Claude Code Extension: Fix Auto-Attach (Version 2.1.273+)

A developer published a minimal Python patcher that disables the Claude Code VS Code extension's automatic file-context attachment by nulling the argument to applySelectionUpdate in webview/index.js, preventing the <ide_opened_file> and <ide_selection> blocks from being sent. The script targets extension versions 2.1.273 and later, backs up the original file, verifies a single anchor match before writing, and is idempotent on reruns; @-mentions and drag-and-drop attachments are unaffected.

This is the latest fix for the stupid, annoying file attachment "feature" in claude code. I tested if it only is a visual fix by asking claude for the important information inside the open file in vs code. The following is the readme and python script for the fix created by claude code, using caveman plugin . Minimal patcher. Verified on anthropic.claude-code-2.1.273 . Edits webview/index.js in every installed Claude Code extension with version ≥ 2.1.273 : applySelectionUpdate $ { → applySelectionUpdate $ {/ no-auto-ctx /$=void 0; applySelectionUpdate is the only writer of session.selection , which send turns into the <ide opened file / <ide selection block. Nulling its argument means nothing is ever attached and the footer "Showing Claude your current file selection" chip never appears. @ -mentions and drag/drop attachments are unaffected. - Backup written to index.js.orig before patching never overwritten on rerun . - Refuses to write unless the anchor matches exactly once. - Idempotent: rerun skips already-patched files. - Older versions < 2.1.273 skipped. Searched dirs: ~/.vscode , ~/.vscode-oss , ~/.vscode-server , ~/.vscode-insiders . python3 patch.py Then Developer: Reload Window in VS Code. Revert: cd ~/.vscode/extensions/anthropic.claude-code-<ver /webview && mv index.js.orig index.js Update replaces the extension directory → rerun patch.py . Or disable auto-update for the extension Extensions view → gear → "Ignore Updates" . Terminal claude CLI connected to the IDE via MCP — the CLI binary builds the tag itself. bash /usr/bin/env python3 """ Disable auto-attached <ide opened file /<ide selection context in the Claude Code VS Code extension webview. Patch: applySelectionUpdate $ { - applySelectionUpdate $ {$=void 0; Only touches extensions with version = 2.1.273. Backs up to index.js.orig first. """ import glob import json import os import re import shutil import sys MIN VERSION = 2, 1, 273 MARK = "/ no-auto-ctx /" ANCHOR = re.compile r"applySelectionUpdate\ ?P<p A-Za-z0-9 $ + \ \{" EXT DIRS = "~/.vscode/extensions", "~/.vscode-oss/extensions", "~/.vscode-server/extensions", "~/.vscode-insiders/extensions", def ext version ext dir : with open os.path.join ext dir, "package.json" , encoding="utf-8" as f: v = json.load f "version" return tuple int x for x in v.split "." :3 def patch ext dir : path = os.path.join ext dir, "webview", "index.js" if not os.path.isfile path : return 0 v = ext version ext dir if v < MIN VERSION: print f" skip {'.'.join map str, v } < 2.1.273: {path}" return 0 with open path, encoding="utf-8" as f: src = f.read if MARK in src: print f" skip already patched: {path}" return 0 matches = list ANCHOR.finditer src if len matches = 1: print f" fail expected 1 anchor, found {len matches }: {path}", file=sys.stderr return 1 m = matches 0 patched = src : m.start + f"applySelectionUpdate {m.group 'p' } {{{MARK}{m.group 'p' }=void 0;" + src m.end : bak = path + ".orig" if not os.path.exists bak : shutil.copy2 path, bak with open path, "w", encoding="utf-8" as f: f.write patched print f" ok patched: {path} backup: {bak} " return 0 def main : dirs = for d in EXT DIRS: dirs.extend glob.glob os.path.join os.path.expanduser d , "anthropic.claude-code- " if not dirs: print "no claude-code extension found", file=sys.stderr return 1 return max patch d for d in sorted dirs if name == " main ": sys.exit main