From 5c759d48c7e49b84f35544478d86cfe60a41b569 Mon Sep 17 00:00:00 2001
From: Tommaso Sciortino <sciortino@gmail.com>
Date: Tue, 8 Jul 2025 09:30:49 -0700
Subject: [PATCH] Don't enforce leading slash since that's not true on Windows
 (#3545)

---
 packages/core/src/tools/read-file.test.ts | 6 +++---
 packages/core/src/tools/read-file.ts      | 1 -
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/packages/core/src/tools/read-file.test.ts b/packages/core/src/tools/read-file.test.ts
index e7ff822f..96bb7680 100644
--- a/packages/core/src/tools/read-file.test.ts
+++ b/packages/core/src/tools/read-file.test.ts
@@ -74,7 +74,7 @@ describe('ReadFileTool', () => {
     it('should return error for relative path', () => {
       const params: ReadFileToolParams = { absolute_path: 'test.txt' };
       expect(tool.validateToolParams(params)).toBe(
-        `params/absolute_path must match pattern "^/"`,
+        `File path must be absolute, but was relative: test.txt. You must provide an absolute path.`,
       );
     });
 
@@ -144,10 +144,10 @@ describe('ReadFileTool', () => {
       const params: ReadFileToolParams = { absolute_path: 'relative/path.txt' };
       const result = await tool.execute(params, abortSignal);
       expect(result.llmContent).toBe(
-        'Error: Invalid parameters provided. Reason: params/absolute_path must match pattern "^/"',
+        'Error: Invalid parameters provided. Reason: File path must be absolute, but was relative: relative/path.txt. You must provide an absolute path.',
       );
       expect(result.returnDisplay).toBe(
-        'params/absolute_path must match pattern "^/"',
+        'File path must be absolute, but was relative: relative/path.txt. You must provide an absolute path.',
       );
     });
 
diff --git a/packages/core/src/tools/read-file.ts b/packages/core/src/tools/read-file.ts
index a26f50ce..dd173813 100644
--- a/packages/core/src/tools/read-file.ts
+++ b/packages/core/src/tools/read-file.ts
@@ -60,7 +60,6 @@ export class ReadFileTool extends BaseTool<ReadFileToolParams, ToolResult> {
             description:
               "The absolute path to the file to read (e.g., '/home/user/project/file.txt'). Relative paths are not supported. You must provide an absolute path.",
             type: Type.STRING,
-            pattern: '^/',
           },
           offset: {
             description: