agent-usage-guard caps Claude Code subagents near usage limits

What the research found

agent-usage-guard is a Show HN Claude Code plugin that caps subagent fan-out and refuses new agents near usage limits, requiring Claude Code v2.1.287 or later.

Claims and how well the evidence supports them

1. Requires Claude Code v2.1.287 or later 98%
2. A runaway research session spawned 394 subagent calls and consumed 5-hour usage in ten minutes 90%
3. Guard refuses new agents once a window is 95% full by default 99%
4. Stores no prompt text, tool inputs or model output and makes no network calls 98%

Evidence

• github.com https://github.com/rbartoli/agent-usage-guard

Actionability rated medium.