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Brent Traut d2b4d63e95 Allow deferring plain-text MCP output in thread item listings (#60390 )

## What changed

Add experimental `deferOutput.mcpToolCall` support to `thread/items/list` requests scoped to a `turnId`. Successful, completed MCP calls with nonempty, unannotated plain-text results can return empty `result.content` with `outputDeferred: true`. Clients can retrieve the saved output through `thread/items/read`; connector identity remains on the listed item.

Keep rich results, JSON or fenced text, app UI results, and built-in `codex_app` results inline. Preserve plain-text output when creating bounded previews of oversized MCP results so those previews remain eligible for deferral. Reads return the saved preview when output exceeds the 64 KiB history limit.

## Testing

Extend thread history integration coverage for independent and combined command/MCP deferral, experimental capability gating, excluded result types, connector identity, oversized previews, and retrieval of deferred items.

GitOrigin-RevId: 5c160b30a4eac2a9b70e3fa65b6dbd83e935338b

2026-11-09 12:54:12 +00:00

src

Allow deferring plain-text MCP output in thread item listings (#60390 )

2026-11-09 12:54:12 +00:00

tests/support

Route response item IDs through a shared generator (#59312 )

2026-11-04 04:02:00 +00:00

BUILD.bazel

build: run buildifier from just fmt (#28125 )

2026-06-13 21:43:39 -07:00

Cargo.toml

Protect metadata writes through macOS case aliases (#54273 )

2026-10-15 12:01:04 +00:00

README.md

fix: separate codex mcp into codex mcp-server and codex app-server (#4471 )

2025-09-30 07:06:18 +00:00

README.md

codex-protocol

This crate defines the "types" for the protocol used by Codex CLI, which includes both "internal types" for communication between codex-core and codex-tui, as well as "external types" used with codex app-server.

This crate should have minimal dependencies.

Ideally, we should avoid "material business logic" in this crate, as we can always introduce Ext-style traits to add functionality to types in other crates.