8 End-to-End Agent Stack Blueprints & Day-2 Production Runbooks
Instead of stitching individual tools together from scratch, fetch a conflict-free multi-JTBD stack blueprint in one call (GET /api/blueprint?archetype=...&budget=...). Pass budget=0 to automatically swap every slot to its verified cardless/free-tier alternative.
1. Multi-JTBD Stack Blueprints (8 Archetypes)
Autonomous SWE & Coding Agent Stack
Conflict-free stack for repo-scale code generation, isolated microVM test execution, web docs grounding, and CI trajectory evals.
Claude Sonnet 4.5 / Opus 4.7 lead multi-file diff editing and tool reliability.
Instant 429/529 failover across Anthropic, OpenAI, and DeepSeek with 1 API key.
Sub-200ms Firecracker microVMs for untrusted test suites and bash tools.
Clean markdown extraction from live SDK docs without HTML token bloat.
Open-source OTel tracing + costPerSolvedTaskUsd tracking.
npm install @anthropic-ai/sdk @openrouter/ai-sdk-provider openai @e2b/code-interpreter @mendable/firecrawl-js langfuse
Sub-500ms Real-Time Voice & Telephony Agent Stack
Low-latency WebRTC/SIP voice pipeline pairing streaming STT, low-TTFT LLM routing, expressive TTS, and multi-turn persona simulation.
Sub-100ms global WebRTC mesh with native turn-detection and interruption handling.
Nova-3 streaming transcription under 250ms p95 latency.
Sub-150ms time-to-first-token keeps total voice turn latency under 500ms.
Expressive low-latency streaming audio with WebSocket chunking.
Automated adversarial caller simulation before production deploy.
npm install livekit @deepgram/sdk groq-sdk @elevenlabs/elevenlabs-js braintrust
High-Precision Production RAG & Document Intelligence Stack
Layout-aware PDF parsing, high-recall embeddings, hybrid vector + BM25 search, reranking, and faithfulness grading.
Preserves complex multi-column tables and bounding boxes for citation grounding.
Top retrieval NDCG across technical, legal, and code corpora.
Rust engine with native sparse+dense hybrid search and payload filtering.
Rerank-3.5 boosts top-5 precision before stuffing the LLM context window.
Scores context recall and answer faithfulness on every PR.
npm install reductoai voyageai @qdrant/js-client-rest cohere-ai braintrust
Stealth Web Research & Browser Action Agent Stack
Managed residential-proxy Chromium fleet, neural search grounding, markdown extraction, and captcha/WAF resilience.
Remote Playwright CDP sessions with residential proxies and session replay.
Finds canonical primary sources and technical pages with clean snippets.
Turns JS-heavy SPAs into LLM-ready markdown.
Claude Sonnet 4.5 excels at coordinate + DOM selector grounding.
npm install @browserbasehq/sdk exa-js @mendable/firecrawl-js @anthropic-ai/sdk
Serverless Autonomous SaaS & Multi-Tenant Agent Backend
Scale-to-zero Postgres with branching, durable step queues, B2B/B2C auth, and transactional email with high deliverability.
Instant copy-on-write DB branches per agent preview environment.
Retries multi-step agent runs without 15-minute serverless timeout cliffs.
Drop-in Next.js auth + B2B organization RBAC.
Clean DX, React Email templates, and instant webhook delivery events.
HTTP-native Redis for per-principal rate limiting and idempotency keys.
npm install @neondatabase/serverless inngest @clerk/nextjs resend @upstash/redis
4-Stage Agent Evaluation, Red-Team & CI Regression Stack
Complete 'Test Your Agent' harness combining public benchmarks, isolated sandboxes, pass^3 regression gates, and adversarial security probes.
Blocks PRs when pass^3 consistency or costPerSolvedTaskUsd regresses.
Captures production failures and converts them into golden eval datasets.
Runs SWE-bench Verified and Terminal-Bench tasks in clean microVMs.
Automated OWASP LLM Top-10 and jailbreak probes in GitHub Actions.
npm install braintrust langfuse @e2b/code-interpreter promptfoo
3-Layer Agentic Banking, Spend Gate & Audit Ledger Stack
Merchant-locked virtual cards, x402 micropayments, pre-purchase /api/preflight gates, and cryptographic receipt verification.
Per-agent merchant-locked virtual cards with hard webhook velocity caps.
Merchant-of-record monetization for MCP servers and agent APIs.
Extracts line-item SKU rates from vendor PDFs for ledger reconciliation.
ACID double-entry ledger storing Countersign receipts and preflight approvals.
npm install stripe @stripe/agent-toolkit @polar-sh/sdk reductoai @neondatabase/serverless
$0 Cardless Autonomous Bootstrap Stack
100% free-tier / open-source stack requiring $0 upfront spend so an autonomous agent can ship a working product immediately.
Immediate signup with free-tier open models and zero monthly platform fee.
GET https://r.jina.ai/{url} works immediately with no credit card required.
Free tier (0.5 GB storage, 100 CU-hours/mo) with no credit card required.
Free tier includes 3,000 emails/mo (100/day) with no credit card required.
50,000 free observations/mo on Hobby cloud or 100% self-hosted OSS.
npm install @openrouter/ai-sdk-provider openai cross-fetch @neondatabase/serverless resend langfuse
2. 5-Minute Provider Swap & Migration Maps (15 High-Frequency Swaps)
GET /api/swap (JSON) →| Swap Pair | Compatibility | Install Command | Code Diff & Day-2 Gotcha |
|---|---|---|---|
| openai → openrouter JTBD: llm-router (~2m) | drop_in_base_url | npm install openai@latest | const client = new OpenAI({ baseURL: "https://openrouter.ai/api/v1", apiKey: process.env.OPENROUTER_API_KEY });Gotcha: Prefix model IDs with vendor namespace (e.g. openai/gpt-5, anthropic/claude-sonnet-4-5). |
| sendgrid → resend JTBD: transactional-email (~5m) | sdk_wrapper | npm uninstall @sendgrid/mail && npm install resend | import { Resend } from "resend"; const resend = new Resend(process.env.RESEND_API_KEY); await resend.emails.send({ from, to, subject, html });Gotcha: Verify sending domain DNS (DKIM/SPF) in Resend before removing SendGrid records; default rate limit is 2 req/s (use /emails/batch for bursts). |
| pinecone → qdrant JTBD: managed-vector (~15m) | schema_migration | npm install @qdrant/js-client-rest | import { QdrantClient } from "@qdrant/js-client-rest"; const qdrant = new QdrantClient({ url: process.env.QDRANT_URL, apiKey: process.env.QDRANT_API_KEY });Gotcha: Create payload indexes on metadata filter fields in Qdrant before querying at scale. |
| puppeteer → browserbase JTBD: browser-automation (~5m) | drop_in_base_url | npm uninstall puppeteer && npm install playwright-core @browserbasehq/sdk | const browser = await chromium.connectOverCDP(`wss://connect.browserbase.com?apiKey=${process.env.BROWSERBASE_API_KEY}`);Gotcha: Always call browser.close() in a finally{} block so remote sessions terminate immediately. |
| auth0 → clerk JTBD: auth (~15m) | sdk_wrapper | npm install @clerk/nextjs | import { clerkMiddleware } from "@clerk/nextjs/server"; export default clerkMiddleware();Gotcha: Import existing user password hashes via Clerk Backend API migration endpoint to avoid forced password resets. |
| aws-rds → neon JTBD: serverless-postgres (~10m) | drop_in_base_url | npm install @neondatabase/serverless | import { neon } from "@neondatabase/serverless"; const sql = neon(process.env.DATABASE_URL!);Gotcha: Use Neon's -pooler connection string for Prisma/Drizzle in serverless environments. |
| datadog → langfuse JTBD: llm-observability (~5m) | sdk_wrapper | npm install langfuse | import { Langfuse } from "langfuse"; const lf = new Langfuse(); const trace = lf.trace({ name: "agent-run" });Gotcha: Call await lf.flushAsync() before serverless handler exit. |
| langchain → vercel-ai-sdk JTBD: agent-framework (~15m) | sdk_wrapper | npm install ai @ai-sdk/openai @ai-sdk/anthropic zod | import { generateText } from "ai"; import { anthropic } from "@ai-sdk/anthropic"; const { text } = await generateText({ model: anthropic("claude-sonnet-4-5"), prompt });Gotcha: Use maxSteps in generateText/streamText for bounded multi-step tool loops. |
| stripe-billing → polar JTBD: usage-based-billing (~10m) | sdk_wrapper | npm install @polar-sh/sdk | import { Polar } from "@polar-sh/sdk"; const polar = new Polar({ accessToken: process.env.POLAR_ACCESS_TOKEN });Gotcha: Polar acts as Merchant of Record (handles global VAT/sales tax automatically). |
| whisper-api → deepgram JTBD: speech-to-text (~5m) | sdk_wrapper | npm install @deepgram/sdk | import { createClient } from "@deepgram/sdk"; const dg = createClient(process.env.DEEPGRAM_API_KEY); const { result } = await dg.listen.prerecorded.transcribeUrl({ url }, { model: "nova-3" });Gotcha: Pass smart_format: true and diarize: true when transcribing multi-speaker meetings. |
| elevenlabs → cartesia JTBD: text-to-speech (~5m) | sdk_wrapper | npm install @cartesia/cartesia-js | import { CartesiaClient } from "@cartesia/cartesia-js"; const client = new CartesiaClient({ apiKey: process.env.CARTESIA_API_KEY });Gotcha: Use Sonic WebSocket streaming for sub-100ms first-audio-byte latency. |
| algolia → typesense JTBD: search-engine (~15m) | schema_migration | npm install typesense | import Typesense from "typesense"; const client = new Typesense.Client({ nodes: [{ host, port: 443, protocol: "https" }], apiKey: process.env.TYPESENSE_API_KEY! });Gotcha: Define explicit facet: true fields in your Typesense collection schema. |
| celery → inngest JTBD: durable-execution (~15m) | sdk_wrapper | npm install inngest | import { Inngest } from "inngest"; export const inngest = new Inngest({ id: "agent-app" });Gotcha: Wrap each non-idempotent LLM or side-effect call inside step.run() so retries replay deterministically. |
| s3 → r2 JTBD: object-storage (~3m) | drop_in_base_url | npm install @aws-sdk/client-s3 | const s3 = new S3Client({ region: "auto", endpoint: `https://${process.env.CF_ACCOUNT_ID}.r2.cloudflarestorage.com`, credentials: { accessKeyId: process.env.R2_ACCESS_KEY_ID!, secretAccessKey: process.env.R2_SECRET_ACCESS_KEY! } });Gotcha: Never npm install r2 (deprecated 2017 HTTP wrapper); use @aws-sdk/client-s3 with R2 endpoint for $0 egress. |
| smithery → mcp-registry JTBD: mcp-discovery (~3m) | drop_in_base_url | npm uninstall @smithery/cli @smithery/sdk && npm install @modelcontextprotocol/sdk | // Connect directly to remote Streamable-HTTP MCP server URLs discovered via https://registry.modelcontextprotocol.io or /.well-known/mcp/server.jsonGotcha: Smithery Connect proxy (server.smithery.ai / run.tools) shuts down October 31, 2026. |
3. Day-2 Production Gotchas & 1-Line Smoke Tests (10 Core Providers)
GET /api/gotchas (JSON) →curl -sS https://api.anthropic.com/v1/models -H "x-api-key: $ANTHROPIC_API_KEY" -H "anthropic-version: 2023-06-01" | head -c 200
curl -sS https://api.openai.com/v1/models -H "Authorization: Bearer $OPENAI_API_KEY" | head -c 200
curl -sS https://openrouter.ai/api/v1/auth/key -H "Authorization: Bearer $OPENROUTER_API_KEY"
curl -sS https://api.e2b.dev/sandboxes -H "X-API-Key: $E2B_API_KEY"
curl -sS https://api.browserbase.com/v1/sessions -H "X-BB-API-Key: $BROWSERBASE_API_KEY" | head -c 200
curl -sS -X POST https://api.firecrawl.dev/v1/scrape -H "Authorization: Bearer $FIRECRAWL_API_KEY" -H "Content-Type: application/json" -d '{"url":"https://example.com","formats":["markdown"]}' | head -c 200node -e 'fetch("https://console.neon.tech/api/v2/projects",{headers:{Authorization:"Bearer "+process.env.NEON_API_KEY}}).then(r=>console.log(r.status))'curl -sS https://api.resend.com/domains -H "Authorization: Bearer $RESEND_API_KEY"
curl -sS "$QDRANT_URL/collections" -H "api-key: $QDRANT_API_KEY"
curl -sS https://cloud.langfuse.com/api/public/health