Register change types through model versions only by myieye · Pull Request #145 · sillsdev/harmony

myieye · 2026-10-19T12:34:18Z

[Claude, autonomous]

Makes model versions the only way to register change types: ChangeTypeListBuilder is gone, and RemoteResourceChanges<TMetadata>() registers the remote resource types like Change<T>().

Breaking for apps (they drop their ChangeTypeListBuilder.Add calls), so it should merge before a NuGet release.
Startup fails if AddCrdtRemoteResources<T> and RemoteResourceChanges<T> disagree on the metadata type or only one is called, and when a version lists a type under a discriminator another type already uses.

🤖 Generated with Claude Code

coderabbitai · 2026-10-19T12:35:34Z

Walkthrough

Change types are now registered through model versions instead of ChangeTypeListBuilder. Remote-resource change registration is parameterless and uses metadata-independent discriminators. Configuration combines model-version and remote-resource change types, and duplicate discriminators produce an InvalidOperationException. The change removes validation that required model-version change types to appear in a separate registration list. Tests, sample configuration, and documentation now use the updated APIs.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Merge Risk: 🔵 Low · up to c4061

Change types are now registered only through model versions, and the remote-resource API is simplified. One narrow regression remains. If remote resources are enabled after the serializer has already been built, the configuration silently accepts the call instead of failing. Remote-resource changes saved after that may not be readable later. The fix is a small guard, so this is suitable to merge after that follow-up.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 25.71% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 35 functions across 7 files. (2 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Title check		The title clearly and concisely states the primary change: change types are registered through model versions only.
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description check		The pull request description directly matches the changes. It describes the removal of ChangeTypeListBuilder, model-version-only change registration, the RemoteResourceChanges() API change, breaking a…

Full details: Description check

Explanation

The pull request description directly matches the changes. It describes the removal of ChangeTypeListBuilder, model-version-only change registration, the RemoteResourceChanges() API change, breaking application updates, and duplicate-registration validation.

Full details: Docstring Coverage

Explanation

Docstring coverage is 25.71% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 35 functions across 7 files. (2 skipped: 2 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

✨ Finishing Touches: 💡 1

📝 Generate docstrings: 💡

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Inline comments:
Review comments at @src/SIL.Harmony/Config/HarmonyConfig.cs:
- Line 221: Update the AddRemoteResourceEntity<TMetadata> flow before assigning
_remoteResourceChangeTypes: detect whether the discriminator maps have already
been built through the exposed JsonSerializerOptions configuration lifetime, and
throw to reject registration in that state. Preserve registration when the maps
are not yet built and keep the existing assignment unchanged.

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Run ID: 2069d70f-5f95-40d4-a580-5e2050935c1e

📥 Commits

Reviewing files that changed from the base of the PR and between a002af1 and c4061c8.

📒 Files selected for processing: 12

AGENTS.md
README.md
src/SIL.Harmony.Sample/CrdtSampleKernel.cs
src/SIL.Harmony.Tests/Adapter/CustomObjectAdapterTests.cs
src/SIL.Harmony.Tests/ConfigTests.cs
src/SIL.Harmony.Tests/ModelVersionTests.cs
src/SIL.Harmony.Tests/PersistExtraDataTests.cs
src/SIL.Harmony/Config/ChangeTypeListBuilder.cs
src/SIL.Harmony/Config/HarmonyConfig.cs
src/SIL.Harmony/Config/ModelVersionBuilder.cs
src/SIL.Harmony/Config/ModelVersionsValidator.cs
src/SIL.Harmony/CrdtKernel.cs

💤 Files with no reviewable changes: 3

src/SIL.Harmony.Tests/PersistExtraDataTests.cs
src/SIL.Harmony.Tests/Adapter/CustomObjectAdapterTests.cs
src/SIL.Harmony/Config/ChangeTypeListBuilder.cs

Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review.

HarmonyConfig.ChangeTypes is now the types listed with Change<T>() across all model versions, plus the remote resource types AddCrdtRemoteResources registers, so ChangeTypeListBuilder is gone and apps no longer keep two lists that had to match. RemoteResourceChanges() lists the remote resource discriminators, which don't depend on the metadata type. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

hahn-kev · 2026-10-21T04:40:28Z

                .Change<DeleteChange<Tag>>()
-                //registered by AddCrdtRemoteResources
-                .RemoteResourceChanges<MediaMetadata>());
+                .RemoteResourceChanges());


what happens here if we add a new resource change? this was probably relevant before now too

Yeah, good question. I hadn't thought of new change types, but my design in #141 would handle both new and bumped changes, by putting them in a new harmony version that you reference when you call e.g. RemoteResourceChanges(HarmonyVersion.V2).

hahn-kev · 2026-10-21T04:47:06Z

    /// </summary>
    public ModelVersionBuilder ModelVersionBuilder { get; } = new();
+    public IReadOnlyList<RegisteredChangeType> ChangeTypes => [.. ModelVersionBuilder.ChangeTypes.Union(_remoteResourceChangeTypes)];
+    private RegisteredChangeType[] _remoteResourceChangeTypes = [];


I don't understand why we need this special case, the remote resource change types must be declared in the model version.

I had to decide between:

Only declare the metadata type once

Declare the metadata type twice and validate that they're the same

I had 2, then switch to 1, but I think I'll go back to 1 😆.

[Claude, autonomous]

Done in 405aa3f2: RemoteResourceChanges<TMetadata>() registers the types again, and startup fails if its metadata type doesn't match AddCrdtRemoteResources<TMetadata>.

RemoteResourceChanges<TMetadata>() registers the five types like Change<T>(), so model versions are the only registration path. The validator checks AddCrdtRemoteResources and RemoteResourceChanges use the same metadata type or are both absent; this drops the union in ChangeTypes, the NoMetadata stand-in and the CheckFrozen guard. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

myieye mentioned this pull request Oct 19, 2026

Model Version support #135

Merged

17 tasks done

myieye force-pushed the claude/model-versions-register-change-types branch from d930b76 to 70fa783 Compare October 20, 2026 10:59

myieye added this pull request to stack #147 October 20, 2026 11:02

myieye mentioned this pull request Oct 20, 2026

Reject authoring a change whose type isn't registered #146

Open

myieye force-pushed the claude/model-versions-register-change-types branch 3 times, most recently from 79587ac to c4061c8 Compare October 20, 2026 12:46

myieye changed the title ~~[claude] Register change types through model versions only~~ Register change types through model versions only Oct 20, 2026

myieye requested a review from hahn-kev October 20, 2026 12:57

myieye marked this pull request as ready for review October 20, 2026 12:57

coderabbitai Bot reviewed Oct 20, 2026

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Comment thread src/SIL.Harmony/Config/HarmonyConfig.cs Outdated

myieye force-pushed the claude/model-versions-register-change-types branch from c4061c8 to 575e1a9 Compare October 20, 2026 13:09

hahn-kev reviewed Oct 21, 2026

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Register change types through model versions only - #145

Register change types through model versions only#145
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myieye commented Oct 19, 2026 •

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