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Abhinav 8228e9b867 Resolve token budgets from each step's active model (#41162 )

## Why

Model settings can change between steps in the same turn. Token-budget defaults,
context-window limits, and model-visible guidance need to stay aligned with the
model captured for each step.

## What changed

- Preserve the turn's original token-budget preferences and resolve model-owned
  defaults when each `StepContext` is created.
- Use the step's model to determine context-window availability and token-budget
  guidance, while keeping explicit user settings unchanged.
- Emit one-time replacement or removal notices when context-window guidance
  changes, including compatibility with previously persisted world-state
  snapshots.
- Add `ModelInfo::usable_context_window()` to distinguish reserved-headroom
  capacity from the resolved context window and auto-compaction limit.

## Testing

- Cover mid-turn model switches with model defaults, explicit settings, config
  reloads, missing context windows, and missing destination guidance.
- Cover unchanged, replaced, removed, blank, and legacy guidance transitions.

GitOrigin-RevId: 91100a9f3625bef8a79ecd158eb028051c309eee

2026-08-27 15:01:22 +00:00

src

Resolve token budgets from each step's active model (#41162 )

2026-08-27 15:01:22 +00:00

BUILD.bazel

build: run buildifier from just fmt (#28125 )

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

Cargo.toml

Sanitize credentials from Git remote metadata (#40713 )

2026-08-25 21:34:05 +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.