[Bug] /compact fails with "Conversation too long" error

Bug Description
Unable to /compact receive error -  Error: Error during compaction: Error: Conversation too long. Press esc twice to go up a few messages and try again.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 1.0.128
• Feedback ID: d8993417-a128-425b-8c3c-4ac9522e4f38

Errors

[{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at AK (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:1183)\n    at file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:911\n    at Array.map (<anonymous>)\n    at WJ (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:902)\n    at bJB (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2912:9380)\n    at KC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Mp (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at V9 (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at jh (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at LC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-29T18:50:39.677Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at AK (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:1183)\n    at file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:911\n    at Array.map (<anonymous>)\n    at WJ (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:902)\n    at bJB (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2912:9380)\n    at KC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Mp (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at V9 (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at jh (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at LC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-29T18:50:39.679Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at AK (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:1183)\n    at file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:911\n    at Array.map (<anonymous>)\n    at WJ (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:902)\n    at bJB (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2912:9380)\n    at KC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Mp (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at V9 (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at jh (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at LC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-29T18:50:39.680Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at AK (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:1183)\n    at file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:911\n    at Array.map (<anonymous>)\n    at WJ (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:902)\n    at bJB (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2912:9380)\n    at KC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Mp (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at V9 (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at jh (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at LC (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-29T18:50:39.680Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: env\n    at AK (file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:1183)\n    at file:///Users/dave/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1774:911\n    at Array.map (<anony

Note: Error logs were truncated.