[chrarnoldus]

Summary

• Adds stepfun/step-5-preview-free to the preferred model list, directly above kilo-auto/free. The preferred order is now: kilo-auto/efficient, stepfun/step-5-preview-free, kilo-auto/free, then the admin-configured free models and paid preferred models.
• The model is also added to the monitored list so it stays consistent with the "monitored = concrete preferred models" rule.
• The model ID now lives in providers/stepfun.ts as STEP_5_PREVIEW_FREE_MODEL_ID, shared by the kilo-exclusive model definition and the preferred list. models.ts is client-safe and cannot import the server-only exclusive-models module, so the constant lives in the provider file.

Verification

• preferred-models.test.ts updated for the new order; openrouter-models-config.test.ts gained assertions that the StepFun model sits between kilo-auto/efficient and kilo-auto/free.
• Ran with the repo's apps/web/.env.test: openrouter-models-config, preferred-models, models, models.client-boundary, and kilo-exclusive-models suites pass (60/60).
• tsgo --noEmit for packages/web-shared passes; oxfmt --check passes on changed files; git diff --check clean.
• Broader packages/web-shared/src/lib/ai-gateway run: 1611 passed, 65 failed across 10 suites. All failures are Postgres connection errors (AggregateError / failed inserts) because Postgres is not running in this environment; not run against a DB.

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (5 files)

• apps/web/src/tests/openrouter-models-config.test.ts
• packages/web-shared/src/lib/ai-gateway/kilo-exclusive-models.ts
• packages/web-shared/src/lib/ai-gateway/models.ts
• packages/web-shared/src/lib/ai-gateway/preferred-models.test.ts
• packages/web-shared/src/lib/ai-gateway/providers/stepfun.ts

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_{Reviewed by deepseek-v4.1-flash · Input: 86.5K · Output: 16.2K · Cached: 1.2M}

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