feat: add model selection engine (APR-205)#53
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Implements the core complexity → model tier routing engine in @aprovan/devtools/model-selection. - `selectModel(input)` maps a 1-5 complexity score to the best available model, applying the priority order: free tier → subscription (prepaid quota) → paid (budget → mid-tier → frontier → premium). - `DEFAULT_CATALOG` defines routing options across OpenRouter free, OpenCode/Claude subscriptions, and paid models from Anthropic, OpenAI, and Google. - `ScoringPlugin` interface scaffolds MCP integration points for 3rd-party data sources (Artificial Analysis etc.) — data is collected but not yet weighted in selection decisions. - Returns `SelectionResult` with modelId, provider, tier, planType, optional subscriptionPlan, and human-readable reasoning. - 37 new tests covering all complexity scores, priority ordering, subscription quota gating, plugin scaffolding, and error paths. - All CI gates green: 53/53 tests, 0 type errors, 0 lint errors, build succeeds. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Summary
selectModel()in@aprovan/devtools/model-selection— maps a 1-5 complexity score to the best available modelDEFAULT_CATALOGcovers OpenRouter free models, OpenCode + Claude subscription plans, and paid models from Anthropic, OpenAI, and GoogleScoringPlugininterface scaffolds MCP injection points for 3rd-party data sources (Artificial Analysis, etc.) — data collected but not yet weightedSelectionResultwithmodelId,provider,tier,planType, optionalsubscriptionPlan, and human-readablereasoning./model-selectionsubpath export added to package.json and tsupTest plan
pnpm test)pnpm typecheck)pnpm lint)model-selection.{js,cjs,d.ts}emitted (pnpm build)Notes
quotaStateis optional; omitting it means no subscription plans are considered (all pass through to paid routing)hasAvailableQuota: true— real-time quota data will be plugged in via APR-206/APR-207Closes APR-205. Unblocks APR-206 (OpenRouter integration) and APR-207 (MCP plugin scaffold).
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