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edec7098e8
Adds sw-block/ directory with:
- distsim: protocol correctness simulator (96 tests)
- cluster model with epoch fencing, barrier semantics, commit modes
- endpoint identity, control-plane flow, candidate eligibility
- timeout events, timer races, same-tick ordering
- session ownership tracking with ID-based stale fencing
- enginev2: standalone V2 sender/session implementation (63 tests)
- per-replica Sender with identity-preserving reconciliation
- RecoverySession with FSM phase transitions and session ID
- execution APIs: BeginConnect, RecordHandshake, BeginCatchUp,
RecordCatchUpProgress, CompleteSessionByID — all sender-authority-gated
- recovery outcome branching: zero-gap, catch-up, needs-rebuild
- assignment-intent orchestration with epoch fencing
- design docs: acceptance criteria, open questions, first-slice spec,
protocol development process
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
V2 Design
Current WAL V2 design set:
wal-replication-v2.mdwal-replication-v2-state-machine.mdwal-replication-v2-orchestrator.mdwal-v2-tiny-prototype.mdwal-v1-to-v2-mapping.mdv2-dist-fsm.mdv2_scenarios.mdv1-v15-v2-comparison.mdv2-scenario-sources-from-v1.mdprotocol-development-process.mdv2-acceptance-criteria.mdv2-open-questions.mdv2-first-slice-session-ownership.mdv2-prototype-roadmap-and-gates.md
These documents are the working design home for the V2 line.
The original project-level copies under learn/projects/sw-block/design/ remain as shared references for now.
Execution note:
- active development tracking for the current simulator phase lives under:
../.private/phase/phase-01.md../.private/phase/phase-02.md