gstack

Install gstack and invoke skills like /review for pre-landing PR checks or /plan-eng-review for architecture review. Each skill is a SKILL.md file that loads specialist instructions into the agent's context when invoked by name.

gstack runs a persistent Chromium daemon that the CLI talks to over localhost HTTP. The first call starts the browser in about 3 seconds; every subsequent command completes in roughly 100-200ms with cookies and tabs preserved.

/scrape drives a page once through agent exploration to extract data, taking around 30 seconds. /skillify codifies that successful flow into a deterministic Playwright script, so repeat scrapes of the same intent run in about 200ms.

Yes, with caveats. A curated Windows-safe test subset runs on windows-latest CI, and the setup script uses copy fallbacks instead of symlinks on MSYS2/Git Bash. Native PowerShell support is listed as a future expansion.

It layers defenses: content sanitization and datamarking, a local BERT-based ML classifier scanning tool outputs, a transcript-level classifier, and a canary token that blocks the session if the system prompt leaks. Tunnel access uses scoped tokens on a separate listener.

Avoid it for one-off screenshots where a cold Playwright launch is acceptable, or when you need WebSocket streaming or MCP protocol integration, both of which gstack intentionally omits in favor of plain HTTP and stdout.