portfolio

The work.

Public, MIT-licensed artifacts on the work I want to be doing more of. Generative UI, agent orchestration, eval rigor, MCP server design. Live demos, hosted with rate limits and budget caps. Read the source.

Featured3 essential

loom — durable AI commerce with Vercel Workflows and agentic spending guardrails
Public open-source durable AI-commerce backend. Four workflows demonstrate the patterns that make agent-driven money movement safe in production: cart abandonment with durable sleep and idempotent email, dynamic checkout with bounded discount negotiation, shipping monitoring with saga compensation, and a Stripe webhook drift demo showing why webhook stores are durable logs not queues. Agentic spending authority bounded by a deterministic gate that runs after the LLM finishes. A Sirens eval harness runs ten adversarial scenarios in CI and asserts the gate holds. A failure-injection harness throws between step execution and step recording and proves zero duplicate side effects across N trials. Cost-aware model routing (Haiku for generators, Opus for structured decisions) with a daily USD cap and budget-aware short-circuit before every LLM call.
Author · Applied AITypeScriptNext.js 16Vercel Workflow SDKVercel AI SDKAnthropic SDKStripeZodUpstash
forge — multi-agent debugging concierge
Point it at a stack trace and four specialist subagents fan out in parallel, each with a focused tool set, before a coordinator merges their structured findings into ranked, calibration-weighted hypotheses. Parallel fan-out via Promise.all plus pLimit bounded concurrency. Two-pass agent pattern (generateText then generateObject) for reliable structured output from a tool-using loop. Durable session state with resumable streams. Preemptive abort plumbed end-to-end via AbortSignal, with cross-instance signaling through Upstash so the stop button works across Vercel serverless replicas. Brier-score calibration log as a system-level feedback loop. Five-scenario eval harness with graded rubric and n-runs aggregation. Anthropic prompt-caching breakpoints with honest below-threshold disclosure. Hardened with per-IP rate limit and daily USD spend cap.
Author · Applied AITypeScriptNext.js 16Vercel AI SDKAnthropic SDKp-limitZodUpstashTailwind v4
anchor — AI-native product catalog: dual-surface pages, delegated-authority checkout, AEO instrumentation
Public open-source AI-native commerce surface. Every product has a human page AND three statically-cached LLM-facing endpoints (markdown, JSON-LD, plain) optimized for citation, discovery, and agent purchase. A /.well-known/agents.json descriptor publishes endpoints, auth model, pricing-negotiation envelope, and rate limits in the Agentic Commerce Protocol shape. AEO instrumentation classifies 13 LLM crawlers by user-agent and logs every fetch to Redis via after() so cached responses still get observed. A delegated-authority checkout endpoint runs an eight-check pipeline (signature, expiry, agent binding, scope, nonce, idempotency) with HMAC-SHA256 and constant-time signature comparison, proven by a five-scenario test that asserts happy-path, replay, over-budget, wrong-SKU, and idempotent retry. A comparison agent with generative UI demonstrates structured-output dispatch: the model picks one of three shapes (spec table, pros/cons, recommendation) via a Zod discriminated union and React switch-renders the matching component, type-safe at every boundary.
Author · Applied AITypeScriptNext.js 16React 19Vercel AI SDKAnthropic SDKZodUpstashTailwind v4

More open-source work9 entries

Looking for the production-at-federal-scale work? 7 entries here →

The work.

loom — durable AI commerce with Vercel Workflows and agentic spending guardrails

forge — multi-agent debugging concierge

anchor — AI-native product catalog: dual-surface pages, delegated-authority checkout, AEO instrumentation

issuegraph — GitHub issue triage agent on LangGraph with LangSmith evals

tablesalt — CSV agent with generative UI, reasoning trace, and live eval scoreboard

streamfield — React primitive for partial-object stream UIs

fedbench — LLM eval harness for grounded Q&A

fieldops-mcp — agent tool server for a field-services workflow

grant-pilot — federal-grants agent with sub-agent orchestration

kev-o — grounded RAG chatbot trained on my own writing

mdx-corpus — npm package: MDX directory to retrieval-ready corpus

kevinmurphywebdev.com — personal site + portfolio + resume