- Add JSDoc to resolveCustomProviderApiType (docstring coverage + AGENTS.md
jsdoc convention) and convert the inline rationale to FNXC format.
- FNXC-format the test rationale comment.
- Strengthen the regression test per FN-5893 (fix the invariant, not the repro):
- negative assertion that no provider is ever registered with the bare
"anthropic" api key;
- assert every api key passed to registerProvider is one pi-ai's registry
actually registers, so a typo in any arm (not just anthropic) fails here.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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