Frontend and full-stack engineer working on AI agents: how they get context, how their changes get verified, and how people work with them in the browser.

Building

• delivery-verifier: dv prove checks regression tests against old and new commits in separate Git worktrees, with pytest, unittest, Node and Vitest 3.2/4.1 support and a GitHub Action for pull requests. v0.4.0, proven on a real merged fix in Arize Phoenix
• OwnContext: self-hosted personal context for AI clients over MCP (preview)

Merged upstream: AI agent UIs and SDKs

• assistant-ui (9): runtime adapters for the AI SDK, AG-UI, LangChain, Google ADK, OpenCode and Pi keep what the agent produced: uploaded filenames, files and artifacts in tool results, provider metadata and file handles, stable part identities
• Arize Phoenix (7): LLM tracing and evals clients decode Anthropic and AI SDK tool inputs, keep strict response schemas, extra_body, fields beside anyOf, evaluator metadata and JSON-string span filters; the dataset view refreshes its example count
• Effect (4): Stream.groupAdjacentBy emits buffered groups before an upstream failure; DateTime rounding keeps the offset inside a repeated DST hour; Iterable.unfold and filterMapWhile stay exhausted
• AnythingLLM (3): long-prompt compression keeps images; KoboldCPP agents honour max response tokens; GitHub re-sync encodes file paths
• Vercel AI SDK: decode base64 and data-URL documents before sending them to Cohere

Merged upstream: frontend and tooling

• knip (11): new Lingui, kysely-codegen and PurgeCSS plugins; Babel, CSpell, SVGR, Relay, SWC, Eleventy and npm-package-json-lint plugins read every config location and format their tools support
• React Hook Form (3) and resolvers (2): trigger keeps nested field-array root errors; a Controller reads the current shouldUnregister on unmount; empty-string checkbox options; TypeBox and fluentvalidation-ts error paths
• TanStack Virtual (3): Svelte and Vue adapters keep options and callbacks across updates and detach observers when the scroll element goes away
• Rollup: keep line terminators in module ids
• SvelteKit: use the UTF-8 byte length when reading inline assets
• Solid: sync array length when reconciling server-side stores
• Lexical: round-trip link titles and destinations through Markdown
• Mantine, UnoCSS, Starlight: zero alpha in hsla colors, preset-wind4 containment utilities, sidebar autogeneration from the docs root
• Earlier: Ant Design (test suite migration to Testing Library), screenshot-to-code (stop button, live code editing, image-comparison debugging), LlamaIndexTS

Writing: clean99.github.io