## 1. Pricing registry

- [x] 1.1 Add `gpt-5.4-mini` pricing to the default registry and snapshot alias handling

## 2. Regression coverage

- [x] 2.1 Add unit tests for `gpt-5.4-mini` alias resolution and cost math
- [x] 2.2 Add a dashboard-trends regression covering `gpt-5.4-mini` cost summaries

## 3. Spec updates

- [x] 3.1 Add the `api-keys` requirement for `gpt-5.4-mini` pricing recognition

## 4. Verification

- [x] 4.1 Run the pricing and dashboard trend tests and `openspec validate --specs`
