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feat(plugins): enforce apiVersion; launcher plugins default ON with "none" opt-out

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Two gaps from the MossTank shipment review.

**apiVersion was declared in every manifest and checked by nothing.** The
loader now refuses an unsupported contract BEFORE loading any code from the
plugin — checking after the fact is not equivalent, because by then the
assembly is in a collectible context and the mismatch surfaces as a type-load
or missing-member failure from inside the plugin, which reads like the plugin
is broken rather than built for a different host. PluginApi (Current /
MinimumSupported) lives in Plugin.Abstractions beside the contract it
versions, and the refusal is a distinct PluginApiVersionException so callers
can tell "update the client or the plugin" from "this plugin is broken". The
tests pin the ordering too: a manifest with a future apiVersion AND a missing
dll must fail on the version, a supported one on the dll.

**A launcher-launched client loaded no plugins until the user typed ids.**
LA5 distinguishes an omitted allow-list (load all) from an explicit empty one
(load none); a fresh character profile's list is empty, so it composed to
load-none. Direct launches pass null and load everything -- which is why the
gap never showed in development: the two launch paths disagreed and the
launcher was the one users get. This REVERSES the LA5 default deliberately:
"nothing configured" now composes to the omitted list, so plugins are on by
default, including ones installed later. The opt-out is kept -- losing it
would be a real regression for stripped sessions -- respelled as the literal
id "none", and the launcher's plugin box says so.

The cross-host shared fixture composes its explicit-load-none case through
the new spelling, keeping the reader-side contract tests (App and Headless
both preserve an explicit empty list) exactly as they were.

Complete Release suite: 14,469 tests pass on the standard hermetic lane
filter, 0 failures.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Erik 2026-08-20 21:28:04 +02:00
parent 7e75be23d1
commit cd6eefd0ba
8 changed files with 194 additions and 7 deletions
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10
src/AcDream.Core/Plugins/PluginManifest.cs
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@ -64,6 +64,16 @@ public sealed record PluginManifest(
}
}
/// <summary>
/// A plugin declared a contract version this build cannot load. Distinct from
/// <see cref="PluginManifestException"/> (a malformed manifest) because the
/// remedy differs: this one means update the plugin or the client.
/// </summary>
public sealed class PluginApiVersionException : Exception
{
public PluginApiVersionException(string message) : base(message) { }
}
public sealed class PluginManifestException : Exception
{
public PluginManifestException(string message) : base(message) { }