refactor: DRY; surface truncated AGENTS.md status via shared project-doc helper

Author: guidedways

codex-rs/core/src/project_doc.rs

@@ -15,6 +15,7 @@
 
 use crate::config::Config;
 use dunce::canonicalize as normalize_path;
+use std::fs;
 use std::path::PathBuf;
 use tokio::io::AsyncReadExt;
 use tracing::error;
@@ -178,6 +179,36 @@ pub fn discover_project_doc_paths(config: &Config) -> std::io::Result<Vec<PathBu
     Ok(found)
 }
 
+/// Returns `true` when the concatenated docs would exceed `max_bytes`, matching
+/// the truncation logic used while embedding project documentation.
+pub fn docs_truncated(paths: &[PathBuf], max_bytes: usize) -> bool {
+    if paths.is_empty() {
+        return false;
+    }
+    if max_bytes == 0 {
+        return true;
+    }
+
+    let mut remaining = max_bytes as u64;
+    for path in paths {
+        if remaining == 0 {
+            return true;
+        }
+        let size = match fs::metadata(path) {
+            Ok(meta) => meta.len(),
+            Err(_) => continue,
+        };
+        if size == 0 {
+            continue;
+        }
+        if size > remaining {
+            return true;
+        }
+        remaining = remaining.saturating_sub(size);
+    }
+    false
+}
+
 fn candidate_filenames<'a>(config: &'a Config) -> Vec<&'a str> {
     let mut names: Vec<&'a str> =
         Vec::with_capacity(2 + config.project_doc_fallback_filenames.len());

codex-rs/tui/src/status/helpers.rs

@@ -6,9 +6,8 @@ use codex_app_server_protocol::AuthMode;
 use codex_core::AuthManager;
 use codex_core::config::Config;
 use codex_core::project_doc::discover_project_doc_paths;
-use std::fs;
+use codex_core::project_doc::docs_truncated;
 use std::path::Path;
-use std::path::PathBuf;
 use unicode_width::UnicodeWidthStr;
 
 use super::account::StatusAccountDisplay;
@@ -89,40 +88,6 @@ pub(crate) fn compose_agents_summary(config: &Config) -> (String, bool) {
     }
 }
 
-/// Replicates the truncation logic in `project_doc::read_project_docs` by
-/// walking the resolved doc paths and tracking how much of the configured
-/// budget remains. Returns `true` when any file would exceed the budget (or
-/// when the budget is zero but docs exist), signaling that the TUI should warn
-/// the user in `/status`.
-fn docs_truncated(paths: &[PathBuf], max_bytes: usize) -> bool {
-    if paths.is_empty() {
-        return false;
-    }
-    if max_bytes == 0 {
-        // Docs exist but embedding disabled entirely.
-        return true;
-    }
-
-    let mut remaining = max_bytes as u64;
-    for path in paths {
-        if remaining == 0 {
-            return true;
-        }
-        let size = match fs::metadata(path) {
-            Ok(meta) => meta.len(),
-            Err(_) => continue,
-        };
-        if size == 0 {
-            continue;
-        }
-        if size > remaining {
-            return true;
-        }
-        remaining = remaining.saturating_sub(size);
-    }
-    false
-}
-
 pub(crate) fn compose_account_display(auth_manager: &AuthManager) -> Option<StatusAccountDisplay> {
     let auth = auth_manager.auth()?;