Error response schemas

🚫 Error Semantics Pillar: Executability Moderate effort Est. cost: $0

What it means

4xx and 5xx error responses are declared with schemas.

Agents need to know what errors look like to handle them gracefully instead of crashing.

✗

responses: { '200': { ... } } // no 4xx/5xx

✓

responses: { '400': { description: 'Invalid request', content: { 'application/json': { schema: { $ref: '#/components/schemas/Error' } } } } }

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