunks unchanged. External signature preserved.
Also fixes a pre-existing helexa-acp test race (three modules each
declared their own static LOCK for HOME mutation, so cross-module
parallelism flaked tests that read HOME at runtime). Consolidated
onto a single crate-wide path_util::ENV_LOCK.
122 helexa-acp tests + 44 neuron tests pass (5 new wire projection
tests). fmt + clippy --workspace -- -D warnings clean. Ran helexa-acp
suite 3x to confirm the env race is closed.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>