New_Micro_Learning/docs/api-guidelines.md

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# API Guidelines
- Base path: `/api/v1`
- JSON request and response bodies
- Resource identifiers are opaque strings
- ISO 8601 UTC timestamps at boundaries
- Locale and timezone are explicit request context
- Cursor pagination for high-volume feeds; page pagination where users need page counts
- Filter and sort fields are allow-listed
- Mutations support idempotency keys where duplicate execution is costly
## Response envelope
```json
{
"data": {},
"meta": { "requestId": "..." }
}
```
Validation errors use a stable machine code, localized user-safe message, and field errors. Authorization must not leak cross-tenant existence. Controllers delegate to application commands and queries.
## Taxonomy endpoints
`taxonomy-types`, `taxonomy-nodes`, `taxonomy-relationships`, `content-mappings`, `mapping-suggestions`, `evidence`, `capabilities`, `capability-snapshots`, `skill-expectations`, `skill-gaps`, and `content-coverage` live under `/api/v1` and are policy protected.