Bug Reproduction Checklist for API and CLI Issues

A bug reproduction checklist for API and CLI issues helps a developer avoid speculative patches. API and CLI failures often look obvious because the error message is visible, but the missing condition is usually around environment, permissions, input shape, version, or state. A checklist keeps the report from collapsing into “it failed once.”

Start with the execution context. For an API issue, record endpoint, method, authenticated role, relevant account or workspace state, request body, query parameters, response code, response body, and any headers that affect behavior. For a CLI issue, record the command, working directory, config file path, OS, shell, tool version, and sanitized output. Context lets another person run the same case rather than guess around it.

Next, record expected and actual behavior. The expected result should be specific enough to falsify. “Should work” is weak. “POST returns 201 with created id and the object appears in GET within the same workspace” is useful. Actual behavior should include the exact error, whether the operation partially succeeded, and whether retrying changes the result.

Then isolate the smallest input. Remove unrelated flags, optional fields, and surrounding steps until the failure is still visible. If removing a field makes the bug disappear, that field becomes part of the reproduction. If the bug only appears after a sequence of steps, record the sequence rather than pretending one command is enough.

Finally, make the reproduction double as verification. After the patch, rerun the same request or command and record the new result. A fix that cannot be checked against the original failure packet is hard to trust.

Bug Reproduction Checklist for API and CLI Issues

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