feat: cross-harness collaboration protocol#114
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File-based collaboration protocol enabling two sessions (Claude+Claude, Claude+Codex, Codex+Codex) to co-work on the same repo. Commands: init [name] — Register session send [to] [type] — Send message (task-assigned, task-complete, finding, etc.) poll [name] — Read messages for a session status — Show active sessions + file ownership claim [file] — Claim exclusive file access (prevents conflicts) release [file] — Release file ownership Communication is artifact-based: shared messages.jsonl, status.json, ownership.json, plan.md in .productionos/collaboration/. No shared process or socket — poll-based, file-based, auditable. Implements protocols from docs/srs/cross-harness-collaboration/. tsc --noEmit: 0 errors. All 6 commands tested end-to-end.
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Summary
File-based collaboration protocol for multi-session co-working (Claude+Claude, Claude+Codex, Codex+Codex).
Commands
init— Register session in shared statussend— Send typed message (task-assigned, task-complete, finding, question)poll— Read messages for a specific sessionstatus— Show active sessions + file ownership mapclaim— Claim exclusive file access (prevents edit conflicts)release— Release file ownershipArchitecture
All communication via files in
.productionos/collaboration/:messages.jsonl— Append-only event logstatus.json— Active session registryownership.json— File-level write locksplan.md— Shared plan documentNo shared process. Poll-based. Auditable. Implements the SRS at
docs/srs/cross-harness-collaboration/.Test plan
npx tsc --noEmit— 0 errorsbun run scripts/collaboration/protocol.ts init test— creates sessionbun run scripts/collaboration/protocol.ts send/poll/claim/release— all work