Wist 0.1.0-alpha.6 candidate stability

UniversalToolchain.Wist 0.1.0-alpha.6 is the current source/release candidate for controlled evaluation and prototypes. It is not published on NuGet.org and is not a stable 1.0 compatibility contract. The package currently exercised from NuGet.org remains 0.1.0-alpha.1.

Reviewed first-contact surface

• WistEngine;
• restricted arithmetic and broad native presets;
• Validate, Evaluate, Compile<TDelegate> and TryCompile<TDelegate>;
• stable CLR numeric arguments/results across isolated runtime contexts;
• structured diagnostics, typed metadata and optimization reports;
• exact public API baseline and classified deltas.

Runtime-boundary changes in alpha.6

• process-history-dependent default-context sharing was removed;
• the host registers shared contract assemblies through an immutable snapshot;
• full assembly identity and fail-closed SHA-256 validation bind configured shared copies;
• implementation assemblies remain in collectible isolated load contexts unless explicitly registered;
• hidden application-assembly/default-context fallback is forbidden;
• preload-order, hostile same-name, concurrency, disposal and unload regressions cover the boundary;
• public results normalize implementation-owned numeric values to stable CLR categories;
• package metadata and active documentation are checked against project and package identities.

Verification boundary

The candidate package matrix contains UniversalToolchain.Wist 0.1.0-alpha.6 and UniversalToolchain.Wist.LanguagePack 0.3.0-alpha.5. The exact repository test contract is 1,597 passed, 0 failed and 0 skipped for the pinned verification baseline. Package publication remains a separate operation and was not performed by the candidate verification work.

See the pinned verification snapshot for commit/run identities and the Maintainer and Release Guide for the baseline-bearing package gate.

Not promised

• publication of 0.1.0-alpha.6 on NuGet.org;
• OS/process sandboxing;
• compatibility with every future alpha;
• binary compatibility with pre-hardening runtime assemblies;
• universal near-C# performance;
• complete SSA coverage or an SSA-native backend;
• stable generic language-authoring APIs through the Wist facade.

Promotion rule

Do not describe this candidate as the published package until:

1. the exact package artifact passes the release gates;
2. the package is actually published;
3. the clean-room NuGet.org smoke succeeds for 0.1.0-alpha.6;
4. eng/documentation-release-state.json promotes publishedVersion;
5. public installation commands and evidence links pass the release-state mutants.