AI agent · Security

Claude Code security checklist: hardening agentic changes before they ship

Claude Code is an agentic coding tool that edits files, runs commands, and installs packages across your real repo. It is powerful precisely because it acts on its own, and that autonomy is why agentic changes need the same security review as vibe-coded apps, plus attention to what the agent is allowed to do.

This checklist covers the highest-impact things to verify before agentic changes ship: server-side access control, secret handling, dependency provenance, and the cost of what the agent wired up.

45%

of AI-generated code ships with a known security weakness (Wiz · Databricks)

19.6%

of AI-suggested packages are hallucinated, enabling slopsquatting (arXiv 2501.19012)

The same risks, with autonomy on top

Agentic and vibe-coded apps fail in the same ways, because the code comes from the same models. The difference with an agent is that it can install a bad dependency or change a permission without a human reading the step, so the review has to assume nothing was approved by default.

  • Server-side authorization

    Confirm every protected endpoint enforces ownership on the server, not in the UI, after each change.

  • Dependency provenance

    Agents add packages autonomously. Verify each one exists, is the intended package, and is not a slopsquatting target a short edit-distance from a popular name.

  • Secret handling

    Keep keys in server-side secrets. Check that nothing was hardcoded or committed during an agent edit.

  • Command and file scope

    Apply least privilege: an agent should not have unvetted access to delete data or modify production resources.

Make the review automatic

Because an agent generates and commits quickly, point-in-time review falls behind. Run the deterministic checks on every commit so each agentic change is scored the moment it lands, the same way you would review a human pull request, only continuously.

The pre-launch checklist

  • Re-verify server-side authorization after each change

    Ownership checks survive agent edits.

  • Confirm input validation at the boundary

    Not just in the interface.

  • Vet every dependency the agent installs

    Real, intended, pinned, and not a slopsquatting lookalike.

  • Scan for hardcoded or committed secrets

    Rotate anything exposed.

  • Apply least privilege to the agent

    No unvetted access to delete or modify production resources.

  • Automate the review on every commit

    Keep pace with agentic output.

Run this checklist on your repo, automatically

PeakStack scores every commit for security, scalability, and cost - with the exact line and a fix.

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FAQ

Does code written by Claude Code need a security review?

Yes. Agentic code carries the same vulnerabilities as any AI-generated code, and the agent can install dependencies or change permissions without a human reading the step, so verify access control, secrets, and dependencies before shipping.

Is agentic coding safer than vibe coding?

No. They share the same risk profile because the code comes from the same models. Agentic tools add autonomy, which means more unreviewed decisions, so the same security, scale, and cost review applies.

How do I review agentic changes continuously?

PeakStack analyzes every commit the same way whether a human or an agent authored it, running live dependency checks and a security, scalability, and cost review with the exact file, line, and fix.

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