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Centralize thread MCP state in McpRuntime (#34930)

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## What changed

- Make `McpRuntime` own the published MCP configuration, connections, elicitation routing, and selected capability roots for a thread.
- Capture immutable MCP bindings for model steps and tool calls so in-flight work keeps a consistent connection set and approval authority while refreshed state is published atomically.
- Mark MCP state dirty when relevant configuration, plugins, environments, authentication, or elicitation capabilities change, then rebuild it before the next sampling request or out-of-band MCP operation.
- Separate config reloads from server invalidation: `ReloadMcpConfig` applies resolved MCP inputs, while `RefreshMcpServers` requests reinitialization from the thread's latest state.

## Testing

- Cover refreshed state visibility for existing turns, stable step bindings, current approval authority, cancelled refresh retries, resource-client reconciliation, and Apps recovery between sampling requests.

GitOrigin-RevId: 59eabb1aa8dc083426bd18ef4d3630508f376401
This commit is contained in:
jif
2026-07-23 11:22:58 +00:00
committed by copyberry
parent 39a2438d16
commit e497325a6a
54 changed files with 1792 additions and 2038 deletions
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codex-rs/core-api/src/lib.rs
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@@ -102,7 +102,6 @@ pub use codex_protocol::openai_models::ModelPreset;
pub use codex_protocol::protocol::AskForApproval;
pub use codex_protocol::protocol::EventMsg;
pub use codex_protocol::protocol::InitialHistory;
pub use codex_protocol::protocol::McpServerRefreshConfig;
pub use codex_protocol::protocol::Op;
pub use codex_protocol::protocol::SessionConfiguredEvent;
pub use codex_protocol::protocol::SessionSource;