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How Scion Works: Source Control for 30,000 Merges a Day

Diagram of the Scion architecture: agents and CI jobs run thin scn clients that sync through scion-daemon and scion-cache tiers to one authoritative scion-server backed by Spanner and cloud storage, with Antique handling code review and the merge queue

TL;DR 45 sec5 min coredeep dive optional Scion is the source-control system Anthropic built when agents pushed its monorepo past 30,000 merges a day. It trades git’s distributed design for one authoritative server, a write-ahead changeset log, and review tooling built for machine-scale concurrency. Merges grew from roughly 2,500 a day in May 2026 to… Continue reading →

Claude Code Worktrees for Parallel Development

Claude Code Worktrees: Powerful Parallel Guide

Worktrees let Claude Code run parallel branches, isolate subagents, and scale development without context collision. Instead of stashing half-finished changes to switch tasks, you spin up a dedicated checkout for each effort. This guide covers the native –worktree flag, the EnterWorktree tool, subagent isolation, the /batch skill, hooks for non-git VCS, and the cleanup lifecycle… Continue reading →