## Summary
- Add `claude-opus-4-8` to the built-in Anthropic model catalog with
pricing, limits, features, and fast-mode costs.
- Move the floating `opus` and `claude-opus` aliases from Opus 4.7 to
Opus 4.8 and update the public model table.
- Remove/generalize Rust tests that were pinned to specific built-in
Opus catalog data.
## Verification
- `cargo nextest run -p fabro-model`
- `cargo +nightly-2026-04-14 fmt --check --all`
- `git diff --check`
- `target/debug/fabro --json model test --model opus` (live Anthropic
smoke; resolved to `claude-opus-4-8`)