Matt Pocock reshapes Sandcastle v1: every skill becomes an callable Agent() function
mattpocockuk · x · 2026-11-01
Matt Pocock is putting major work into Sandcastle v1, pitched as a tool to build your "software factory":
- 6 built-in harnesses (Claude Code, Codex, etc.) or bring your own
- Integrates with top sandbox providers (Daytona, Vercel, E2B)
- Templates for durable runs via Inngest/Trigger.dev
- HITL over Slack/Discord plus AFK runs
The standout idea: every skill in his repo becomes an Agent() — an invocable function like CodeReview(), ImplementSpec(), Retro(), or ImproveCodebaseArchitecture(). You plug his opinionated skills into infrastructure and services you already run, infinitely extensible. He's asking for feedback on the pitch.
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