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edge case

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This commit is contained in:
Charles Cunningham
2026-02-18 02:22:07 -08:00
parent 6901781b75
commit ca84df34b8
1 changed files with 49 additions and 1 deletions
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50
codex-rs/core/src/compact.rs
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@@ -378,7 +378,7 @@ pub(crate) fn process_compacted_history(
/// - prefer the last real (non-summary) user message;
/// - otherwise fall back to the last summary user message.
///
/// If no user anchor exists, this is a no-op.
/// If no user anchor exists, append initial context at the end.
pub(crate) fn insert_initial_context_before_last_user_anchor(
compacted_history: &mut Vec<ResponseItem>,
initial_context: Vec<ResponseItem>,
@@ -396,6 +396,8 @@ pub(crate) fn insert_initial_context_before_last_user_anchor(
});
if let Some(index) = insertion_index {
compacted_history.splice(index..index, initial_context);
} else {
compacted_history.extend(initial_context);
}
}
@@ -1334,4 +1336,50 @@ keep me updated
];
assert_eq!(compacted_history, expected);
}
#[test]
fn insert_initial_context_before_last_user_anchor_appends_when_no_user_anchor_exists() {
let mut compacted_history = vec![ResponseItem::Message {
id: None,
role: "assistant".to_string(),
content: vec![ContentItem::OutputText {
text: "assistant only".to_string(),
}],
end_turn: None,
phase: None,
}];
let initial_context = vec![ResponseItem::Message {
id: None,
role: "developer".to_string(),
content: vec![ContentItem::InputText {
text: "fresh permissions".to_string(),
}],
end_turn: None,
phase: None,
}];
insert_initial_context_before_last_user_anchor(&mut compacted_history, initial_context);
let expected = vec![
ResponseItem::Message {
id: None,
role: "assistant".to_string(),
content: vec![ContentItem::OutputText {
text: "assistant only".to_string(),
}],
end_turn: None,
phase: None,
},
ResponseItem::Message {
id: None,
role: "developer".to_string(),
content: vec![ContentItem::InputText {
text: "fresh permissions".to_string(),
}],
end_turn: None,
phase: None,
},
];
assert_eq!(compacted_history, expected);
}
}