Restrict guardian assessment parsing and circuit breaker visibility (#45680)

## What changed

Make `parse_guardian_assessment`, the rejection circuit breaker types and methods, and `AUTO_REVIEW_DENIAL_WINDOW_SIZE` crate-visible with `pub(crate)`. Update their re-exports in `guardian-reviewer` to match.

GitOrigin-RevId: 39521c7859936ebc9af570d7f1ad7b2348f3673d

codex-rs/ext/guardian-reviewer/src/assessment.rs

@@ -21,7 +21,7 @@ pub struct GuardianAssessment {
 /// wrapper so transient formatting drift fails less noisily during dogfooding.
 /// Non-JSON output is still a review failure; this is only a thin recovery path
 /// for cases where the model wrapped the JSON in extra prose.
-pub fn parse_guardian_assessment(text: Option<&str>) -> anyhow::Result<GuardianAssessment> {
+pub(crate) fn parse_guardian_assessment(text: Option<&str>) -> anyhow::Result<GuardianAssessment> {
     let Some(text) = text else {
         anyhow::bail!("guardian review completed without an assessment payload");
     };

codex-rs/ext/guardian-reviewer/src/circuit_breaker.rs

@@ -4,10 +4,10 @@ const MAX_CONSECUTIVE_CYBER_GUARDIAN_DENIALS_PER_TURN: u32 = 1;
 const MAX_CONSECUTIVE_GUARDIAN_DENIALS_PER_TURN: u32 = 3;
 const MAX_RECENT_CYBER_AUTO_REVIEW_DENIALS_PER_TURN: u32 = 1;
 const MAX_RECENT_AUTO_REVIEW_DENIALS_PER_TURN: u32 = 10;
-pub const AUTO_REVIEW_DENIAL_WINDOW_SIZE: usize = 50;
+pub(crate) const AUTO_REVIEW_DENIAL_WINDOW_SIZE: usize = 50;
 
 #[derive(Debug, Default)]
-pub struct GuardianRejectionCircuitBreaker {
+pub(crate) struct GuardianRejectionCircuitBreaker {
     turns: std::collections::HashMap<String, GuardianRejectionCircuitBreakerTurn>,
 }
 
@@ -19,7 +19,7 @@ struct GuardianRejectionCircuitBreakerTurn {
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum GuardianRejectionCircuitBreakerPolicy {
+pub(crate) enum GuardianRejectionCircuitBreakerPolicy {
     Standard,
     CyberModel,
 }
@@ -37,7 +37,7 @@ impl From<&codex_protocol::openai_models::ModelInfo> for GuardianRejectionCircui
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum GuardianRejectionCircuitBreakerAction {
+pub(crate) enum GuardianRejectionCircuitBreakerAction {
     Continue,
     InterruptTurn {
         consecutive_denials: u32,
@@ -46,11 +46,11 @@ pub enum GuardianRejectionCircuitBreakerAction {
 }
 
 impl GuardianRejectionCircuitBreaker {
-    pub fn clear_turn(&mut self, turn_id: &str) {
+    pub(crate) fn clear_turn(&mut self, turn_id: &str) {
         self.turns.remove(turn_id);
     }
 
-    pub fn record_denial(
+    pub(crate) fn record_denial(
         &mut self,
         turn_id: &str,
         policy: GuardianRejectionCircuitBreakerPolicy,
@@ -83,7 +83,7 @@ impl GuardianRejectionCircuitBreaker {
         }
     }
 
-    pub fn record_non_denial(&mut self, turn_id: &str) {
+    pub(crate) fn record_non_denial(&mut self, turn_id: &str) {
         let turn = self.turns.entry(turn_id.to_string()).or_default();
         turn.consecutive_denials = 0;
         Self::record_recent_review(turn, /*denied*/ false);

codex-rs/ext/guardian-reviewer/src/lib.rs

@@ -23,11 +23,11 @@ mod settings;
 pub use assessment::GuardianAssessment;
 pub use assessment::guardian_output_contract_prompt;
 pub use assessment::guardian_output_schema;
-pub use assessment::parse_guardian_assessment;
-pub use circuit_breaker::AUTO_REVIEW_DENIAL_WINDOW_SIZE;
-pub use circuit_breaker::GuardianRejectionCircuitBreaker;
-pub use circuit_breaker::GuardianRejectionCircuitBreakerAction;
-pub use circuit_breaker::GuardianRejectionCircuitBreakerPolicy;
+pub(crate) use assessment::parse_guardian_assessment;
+pub(crate) use circuit_breaker::AUTO_REVIEW_DENIAL_WINDOW_SIZE;
+pub(crate) use circuit_breaker::GuardianRejectionCircuitBreaker;
+pub(crate) use circuit_breaker::GuardianRejectionCircuitBreakerAction;
+pub(crate) use circuit_breaker::GuardianRejectionCircuitBreakerPolicy;
 pub use model::ReviewModel;
 pub use model::select_review_model;
 pub use outcome::GuardianReviewError;