Keep the AI coding stack current and agents bounded

An agent-tool upgrade can change how instructions load, which tools are available or how an approval behaves. Updating the version number alone does not establish that the repository’s existing workflow still works. Keep the upgrade and its verification evidence together so a reviewer can compare the before and after behavior.

Choose a small regression set

Use tasks that exercise the boundaries your team relies on. One can be an ordinary source edit with an existing behavior test. Another can require the client to load a nested instruction file. A third should attempt a denied action against synthetic data in a disposable environment.

Record the old and new tool versions, relevant configuration and observed results. Do not point a permission probe at production resources. The test should show whether the configured boundary works, without making a failed boundary test itself a production incident.

Check tools and instructions separately

A rule file says what the agent should do. A sandbox, permission setting or blocking hook can constrain what it can do. An upgrade may affect either side, so a correct answer to a prompt is not enough to verify enforcement.

For an MCP integration, compare the tool list and credentials before and after the upgrade. Confirm that a read-only task has not acquired write access and that a tool failure is reported clearly. Record the integration owner and the way access can be revoked.

For instructions, ask the agent to identify the applicable repository guidance and then inspect the resulting diff. If it cites the right file but ignores its scope, the citation alone is not a pass.

Keep the evidence with the upgrade

Attach each task’s changed paths, verification command, exit result and unresolved findings to the upgrade PR. Keep durable commands and conventions in AGENTS.md or the relevant client rules; keep run transcripts with the task that produced them.

A reviewer should be able to answer whether ordinary work still succeeds, whether a prohibited operation still fails, and whether the new tool behavior requires a configuration change. If one of those remains unknown, narrow the rollout until it can be tested. A passing demo is useful evidence about that demo, not blanket approval for every repository.

Updated 21 September 2026: replaced repeated governance templates with an upgrade-specific regression exercise and removed unsupported adoption guarantees.