From 217feab7dea98756935bd488774cd9130332a185 Mon Sep 17 00:00:00 2001
From: Yunxiao Xu <xuyunxiao2001@gmail.com>
Date: Wed, 1 Apr 2026 23:51:41 -0700
Subject: [PATCH] Improve JSON detection: strip both ends, check matching
 brackets, use full content

---
 src/rp/detect.py | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/rp/detect.py b/src/rp/detect.py
index e439c16..fd3dc00 100644
--- a/src/rp/detect.py
+++ b/src/rp/detect.py
@@ -90,10 +90,13 @@ def detect_type(
             return EXTENSION_MAP[suffix]
 
     if content is not None:
-        stripped = content.lstrip()
-        if stripped and stripped[0] in ("{", "["):
+        stripped = content.strip()
+        if stripped and (
+            (stripped[0] == "{" and stripped[-1] == "}")
+            or (stripped[0] == "[" and stripped[-1] == "]")
+        ):
             try:
-                json.loads(stripped[:1000])
+                json.loads(stripped)
                 return "json"
             except (json.JSONDecodeError, ValueError):
                 pass