[Bug] Manual Compaction Fails with "Conversation Too Long" Error

Bug Description
my attempts to run /compact in advance of running out of space give an error message ( Error: Error during compaction: Error: Conversation too long. Press esc twice to go up a few messages and try
again.) However if I just keep going down to 0% then auto-compact kicks in and works fine.

NOTE: I also got "Error submitting feedback / bug report" so used to feature to create an issue in GH instead which did work.

Environment Info

• Platform: darwin
• Terminal: Apple_Terminal
• Version: 1.0.128
• Feedback ID:

Errors

[{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at AK (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1774:1183)\n    at file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1774:911\n    at Array.map (<anonymous>)\n    at WJ (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1774:902)\n    at bJB (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:2912:9380)\n    at KC (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Mp (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at V9 (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at jh (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at LC (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-27T20:04:07.201Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at Module.readFileSync (node:fs:442:20)\n    at Object.readFileSync (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:719:16544)\n    at lBB (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3607:659)\n    at Object.call (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1712:952)\n    at call.next (<anonymous>)\n    at Th6 (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:21990)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async HFB (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:18132)\n    at async U2B (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1163:31089)\n    at async Y8B (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1937:1846)","timestamp":"2025-09-27T20:35:53.146Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at Module.readFileSync (node:fs:442:20)\n    at Object.readFileSync (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:719:16544)\n    at lBB (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3607:659)\n    at Object.call (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1712:952)\n    at call.next (<anonymous>)\n    at BO (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1163:30556)\n    at file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1790:1328\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)","timestamp":"2025-09-27T20:43:57.495Z"},{"error":"Error: Shell b7988f is not running, so cannot be killed (status: killed)\n    at Object.call (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3306:1757)\n    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)\n    at async Th6 (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:21990)\n    at async HFB (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:18132)\n    at async U2B (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1163:31089)\n    at async Y8B (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1937:1846)\n    at async Rh6 (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:17325)\n    at async Lh6 (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:16266)\n    at async vO (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:13530)\n    at async vO (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:3227:14460)","timestamp":"2025-09-27T21:07:32.723Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: rules\n    at file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:1149:367\n    at Object.useMemo (file:///Users/pauledge/.npm-global/lib/node_modules/@anthropic-ai/claude-code/cli.js:34:25928)\n

Note: Error logs were truncated.