From 6ebc54179f29e11308ffd649176fc00592b64bfb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=86=AF=E5=9F=BA=E9=AD=81?= <1412414664@qq.com>
Date: Sun, 7 Jun 2026 14:02:07 +0800
Subject: [PATCH] fix(lint): mark truncated parse fallbacks

---
 src/cmds/go/golangci_cmd.rs | 17 +++++++++++++++--
 src/cmds/python/ruff_cmd.rs | 15 ++++++++++++++-
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/src/cmds/go/golangci_cmd.rs b/src/cmds/go/golangci_cmd.rs
index 865b9b8b0..788705a8a 100644
--- a/src/cmds/go/golangci_cmd.rs
+++ b/src/cmds/go/golangci_cmd.rs
@@ -4,7 +4,8 @@ use crate::core::config;
 use crate::core::runner;
 use crate::core::stream::exec_capture;
 use crate::core::truncate::CAP_WARNINGS;
-use crate::core::utils::{resolved_command, truncate};
+use crate::core::utils::resolved_command;
+use crate::parser::truncate_output;
 use anyhow::Result;
 use serde::Deserialize;
 use std::collections::HashMap;
@@ -271,7 +272,7 @@ pub(crate) fn filter_golangci_json(output: &str, version: u32) -> String {
             return format!(
                 "golangci-lint (JSON parse failed: {})\n{}",
                 e,
-                truncate(output, config::limits().passthrough_max_chars)
+                truncate_output(output, config::limits().passthrough_max_chars)
             );
         }
     };
@@ -431,6 +432,18 @@ mod tests {
         assert!(result.contains("utils.go"));
     }
 
+    #[test]
+    fn test_filter_golangci_parse_failure_marks_truncated_passthrough() {
+        let long_invalid_json = "{".repeat(crate::core::config::limits().passthrough_max_chars + 20);
+        let result = filter_golangci_json(&long_invalid_json, 2);
+
+        assert!(result.contains("golangci-lint (JSON parse failed:"));
+        assert!(
+            result.contains("[RTK:PASSTHROUGH] Output truncated"),
+            "parse fallback should make truncation visible, got:\n{result}"
+        );
+    }
+
     #[test]
     fn test_compact_path() {
         assert_eq!(
diff --git a/src/cmds/python/ruff_cmd.rs b/src/cmds/python/ruff_cmd.rs
index f8a512035..2b9f55e67 100644
--- a/src/cmds/python/ruff_cmd.rs
+++ b/src/cmds/python/ruff_cmd.rs
@@ -4,6 +4,7 @@ use crate::core::config;
 use crate::core::runner;
 use crate::core::truncate::CAP_WARNINGS;
 use crate::core::utils::{resolved_command, truncate};
+use crate::parser::truncate_output;
 use anyhow::Result;
 use serde::Deserialize;
 use std::collections::HashMap;
@@ -101,7 +102,7 @@ pub fn filter_ruff_check_json(output: &str) -> String {
             return format!(
                 "Ruff check (JSON parse failed: {})\n{}",
                 e,
-                truncate(output, config::limits().passthrough_max_chars)
+                truncate_output(output, config::limits().passthrough_max_chars)
             );
         }
     };
@@ -387,6 +388,18 @@ mod tests {
         assert!(result.contains("1:8"), "line:col location missing");
     }
 
+    #[test]
+    fn test_filter_ruff_check_parse_failure_marks_truncated_passthrough() {
+        let long_invalid_json = "{".repeat(crate::core::config::limits().passthrough_max_chars + 20);
+        let result = filter_ruff_check_json(&long_invalid_json);
+
+        assert!(result.contains("Ruff check (JSON parse failed:"));
+        assert!(
+            result.contains("[RTK:PASSTHROUGH] Output truncated"),
+            "parse fallback should make truncation visible, got:\n{result}"
+        );
+    }
+
     #[test]
     fn test_filter_ruff_format_all_formatted() {
         let output = "5 files left unchanged";