CircleCI Chunk sidecars validate agent code in microVMs before CI
At a glance
CircleCI's Chunk sidecars run scoped microbuilds in Firecracker/E2B microVMs that mirror CI, hooking agent stop/eval events so Claude Code, Codex, or Cursor changes are validated before commit—~27s microbuilds and 3–5× lower token burn on retries in their tests. This workflow is listed under CI, Agent-Tooling, Claude-Code, Cursor, Codex.
Room Service 3.3’s local MCP gives coding agents disk/port/Git visibility and actions like stop-port or trash build data—off by default, local socket only, permanent actions need in-app approval, every action logged.
Kelos orchestrates Claude Code, Codex, Gemini, or OpenCode in ephemeral Kubernetes pods as CRDs—watching bug issues, drafting fix PRs, self-reviewing, and retrying when CI fails—while the author still does final review and merge.
An HN commenter described a Claude Code setup with reusable skills for a UI library/Storybooks/APIs, a post-change review agent, PR checklist reviews, scheduled docs/coverage agents, and ticket triage that leaves a halfway-done plan on each issue.
A developer routed Grok Bot through their ChatGPT Pro subscription after hitting cloud-agent limits, calling remote Codex environments clunkier than Cursor but workable.