feat(claude): add Claude Opus 5 to built-in models - #44
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Upstream's catalog stops at Fable 5 + Opus 4.8; claude-opus-5 exists in the Claude 5 family but has no upstream catalog entry yet, leaving it unusable in the picker except via the capability-less custom-slug path. Add it as a first-class entry (effort options + fast mode, mirroring Opus 4.8) gated on the Fable 5 minimum CLI version, since both shipped in the same Claude Code generation. Also wire the two runtime paths a new model entry interacts with (found in review): exempt claude-opus-5 from the xhigh->max older-model effort downgrade, and treat it as always-1M in selectedClaudeContextWindow like the other Opus models without a contextWindow descriptor. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Summary
Adds
claude-opus-5("Claude Opus 5") as a first-class built-in Claude model. Upstream's catalog currently stops at Fable 5 + Opus 4.8 — there is no upstream commit to pull for this (verified againstupstream/mainthrough 2026-07-23), so this is a deliberate fork divergence.BUILT_IN_MODELSentry mirroring Opus 4.8: Reasoning effort (low → ultrathink, default high) + Fast Mode togglexhigh→maxolder-model effort downgrade innormalizeClaudeCliEffort, and treated as always-1M inselectedClaudeContextWindowlike the other Opus entriesxhighnormalizationVerification
vp test run ProviderRegistry.test.ts ClaudeAdapter.test.ts— 98/98 passtsgo --noEmiton apps/server — clean🤖 Generated with Claude Code