Foremerge: an open-source protocol that lets parallel coding agents declare intent before edits

ShiftTechnical · reddit · 2026-09-11

The author of Foremerge, an open-source coordination protocol for parallel coding agents, opens a design discussion. Before editing, an agent publishes its intended change as scopes with declared operations — a second agent touching the same scope gets a HIGH conflict finding before any code is written. Claims are leased and advisory, stored in SQLite under Git's common directory so isolated worktrees share it.

Key observation: the protocol has two halves. The front half (intent, claims, conflict findings, approvals) doesn't depend on Git beyond locating the store; the back half is Git all the way down — ChangeSets are fingerprinted, verification only counts if the fingerprint is unchanged, and acceptance pins immutable commits under refs/foremerge/accepted.

Four open questions: what serves as a content-addressed snapshot for non-repo resources (Terraform state, CRM records)? What real collisions have people seen between non-coding agents (e.g. refund vs. escalation)? Should the scope vocabulary be open or use per-domain profiles? And is pre-action detection most valuable precisely when actions can't be undone? The design deliberately keeps models out of conflict judgment — the detector is deterministic.

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Foremerge: an open-source protocol that lets parallel coding agents declare intent before edits

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