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## Why Once the repo-local lint exists, `codex-rs` needs to follow the checked-in convention and CI needs to keep it from drifting. This commit applies the fallback `/*param*/` style consistently across existing positional literal call sites without changing those APIs. The longer-term preference is still to avoid APIs that require comments by choosing clearer parameter types and call shapes. This PR is intentionally the mechanical follow-through for the places where the existing signatures stay in place. After rebasing onto newer `main`, the rollout also had to cover newly introduced `tui_app_server` call sites. That made it clear the first cut of the CI job was too expensive for the common path: it was spending almost as much time installing `cargo-dylint` and re-testing the lint crate as a representative test job spends running product tests. The CI update keeps the full workspace enforcement but trims that extra overhead from ordinary `codex-rs` PRs. ## What changed - keep a dedicated `argument_comment_lint` job in `rust-ci` - mechanically annotate remaining opaque positional literals across `codex-rs` with exact `/*param*/` comments, including the rebased `tui_app_server` call sites that now fall under the lint - keep the checked-in style aligned with the lint policy by using `/*param*/` and leaving string and char literals uncommented - cache `cargo-dylint`, `dylint-link`, and the relevant Cargo registry/git metadata in the lint job - split changed-path detection so the lint crate's own `cargo test` step runs only when `tools/argument-comment-lint/*` or `rust-ci.yml` changes - continue to run the repo wrapper over the `codex-rs` workspace, so product-code enforcement is unchanged Most of the code changes in this commit are intentionally mechanical comment rewrites or insertions driven by the lint itself. ## Verification - `./tools/argument-comment-lint/run.sh --workspace` - `cargo test -p codex-tui-app-server -p codex-tui` - parsed `.github/workflows/rust-ci.yml` locally with PyYAML --- * -> #14652 * #14651
codex-core config loader
This module is the canonical place to load and describe Codex configuration layers (user config, CLI/session overrides, managed config, and MDM-managed preferences) and to produce:
- An effective merged TOML config.
- Per-key origins metadata (which layer “wins” for a given key).
- Per-layer versions (stable fingerprints) used for optimistic concurrency / conflict detection.
Public surface
Exported from codex_core::config_loader:
load_config_layers_state(codex_home, cwd_opt, cli_overrides, overrides, cloud_requirements) -> ConfigLayerStackConfigLayerStackeffective_config() -> toml::Valueorigins() -> HashMap<String, ConfigLayerMetadata>layers_high_to_low() -> Vec<ConfigLayer>with_user_config(user_config) -> ConfigLayerStack
ConfigLayerEntry(one layer’s{name, config, version, disabled_reason};namecarries source metadata)LoaderOverrides(test/override hooks for managed config sources)merge_toml_values(base, overlay)(public helper used elsewhere)
Layering model
Precedence is top overrides bottom:
- MDM managed preferences (macOS only)
- System managed config (e.g.
managed_config.toml) - Session flags (CLI overrides, applied as dotted-path TOML writes)
- User config (
config.toml)
Layers with a disabled_reason are still surfaced for UI, but are ignored when
computing the effective config and origins metadata. This is what
ConfigLayerStack::effective_config() implements.
Typical usage
Most callers want the effective config plus metadata:
use codex_core::config_loader::{load_config_layers_state, LoaderOverrides};
use codex_utils_absolute_path::AbsolutePathBuf;
use toml::Value as TomlValue;
let cli_overrides: Vec<(String, TomlValue)> = Vec::new();
let cwd = AbsolutePathBuf::current_dir()?;
let layers = load_config_layers_state(
&codex_home,
Some(cwd),
&cli_overrides,
LoaderOverrides::default(),
None,
).await?;
let effective = layers.effective_config();
let origins = layers.origins();
let layers_for_ui = layers.layers_high_to_low();
Internal layout
Implementation is split by concern:
state.rs: public types (ConfigLayerEntry,ConfigLayerStack) + merge/origins convenience methods.layer_io.rs: readingconfig.toml, managed config, and managed preferences inputs.overrides.rs: CLI dotted-path overrides → TOML “session flags” layer.merge.rs: recursive TOML merge.fingerprint.rs: stable per-layer hashing and per-key origins traversal.macos.rs: managed preferences integration (macOS only).