[BUG] Memory is near the limit (~5.3GB used of 6.9GB max), with a high growth rate

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I launched Claude Code CLI today and immediately was told I needed to run /heapdump and report it to you

What Should Happen?

No memory leak

Error Messages/Logs

{
  "timestamp": "2026-03-12T01:41:07.428Z",
  "sessionId": "060434de-c93d-4ba3-88bd-0e0fa79da235",
  "trigger": "manual",
  "dumpNumber": 0,
  "uptimeSeconds": 31.877974375,
  "memoryUsage": {
    "heapUsed": 5307004879,
    "heapTotal": 48162816,
    "external": 5268754565,
    "arrayBuffers": 4979749691,
    "rss": 693534720
  },
  "memoryGrowthRate": {
    "bytesPerSecond": 21755921.873878475,
    "mbPerHour": 74693.03011509181
  },
  "v8HeapStats": {
    "heapSizeLimit": 6935674880,
    "mallocedMemory": 5307267285,
    "peakMallocedMemory": 693567488,
    "detachedContexts": 0,
    "nativeContexts": 1
  },
  "resourceUsage": {
    "maxRSS": 710213107712,
    "userCPUTime": 4238855,
    "systemCPUTime": 1823445
  },
  "activeHandles": 0,
  "activeRequests": 0,
  "analysis": {
    "potentialLeaks": [
      "High memory growth rate: 74693.0 MB/hour"
    ],
    "recommendation": "WARNING: 1 potential leak indicator(s) found. See potentialLeaks array."
  },
  "platform": "darwin",
  "nodeVersion": "v24.3.0",
  "ccVersion": "2.1.72"
}

Steps to Reproduce

Launched Claude with the claude command

Claude Model

Sonnet (default)

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.72

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

IntelliJ IDEA terminal

Additional Information

The snapshot file that /heapdump generated is 38.3MB