[claude] Slow-sync demo project, generator, and sync timing harness by myieye · Pull Request #8 · myieye/languageforge-lexbox

myieye · 2026-07-29T22:02:00Z

[Claude, autonomous]

Staging PR — never merge; promoted to sillsdev when polished (see FORK.md).

Adds a generate command to LcmDebugger that builds a deterministic demo project whose FwData↔CRDT sync is slow for the right reasons (30605-commit CRDT history, fw_snapshot lagging fwdata by 1000 entries, 700 complex-form links among the lagging entries), and a sync command that runs a FwHeadless-style dry-run sync with per-phase timing. The 36MB artifact is committed; scripts/unpack-demo-project.sh retrieves it without regenerating.

Baseline (BASELINE.md): dry-run sync 17m28s, 437ms avg per change record, CrdtChanges 2400 / FwdataChanges 0 — the correctness gate for the optimization PRs that follow.

Includes the dry-run-sync-fidelity commits it builds on (dry-run against a throwaway CRDT copy, phase/progress logging, PreventEviction); the last 4 commits are new.

Generated by Claude Code

…ay copy The sync writes the CRDT then reads it back within a pass (direction B reads the CRDT after direction A wrote it). The old dry-run wrapped the CRDT in a record-only DryRunMiniLcmApi, so that read-back saw stale state: direction B thought fwdata's whole inventory should be deleted. Mostly that garbage was silently recorded, but MorphTypeSync.Remove threw on it, and the fwdata-side change counts were meaningless (the Sena3 test only compared CRDT changes and documented the fwdata side as garbage). Run the CRDT side of a dry run against a disposable copy of its own database instead, so writes really apply and read back faithfully, and record what was applied. FwData is read once up front (never read back) and its file must not change, so it stays a record-only DryRunMiniLcmApi. - CrdtProjectsService.OpenProjectCopy backs up the sqlite db to a temp file and opens it as a throwaway project in its own scope; TempCrdtProjectCopy disposes the scope and deletes the temp files. - RecordingMiniLcmApi records each write and forwards it to the copy (AutoInterface forwards reads/Submit*/everything else, so it's correct even where it doesn't record). - IDryRunRecorder lets the sync pull records from either wrapper. - CrdtRepairs.SyncMissingTranslationIds drops its dryRun flag: with the copy, the CRDT write is always safe. - Sena3 DryRunSync tests now also assert FwdataChanges; DryRunSync_MakesNoChanges gets a consistent writing-system setup (the faithful run surfaces the inconsistency the fake one hid). This also fixes PR sillsdev#2483's failure: with morph-type seeding removed the CRDT starts blank, and the dry run no longer throws on the phantom morph-type removal (verified by running the DryRunSync tests with seeding disabled). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Recording lived in two places: the old DryRunMiniLcmApi (record + swallow) and the new RecordingMiniLcmApi (record + apply), duplicating ~50 write descriptions. Split the two concerns instead: RecordingMiniLcmApi is the single recorder, and what its inner api does decides whether writes take effect. - ReadonlyMiniLcmApi (renamed from DryRunMiniLcmApi, recording removed) just discards writes and returns a plausible value; reads pass through. - Both dry-run sides are now RecordingMiniLcmApi(inner): the CRDT side wraps the real throwaway copy (writes apply), the fwdata side wraps a ReadonlyMiniLcmApi (writes discarded). Record strings exist once. - DryRunRecord lifted to a standalone type; IDryRunRecorder dropped (only one recorder). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…yMiniLcmApi Match MiniLcmApiWriteNormalizationWrapper: forward IMiniLcmReadApi via a typed [AutoInterface] property (interface inferred from the property type) instead of a typeof + MemberMatch=Any field. Writes stay manual so the compiler enforces every one is handled. The explicit GetEntries workaround is removed: it guarded the CRDT import destination against a missing writing system, but this class only ever wraps fwdata (which always has writing systems), so it was dead here and the reason MemberMatch was needed. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Address review feedback on the dry-run wrappers: - RecordingMiniLcmApi now carries the exact record strings the pre-split DryRunMiniLcmApi produced (verified identical), rather than the terser ad-hoc ones. Each write is the old Add line followed by a forward to the wrapped api. - Forward reads via the read-only [AutoInterface] property (as ReadonlyMiniLcmApi and the other wrappers do) instead of IncludeBaseInterfaces=true. Writes are no longer auto-forwarded, so the compiler enforces that every write is implemented here and thus recorded — nothing can slip through unrecorded (Submit* included). - Rename CrdtProjectsService.OpenProjectCopy to OpenTemporaryProjectCopy so the call site reads as temporary/disposable. CreateEntry forwards the original (possibly null) options — null means "add main publication" to the api, which new CreateEntryOptions() does not — while still logging the same string. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…dry-run wrappers Address review feedback: - Rename ReadonlyMiniLcmApi to WriteIgnoringMiniLcmApi. "Readonly" implies writes are rejected; this class accepts them and does nothing, returning a plausible value so the sync continues. - Type its wrapped api as IMiniLcmReadApi so it structurally can't forward a write, and drop the redundant _api field in favour of the primary-constructor parameter. The two before/after write overloads that shadow that parameter read via the ReadApi property instead. - RecordingMiniLcmApi keeps the read-only [AutoInterface] property: reads are forwarded and not recorded (only writes are), and because writes aren't auto-forwarded the compiler still forces every one to be implemented here and thus recorded. - Comment pass: drop an unverified "delete-wins" claim, correct a stale OpenProjectCopy cref, explain BackupDatabase as "not File.Copy" rather than an unverified WAL-mode detail, and trim the test comments to the gotcha they guard. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…up param - Rename TempCrdtProjectCopy's deleteFiles constructor param to cleanup (more generic). - Note in WriteIgnoringMiniLcmApi.CreateEntry why the IncludeComplexFormsAndComponents branch matters: it returns only what a real create would persist (this is where the fabricated return the old dry-run api produced now lives). - Trim every comment added on this branch to the fewest words that carry the point. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

The dry-run rebinding only swapped crdtApi to the throwaway copy; crdt still pointed at the real project. CrdtRepairs.SyncMissingTranslationIds (which lost its dryRun guard) is passed crdt, so a dry run on a project with a missing translation ID committed SetFirstTranslationIds to the live CRDT — and the copy, snapshotted first, never got the repair, so the prediction diverged from a real sync too. Rebind crdt to the copy in dry run so the repair (and the morph-type read) hit the copy. Regression test: CrdtEntryMissingTranslationId_DryRunSync_LeavesRealCrdtUntouched (fails without this fix). Also from the review: - OpenTemporaryProjectCopy now disposes the scope and deletes the temp file if it throws before handing them to TempCrdtProjectCopy. - TempCrdtProjectCopy.DisposeAsync uses try/finally so cleanup runs even if scope disposal throws. - Update three AGENTS/agent docs that still named the deleted DryRunMiniLcmApi. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…arg, and two DeepSource nits The branch added a CrdtProjectsService parameter to CrdtFwdataProjectSyncService, but SyncWorkerTestHarness builds a Mock<CrdtFwdataProjectSyncService> with the old 3-arg constructor, so Moq couldn't find a matching constructor and every SyncWorkerTests case threw. Pass the extra null! arg. Also from DeepSource: - Drop the unused syncedIdCount local (the repair's return value was never read). - Remove a redundant else-after-return in WriteIgnoringMiniLcmApi.CreateEntry. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

OpenCrdtProject is typed to IMiniLcmApi, but a CRDT project always resolves a CrdtMiniLcmApi (registered directly, no decorators). A temp copy is always a CRDT project, so cast once at that boundary and expose TempCrdtProjectCopy.Api as CrdtMiniLcmApi. The dry-run sync call site no longer casts. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

RecordingMiniLcmApi and WriteIgnoringMiniLcmApi forwarded tasks directly (return _api.X()). Awaiting keeps the wrapper frame on the stack trace when the inner call throws — worth it here since these are dry-run-only diagnostic aids, not a hot path. Task<T> forwarders become `return await`, non-generic Task ones `await`. Record the team convention in backend/AGENTS.md, citing Kevin's rationale on sillsdev#2435. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

…y with TempCrdtProjectCopy Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…g long syncs - FwDataFactory.PreventEviction resets the LcmCache sliding expiration until disposed; used by the sync service so >30-min syncs don't lose the cache mid-run - Log each SyncInternal phase and every 50 synced entries - CrdtRepairs: tolerate an already-patched crdt translation id (interrupted sync) - LcmDebugger: sbe-flex dry-run harness, optional FTS-less registration Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

…bugger generate: builds a deterministic demo project (fwdata + crdt.sqlite + fw_snapshot.json) with a large single-change commit history, a snapshot lagging fwdata by ~10% of entries, and complex-form components among the lagging entries. Entries go through DataModel.AddChanges because the api's AddManyChanges path validates the whole commit history unconditionally; AlwaysValidateCommits is only disabled for generation. sync: runs a FwHeadless-style dry-run sync on a project copy and reports per-phase timing (from the sync service's own phase log messages) plus dry-run record counts, for before/after numbers on optimizations. Fidelity check: a zero-lag generated project dry-run syncs with CrdtChanges 0 / FwdataChanges 0; with lag, changes are exactly the lagging creates and component links. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Generated with seed 42: 10000 entries (1000 lagging from fw_snapshot), 800 synced + 700 lagging complex-form links, 30605 CRDT commits. Fetch with scripts/unpack-demo-project.sh, then: dotnet run --project backend/FwLite/LcmDebugger -- sync slow-sync-demo The archive lives here rather than under deployment/_downloads because that folder is gitignored. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

deepsource-io · 2026-07-29T22:02:24Z

DeepSource Code Review

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deepsource-io · 2026-07-29T22:03:51Z

        }

+        // A sync that outlives the LcmCache's sliding expiration (e.g. paused in a debugger) would otherwise have it disposed mid-sync.
+        using var keepFwdataAlive = fwDataFactory.PreventEviction(fwdata.Project);


Variable 'keepFwdataAlive' is declared but not used

A variable is declared but not used within its scope.
Unused variables can clutter the codebase, reduce readability, and potentially indicate logical errors or incomplete implementations.
If you intend to keep a variable unused intentionally, you can use an underscore (_) as the variable name.

deepsource-io · 2026-07-29T22:03:51Z

+/// </summary>
+public static class DemoProjectGenerator
+{
+    public static async Task Generate(IServiceProvider services, DemoGenOptions opts, ILogger logger)


Method with return type `Task` does not follow the naming convention

The consensus in .NET is to have names of methods dealing with asynchronous operations suffixed with Async. One such example is Stream.ReadAsync from System.IO. Doing so improves readability and provides crucial information at a glance.

deepsource-io · 2026-07-29T22:03:51Z

+        var total = Stopwatch.StartNew();
+        var fwProject = new FwDataProject("fw", opts.OutDir);
+        var fwDataFactory = services.GetRequiredService<FwDataFactory>();
+        using var keepAlive = fwDataFactory.PreventEviction(fwProject);


Variable 'keepAlive' is declared but not used

A variable is declared but not used within its scope.
Unused variables can clutter the codebase, reduce readability, and potentially indicate logical errors or incomplete implementations.
If you intend to keep a variable unused intentionally, you can use an underscore (_) as the variable name.

deepsource-io · 2026-07-29T22:03:51Z

+{
+    public required DemoGenOptions Options { get; init; }
+    public required Guid ProjectId { get; init; }
+    public required PartOfSpeech[] PartsOfSpeech { get; init; }


Property returns an array

Accessors, i.e. getters to be precise, returns a specific value. There are no constraints placed on what a getter can return.
However, in this case, the accessor seems to return an array that is a private field.
In such cases, the returned array may be modified by the user as they are not write-protected.
Instead, it is recommended that you either not return an array or convert this property to a method and return a copy instead.

deepsource-io · 2026-07-29T22:03:52Z

+    public required DemoGenOptions Options { get; init; }
+    public required Guid ProjectId { get; init; }
+    public required PartOfSpeech[] PartsOfSpeech { get; init; }
+    public required SemanticDomain[] SemanticDomains { get; init; }


Property returns an array

Accessors, i.e. getters to be precise, returns a specific value. There are no constraints placed on what a getter can return.
However, in this case, the accessor seems to return an array that is a private field.
In such cases, the returned array may be modified by the user as they are not write-protected.
Instead, it is recommended that you either not return an array or convert this property to a method and return a copy instead.

deepsource-io · 2026-07-29T22:03:52Z

+            OutDir = Path.GetFullPath(Arg("--out") ?? Path.Combine(Utils.GetDefaultDownloadsPath(), "slow-sync-demo")),
+            Seed = int.Parse(Arg("--seed") ?? "42"),
+            TotalEntries = int.Parse(Arg("--entries") ?? "10000"),
+            LagFraction = double.Parse(Arg("--lag") ?? "0.10"),


Consider using `.TryParse` over `Parse`

Methods such as int.Parse and double.Parse throw Exceptions such as ArgumentNullException, ArgumentException, FormatException or OverflowException depending on the input. Incorrectly handling these Exceptions can cause issues during the runtime. It is therefore suggested that you use the safer alternative .TryParse.

deepsource-io · 2026-07-29T22:03:52Z

+            Seed = int.Parse(Arg("--seed") ?? "42"),
+            TotalEntries = int.Parse(Arg("--entries") ?? "10000"),
+            LagFraction = double.Parse(Arg("--lag") ?? "0.10"),
+            UpdateRounds = int.Parse(Arg("--update-rounds") ?? "1"),


Consider using `.TryParse` over `Parse`

Methods such as int.Parse and double.Parse throw Exceptions such as ArgumentNullException, ArgumentException, FormatException or OverflowException depending on the input. Incorrectly handling these Exceptions can cause issues during the runtime. It is therefore suggested that you use the safer alternative .TryParse.

deepsource-io · 2026-07-29T22:03:52Z

+            TotalEntries = int.Parse(Arg("--entries") ?? "10000"),
+            LagFraction = double.Parse(Arg("--lag") ?? "0.10"),
+            UpdateRounds = int.Parse(Arg("--update-rounds") ?? "1"),
+            SyncedLinks = int.Parse(Arg("--synced-links") ?? "800"),


Consider using `.TryParse` over `Parse`

Methods such as int.Parse and double.Parse throw Exceptions such as ArgumentNullException, ArgumentException, FormatException or OverflowException depending on the input. Incorrectly handling these Exceptions can cause issues during the runtime. It is therefore suggested that you use the safer alternative .TryParse.

deepsource-io · 2026-07-29T22:03:52Z

+            LagFraction = double.Parse(Arg("--lag") ?? "0.10"),
+            UpdateRounds = int.Parse(Arg("--update-rounds") ?? "1"),
+            SyncedLinks = int.Parse(Arg("--synced-links") ?? "800"),
+            LaggingLinks = int.Parse(Arg("--lagging-links") ?? "700"),


Consider using `.TryParse` over `Parse`

Methods such as int.Parse and double.Parse throw Exceptions such as ArgumentNullException, ArgumentException, FormatException or OverflowException depending on the input. Incorrectly handling these Exceptions can cause issues during the runtime. It is therefore suggested that you use the safer alternative .TryParse.

deepsource-io · 2026-07-29T22:03:52Z

+/// </summary>
+public static class SyncHarness
+{
+    public static async Task Run(IServiceProvider services,


Method with return type `Task` does not follow the naming convention

The consensus in .NET is to have names of methods dealing with asynchronous operations suffixed with Async. One such example is Stream.ReadAsync from System.IO. Doing so improves readability and provides crucial information at a glance.

…sing Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

deepsource-io · 2026-07-29T22:08:36Z

+    if (raw is null) return fallback;
+    if (int.TryParse(raw, out var value)) return value;
+    Console.Error.WriteLine($"{name} expects an integer, got '{raw}'");
+    Environment.Exit(1);


Calling `Environment.Exit()` may terminate the program in an inconsistent manner

Using Environment.Exit(0) terminates the application abruptly in a potentially unsafe manner. An application should always try to quit gracefully irrespective of whether it encounters an error or not. If your application has to terminate, ensure that it implements the required cleanup/dispose methods to at least safely dispose off the resources that it has acquired/locked to the extent possible and then exit cleanly/gracefully.

deepsource-io · 2026-07-29T22:08:36Z

+    if (raw is null) return fallback;
+    if (double.TryParse(raw, out var value)) return value;
+    Console.Error.WriteLine($"{name} expects a number, got '{raw}'");
+    Environment.Exit(1);


Calling `Environment.Exit()` may terminate the program in an inconsistent manner

Using Environment.Exit(0) terminates the application abruptly in a potentially unsafe manner. An application should always try to quit gracefully irrespective of whether it encounters an error or not. If your application has to terminate, ensure that it implements the required cleanup/dispose methods to at least safely dispose off the resources that it has acquired/locked to the extent possible and then exit cleanly/gracefully.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

myieye · 2026-07-29T22:10:27Z

[Claude, autonomous]

DeepSource triage: fixed the unused using vars, array-returning properties, Parse→TryParse, and the Environment.Exit follow-ups. Skipped deliberately: the two Async-suffix findings (this codebase doesn't use the suffix — CreateEntry, OpenProject, etc.) and the cyclomatic-complexity finding on DemoSpec.Build (a linear spec builder; splitting it would hurt readability). Those can be ignored in the dashboard if you agree.

Generated by Claude Code

myieye · 2026-07-29T22:21:25Z

[Claude, autonomous]

The "Build FW Lite and run tests" failure isn't this branch: the build and both repo checks pass, then the workflow's own sudo timedatectl set-timezone step fails with "Access denied" — a runner-image/permissions issue in a workflow file this branch doesn't touch. It's an upstream workflow that apparently slipped past the disable-on-fork pass (I can't disable workflows from this sandbox), so treating it as expected-fail here; it likely needs re-disabling or an upstream fix.

Generated by Claude Code

…e is 16x Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

myieye · 2026-07-30T00:24:58Z

[Claude, autonomous]

Mission scoreboard (all runs on the demo project, gate identical everywhere: CrdtChanges 2400 / FwdataChanges 0):

change	sync time	avg/record
baseline (NuGet harmony, validation on)	17m28s	437ms
3.1 `AlwaysValidateCommits=false` (PR #9)	15m40s	−10%
3.2 covering indexes	no migration	≤5%, dead end
3.3 harmony `CurrentSnapshotsReferencing` fix (branch `sync-perf-snapshot-lookups`, base a14c5bb)	18m02s → 12m13s	−32%
3.5 temp-copy pragmas (branch pushed, no PR)	17m22s	no effect on NVMe

Details and rationale in backend/FwLite/LcmDebugger/BASELINE.md. The harmony fix is the real win — with it in place, disabling validation adds nothing at this scale. Open items for you: promote the harmony branch to sillsdev/harmony (note: lexbox breaks against harmony ≥aae2ee0 with "ChangeTypeListBuilder is frozen"), and the two dashboard-ignorable DeepSource findings keeping its check red.

Generated by Claude Code

myieye and others added 17 commits July 27, 2026 16:56

Cleanup

0bfadf2

Rename OpenTemporaryProjectCopy to OpenTempProjectCopy for consistenc…

dcdc90f

…y with TempCrdtProjectCopy Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Add pack/unpack scripts for the slow-sync demo project archive

a74a318

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Record slow-sync demo baseline: 17m28s dry run, 437ms per change record

c90b076

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

deepsource-io Bot reviewed Jul 29, 2026

View reviewed changes

Fix DeepSource findings: unused using vars, array properties, arg par…

c68383c

…sing Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

deepsource-io Bot reviewed Jul 29, 2026

View reviewed changes

Throw instead of Environment.Exit on bad CLI args

a1841b7

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

myieye mentioned this pull request Jul 29, 2026

[claude] Make FwHeadless commit-history validation configurable #9

Open

claude added 3 commits July 29, 2026 22:27

Record CurrentSnapshots CTE profile: indexes don't help, query rewrit…

4163cd5

…e is 16x Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Record harmony referencing-fix numbers: 18m02s -> 12m13s (-32%)

d4bdc58

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

Record temp-copy pragma result: no measurable effect on NVMe

cb49117

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01DHonvweBYC4Eo5iNAehfv3

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Variable 'keepFwdataAlive' is declared but not used

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Method with return type `Task` does not follow the naming convention

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Variable 'keepAlive' is declared but not used

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Property returns an array

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Property returns an array

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Consider using `.TryParse` over `Parse`

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Consider using `.TryParse` over `Parse`

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Consider using `.TryParse` over `Parse`

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Consider using `.TryParse` over `Parse`

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Method with return type `Task` does not follow the naming convention

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Calling `Environment.Exit()` may terminate the program in an inconsistent manner

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Calling `Environment.Exit()` may terminate the program in an inconsistent manner

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