From 565a651a548414eede65f973c0b6519dc4a8a15c Mon Sep 17 00:00:00 2001
From: Abhinav Vedmala <abhinav@openai.com>
Date: Fri, 1 May 2026 15:39:54 -0700
Subject: [PATCH] preserve legacy PreToolUse blocks with context

---
 codex-rs/hooks/src/engine/output_parser.rs |  1 -
 codex-rs/hooks/src/events/pre_tool_use.rs  | 36 ++++++++++++++++++++++
 2 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/codex-rs/hooks/src/engine/output_parser.rs b/codex-rs/hooks/src/engine/output_parser.rs
index 4f20b1e87e..464c7f8608 100644
--- a/codex-rs/hooks/src/engine/output_parser.rs
+++ b/codex-rs/hooks/src/engine/output_parser.rs
@@ -99,7 +99,6 @@ pub(crate) fn parse_pre_tool_use(stdout: &str) -> Option<PreToolUseOutput> {
         output.permission_decision.is_some()
             || output.permission_decision_reason.is_some()
             || output.updated_input.is_some()
-            || output.additional_context.is_some()
     });
     let invalid_reason = unsupported_pre_tool_use_universal(&universal).or_else(|| {
         if use_hook_specific_decision {
diff --git a/codex-rs/hooks/src/events/pre_tool_use.rs b/codex-rs/hooks/src/events/pre_tool_use.rs
index 932f070931..39d0e61258 100644
--- a/codex-rs/hooks/src/events/pre_tool_use.rs
+++ b/codex-rs/hooks/src/events/pre_tool_use.rs
@@ -362,6 +362,42 @@ mod tests {
         );
     }
 
+    #[test]
+    fn deprecated_block_decision_with_additional_context_blocks_processing() {
+        let parsed = parse_completed(
+            &handler(),
+            run_result(
+                Some(0),
+                r#"{"decision":"block","reason":"do not run that","hookSpecificOutput":{"hookEventName":"PreToolUse","additionalContext":"remember this"}}"#,
+                "",
+            ),
+            Some("turn-1".to_string()),
+        );
+
+        assert_eq!(
+            parsed.data,
+            PreToolUseHandlerData {
+                should_block: true,
+                block_reason: Some("do not run that".to_string()),
+                additional_contexts_for_model: vec!["remember this".to_string()],
+            }
+        );
+        assert_eq!(parsed.completed.run.status, HookRunStatus::Blocked);
+        assert_eq!(
+            parsed.completed.run.entries,
+            vec![
+                HookOutputEntry {
+                    kind: HookOutputEntryKind::Context,
+                    text: "remember this".to_string(),
+                },
+                HookOutputEntry {
+                    kind: HookOutputEntryKind::Feedback,
+                    text: "do not run that".to_string(),
+                },
+            ]
+        );
+    }
+
     #[test]
     fn unsupported_permission_decision_fails_open() {
         let parsed = parse_completed(