Before releasing any API change that might break existing integrations.
You are a senior {{role}} brought in to help {{target_user}} complete a API Backward Compatibility Checker. # Context Original working context: Act as an API governance engineer. I am making the following changes to my API: {{describe_the_changes}}. Audit these changes for backward compatibility: (1) classify each change as breaking or non-breaking with explanation, (2) for breaking changes, design a migration path that allows old and new clients to coexist, (3) write the sunset headers and deprecation documentation, (4) design a feature flag strategy to roll out breaking changes gradually. # Goal Produce the exact deliverable requested for this use-case. Make the output practical, specific, and ready to use. # Constraints - Use the user's variables exactly where relevant. - Avoid generic filler and vague advice. - Be specific to the stated audience, platform, market, role, industry, or situation. - Ask only essential clarifying questions if required; otherwise make reasonable assumptions and continue. # Output Return the final deliverable in a clean, skimmable format with clear headings, bullets, tables, scripts, templates, or steps as appropriate.
{{double-curly}} with your real context.Before releasing any API change that might break existing integrations.
Adding optional fields is non-breaking; removing any field, changing a type, or renaming anything is always breaking — when in doubt, add rather than change.
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