AgenC Swarm Upgrade: Parallel Coding Agents with Git Worktree Isolation
tetsuoai · x · 2026-07-23
AgenC shipped a Swarm upgrade for concurrent coding agents. The core philosophy is that topology must match the task: the router defaults to a single agent and recommends fan-out only for explicitly parallel or independent work.
Key engineering practices include:
- Atomic Admission & Durability: Child tasks are durably registered before execution. Outcomes are written to a journal before notifying the parent, failing closed on persistence errors.
- Isolated Execution: Inspired by async engineering papers, every parallel writer gets a spawn-unique Git Worktree to prevent interference.
- Immutable Integration Evidence: An integration reference is only returned if the work is cleanly committed and verifiable. Dirty or diverged work is never auto-merged.
- Bounded Context: Agent identities are runtime-authenticated. Children start with clean context by default, treating conversation history as an explicit dependency.
Related event: AgenC Defaults to Single Agent After Multi-Agent Setbacks(4 posts)→
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