[Bug] Claude 4.5 Opus returning incomplete/partial results with degraded output quality

Bug Description
this two days Claude opus 4.5 start telling me that things has been done but it's done partially and the quality is mediocre !
we feel that claude opus got nerfed !

Environment Info

• Platform: darwin
• Terminal: cursor
• Version: 2.0.70
• Feedback ID: 9be3398f-c30d-4b42-9dcb-994cc2b836cc

Errors

[{"error":"Error: NON-FATAL: Lock acquisition failed for /Users/geeq/.local/share/claude/versions/2.0.70 (expected in multi-process scenarios)\n    at K$R (/$bunfs/root/claude:2346:2155)\n    at qDA (/$bunfs/root/claude:2346:1875)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T11:57:08.198Z"},{"error":"Error: Request was aborted.\n    at _createMessage (/$bunfs/root/claude:417:3151)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:01:24.565Z"},{"error":"Error: Request was aborted.\n    at makeRequest (/$bunfs/root/claude:750:3939)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:02:08.554Z"},{"error":"Error: 1P event logging: 18 events failed to export\n    at queueFailedEvents (/$bunfs/root/claude:161:91093)\n    at doExport (/$bunfs/root/claude:161:90204)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:02:44.395Z"},{"error":"Error: {\"message\":\"Failed to export 18 events\",\"originalLine\":\"161\",\"originalColumn\":\"90282\",\"line\":\"161\",\"column\":\"90282\",\"sourceURL\":\"/$bunfs/root/claude\",\"stack\":\"Error: Failed to export 18 events\\n    at doExport (/$bunfs/root/claude:161:90282)\\n    at processTicksAndRejections (native:7:39)\",\"name\":\"Error\"}\n    at error (/$bunfs/root/claude:1514:25198)\n    at <anonymous> (/$bunfs/root/claude:152:61266)\n    at KM0 (/$bunfs/root/claude:152:61810)\n    at <anonymous> (/$bunfs/root/claude:153:17130)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:02:44.396Z"},{"error":"Error\n    at <anonymous> (/$bunfs/root/claude:60:10672)\n    at emit (node:events:92:22)\n    at <anonymous> (/$bunfs/root/claude:59:5634)\n    at request (/$bunfs/root/claude:62:2147)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:02:51.842Z"},{"error":"Error: Timed out after waiting 15000ms\nCause: Locator.waitHandle\n    at tG_ (/$bunfs/root/claude:1027:34086)\n    at async call (unknown)\n    at async nrD (unknown)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:21:31.547Z"},{"error":"MaxFileReadTokenExceededError: File content (46943 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at cB_ (/$bunfs/root/claude:906:11975)\n    at async call (/$bunfs/root/claude:915:1005)\n    at async <anonymous> (/$bunfs/root/claude:3372:1507)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:22:06.371Z"},{"error":"MaxFileReadTokenExceededError: File content (25872 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at cB_ (/$bunfs/root/claude:906:11975)\n    at async call (/$bunfs/root/claude:915:1005)\n    at async nrD (/$bunfs/root/claude:1806:17437)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:32:43.869Z"},{"error":"MaxFileReadTokenExceededError: File content (57927 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.\n    at cB_ (/$bunfs/root/claude:906:11975)\n    at async call (/$bunfs/root/claude:915:1005)\n    at async nrD (/$bunfs/root/claude:1806:17437)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:32:44.168Z"},{"error":"Error\n    at <anonymous> (/$bunfs/root/claude:46:15227)\n    at <anonymous> (/$bunfs/root/claude:60:10250)\n    at emitError (node:events:43:23)\n    at <anonymous> (/$bunfs/root/claude:59:3466)\n    at emitError (node:events:43:23)\n    at <anonymous> (node:_http_client:248:22)\n    at processTicksAndRejections (native:7:39)\n    at request (/$bunfs/root/claude:62:2147)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:32:51.162Z"},{"error":"Error: 1P event logging: 12 events failed to export\n    at queueFailedEvents (/$bunfs/root/claude:161:91093)\n    at doExport (/$bunfs/root/claude:161:90204)\n    at processTicksAndRejections (native:7:39)","timestamp":"2025-12-16T12:32:55.563Z"},{"error":"Error: {\"message\":\"Failed to export 12 events\",\"originalLine\":\"161\",\"originalColumn\":\"90282\",

Note: Error logs were truncated.