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flow: replication + handoff across instances + 6 tests (Phase 4 complete)
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flow-replicate-to copies the plain-data store export to a peer's replica slot;
flow-restore-from imports it. Handoff = replicate, local instance dies, peer
restores and resumes by id. The replay log survives the move, so all resolved
suspends carry over. Same durable-data mechanism as crash recovery, across
instances. All four phases complete: 93/93.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
giles
2026-06-06 17:48:39 +00:00
parent f8722b3b08
commit 16cb727406
7 changed files with 70 additions and 15 deletions
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6
lib/flow/scoreboard.md
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@@ -1,6 +1,6 @@
# flow-on-sx Scoreboard
**All tests pass: 87 / 87 across 5 suites.**
**All tests pass: 93 / 93 across 5 suites. All four phases complete.**
`bash lib/flow/conformance.sh`
@@ -12,7 +12,7 @@
| control | 31 | Phase 2: `branch` (6); error model `fail`/`failed?`/`fail-reason` (6); `try-catch` (6); `retry n` (6); `timeout` cooperative step budget (7) |
| suspend | 17 | Phase 3: suspend/resume/cancel via deterministic replay; multi-step, replay determinism, lifecycle guards, suspend-in-branch |
| recovery | 8 | Phase 3: crash recovery — store export/import, resumable scan, restart-at-every-step, replay-log survival |
| distributed | 13 | Phase 4: `remote-node` on mock fed-sx peers (7); `remote-failover` across peers + local fallback (6) |
| distributed | 19 | Phase 4: `remote-node` (7); `remote-failover` (6); replication + handoff across instances (6) |
## Architecture
@@ -41,6 +41,6 @@ capture the flow continuation directly.
- [x] Phase 1 — Declarative DAG + sequential execution (combinators + 18 tests, `flow/start`)
- [x] Phase 2 — Control flow + error handling (branch, error model, try-catch, retry, timeout)
- [x] Phase 3 — Suspend/resume (suspend/resume/cancel + crash recovery via deterministic replay)
- [~] Phase 4 — Distributed nodes via fed-sx (remote-node done; failover + handoff next)
- [x] Phase 4 — Distributed nodes via fed-sx (remote-node, failover, replication + handoff)
- [ ] Phase 3 — Suspend / resume (the showcase)
- [ ] Phase 4 — Distributed nodes via fed-sx