VSCode Extension: Interaction Mode Unexpectedly Switched to CLI-Only

Bug Description
for months, claude code in vs code has been working great. new files are created in a vs code tab. edits are done in a vs code tab. diffs are done in two adjacent juxtaposed vs code tabs. today, everything want to be done via the CLI. I have restarted everything. I have disabled claude extension. I have restarted vs code. I have re-enabled the extension. I have navigated to my home directory to just ensure I had chosen to use vs code inthe config settings (I had). Nothing is fixing this. I am up to date on the claude code version, as well. this is awful. very cumbersome!!!

Environment Info

• Platform: linux
• Terminal: vscode
• Version: 1.0.56
• Feedback ID: e950f710-a196-4e50-869d-45257e463db3

Errors

[{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at IW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:1184)\n    at file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:912\n    at Array.map (<anonymous>)\n    at DW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:903)\n    at THB (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:2334:7353)\n    at aq (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:19804)\n    at Fy (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:42569)\n    at Gy (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38118)\n    at IO (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38046)\n    at VN (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:37900)","timestamp":"2025-07-21T22:26:32.099Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at IW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:1184)\n    at file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:912\n    at Array.map (<anonymous>)\n    at DW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:903)\n    at THB (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:2334:7353)\n    at aq (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:19804)\n    at Fy (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:42569)\n    at Gy (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38118)\n    at IO (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38046)\n    at VN (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:37900)","timestamp":"2025-07-21T22:26:32.113Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at IW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:1184)\n    at file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:912\n    at Array.map (<anonymous>)\n    at DW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:903)\n    at THB (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:2334:7353)\n    at aq (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:19804)\n    at Fy (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:42569)\n    at Gy (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38118)\n    at IO (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38046)\n    at VN (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:37900)","timestamp":"2025-07-21T22:26:32.116Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at IW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:1184)\n    at file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:912\n    at Array.map (<anonymous>)\n    at DW (file:///home/user1/.nvm/versions/node/v22.13.1/lib/node_modules/@anthropic-ai/claude-code/cli.js:1423:903)\n    at THB (file:///home/user1/.nvm/versions

Note: Error logs were truncated.