feat(customization): complete P02d-3 internal read projections - #24
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Record the accepted PR and merge verification, align current delivery status, and identify the remaining P02d-3 decisions before development. Preserve the dated delivery history and the frozen P02d-1 record.
Record the approved cache, scope and fallback boundaries before readers ship so snapshot consistency and rollback safety are reviewable first. ADR: 0008, 0010, 0040, 0043 Module: Customization, Tenancy
Keep internal reads scoped and uncached while preserving authored locale metadata and the whole-theme grammar for later public projections. ADR: 0008, 0010, 0017, 0040 Module: Tenancy
Remove the second fallback algorithm and stale composition comments so future readers use the accepted resolver and understand ambient scope. ADR: 0008, 0040 Module: Tenancy
Record both independent reviews and align current-state guidance. ADR: 0008, 0040 Module: Tenancy
Resolve exact eligible revision pins with actual display locales on the ambient tenant transaction. Keep schema admission on writers and prove snapshot coherence, isolation and the no-validation guard. ADR: 0010, 0040, 0043 Module: Customization
Cover concrete validator adapters as well as the interface and module helpers. Reconcile the two verified review documentation findings. ADR: 0008, 0040, 0043 Module: Customization, Tenancy
Record fresh approvals and align current implementation status. ADR: 0010, 0040, 0043 Module: Customization, Tenancy
Reuse immutable untranslated families after a fresh durable generation probe. Bypass caching before supported mutations and in rollback-only scopes so speculative values cannot poison reissued generation keys. Prove lifecycle, races, faults, cancellation, tenant separation and composition parity; record seeded SQL plans, volume and local timings. ADR: 0010, 0038, 0040, 0043 Module: Customization, Tenancy
Close the first independent cache review round and record the complete passing Docker rerun and positive TRX populations. Keep Round 2 pending. ADR: 0010, 0038, 0040, 0043 Module: Customization, Tenancy
Record both completed cache review rounds and the unmerged packet. Make old P02d-2 milestone descriptions explicitly historical, preserving accepted decisions and directing the next decision pass to P02d-4. ADR: 0010, 0038, 0040, 0043 Module: Customization, Tenancy
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Included review availability: This review used your included allowance. 3 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughThis change adds typed tenant-settings reads and internal Customization display projections. It adds locale-aware labels, exact-revision lookup, generation-based caching, transaction-scoped cache bypass, service registrations, validation tests, and architecture and delivery records. ChangesTenant-scoped read internals
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant Caller
participant CustomizationDefinitionProjectionReader
participant DefinitionSnapshotStore
participant DefinitionFamilyCache
participant PostgreSQL
Caller->>CustomizationDefinitionProjectionReader: ReadAsync(request)
CustomizationDefinitionProjectionReader->>DefinitionSnapshotStore: Probe durable generation
DefinitionSnapshotStore->>PostgreSQL: Read generation
PostgreSQL-->>DefinitionSnapshotStore: Generation
DefinitionSnapshotStore-->>CustomizationDefinitionProjectionReader: Generation
CustomizationDefinitionProjectionReader->>DefinitionFamilyCache: Read tenant and generation families
alt Cache miss or bypass
DefinitionFamilyCache-->>CustomizationDefinitionProjectionReader: No usable snapshot
CustomizationDefinitionProjectionReader->>DefinitionSnapshotStore: Load coherent snapshot
DefinitionSnapshotStore->>PostgreSQL: Read generation and definition families
PostgreSQL-->>DefinitionSnapshotStore: Snapshot rows
DefinitionSnapshotStore-->>CustomizationDefinitionProjectionReader: DefinitionSnapshot
CustomizationDefinitionProjectionReader->>DefinitionFamilyCache: Write snapshot when permitted
else Cache hit
DefinitionFamilyCache-->>CustomizationDefinitionProjectionReader: Cached snapshot
end
CustomizationDefinitionProjectionReader-->>Caller: Exact projection with localized labels and missing pins
Merge Risk: ⚪ Minimal · up to No actionable issue remains on the supplied evidence; this change is mergeable after normal checks. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 9.86% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 142 functions across 33 files. (1 skipped: 1 unsupported.)
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Review comments at @docs/modules/education/README.md:
- Around line 14-16: Update the P02d-3 status in the education README to record
it as complete and unmerged, and identify P02d-4 as next.
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- Around line 54-55: Add a period after “both review rounds passed” in the Step
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CLAUDE.mdREADME.mdbackend/src/LearnStack.Api/Composition/PersistenceCompositionExtensions.csbackend/src/LearnStack.Infrastructure/Caching/InMemoryCacheService.csbackend/src/LearnStack.SharedKernel/Localization/LocalizedText.csbackend/src/LearnStack.SharedKernel/Localization/ResolvedLocalizedText.csbackend/src/LearnStack.SharedKernel/Persistence/IUnitOfWork.csbackend/src/LearnStack.Tools.Seeder/SeedComposition.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Application.Contracts/Definitions/ICustomizationDefinitionProjectionReader.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/CustomizationReadRegistration.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Persistence/CustomizationGenerationStore.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Persistence/CustomizationWriteStores.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/CustomizationDefinitionProjectionReader.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/CustomizationReadState.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/DefinitionFamilyCache.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/DefinitionSnapshot.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/DefinitionSnapshotStore.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Application.Contracts/Settings/ITenantSettingsAccessor.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Application/Branding/BrandingThemeRegistry.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Application/Settings/TenantSettingRegistry.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Infrastructure/Persistence/TenantSettingsAccessor.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Infrastructure/TenantSettingsRegistration.csbackend/tests/LearnStack.Tests.Architecture/CustomizationProjectionTests.csbackend/tests/LearnStack.Tests.Architecture/Il.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationCatalogTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationProjectionCacheTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationProjectionCompositionTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationProjectionTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationPublicationConcurrencyTests.csbackend/tests/LearnStack.Tests.Integration/Database/TenantSettingsAccessorTests.csbackend/tests/LearnStack.Tests.Integration/Database/WriteStoreConflictTests.csbackend/tests/LearnStack.Tests.Unit/Infrastructure/Caching/InMemoryCacheServiceTests.csbackend/tests/LearnStack.Tests.Unit/Modules/Tenancy/TenantSettingsTests.csbackend/tests/LearnStack.Tests.Unit/SharedKernel/Localization/LocalizedTextTests.csdocs/architecture/09-tenant-isolation.mddocs/architecture/12-localization.mddocs/architecture/32-tenant-customization-model.mddocs/glossary.mddocs/modules/customization/README.mddocs/modules/customization/audit.mddocs/modules/customization/permissions.mddocs/modules/education/README.mddocs/modules/tenancy/README.mddocs/modules/tenancy/audit.mddocs/modules/tenancy/permissions.mddocs/roadmap/README.mddocs/roadmap/phase-02d-walking-skeleton.mddocs/standards/08-localization.mddocs/standards/10-observability.mddocs/standards/15-performance.mddocs/standards/20-infrastructure-stack.mddocs/standards/21-architecture-tests-catalogue.md
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Fix two verified post-PR documentation findings without changing source: Education now names P02d-3 complete and unmerged, with P02d-4 next. Module: Customization, Tenancy, Education
Follow projection helpers across production assemblies and close metadata escapes with planted controls. Refuse malformed setting tokens and detached contexts, preserve recoverable cache fallback, and propagate fatal faults. Keep immutable cached values and branding keys single-sourced. Make concurrent cold-load evidence deterministic and correct the local median calculation. Align editable scope and current-state documentation; preserve accepted answers and historical delivery records. Validated: Release build 0 warnings/errors; 2642 tests pass, no skips; format, links/fragments and deliberate guard mutation checks pass. ADR: 0040, 0043 Module: Customization, Tenancy
Record both fresh independent correction review rounds. Qualify cache consistency by the canonical per-family policy, preserving L1-only and uncached families instead of generalizing L2 invalidation to all keys. The reviewed backend is unchanged. Local validation remains 2642 passing cases with no skips; all required CI checks and CodeRabbit passed on the reviewed code head. Final documentation-head checks follow this commit. ADR: 0040, 0043 Module: Customization, Tenancy
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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Inline comments:
Review comments at
@backend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Infrastructure/Persistence/TenantSettingsAccessor.cs:
- Around line 35-53: Update the parsing flow in TenantSettingsAccessor so JSON
shape exceptions from registration.Parse(selected.Value), including
JsonException and InvalidOperationException, return Invalid<T>() instead of
propagating. Preserve the existing handling of unsuccessful parse results.
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CLAUDE.mdREADME.mdbackend/src/LearnStack.Api/Composition/PersistenceCompositionExtensions.csbackend/src/LearnStack.Infrastructure/Caching/InMemoryCacheService.csbackend/src/LearnStack.SharedKernel/Localization/LocalizedText.csbackend/src/LearnStack.SharedKernel/Localization/ResolvedLocalizedText.csbackend/src/LearnStack.SharedKernel/Persistence/IUnitOfWork.csbackend/src/LearnStack.Tools.Seeder/SeedComposition.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Application.Contracts/Definitions/ICustomizationDefinitionProjectionReader.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/CustomizationReadRegistration.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Persistence/CustomizationGenerationStore.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Persistence/CustomizationWriteStores.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/CustomizationDefinitionProjectionReader.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/CustomizationReadState.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/DefinitionFamilyCache.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/DefinitionSnapshot.csbackend/src/Modules/Customization/LearnStack.Modules.Customization.Infrastructure/Projections/DefinitionSnapshotStore.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Application.Contracts/Settings/ITenantSettingsAccessor.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Application/Branding/BrandingThemeRegistry.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Application/Settings/TenantSettingRegistry.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Infrastructure/Persistence/TenantSettingsAccessor.csbackend/src/Modules/Tenancy/LearnStack.Modules.Tenancy.Infrastructure/TenantSettingsRegistration.csbackend/tests/LearnStack.Tests.Architecture/CustomizationProjectionTests.csbackend/tests/LearnStack.Tests.Architecture/Il.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationCatalogTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationProjectionCacheTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationProjectionCompositionTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationProjectionTests.csbackend/tests/LearnStack.Tests.Integration/Database/CustomizationPublicationConcurrencyTests.csbackend/tests/LearnStack.Tests.Integration/Database/TenantSettingsAccessorTests.csbackend/tests/LearnStack.Tests.Integration/Database/WriteStoreConflictTests.csbackend/tests/LearnStack.Tests.Unit/Infrastructure/Caching/InMemoryCacheServiceTests.csbackend/tests/LearnStack.Tests.Unit/Modules/Tenancy/TenantSettingsTests.csbackend/tests/LearnStack.Tests.Unit/SharedKernel/Localization/LocalizedTextTests.csdocs/architecture/02-domain-model.mddocs/architecture/09-tenant-isolation.mddocs/architecture/12-localization.mddocs/architecture/32-tenant-customization-model.mddocs/glossary.mddocs/modules/customization/README.mddocs/modules/customization/audit.mddocs/modules/customization/permissions.mddocs/modules/education/README.mddocs/modules/tenancy/README.mddocs/modules/tenancy/audit.mddocs/modules/tenancy/permissions.mddocs/roadmap/README.mddocs/roadmap/phase-02d-walking-skeleton.mddocs/standards/08-localization.mddocs/standards/10-observability.mddocs/standards/15-performance.mddocs/standards/20-infrastructure-stack.mddocs/standards/21-architecture-tests-catalogue.md
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Account for the bounded SQL envelopes around accepted source JSON so cold and partial reads cannot fail on unrelated valid definitions. Refuse selected setting parser shape errors without tenant fallback. Prove both defects and the unchanged source limits through real app-role PostgreSQL; retain cancellation and unrelated parser failures. ADR: 0010, 0040, 0043 Module: Customization, Tenancy
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Summary
Approach
Every batch freshly probes the durable tenant generation. Warm reads issue one SELECT; cold, partial-hit and cache-fault reads issue at most two. The miss statement returns generation, both eligible revision families and bands together. Labels resolve per call, so locale does not partition the untranslated cache.
Supported Customization stores and generation bumps mark a sticky scoped state before mutation. Dirty or rollback-only scopes bypass cache get and set, preventing rolled-back speculative values from contaminating a later reissued generation. Cache calls are awaited inside the caller's lifetime; no ambient loader enters a shared factory flight. Both API and Seeder roots use the same registration helpers.
Tests
79d1539c681e5188ae57fb3af47bdf6f5049990a(head CI) and merge commitd1a47369d82f8b6d91cb325f56d4c42382ec77b6(merge CI). Their trees are identical. CodeRabbit check is successful and there are no unresolved review threads.825e4f5: round 1 found no issue; round 2 found one verified cache-policy documentation Minor, fixed in that commit. The later depth/settings review findings and their regression proof are recorded below.Local seeded measurements use 20 observations after warmup, app-role PostgreSQL, two content types/two taxonomies/nine bands and a 1984-byte UTF-8 statement JSON payload. The earlier historical table used upper medians and now carries a dated erratum. The corrected sample averages the two middle observations: cold median 0.738 ms, warm median 0.209 ms including the mandatory probe, typed setting median 0.235 ms. Actual EXPLAIN plans use the generation PK and tenant/revision/band indexes. This is a small local sample, not production p95 evidence or managed-heap measurement.
The correction also adds malformed setting-token and detached-context refusals, propagates fatal process errors while preserving recoverable cache fallback, shares the branding key, removes redundant cached revisions, and proves independent cold loads with a snapshot barrier. Malformed band labels omit their exact taxonomy pin and preserve neighbors. Current-state documentation is synchronized without reopening accepted gates.
The final correction in
79d1539preserves accepted source JSON depth 64 while accounting for the SQL envelope: bounded snapshot limits are 66 for content types and 68 for taxonomy bands. It also converts onlyJsonException/InvalidOperationExceptionfrom the selected settings parser into the existing invalid result, without tenant fallback. Nine new real-PostgreSQL cases cover accepted depth boundaries, raw-65 write refusal, unrelated cold pins, warm/partial-cache reads, malformed selected settings and non-shape exception propagation. Before the correction, seven parser regressions failed as expected and two exception-propagation controls passed; all nine now pass. No admission, schema, migration or public API contract changed.Risk
Merge closeout
Two additional fresh correction/closeout review rounds (GPT-6-astra and GPT-6.1-sol, xhigh) are complete. Round 1 approved the source correction and identified one incomplete P02d-4 prerequisite-summary Minor; the closeout now links the canonical complete packet gate table. Round 2 returns Standards Pass and Code Review Approve with no actionable findings. Reviewers inspected stored execution evidence and live merge/check metadata, without rerunning builds/tests.
Merged by the maintainer on 2026-10-03. P02d-3 is complete; Phase 02d remains in progress. P02d-4 owns public reads and begins with its pending decision pass. The closeout links the complete canonical prerequisites rather than accepting new decisions. P02d-5/6/7 retain SSR, public rendering and demo/phase-exit ownership.
Related
P02d-3 merge and closeout
P02d-3 decision package and delivery
Customization cache strategy
Typed settings contract
Localization fallback
ADR-0010, ADR-0038, ADR-0040 and ADR-0043; Standards 05, 08, 10, 15, 20 and 21.
Prepared with Codex.
Summary by CodeRabbit