use codex_utils_string::truncate_middle_with_token_budget;use crate::ContextualUserFragment;const MAX_ADDITIONAL_CONTEXT_VALUE_TOKENS: usize = 1_000;const ADDITIONAL_CONTEXT_END_MARKER_SUFFIX: &str = ">";const ADDITIONAL_CONTEXT_START_MARKER_PREFIX: &str = "<external_";#[derive(Debug, Clone, PartialEq, Eq)]pub struct AdditionalContextUserFragment {    key: String,    value: String,}impl AdditionalContextUserFragment {    pub fn new(key: String, value: String) -> Self {        Self { key, value }    }}impl ContextualUserFragment for AdditionalContextUserFragment {    fn role(&self) -> &'static str {        "user"    }    fn markers(&self) -> (&'static str, &'static str) {        Self::type_markers()    }    fn type_markers() -> (&'static str, &'static str) {        (            ADDITIONAL_CONTEXT_START_MARKER_PREFIX,            ADDITIONAL_CONTEXT_END_MARKER_SUFFIX,        )    }    fn matches_text(text: &str) -> bool {        let trimmed = text.trim();        let Some(rest) = trimmed.strip_prefix(ADDITIONAL_CONTEXT_START_MARKER_PREFIX) else {            return false;        };        let Some((key, value_and_close)) = rest.split_once(ADDITIONAL_CONTEXT_END_MARKER_SUFFIX)        else {            return false;        };        value_and_close.ends_with(&format!("</external_{key}>"))    }    fn body(&self) -> String {        additional_context_body(&self.key, &self.value)    }}#[derive(Debug, Clone, PartialEq, Eq)]pub struct AdditionalContextDeveloperFragment {    key: String,    value: String,}impl AdditionalContextDeveloperFragment {    pub fn new(key: String, value: String) -> Self {        Self { key, value }    }}impl ContextualUserFragment for AdditionalContextDeveloperFragment {    fn role(&self) -> &'static str {        "developer"    }    fn markers(&self) -> (&'static str, &'static str) {        Self::type_markers()    }    fn type_markers() -> (&'static str, &'static str) {        ("", "")    }    fn body(&self) -> String {        additional_context_developer_body(&self.key, &self.value)    }}fn additional_context_body(key: &str, value: &str) -> String {    let value = truncate_middle_with_token_budget(value, MAX_ADDITIONAL_CONTEXT_VALUE_TOKENS).0;    format!("{key}>{value}</external_{key}")}fn additional_context_developer_body(key: &str, value: &str) -> String {    let value = truncate_middle_with_token_budget(value, MAX_ADDITIONAL_CONTEXT_VALUE_TOKENS).0;    format!("<{key}>{value}</{key}>")}