From e141fd7cd536facd3c0fafbb4fcdd388467510e4 Mon Sep 17 00:00:00 2001
From: 7Sageer <sag77r@hotmail.com>
Date: Wed, 29 Jul 2026 20:56:24 +0800
Subject: [PATCH] =?UTF-8?q?Revert=20"fix(kosong):=20match=20Kimi's=20stand?=
 =?UTF-8?q?alone=20"Unsupported=20image."=20rejection=20(=E2=80=A6"?=
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This reverts commit dbb69a2678fc9ce3d09e93598c65033378763597.
---
 .changeset/unsupported-image-standalone-rejection.md     | 5 -----
 packages/agent-core-v2/src/kosong/contract/errors.ts     | 1 -
 .../agent-core-v2/test/app/llmProtocol/errors.test.ts    | 6 ------
 packages/kosong/src/errors.ts                            | 5 -----
 packages/kosong/test/errors.test.ts                      | 9 ---------
 5 files changed, 26 deletions(-)
 delete mode 100644 .changeset/unsupported-image-standalone-rejection.md

diff --git a/.changeset/unsupported-image-standalone-rejection.md b/.changeset/unsupported-image-standalone-rejection.md
deleted file mode 100644
index 7e1af18d0c..0000000000
--- a/.changeset/unsupported-image-standalone-rejection.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-"@moonshot-ai/kimi-code": patch
----
-
-Recognize Kimi's standalone "Unsupported image." rejection so the media-stripped resend can recover stuck sessions.
diff --git a/packages/agent-core-v2/src/kosong/contract/errors.ts b/packages/agent-core-v2/src/kosong/contract/errors.ts
index ba09b783d3..7347afc47e 100644
--- a/packages/agent-core-v2/src/kosong/contract/errors.ts
+++ b/packages/agent-core-v2/src/kosong/contract/errors.ts
@@ -210,7 +210,6 @@ const IMAGE_FORMAT_PROVIDER_MESSAGE_PATTERNS = [
 
 const IMAGE_FORMAT_STATUS_MESSAGE_PATTERNS = [
   /unsupported image (?:url|format|type)/,
-  /unsupported image(?=\s*(?:[.!?]|$))/,
   /does not represent a valid image/,
   /could not (?:process|decode) (?:the |input )?image/,
   /unable to process (?:the |input )?image/,
diff --git a/packages/agent-core-v2/test/app/llmProtocol/errors.test.ts b/packages/agent-core-v2/test/app/llmProtocol/errors.test.ts
index 842a95001c..75905c1892 100644
--- a/packages/agent-core-v2/test/app/llmProtocol/errors.test.ts
+++ b/packages/agent-core-v2/test/app/llmProtocol/errors.test.ts
@@ -228,9 +228,6 @@ describe('isImageFormatError', () => {
       ),
     ).toBe(true);
     expect(isImageFormatError(new APIStatusError(400, 'unsupported image format'))).toBe(true);
-    expect(
-      isImageFormatError(new APIStatusError(400, 'Unsupported image. Please try another one.')),
-    ).toBe(true);
     expect(isImageFormatError(new APIStatusError(400, 'Unable to process input image'))).toBe(true);
     expect(
       isImageFormatError(
@@ -266,9 +263,6 @@ describe('isImageFormatError', () => {
 
   it('does not match image count/size/support errors that stripping media cannot fix', () => {
     expect(isImageFormatError(new APIStatusError(400, 'too many images in request'))).toBe(false);
-    expect(
-      isImageFormatError(new APIStatusError(400, 'unsupported image size exceeds the limit')),
-    ).toBe(false);
     expect(
       isImageFormatError(new APIStatusError(400, 'image dimension 5000 exceeds maximum 2048')),
     ).toBe(false);
diff --git a/packages/kosong/src/errors.ts b/packages/kosong/src/errors.ts
index 37752ddca5..1ad2c00742 100644
--- a/packages/kosong/src/errors.ts
+++ b/packages/kosong/src/errors.ts
@@ -272,11 +272,6 @@ const IMAGE_FORMAT_PROVIDER_MESSAGE_PATTERNS = [
 const IMAGE_FORMAT_STATUS_MESSAGE_PATTERNS = [
   // Unsupported format — OpenAI / Moonshot "unsupported image …".
   /unsupported image (?:url|format|type)/,
-  // Standalone-sentence form — Kimi "Unsupported image. …". The
-  // lookahead keeps the deliberate boundary: phrasings that continue into a
-  // qualifier ("unsupported image size …", a count/size limit) must not
-  // match, so only punctuation- or end-terminated occurrences classify.
-  /unsupported image(?=\s*(?:[.!?]|$))/,
   // Undecodable / corrupt image data.
   /does not represent a valid image/,
   /could not (?:process|decode) (?:the |input )?image/,
diff --git a/packages/kosong/test/errors.test.ts b/packages/kosong/test/errors.test.ts
index b874253410..c2ad36f898 100644
--- a/packages/kosong/test/errors.test.ts
+++ b/packages/kosong/test/errors.test.ts
@@ -585,10 +585,6 @@ describe('isImageFormatError', () => {
       ),
     ).toBe(true);
     expect(isImageFormatError(new APIStatusError(400, 'unsupported image format'))).toBe(true);
-    // Kimi standalone-sentence form (actual production message)
-    expect(
-      isImageFormatError(new APIStatusError(400, 'Unsupported image. Please try another one.')),
-    ).toBe(true);
     // Gemini
     expect(isImageFormatError(new APIStatusError(400, 'Unable to process input image'))).toBe(true);
     expect(
@@ -628,11 +624,6 @@ describe('isImageFormatError', () => {
     // model blind to the user's images — hiding the real error. They must
     // surface instead of triggering a media-stripped resend.
     expect(isImageFormatError(new APIStatusError(400, 'too many images in request'))).toBe(false);
-    // Qualifier-continuing phrasing: the standalone-sentence pattern must
-    // not swallow count/size variants of "unsupported image …".
-    expect(
-      isImageFormatError(new APIStatusError(400, 'unsupported image size exceeds the limit')),
-    ).toBe(false);
     expect(
       isImageFormatError(new APIStatusError(400, 'image dimension 5000 exceeds maximum 2048')),
     ).toBe(false);