Integrate sourceos-syncd as the local-first State Integrity daemon for Workspace Operations

[mdheller]

Purpose

Make sourceos-syncd the SourceOS State Integrity daemon for local-first object, actor, schema, repair, provenance, and policy-governed replication across Workspace Operations.

Context

This repo was created after the April 29 repository dossier and must be integrated into the estate map via SocioProphet/workspace-inventory#6.

Required operation responsibilities

• Maintain local operation log durability.
• Map local_operation_id to remote_operation_id.
• Manage provisional artifact IDs and final artifact reconciliation.
• Track sync checkpoints and causal ordering.
• Produce conflict records for merge/fork/skip decisions.
• Apply tombstones for deletes.
• Track device identity and local encryption profile.
• Detect stale tasks, lease expiry, and replay safety conditions.
• Emit repair/provenance/evidence records to ledger-facing integrations.

Required operation types

• sync.operation.enqueue
• sync.operation.replay
• sync.operation.reconcile
• sync.conflict.detect
• sync.conflict.resolve
• sync.repair.apply
• sync.tombstone.apply
• sync.checkpoint.write

Integration targets

• SourceOS-Linux/sourceos-spec#87
• SociOS-Linux/workstation-contracts#28
• SocioProphet/prophet-core-contracts#1
• SocioProphet/prophet-platform#376
• SocioProphet/prophet-core-ledger#1
• SocioProphet/policy-fabric#46
• SourceOS-Linux/sourceos-shell
• SourceOS-Linux/sourceos-devtools#19

Acceptance criteria

• Sync operations are represented as WorkspaceOperation/OperationTask state.
• Local replay is idempotent and evidence-producing.
• Conflict records use DecisionCard semantics for human/agent resolution.
• Repair actions are auditable and compensatable where possible.
• No remote/cloud sync bypasses policy gates, artifact admission, or ledger evidence.

Hard rule

Local-first sync must be inspectable, repairable, and policy-aware. It cannot silently mutate workspace state.

[mdheller]

@copilot please implement this as a bounded sourceos-syncd local-first sync skeleton.

Scope:

• Add LocalOperationLog, local/remote operation mapping, provisional artifact ID handling, sync checkpoint records, conflict records, tombstone records, stale/lease/replay safety records.
• Add operation-shaped examples for: enqueue, replay, reconcile, conflict detect, conflict resolve, repair apply, tombstone apply, checkpoint write.
• Include a small in-memory or file-backed skeleton only if the repo conventions allow it; otherwise docs + fixtures + validation are acceptable for this slice.

Use current seams:

• Contracts: SocioProphet/prophet-core-contracts#1.
• Runtime skeleton: SocioProphet/prophet-platform#376.
• Workstation contracts: SociOS-Linux/workstation-contracts#28.
• SourceOS spec: SourceOS-Linux/sourceos-spec#87.
• Ledger seam: SocioProphet/prophet-core-ledger#1.
• Policy seam: SocioProphet/policy-fabric#46.

Validation:

• Add tests/fixtures for idempotent replay, conflict record, tombstone, checkpoint, and stale task detection.
• Do not implement full cloud sync, UI shell projection, browser/terminal behavior, or policy rules here.

PR evidence required:

• Summary of files changed.
• Validation commands run and output.
• Explanation of how sourceos-syncd avoids silent local/remote mutation.