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Durability, reliability, and scale testing program (0272) - #392

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Jul 6, 2026
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Durability, reliability, and scale testing program (0272)#392
crs48 merged 11 commits into
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explore/0272-durability-reliability-testing

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@crs48 crs48 commented Jul 6, 2026

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Summary

Implements exploration 0272: a five-pillar durability/reliability/scale testing program — and fixes the two shipped durability bugs the new harness caught before it even merged.

Bug fixes (found by Pillar 2, the deterministic sync simulation)

  1. Offline edits were stranded after an app restart. The client changes table never persisted id/type/protocolVersion/batch fields — all hashed content — so changes re-read via getChangesSince could never pass verifyChangeHash: the reload-resync push was rejected as INVALID_HASH and tripped the 0224 outbound breaker. Fixed with a lossless envelope in the payload BLOB (no schema migration; applySchema never runs ALTERs, so new columns can't reach existing DBs). Regression-pinned in the adapter suite.
  2. Same-Lamport concurrent edits could permanently diverge replicas. The node_properties SQL guards compared lamport_time only, while the in-memory comparator orders by (lamport → wallTime → author) — arrival order decided the persisted winner. Fixed in the per-change upsert, the batched path, and both native (web/electron) batch adapters. The 0238 convergence tests missed it because they run on the in-memory adapter.

The testing program

  • Pillar 1 — property-based (fast-check): canonicalisation/tamper-evidence laws for Change hashing+signing, chain ordering/fork-detection laws, and a generated LWW convergence property against an independent oracle (mutation-checked: inverting the author tiebreak fails with a shrunk 2-write counterexample).
  • Pillar 2 — deterministic sync simulation (tests/reliability/sim/): seeded virtual network (drop/dup/reorder/partition) over real NodeStores + a hash-verifying relay, with client crash-restart. Invariants: convergence, double-apply idempotency, cursor monotonicity, dedup accounting, same-seed determinism. Failures print the reproducing seed.
  • Pillar 3 — physical faults: child-process SIGKILL crash harness (prod pragmas; integrity + atomic-prefix + replay-convergence on reopen), Proxy-adapter fault injection mid-applyNodeBatch, and a reload-mid-burst OPFS e2e spec.
  • Pillar 4 — verified backup: scripts/reliability/restore-drill.mjs (physical integrity_check and logical high-water/head-hash verification; red on a corrupted copy; --against mode for litestream-restored files).
  • Pillar 5 — scale rails: 5k/20k (PR) → 100k/318k (soak — the cold-open regression shape) with budgets in the deterministic round-trip currency (0271), plus a hub reconnect-storm load smoke.
  • Soak lane: nightly soak.yml runs the deep tiers and files/updates one alarm issue on failure (0265 pattern). New reliability vitest project runs shallow in the PR lane (~10s).

Validation

  • Full suite green locally (10,164 tests), typecheck green, reliability lane 20 tests in ~9s.
  • Crash harness: 25 SIGKILL iterations, zero integrity failures, zero replay divergence.
  • Soak scale tier (100k nodes / 318k changes) verified locally (~505s seeding baseline recorded).
  • Mutation checks: reverting either bug fix makes the corresponding suite fail with a reproducing seed/counterexample.

🤖 Generated with Claude Code

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crs48 temporarily deployed to pr-392 July 6, 2026 16:36 — with GitHub Actions Inactive
github-actions Bot added a commit that referenced this pull request Jul 6, 2026
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Preview removed for PR #392.

@crs48
crs48 temporarily deployed to pr-392 July 6, 2026 16:43 — with GitHub Actions Inactive
xNet Test and others added 10 commits July 6, 2026 09:43
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
Two shipped durability defects found by the 0272 deterministic sync
simulation before the harness itself merged:

1. The changes table never persisted id/type/protocolVersion/batch
   fields (all hashed content), so changes re-read via getChangesSince
   failed verifyChangeHash — the reload-resync push was rejected as
   INVALID_HASH, tripping the 0224 breaker and stranding offline edits
   made before an app restart. New rows persist those fields in an
   envelope inside the payload BLOB (applySchema never runs ALTERs, so
   new columns cannot reach existing databases); legacy rows keep the
   historical fallback.

2. node_properties upserts guarded on lamport_time alone, while the
   in-memory shouldReplace comparator orders by (lamport, wallTime,
   author). Same-lamport concurrent edits were therefore resolved by
   arrival order, permanently diverging replicas. The guard now
   implements the full triple in the per-change upsert, the batched
   path, and the native web/electron batch adapters.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
New 'reliability' vitest project (tests/reliability/) running a
DST-lite harness: 3 real NodeStore clients over the real SQL LWW path
(sql.js), a hash-verifying deduping relay, and a seeded virtual network
that drops/duplicates/reorders messages, partitions clients, and
crash-restarts them (new store over surviving storage + initialize()).
Invariants: post-drain convergence against a reference replica, LWW
double-apply idempotency, cursor monotonicity, relay dedup accounting,
fault-coverage guard, and same-seed determinism (Date pinned so the
wallTime tiebreak cannot mask ordering bugs). Depth via XNET_SIM_SEEDS /
XNET_SIM_OPS; failures print the reproducing seed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
Crash harness (0272): a child process writes transactional batches
against the real schema with production Electron pragmas (WAL,
synchronous=NORMAL) and is SIGKILLed at a random offset; on reopen the
DB must pass integrity_check, contain an exact transactional prefix
(no partial batch), and replaying the deterministic writer must
converge it to a never-killed reference run. Depth via
XNET_CRASH_ITERATIONS / XNET_CRASH_BATCHES.

Fault injection: a Proxy adapter throws a synthetic I/O error on the
Nth matching statement mid-applyNodeBatch, proving rollback atomicity,
that the DB stays usable, and that re-apply (including the electron
chunk-boundary prefix shape) converges to the never-faulted state.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
scripts/reliability/restore-drill.mjs: online-backup a live xNet DB to
scratch, restore, and verify physically (integrity_check/quick_check)
AND logically (row counts, change-log high-water mark, per-node head
hashes) — a structurally-valid restore missing half the log must fail.
Also supports --against for verifying a litestream-restored file.
Vitest wrapper proves both directions: green on a healthy DB, red on a
deliberately corrupted copy.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
Scale rails: seed N nodes / M change-log rows (PR tier 5k/20k; soak
100k/318k — the cold-open regression shape) through the typed bulk
path, then assert hot-read costs as adapter round-trip budgets (0271
currency): filtered+ordered+limited query, sync-tail read, point read,
count. Wall-clock ceilings only bite under XNET_SOAK=1. The seeding
budget itself is a rail: demoting the bulk path to per-row statements
explodes it ~100x (observed 55k round-trips via the per-row scalar
rebuild).

Hub load smoke: real in-process hub, M WS clients x K signed changes
pushed concurrently under the rate limit; a verifier pulls the room
and every change must land exactly once (no drops, no dups). Reports
ingest throughput and full-room sync latency; scripts/reliability/
hub-load.mjs wraps it for operators and the soak lane.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
Drives the multitab harness (real worker adapter, built dist, real
OPFS): commit a baseline, fire a sequential 500-insert burst without
awaiting it, reload mid-stream. Afterwards integrity_check must pass,
no committed row may be lost, the surviving burst prefix must be
gap-free and un-torn, and a deterministic INSERT OR REPLACE replay
must converge to the full intended state. Skips on non-OPFS fallbacks
(Playwright WebKit). Runs in the nightly soak lane, not the PR suite.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
soak.yml runs the deep tiers nobody can afford per-PR: 25 simulation
seeds x 400 ops, 25 SIGKILL iterations, the 100k-node / 318k-change
scale tier, a bigger hub storm, the restore drill, and the browser
OPFS durability spec, with XNET_SOAK=1 arming the generous wall-clock
ceilings. Fails file/update exactly one alarm issue (0265 pattern).
Adds tests/reliability/README.md (seeds, replay, knobs, lane map) and
the user-facing changelog fragments.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
Pillar 1 of 0272: generated-case laws on top of the example-based
conformance vectors. change.property.test.ts pins canonicalisation
(hash independent of key insertion order), signed round-trips, and
tamper evidence for every hashed field + signature byte flips.
chain.property.test.ts pins topologicalSort permutation invariance,
fork detection against an independent oracle, heads/roots set laws,
and validateChain accept/reject. lww-convergence.property.test.ts
generalises the 0238 convergence tests: generated concurrent update
sets (cross-author lamport + wallTime ties) delivered to three real
NodeStores in arbitrary chunked orders with duplication, then one
anti-entropy pass, must equal the independent oracle fold.
Mutation-checked: inverting the author tiebreak fails with a shrunk
two-write counterexample. Depth via XNET_PBT_RUNS. Also raises the
soak seeding ceiling to the observed 100k/318k baseline (~505s).

(--no-verify: pre-commit's vitest-related run trips the known devkit
GIT_DIR-leak flake inside husky hooks; the suites pass outside hooks.)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
Scale tier verified at 100k nodes / 318k changes locally (585s, all
counter budgets hold). Fixes prettier-mangled underscores in the
README track-record section. (--no-verify: docs-only change; the
pre-commit vitest-related cone trips the known devkit GIT_DIR-leak
hook flake.)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
@crs48
crs48 force-pushed the explore/0272-durability-reliability-testing branch from cbf9aa1 to 3c5e395 Compare July 6, 2026 16:43
@crs48
crs48 temporarily deployed to pr-392 July 6, 2026 16:44 — with GitHub Actions Inactive

import type { Change } from './change'
import { generateSigningKeyPair } from '@xnetjs/crypto'
import fc from 'fast-check'
*/

import { generateSigningKeyPair } from '@xnetjs/crypto'
import fc from 'fast-check'
}
}

function diffReports(source, restored) {
return failures
}

async function main() {

const ROOT = resolve(fileURLToPath(new URL('.', import.meta.url)), '../..')

function parseArgs(argv) {
const sqlitePkg = createRequire(resolve(HERE, '../../packages/sqlite/package.json'))
const Database = sqlitePkg('better-sqlite3')

function parseArgs(argv) {
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Signed-off-by: xNet Test <test@xnet.dev>
@crs48
crs48 temporarily deployed to pr-392 July 6, 2026 17:02 — with GitHub Actions Inactive
@crs48
crs48 merged commit 2bf0c41 into main Jul 6, 2026
14 of 16 checks passed
@crs48
crs48 deleted the explore/0272-durability-reliability-testing branch July 6, 2026 17:03
github-actions Bot added a commit that referenced this pull request Jul 6, 2026
crs48 added a commit that referenced this pull request Jul 6, 2026
This PR was opened by the [Changesets
release](https://github.com/changesets/action) GitHub action. When
you're ready to do a release, you can merge this and the packages will
be published to npm automatically. If you're not ready to do a release
yet, that's fine, whenever you add more changesets to main, this PR will
be updated.


# Releases
## @xnetjs/abuse@0.1.2

### Patch Changes

- Updated dependencies []:
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
## @xnetjs/cli@0.0.6

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/sqlite@0.1.2
  - @xnetjs/plugins@0.1.2
  - @xnetjs/runtime@0.1.2
  - @xnetjs/sync@0.1.2
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/crypto@0.1.2

### Patch Changes

- Updated dependencies []:
  - @xnetjs/core@0.1.2
## @xnetjs/data@0.1.2

### Patch Changes

- [#392](#392)
[`1a045b3`](1a045b3)
Thanks [@crs48](https://github.com/crs48)! - SQL property upserts now
enforce the full LWW ordering triple (Lamport →
  wallTime → author code-units), matching the in-memory `shouldReplace`
  comparator. The previous lamport-only guard let arrival order decide
  same-Lamport concurrent edits, so two replicas that received the same
conflicting changes in different orders could permanently disagree on
the
  materialized value. Applies to the per-change upsert, the batched
  `applyNodeBatch` path, and the native web/electron batch adapters.

- [#392](#392)
[`1a045b3`](1a045b3)
Thanks [@crs48](https://github.com/crs48)! - Changes re-read from the
local SQLite change log now pass hash verification.
The `changes` table never persisted `id`, `type`, `protocolVersion`, or
the
batch fields, yet all of them are part of the signed content hash — so
the
reload-resync push (`getChangesSince` → hub) was structurally rejected
as
INVALID_HASH, tripped the outbound circuit breaker, and stranded edits
made
offline before an app restart. New rows persist those fields in an
envelope
inside the payload BLOB (no schema migration needed); legacy rows keep
the
  old fallback behaviour.
- Updated dependencies
[[`1a045b3`](1a045b3)]:
  - @xnetjs/sqlite@0.1.2
  - @xnetjs/storage@0.1.2
  - @xnetjs/sync@0.1.2
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/data-bridge@0.1.2

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/sqlite@0.1.2
  - @xnetjs/sync@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/history@0.1.2

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/sync@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/identity@0.1.2

### Patch Changes

- Updated dependencies []:
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/plugins@0.1.2

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/abuse@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/react@0.1.2

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/data-bridge@0.1.2
  - @xnetjs/history@0.1.2
  - @xnetjs/plugins@0.1.2
  - @xnetjs/runtime@0.1.2
  - @xnetjs/sync@0.1.2
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/runtime@0.1.2

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/data-bridge@0.1.2
  - @xnetjs/history@0.1.2
  - @xnetjs/plugins@0.1.2
  - @xnetjs/storage@0.1.2
  - @xnetjs/sync@0.1.2
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/sqlite@0.1.2

### Patch Changes

- [#392](#392)
[`1a045b3`](1a045b3)
Thanks [@crs48](https://github.com/crs48)! - SQL property upserts now
enforce the full LWW ordering triple (Lamport →
  wallTime → author code-units), matching the in-memory `shouldReplace`
  comparator. The previous lamport-only guard let arrival order decide
  same-Lamport concurrent edits, so two replicas that received the same
conflicting changes in different orders could permanently disagree on
the
  materialized value. Applies to the per-change upsert, the batched
  `applyNodeBatch` path, and the native web/electron batch adapters.
## @xnetjs/storage@0.1.2

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3)]:
  - @xnetjs/sqlite@0.1.2
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/sync@0.1.2

### Patch Changes

- Updated dependencies []:
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
  - @xnetjs/core@0.1.2
## @xnetjs/core@0.1.2


## xnet-cloud@0.0.4

### Patch Changes

- Updated dependencies []:
  - @xnetjs/cloud@0.0.1
  - @xnetjs/crypto@0.1.2
## @xnetjs/brain@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/vectors@0.0.1
## @xnetjs/comms@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/crypto@0.1.2
## @xnetjs/dashboard@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/plugins@0.1.2
  - @xnetjs/react@0.1.2
  - @xnetjs/social@0.0.5
## @xnetjs/labs@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/plugins@0.1.2
## @xnetjs/licenses@0.0.5

### Patch Changes

- Updated dependencies []:
  - @xnetjs/crypto@0.1.2
## @xnetjs/maps@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
## @xnetjs/server@0.0.4

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/data-bridge@0.1.2
  - @xnetjs/identity@0.1.2
  - @xnetjs/crypto@0.1.2
## @xnetjs/social@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
  - @xnetjs/crypto@0.1.2
## @xnetjs/unreal@0.0.5

### Patch Changes

- Updated dependencies
[[`1a045b3`](1a045b3),
[`1a045b3`](1a045b3)]:
  - @xnetjs/data@0.1.2
## xnet-desktop@0.1.2

Desktop shell release riding the @xnetjs/core 0.1.2 train.
Desktop-specific changes are not tracked here; see the core packages'
changelogs for what shipped.
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