Daily recap for May 28, 2026

Today we shipped 6 new step-by-step tutorials for small-business AI, plus the TypeScript building blocks that help your agents talk to each other using the A2A protocol.

New tutorials

Vertex AI Code Sandbox for QuickBooks Financial Modeling

Ask conversational questions about your QuickBooks data and get answers from safe, sandboxed code execution. This solution lets SMBs run ad‑hoc financial analysis—cash flow forecasting, expense categorization—without hiring a data analyst. A secure e2b sandbox runs Python scripts that query QuickBooks directly, with session continuity and a tool‑use firewall to keep risky operations in check.

Read the tutorial → and download the code (zip)

Built with Vertex AI, e2b sandbox, Next.js; 159 tests, 98.91% coverage.

Mistral AI Security Guardrails for Square Payment Dispute Resolution

An AI agent drafts responses to Square payment disputes while guardrails ensure you never send PII or an unapproved message. For SMBs fighting chargebacks, it fetches disputes via Square SDK, drafts a reply with Mistral, and routes every output through a pipeline that redacts personal data, blocks toxic language, and demands human approval before submission. A budget cap keeps costs predictable.

Read the tutorial → and download the code (zip)

Built with Mistral, Express; 90 tests, 100% coverage.

Ollama Reliability Suite for On-Prem SMB Agent Operations

Keep local Ollama agents running 24/7 without a dedicated SRE. This suite combines circuit breaking that stops pounding a dead model, session continuity that preserves conversation state across restarts, structured output repair that fixes garbled JSON before it hits your app, and automated runbooks that tell you what to do when something breaks. Works on any Linux or macOS machine with Ollama installed.

Read the tutorial → and download the code (zip)

Built with Ollama, CLI/lib; 198 tests, 100% coverage.

xAI Grok Voice Lead Intake for Small Business

Answer after-hours calls and qualify leads automatically with a voice agent backed by xAI Grok. This solution connects to your phone line via Twilio, transcribes caller speech with Deepgram, asks qualifying questions, and syncs qualified leads to your CRM—all while maintaining session continuity so long conversations don’t lose context. No staff required when the phone rings after 5pm.

Read the tutorial → and download the code (zip)

Built with xAI Grok, Fastify, Twilio; 107 tests, 99.13% coverage.

Perplexity Security Guardrails for SMB Financial Queries

Safely use Perplexity’s search-augmented AI for financial Q&A without exposing PII or sensitive data. A guardrail chain screens every message: it redacts names and account numbers, blocks toxic or off-topic requests, and validates outputs for hallucinated figures. Every action is logged for audit, and per-query cost tracking helps you stay on budget. Built for SMBs handling customer financial data.

Read the tutorial → and download the code (zip)

Built with Perplexity, Next.js; 72 tests, 98.62% coverage.

xAI Grok Expense Report Extraction for SMB Finance

Turn scanned receipts and PDF invoices into clean spreadsheets automatically. The pipeline OCRs documents, passes the text to Grok for structured extraction of line items, totals, and merchant names, then repairs any malformed JSON. Accuracy is validated against reference data, and results export as CSV files to S3. If your finance team still types numbers from paper, this replaces hours of manual entry.

Read the tutorial → and download the code (zip)

Built with xAI Grok, Express; 99 tests, 98.99% coverage.

Building blocks shipped

Agent-to-Agent protocol reference (a2a-reference-ts)

Eight packages that give you everything you need to build and run agents speaking the A2A protocol. The core package provides canonical types and validators; the client and server handle task submission, SSE streaming, and Hono/Express adapters; persistence backends cover memory, filesystem, Redis, and Postgres. A CLI gets you going fast, and the MCP bridge lets you mix A2A agents with MCP tools. Browse the family →

Browse the full catalog at reaatech.com/products.