Premise: Most “autonomous” failures are not model failures. They are infrastructure failures: a Friday demo that kept running on Monday, with no owner, no pin, no gate, and no way to stop it. This is the flip side of AI as Infrastructure.
Why anti-patterns matter more than hype lists
Strategy decks love capability. Operations care about blast radius. When an agent has tools, a bad run is an incident—not a weird chat. The patterns below show up in real programs: they look like progress until someone asks who owns the alias, what the kill switch is, or where the eval evidence lives.
Seven anti-patterns
1. The demo that escaped
A prototype agent “mostly works” in a stakeholder review. Someone leaves it pointed at a shared mailbox, a staging API that is secretly shared with prod data, or a cron that nobody turns off. Hardening is scheduled for “after we get signal.”
2. Floating model aliases
gpt-latest, claude-sonnet, or a vendor “recommended” alias in the hot path. Behavior drifts when the provider swaps weights. Your eval suite passes against last month’s model and nobody notices until tickets spike.
3. No owner, only a channel
The agent “belongs to the AI initiative.” On-call is unclear. When it misbehaves, three teams argue about prompts, platforms, and product. Autonomy without a named owner is theater.
4. No kill switch
Stopping the agent means redeploying, revoking a shared API key that also powers five other services, or asking someone to “just turn off the Zap.” There is no practiced drill.
5. Unbounded tools (and MCP with the kitchen sink)
The agent can browse, write tickets, touch production configs, and send email—“so it can be helpful.” Refusal text is treated as containment. A clever plan still reaches the dangerous tool.
6. Ship the agent, invent the eval later
Success is a screenshot, a stakeholder thumbs-up, or “it felt better this week.” Red-team notes live in a slide deck. Prod chats get pasted into GitHub “for examples.” The only gate measures jailbreaks—or nothing.
7. Swarm without orchestrator ownership
Multiple agents hand work to each other with no single plan of record, no shared budget, and no one who can explain the last decision path. “Multi-agent” becomes distributed irresponsibility.
The pattern underneath the patterns
Every anti-pattern above is a missing infrastructure expectation: pin, owner, boundary, evidence, stop. Teams do not fail because they skipped a clever prompt. They fail because they treated autonomy like a feature demo and hoped operations would appear later.
If you only fix one thing this quarter: name the owner, pin the model, add a kill switch, and refuse to promote any loop that has no eval you can re-run.
Where to go next
Get in touch if you want to pressure-test which of these is already living in your stack.