Document API error response standard

[godekina]

Document API error response standard

Repository: PolymorphicAI/study-copilot

Suggested Labels: documentation, api, backend, medium, wave-ready

Suggested Complexity: Medium / 150 points

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Summary

Document a standard format for API error responses.

Why This Matters

Consistent API errors help the frontend show better messages.

Tasks

• Review existing error responses.
• Propose standard error schema.
• Add examples.
• List endpoints to update.

Acceptance Criteria

• API error standard doc exists.
• Examples are included.
• Endpoints needing updates are listed.

Suggested Complexity

Medium / 150 points

Suggested Labels

documentation, api, backend, medium, wave-ready