sergey@works:~$
whoami --verbose
Research · Web Platform Standards · AI Agents · Open Source
Software engineer and independent researcher working on AI agent infrastructure, the web platform, developer tools, and open source.
Works with TC39 and W3C standards where specifications meet browser behavior, runtimes, and developer-facing APIs.
or press `
$ cat ./skills.json
Core skills
AI / LLM systemsagent orchestrationprompt/tool flowsharnessllama.cpp
Web platform / standardsTC39W3CTest262WebAssemblyJavaScriptCoreWebKitbrowsers/webviews
LanguagesTypeScriptGoC++Zig
Platform / observabilityOpenTelemetrytraces/metrics/logsPrometheusGrafanaOTel CollectorDockerKubernetesTerraformAWSGCPCloudflare
$ ls ./projects/
whatLocal-first AI runtime console for cloud/local models and Hecate Chat
featuresSupervised coding-agent sessions · task approvals · usage visibility · OpenTelemetry
stackGoTypeScriptReactTauriSQLiteOpenTelemetry
whatStrict-only ECMAScript engine in Zig for non-browser hosts such as edge JS, Workers, and server-side JS
stackZigECMAScriptTest262compiler/engine internals
Pragmatist
soon
whatTool for finding, reproducing, and verifying bugs across ECMA-262, TypeScript, and JavaScript engines
featuresSpec-aware queries · Coq/Rocq mechanization · TypeScript parser and library diffs · cross-engine differential runs · test262/spec patch scaffolds · deterministic verification
stackTypeScriptCoq/RocqECMA-262tsgoZod
whatMCP server that exposes TC39 specifications as clause-level, SHA-pinned data for agents and developer tools
featuresAOID-aware search · cross-spec references · edition diffs · git history · test262 and proposal lookup · offline stdio and public HTTP
stackTypeScriptECMA-262ECMA-402Cloudflare WorkersVitePressZod
More projects
↗ personal repos
↗ xyzzy labs
whereMore open-source work, experiments, and smaller tools live on GitHub.
$ curl sergey.works/links
open to: AI agents · web platform · developer tools · observability · standards
based in Barcelona, Spain · available for remote
GitHub
github.com/chicoxyzzy
LinkedIn
linkedin.com/in/chicoxyzzy
X / Twitter
x.com/chicoxyzzy
Bluesky
bsky.app/sergey.works
# EOF · sergey rubanov · 2026