/insights crashes with JavaScript heap out of memory (OOM)

Bug

/insights crashes Claude Code with FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory before any assistant response is generated.

Environment

• Claude Code v2.1.32
• macOS Sequoia (Darwin 24.6.0), Apple M3 Max, 48 GB RAM
• Node 22.13.0 (via Volta)

Reproduction

1. Open Claude Code in a project
2. Run /insights
3. Crash — no assistant output, immediate OOM

Reproduces consistently (tested twice, same result).

Stack trace (key frames)

FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory

 7: v8::internal::FactoryBase<v8::internal::Factory>::NewRawTwoByteString(...)
 8: v8::internal::JsonParser<unsigned short>::MakeString(...)
 9: v8::internal::JsonParser<unsigned short>::ParseJsonValue<false>(...)
10: v8::internal::JsonParser<unsigned short>::ParseJson(...)
28: node::fs::FileHandle::CloseReq::Resolve()
29: node::fs::FileHandle::ClosePromise()::$_0::__invoke(uv_fs_s*)

The crash is in JSON.parse() of a file read via FileHandle. The GC log shows ~4 GB heap exhausted:

Mark-Compact 4094.5 (4158.3) -> 4094.5 (4174.3) MB, pooled: 0 MB, 68.71 / 0.00 ms (average mu = 0.387, current mu = 0.282) allocation failure; scavenge might not succeed

Notes

• Crash occurs during command expansion, before the assistant gets a turn (confirmed: stop hook reports "No message found for role 'assistant' in transcript")
• Different from existing /insights TypeErrors (#23697, #23431, #23138) — this is a memory exhaustion issue