codex

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jif-oai 3cf6f08da5 session: keep startup prewarm aligned with resolved multi-agent runtime (#25841 )

## Why

Follow-up to #25722. Startup prewarm builds a preview `TurnContext`
before the first real turn so it can precompute the initial prompt and
tool surface. After the per-thread runtime work landed, that preview
path still recomputed multi-agent mode from `model_info` and feature
defaults instead of reusing the runtime the session had already resolved
from persisted metadata or inheritance.

That could leave the prewarmed session primed for a different
multi-agent mode than the first real turn, which is especially risky
because collaboration tool exposure depends on
`turn_context.multi_agent_version`.

## What changed

- In the `TurnMultiAgentRuntime::Preview` path, prefer
`Session::multi_agent_version()` when it is already known.
- Only fall back to `model_info.multi_agent_version` and feature
defaults when the session has not resolved a runtime yet.
- Keep preview mode read-only: this still avoids storing a runtime
during startup prewarm.

## Testing

- Not run (small runtime-selection follow-up)

3cf6f08da5 · 2026-06-02 14:35:26 +02:00

History

snapshots

Defer v1 multi-agent tools behind tool search (#23144 )

2026-05-19 15:04:35 +02:00

tests

Resolve per-thread multi-agent runtime (#25722 )

2026-06-02 14:31:00 +02:00

config_lock.rs

[codex] Remove experimental instructions file config (#22724 )

2026-05-14 18:04:26 -07:00

handlers.rs