AWS Ran 1,000 Agent-Generated Tests Overnight to Break Its Own Sandbox — Here's What Failed
AI Engineer · youtube · 2026-10-12
Kevin Orellana, engineer on Amazon Bedrock AgentCore, shared a novel platform stress-testing method: wrap the code sandbox and cloud browser in an MCP server, then let a coding agent generate and run 1,000 tests across 10 domains overnight, logging results to SQLite.
- Failures found: image encoding bugs, null bytes, unreadable files, browser memory exhaustion.
- He separates interface-layer bugs (what tools return) from sandbox-layer limits (memory, file permissions, seccomp, eBPF)—sandbox limits directly decide whether an agent can finish its task.
- Methodology notes: store results in a database, not markdown files; LLM-generated tests are imperfect but effective.
- Takeaway: remotely fuzz-testing your sandbox is the best way to find these issues.
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