[Bug] Unintended Code Modifications During Incremental Development

Bug Description
claude really enjoys just going off and doing random shit, like all the sudden deciding when i tell it to add one function that it should then start deleting others. I spend a ridiculous amount of time cleaning up claude's mess. Y'all gotta get working on the instruction following.

Environment Info

• Platform: linux
• Terminal: cursor
• Version: 1.0.126
• Feedback ID: ee842bf1-c0f1-44b4-98be-292f7da7cd15

Errors

[{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at rF (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1814:1184)\n    at file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1814:912\n    at Array.map (<anonymous>)\n    at FI (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1814:903)\n    at AYB (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2912:9412)\n    at HC (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Tp (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at K9 (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at yh (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at OC (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-26T15:12:47.149Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at rF (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1814:1184)\n    at file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1814:912\n    at Array.map (<anonymous>)\n    at FI (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1814:903)\n    at AYB (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2912:9412)\n    at HC (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:34:19415)\n    at Tp (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:42814)\n    at K9 (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38355)\n    at yh (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38283)\n    at OC (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:38137)","timestamp":"2025-09-26T15:14:23.781Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at Module.readSync (node:fs:744:3)\n    at Object.readSync (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:719:16677)\n    at zI (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3619:270)\n    at AK (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3621:475)\n    at Ih6 (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3247:7465)\n    at K (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3247:6673)\n    at file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3247:6991\n    at eY (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:21536)\n    at vK (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:41119)\n    at file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:39310","timestamp":"2025-09-26T16:13:12.432Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at Object.readSync (node:fs:744:3)\n    at tryReadSync (node:fs:444:20)\n    at Module.readFileSync (node:fs:490:19)\n    at Object.readFileSync (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:719:16504)\n    at AK (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3621:490)\n    at Ih6 (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3247:7465)\n    at K (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3247:6673)\n    at file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3247:6991\n    at eY (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:21536)\n    at vK (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:36:41119)","timestamp":"2025-09-26T16:13:12.432Z"},{"error":"Error: EISDIR: illegal operation on a directory, read\n    at Object.readSync (node:fs:744:3)\n    at tryReadSync (node:fs:444:20)\n    at Module.readFileSync (node:fs:490:19)\n    at Object.readFileSync (file:///home/chris/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:719:16504)\n    at aP2 (file:///home%2

Note: Error logs were truncated.