Angelo Ashmore

Senior Developer Experience Engineer
Honolulu, Hawaii, United States

I design and build developer tools: SDKs, CLIs, and documentation.

The packages I maintain are open source, and downloaded over 800,000 times a week.

Lately, I've focused on making them usable by AI agents: API shape, command names, error messages, and help text.

• Email:hi@angeloashmore.com
• Bluesky:@angeloashmore.com
• GitHub:https://github.com/angeloashmore
• LinkedIn:https://www.linkedin.com/in/angeloashmore
• Writing:https://prismic.io/blog/authors/angelo-ashmore

Work history

Prismic, Senior Developer Experience Engineer (2021–Present)

• Proposed, designed, and built the Prismic CLI, now the primary way to build with Prismic. I own its command structure, output, error messages, and help content. Built for developers and AI agents equally.
• Built an eval suite measuring whether an AI agent can use the CLI: correctness, and cost in time and money. Runs weekly in CI.
• Designed and maintain Prismic's SDKs and framework integrations. Over 800k weekly downloads. Prismic's Next.js expert.
• Open sourced the general-purpose tools that came out of building Prismic, including imgix-url-builder, a typed imgix URL builder (over 200k weekly downloads), and r19, a type-safe RPC library built for Slice Machine (over 40k weekly downloads).
• Own Prismic's documentation. Rearchitected it for marketers and developers, built the Next.js site, and designed the content to serve both people and AI agents.

Wall-to-Wall Studios, Senior Developer (2017–2021)

• Led a team building client websites with Gatsby, React, and Prismic, working closely with graphic designers. I proposed work to clients and internally, and led the technical discussions behind the company's decisions.
• Built the agency's standard website architecture: a shared starter and reusable page sections instead of full-page templates. Sections let developers build in parallel and let clients compose their own pages, reducing build time.
• Clients included Hawaii National Bank, L&L Hawaiian Barbecue, Belt Collins Hawaii, and Peter Vincent Architects.
• Open sourced the utilities we built, including the Prismic integration for Gatsby that became the official integration and led to my role at Prismic.

Open source work

• @prismicio/client + SDKs (https://prismic.io/docs/apis)
  A suite of libraries for building Prismic websites.
• prismicio/cli (https://github.com/prismicio/cli)
  The Prismic CLI, built for developers and AI agents.
• prismic-ts-codegen (https://github.com/prismicio/prismic-ts-codegen)
  Generates TypeScript types from Prismic content models.
• gatsby-source-prismic (https://github.com/prismicio/prismic-gatsby)
  Prismic as a Gatsby content source. Became the official integration, and led to my job at Prismic.
• gatsby-source-shopify (https://github.com/angeloashmore/gatsby-source-shopify)
  Shopify as a Gatsby content source. Became the official integration.
• imgix-url-builder (https://github.com/prismicio-community/imgix-url-builder)
  Type-safe image URL builder for imgix, generated from their JSON spec.
• r19 (https://github.com/prismicio-community/r19)
  Minimal type-safe RPC library for Node.js servers.
• tw-capsize (https://github.com/angeloashmore/tw-capsize)
  Capsize for Tailwind v4 in pure CSS, with no plugin or runtime package.

Skills

TypeScript, React, Next.js, MDX, Node.js, Vite, Vitest, Playwright, GitHub Actions, HTML, CSS, AI tooling, agent evals.