[Bug] OpenCode leaks temporary .so files in /tmp, consuming hundreds of GB over time #28089

Description

Title: [Bug] OpenCode leaks temporary .so files in /tmp, consuming hundreds of GB over time

Environment

• OS: CentOS 7 / Linux x86_64
• OpenCode: latest (running May 2026)
• Shell: bash

Summary

OpenCode generates temporary ELF shared object (.so) files in /tmp and never cleans them up. Over time, this accumulates into hundreds of gigabytes of disk space consumed by orphaned files.

Reproducible Steps

1. Run OpenCode CLI for an extended period (days/weeks)
2. Observe /tmp directory

Observed Behavior

• OpenCode creates hidden .so files in /tmp with naming pattern:
  • .5fff*-00000000.so (4.3 MB each)
  • .7bef*-00000000.so (4.5 MB each)
  • .fbff*-00000000.so (4.5 MB each)
• These are ELF 64-bit LSB shared objects (file output: "ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, not stripped")
• New files are generated continuously (creation timestamps within seconds of current time)
• Old files are never deleted — they accumulate indefinitely

Impact

On one system running OpenCode:

Root Cause Analysis

Using lsof, confirmed that running .opencode processes hold these files as memory-mapped regions:

.opencode  15606 root  mem  REG ... /tmp/.7befcfab9d7f5ff9-00000000.so
.opencode  27137 root  mem  REG ... /tmp/.7bef5fffbdff7fbf-00000000.so
.opencode  72378 root  mem  REG ... /tmp/.5fffa7f6acff5fe7-00000000.so
...

This suggests OpenCode is generating JIT-compiled or dynamically-loaded shared libraries (possibly from V8 code caching or WASM compilation) but lacks any cleanup mechanism — no tmpwatch integration, no file rotation, no cleanup on process exit.

Expected Behavior

• Temporary files should be cleaned up when the process exits
• Or at minimum, a bounded number of files should be retained (e.g., LRU eviction)
• Or use a dedicated temp directory (e.g. /tmp/opencode/) that is cleaned on startup

Workaround

Added a cron job to clean old .so files daily:

0 2 * * * find /tmp -maxdepth 1 -name ".*.so" -type f -mtime +1 -delete

Plugins

No response

OpenCode version

No response

Steps to reproduce

No response

Screenshot and/or share link

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Operating System

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Terminal

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