- EffortControl/BudgetControl now return a cloned Control, so a caller holding a
Capability that shares state with the catalog cannot mutate Min/Max pointers or
the Values slice through an accessor result (CodeRabbit). Lookup already deep
-copies; this closes the accessor path too.
- Add modelregistry.ReasoningEffortMax ("max") + accept it in ValidReasoningEffort,
so the snapshot's "max" tier (e.g. gpt-5.1-codex-max, newer Anthropic) has a
constant to map to. No curated model lists it yet.
- Snapshot provenance: add a _fetched date and a regeneration recipe (documented
in catalog.go), so refreshes are reproducible/auditable.
- Document that Lookup takes the API model id (wire name), not the friendly
registry id, and that the match is exact (no case-fold/prefix-strip).
- Record the source-of-truth intent in the package doc: this catalog is the
intended authoritative source; modelregistry's name-pattern inference is demoted
to a fallback when it is wired in (a later change). Rename the `cap` builtin
shadow to `entry`.
Tests pin the accessor deep-copy isolation.
Vasanthdev2004
a454931e66