feat(api): expose cached model endpoints

[chrarnoldus]

Summary

• add OpenRouter-compatible per-model endpoints metadata routes, including /v1 aliases for OpenRouter and gateway
• serve endpoint metadata from the cached models_by_provider.openrouter snapshot
• normalize ordinary OpenRouter discounts and apply Kilo custom pricing to every cached endpoint using the same pricing precedence as /models
• return OpenRouter-shaped 404s for absent and forbidden free models
• add 60-second CDN caching with 60-second stale-while-revalidate for successful and 404 responses

Testing

• focused Jest route, alias, cache-header, and custom-pricing tests
• focused oxlint
• web typecheck

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Executive Summary

The latest commit adds versioned /v1 alias routes (openrouter and gateway) that re-export the canonical handler, and applies a 60s CDN cache with 60s stale-while-revalidate to both success and 404 responses, matching the PR description and the new tests exactly; no issues found in the changed lines.

Files Reviewed (5 files)

• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.test.ts
• apps/web/src/app/api/openrouter/v1/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/gateway/v1/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/gateway/models/[provider]/[model]/endpoints/route.ts (unchanged since last review)

Previous Review Summaries (4 snapshots, latest commit 6a46f90)

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

Previous review (commit 6a46f90)

Status: No Issues Found | Recommendation: Merge

Executive Summary

The latest commit adds an early 404 for forbidden free models before touching the cached metadata, matching the PR description and the new test's expectations; no issues found in the changed lines.

Files Reviewed (4 files)

• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.test.ts
• apps/web/src/lib/ai-gateway/custom-pricing.ts (unchanged since last review)
• apps/web/src/app/api/gateway/models/[provider]/[model]/endpoints/route.ts (unchanged since last review)

Previous review (commit e587585)

Status: No Issues Found | Recommendation: Merge

Files Reviewed (4 files)

• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.test.ts
• apps/web/src/lib/ai-gateway/custom-pricing.ts
• apps/web/src/app/api/gateway/models/[provider]/[model]/endpoints/route.ts (unchanged since last review)

Previous review (commit a2c85e0)

Status: No Issues Found | Recommendation: Merge

Executive Summary

The incremental change correctly extends the per-model endpoints route to undo OpenRouter pricing discounts using the existing getModelDisplayPricing helper, and the updated test's expected values match the discount math exactly.

Files Reviewed (2 files)

• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.test.ts

Previous review (commit 7e51201)

Status: No Issues Found | Recommendation: Merge

Executive Summary

Reviewed the new per-model endpoints metadata routes and their re-export/gateway alias; the implementation is consistent with existing unauthenticated OpenRouter metadata endpoints in this codebase and the test coverage matches the observable behavior.

Files Reviewed (3 files)

• apps/web/src/app/api/gateway/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.ts
• apps/web/src/app/api/openrouter/models/[provider]/[model]/endpoints/route.test.ts

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_{Reviewed by claude-sonnet-5 · Input: 22 · Output: 2.5K · Cached: 382.7K}

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