Remove Perplexity partner provider

[chrarnoldus]

Summary

• remove percentage-routed Perplexity Kimi K3 inference and managed fallback retries
• remove the partner routing configuration, admin controls, environment entry, and Perplexity pricing entry
• retain generic fallback-only custom pricing support
• retain unrelated Perplexity BYOK, embeddings, and web-search support
• discard obsolete partner percentages when parsing persisted gateway configuration

Testing

• CI only, as requested

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

Incremental review at 4120119e8aec260decd3fdc6d9451d39150bda6d (new commit "fix(ai-gateway): avoid disabling Kimi K3 thinking") found no issues: removing moonshotai/kimi-k3 from applyAnthropicThinkingDefault's defaultsToThinking is matched by the updated test expectation, and no other code or test still assumes Kimi K3 gets thinking: { type: 'disabled' }.

Verification Notes

• applyAnthropicThinkingDefault now defaults thinking only for minimax/*m3* and z-ai/glm-5.2; the Kimi K3 branch is gone with no dangling references.
• The test suite was updated consistently: Kimi K3 moved from the "disables implicit thinking" case to the "does not add thinking" case at apply-provider-specific-logic.test.ts:96, and z-ai/glm-5.1 / moonshotai/kimi-k3-fast still cover the no-op path.
• No other test or call site (apply-provider-specific-logic.ts:350) asserts Kimi-K3 thinking-disabled behavior; the Kimi references in providers/vercel/index.test.ts are unrelated to thinking defaults.
• isKimiModel and applyMoonshotModelSettings remain imported and used for Kimi request handling at lines 153 and 338, so removing the thinking default does not orphan imports.

Files Reviewed (2 files)

• apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.ts
• apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.test.ts

Previous Review Summaries (2 snapshots, latest commit e04a620)

Current summary above is authoritative. Previous snapshots are kept for context only.

Previous review (commit e04a620)

Status: No Issues Found | Recommendation: Merge

Executive Summary

Incremental review at e04a6209863298ff6b4de4b1180f30e7720c6669 (new commit "fix(ai-gateway): pin Kimi thinking default") found no issues: the Kimi thinking default is now pinned to the literal moonshotai/kimi-k3, equal to the deleted PERPLEXITY_KIMI_PUBLIC_ID, and no removed partner symbols or obsolete config keys remain referenced anywhere in the changed code.

Verification Notes

• The pinned literal moonshotai/kimi-k3 matches KIMI_CURRENT_MODEL_ID in providers/moonshotai.ts:14, so applyAnthropicThinkingDefault behavior is unchanged while no longer depending on a mutable constant.
• KIMI_CURRENT_MODEL_ID import removal is safe: the file still uses isKimiModel and applyMoonshotModelSettings, which remain imported and used at lines 153 and 339.
• No remaining references to perplexity_routing_percentage, DEFAULT_PERPLEXITY_PERCENTAGE, getPercentageRoutedPartnerProvider, PERPLEXITY_KIMI_PUBLIC_ID, PERPLEXITY_KIMI_PROVIDER, or partnerPricingByModelId outside the intentional compatibility test in gateway-config.test.ts:117.
• apps/web/src/app/api/openrouter/[...path]/route.ts has no leftover partnerFallback, partnerProvider, warnExceptInTest, or getPercentageRoutedPartnerProvider references; after( remains used elsewhere.
• RoutingContent.tsx removed all Perplexity state, handlers, and copy with no dangling references; GatewayConfigSchema strips the obsolete key for pre-existing persisted JSON.
• Removed clone()/body.cancel() fallback code introduces no memory leaks.

Files Reviewed (24 files)

• ENVIRONMENT.md
• apps/web/src/app/admin/gateway/RoutingContent.tsx
• apps/web/src/app/api/openrouter/[...path]/route.test.ts
• apps/web/src/app/api/openrouter/[...path]/route.ts
• apps/web/src/lib/ai-gateway/custom-pricing.test.ts
• apps/web/src/lib/ai-gateway/custom-pricing.ts
• apps/web/src/lib/ai-gateway/gateway-config.test.ts
• apps/web/src/lib/ai-gateway/gateway-config.ts
• apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.test.ts
• apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.ts
• apps/web/src/lib/ai-gateway/providers/partner/constants.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/pricing.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/providers.test.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/providers.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/routing.test.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/routing.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/provider-definitions.test.ts
• apps/web/src/lib/ai-gateway/providers/routing-config.ts
• apps/web/src/lib/ai-gateway/providers/routing-percentage.ts
• apps/web/src/lib/ai-gateway/providers/types.ts
• apps/web/src/lib/ai-gateway/providers/vercel/index.test.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.test.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.ts
• apps/web/src/routers/admin/gateway-config-router.ts

Previous review (commit 8d8a3d9)

Status: No Issues Found | Recommendation: Merge

Executive Summary

This PR cleanly removes the percentage-routed Perplexity partner provider; I verified that all removed symbols, config fields, and provider IDs have no remaining references and that the fallbackOnly removal does not change behavior for surviving custom-pricing models.

Files Reviewed (24 files)

• ENVIRONMENT.md
• apps/web/src/app/admin/gateway/RoutingContent.tsx
• apps/web/src/app/api/openrouter/[...path]/route.test.ts
• apps/web/src/app/api/openrouter/[...path]/route.ts
• apps/web/src/lib/ai-gateway/custom-pricing.test.ts
• apps/web/src/lib/ai-gateway/custom-pricing.ts
• apps/web/src/lib/ai-gateway/gateway-config.test.ts
• apps/web/src/lib/ai-gateway/gateway-config.ts
• apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.test.ts
• apps/web/src/lib/ai-gateway/providers/apply-provider-specific-logic.ts
• apps/web/src/lib/ai-gateway/providers/partner/constants.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/pricing.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/providers.test.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/providers.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/routing.test.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/partner/routing.ts (deleted)
• apps/web/src/lib/ai-gateway/providers/provider-definitions.test.ts
• apps/web/src/lib/ai-gateway/providers/routing-config.ts
• apps/web/src/lib/ai-gateway/providers/routing-percentage.ts
• apps/web/src/lib/ai-gateway/providers/types.ts
• apps/web/src/lib/ai-gateway/providers/vercel/index.test.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.test.ts
• apps/web/src/lib/ai-gateway/rewriteModelResponse.ts
• apps/web/src/routers/admin/gateway-config-router.ts

Verification Notes

• No remaining references to PERPLEXITY_KIMI_PUBLIC_ID, PERPLEXITY_KIMI_PROVIDER, partnerPricingByModelId, getPercentageRoutedPartnerProvider, PercentageRoutedPartnerInput, RoutingCohort, perplexity_routing_percentage, or DEFAULT_PERPLEXITY_PERCENTAGE anywhere in apps, packages, or services.
• KIMI_CURRENT_MODEL_ID resolves to moonshotai/kimi-k3, the same value as the deleted PERPLEXITY_KIMI_PUBLIC_ID, so the thinking-default behavior in apply-provider-specific-logic.ts:223 is unchanged.
• CustomPricing.fallbackOnly had no remaining producers after partner pricing was deleted, so the simplified checks in custom-pricing.ts and rewriteModelResponse.ts:937 are behavior-preserving. processUsage.ts:1207 reads the separate KiloExclusivePricing.fallbackOnly, unaffected by this change.
• Removed after(...), clone(), and body.cancel() fallback code does not introduce memory leaks; after and GatewayRequest remain used elsewhere in route.ts.
• PERPLEXITY_API_KEY had no remaining code or dotenv references, so the ENVIRONMENT.md removal is consistent, while BYOK, embedding, and web-search Perplexity usages are unrelated and retained.

---

_{Reviewed by deepseek-v4.1-flash · Input: 0 · Output: 0 · Cached: 0}

_{Review guidance: REVIEW.md from base branch main}