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## What changed - Add an optional `initialItems` field to `thread/realtime/start` for seeding realtime V3 session history with `user`, `developer`, and `assistant` text. - Encode the items in Frameless Bidi session bootstrap payloads for websocket and WebRTC transports while preserving existing payloads when the list is omitted or empty. - Reject non-empty initial items for V1 and V2, more than 128 items, any item over 8,192 estimated tokens, or a combined total over 8,192 estimated tokens. ## Testing - Cover protocol serialization, app-server forwarding, websocket and WebRTC payloads, empty-list compatibility, version checks, and size limits. GitOrigin-RevId: 09af367f9a07543e3f8d59b7fa5387f932dc5a6a
codex-api
Typed clients for Codex/OpenAI APIs built on top of the generic transport in codex-client.
- Hosts the request/response models and request builders for Responses and Compact APIs.
- Owns provider configuration (base URLs, headers, query params), auth header injection, retry tuning, and stream idle settings.
- Parses SSE streams into
ResponseEvent/ResponseStream, including rate-limit snapshots and API-specific error mapping. - Serves as the wire-level layer consumed by
codex-core; higher layers handle auth refresh and business logic.
Core interface
The public interface of this crate is intentionally small and uniform:
-
Responses endpoint
- Input:
ResponsesApiRequestfor the request body (model,instructions,input,tools,parallel_tool_calls, reasoning/text controls).ResponsesOptionsfor transport/header concerns (conversation_id,session_source,extra_headers,compression,turn_state).
- Output: a
ResponseStreamofResponseEvent(both re-exported fromcommon).
- Input:
-
Compaction endpoint
- Input:
CompactionInput<'a>(re-exported ascodex_api::CompactionInput):model: &str.input: &[ResponseItem]– history to compact.instructions: &str– fully-resolved compaction instructions.
- Output:
Vec<ResponseItem>. CompactClient::compact_input(&CompactionInput, extra_headers)wraps the JSON encoding and retry/telemetry wiring.
- Input:
-
Memory summarize endpoint
- Input:
MemorySummarizeInput(re-exported ascodex_api::MemorySummarizeInput):model: String.raw_memories: Vec<RawMemory>(serialized astracesfor wire compatibility).RawMemoryincludesid,metadata.source_path, and normalizeditems.
reasoning: Option<Reasoning>.
- Output:
Vec<MemorySummarizeOutput>. MemoriesClient::summarize_input(&MemorySummarizeInput, extra_headers)wraps JSON encoding and retry/telemetry wiring.
- Input:
All HTTP details (URLs, headers, retry/backoff policies, SSE framing) are encapsulated in codex-api and codex-client. Callers construct prompts/inputs using protocol types and work with typed streams of ResponseEvent or compacted ResponseItem values.