Project: observer-sessions · Branch: HEAD · Mode: default · Model: claude-haiku-4-5-20251001

Stats: 6 user messages, 0 tool calls, tools used: none.

Conversation

Turn 1 — User

You are a Claude-Mem, a specialized observer tool for creating searchable memory FOR FUTURE SESSIONS.

CRITICAL: Record what was LEARNED/BUILT/FIXED/DEPLOYED/CONFIGURED, not what you (the observer) are doing.

You do not have access to tools. All information you need is provided in <observed_from_primary_session> messages. Create observations from what you observe - no investigation needed.

<observed_from_primary_session>
  <user_request>claude-mem:learn-codebase</user_request>
  <requested_at>2026-05-19</requested_at>
</observed_from_primary_session>

Your job is to monitor a different Claude Code session happening RIGHT NOW, with the goal of creating observations and progress summaries as the work is being done LIVE by the user. You are NOT the one doing the work - you are ONLY observing and recording what is being built, fixed, deployed, or configured in the other session.

SPATIAL AWARENESS: Tool executions include the working directory (tool_cwd) to help you understand:
- Which repository/project is being worked on
- Where files are located relative to the project root
- How to match requested paths to actual execution paths

WHAT TO RECORD
--------------
Focus on durable technical signal:
- What the system NOW DOES differently (new capabilities)
- What shipped to users/production (features, fixes, configs, docs)
- Changes in technical domains (auth, data, UI, infra, DevOps, docs)
- Concrete debugging or investigative findings from logs, traces, queue state, database rows, and code-path inspection

Use verbs like: implemented, fixed, deployed, configured, migrated, optimized, added, refactored, discovered, confirmed, traced

✅ GOOD EXAMPLES (describes what was built or learned):
- "Authentication now supports OAuth2 with PKCE flow"
- "Deployment pipeline runs canary releases with auto-rollback"
- "Database indexes optimized for common query patterns"
- "Observation queue for claude-mem session timed out waiting for an agent pool slot"
- "Fallback processing abandoned pending messages after Gemini and OpenRouter returned 404"

❌ BAD EXAMPLES (describes observation process - DO NOT DO THIS):
- "Analyzed authentication implementation and stored findings"
- "Tracked deployment steps and logged outcomes"
- "Monitored database performance and recorded metrics"

WHEN TO SKIP
------------
Skip routine operations:
- Empty status checks
- Package installations with no errors
- Simple file listings with no follow-on finding
- Repetitive operations you've already documented
- File related research that comes back empty or not found

If skipping, return an empty response only. Do not explain the skip in prose.

OUTPUT FORMAT
-------------
Output observations using this XML structure:

<observation>
  <type>[ bugfix | feature | refactor | change | discovery | decision | security_alert | security_note ]</type>
  
  <title>[title: Short title capturing the core action or topic]</title>
  <subtitle>[subtitle: One sentence explanation (max 24 words)]</subtitle>
  <facts>
    <fact>[Concise, self-contained statement]</fact>
    <fact>[Concise, self-contained statement]</fact>
    <fact>[Concise, self-contained statement]</fact>
  </facts>
  
  <narrative>[narrative: Full context: What was done, how it works, why it matters]</narrative>
  <concepts>
    <co
…(truncated, 1643 more chars)

Turn 1 — Assistant

(empty response - no session activity to observe)

Turn 2 — User

<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:23:18.236Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/api/ElectronicPdfGeneratorAPI.kt\"}"</parameters>
  <outcome>"{\"type\":\"text\",\"file\":{\"filePath\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/api/ElectronicPdfGeneratorAPI.kt\",\"content\":\"package com.doctolib.tpf.digaelectronicfulfillments.domain.api\\n\\nimport com.doctolib.tpf.digaelectronicfulfillments.domain.pdf.models.ElectronicPrescription\\n\\n/\\n  API for electronic PDF generation service. This interface defines the contract for generating\\n  electronic prescription PDFs with QR codes.\\n /\\ninterface ElectronicPdfGeneratorAPI {\\n  /\\n    Generates an electronic prescription PDF with Data Matrix QR codes.\\n   \\n    @param prescription The electronic prescription data\\n    @return The generated PDF as a byte array\\n   /\\n  fun generateElectronicPrescriptionPdf(prescription: ElectronicPrescription): ByteArray\\n}\\n\",\"numLines\":18,\"startLine\":1,\"totalLines\":18}}"</outcome>
</observed_from_primary_session>

Return either one or more <observation>...</observation> blocks, or an empty response if this tool use should be skipped.
Concrete debugging findings from logs, queue state, database rows, session routing, or code-path inspection count as durable discoveries and should be recorded.
Never reply with prose such as "Skipping", "No substantive tool executions", or any explanation outside XML. Non-XML text is discarded.
<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:23:18.237Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/models/CreateCustomVariableCommand.kt\"}"</parameters>
  <outcome>"{\"type\":\"text\",\"file\":{\"filePath\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/models/CreateCustomVariableCommand.kt\",\"content\":\"package com.doctolib.tpf.customvariables.domain.models\\n\\ndata class CreateCustomVariableCommand(\\n    val name: String,\\n    val kind: CustomVariableKind,\\n    val options: List<String>?,\\n    val useDefaultOption: Boolean,\\n    val creatorId: Long,\\n) {\\n  init {\\n    require(name.isNotBlank()) { \\\"name must not be blank\\\" }\\n    require(name.length <= MAX_NAME_LENGTH) { \\\"name must not exceed $MAX_NAME_LENGTH characters\\\" }\\n    when (kind) {\\n      CustomVariableKind.MULTIPLE_CHOICE ->\\n          require(!options.isNullOrEmpty()) {\\n            \\\"options must be a non-empty list when kind is MULTIPLE_CHOICE\\\"\\n          }\\n      CustomVariableKind.DATE -> {\\n        require(options.isNullOrEmpty()) { \\\"options must be empty when kind is DATE\\\" }\\n        require(!useDefaultOption) { \\\"useDefaultOption must be false when kind is DATE\\\" }\\n      }\\n    }\\n  }\\n\\n  companion object {\\n    const val MAX_NAME_LENGTH = 200\\n  }\\n}\\n\",\"numLines\":29,\"startLine\":1,\"totalLines\":29}}"</outcome>
</observed_from_primary_session>

Return either one or more <observation>...</observation> blocks, or an empty response if this tool use should be skipped.
Concrete debugging findings from logs, queue state, database rows, session routing, or code-path inspection count as dur
…(truncated, 149893 more chars)

Turn 2 — Assistant

<observation>
  <type>discovery</type>
  <title>Custom Variables Domain System Architecture</title>
  <subtitle>Practitioner-managed custom variable system with multi-tenant isolation, immutable kind, and PATCH-style updates.</subtitle>
  <facts>
    <fact>CustomVariable supports two kinds: DATE and MULTIPLE_CHOICE with kind-specific validation rules</fact>
    <fact>CreateCustomVariableCommand enforces non-blank name (≤200 chars), non-empty options for MULTIPLE_CHOICE, and empty options for DATE via init{} block</fact>
    <fact>UpdateCustomVariableCommand uses patch semantics: null fields mean no change, merged result validated against existing row state</fact>
    <fact>CustomVariableService enforces immutable kind field: attempting to change kind throws CustomVariableImmutableKindException (422)</fact>
    <fact>Access control: only variable creator can update/delete; actor ID from session, creator ID from persistent row</fact>
    <fact>Repository layer catches DataIntegrityViolationException for unique constraint (name, creatorId) and translates to domain exception</fact>
    <fact>REST endpoints support POST (create, 201), GET (list), PATCH (update, immutable kind check), DELETE (only creator)</fact>
  </facts>
  <narrative>A custom variables system allows practitioners (scoped by creatorId) to define reusable variables for document templates. Variables have immutable types (DATE or MULTIPLE_CHOICE) with type-specific constraints: DATE rows reject options and useDefaultOption flags; MULTIPLE_CHOICE rows require non-empty options. Updates use patch semantics where null fields indicate no change, allowing partial updates. The domain layer validates invariants (name length, option counts) on both creation and update. The service enforces access control and kind immutability. The repository ACL translates database constraint violations into domain-specific exceptions. REST endpoints return C3-compliant enveloped responses with proper HTTP status codes (422 for business rule violations, 403 for access denial, 404 for not found).</narrative>
  <concepts>
    <concept>pattern</concept>
    <concept>how-it-works</concept>
    <concept>what-changed</concept>
  </concepts>
  <files_read>
    <file>backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/models/CustomVariable.kt</file>
    <file>backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/models/CustomVariableKind.kt</file>
    <file>backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/models/CreateCustomVariableCommand.kt</file>
    <file>backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/models/UpdateCustomVariableCommand.kt</file>
    <file>backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/services/CustomVariableService.kt</file>
    <file>backend/custom-variables/custom-variables-domain/src/main/kotlin/com/doctolib/tpf/customvariables/domain/spi/CustomVariableRepositorySpi.kt</file>
    <file>backend/custom-variables/custom-variables-infra/src/main/kotlin/com/doctolib/tpf/customvariables/infra/acl/CustomVariableRepositoryProvider.kt</file>
    <file>backend/custom-variables/custom-variables-infra/src/main/kotlin/com/doctolib/tpf/customvariables/infra/controllers/CustomVariableController.kt</file>
    <file>backend/custom-variables/custom-variables-infra/src/main/kotlin/com/doctolib/tpf/customvariables/infra/controllers/CustomVariableExceptionHandler.kt</file>
    <file>backend/custom-variables/custom-variables-infra/src/main/kotlin/com/doctolib/tpf/customvariables/infra/dto/CreateCustomVariableRequestDto.kt</file>
    <file>backend/custom-variables/custom-variables-infra/src/main/kotlin/com/doctolib/tpf/customvariables/infra/dto/UpdateCustomVariableRequestDto.kt</file>
  </files_read>
  <files_modified>
  </files_modified>
</observation>

<observation>
  <type>discovery</type>
  <title>Electronic PDF Generation and Prescription System</title>
  <subtitle>KBV-compliant electronic prescription PDF generation with Data Matrix codes, template data mapping, and multi-part domain models.</subtitle>
  <facts>
    <fact>ElectronicPrescription domain model includes patient, practitioner, practice, DiGA list (1-3), coverage, taskId, and accessCode</fact>
    <fact>Validation uses Jakarta validation annotations (@NotBlank, @PastOrPresent, @Pattern) with custom ValidationException on violation</fact>
    <fact>ElectronicPrescriptionTemplateData prepared for FTL rendering with base64-encoded Data Matrix images and formatted dates (DD.MM.YYYY)</fact>
    <fact>ElectronicPrescriptionMapper converts domain model to template data, building full names per KBV P62-05/P62-07 order: Title→FirstName→NameSuffix→NamePrefix→LastName</fact>
    <fact>FulfillmentResult sealed class with Success (fulfillmentId + pdfBytes) and Failure (error list)</fact>
    <fact>Data Matrix generation via SPI: Sammelcode (5cm×5cm) for all prescriptions, individual tokens (2.8cm×2.8cm) per DiGA (max 3 per page)</fact>
    <fact>PDF generation via SPI delegates to external pdf-generation module</fact>
  </facts>
  <narrative>The electronic prescription system generates KBV-certified PDFs for DiGA (digital health app) prescriptions. Domain models capture patient, practitioner, and practice information with German field names and codes (KVID, LANR, BSNR, IK). Validation ensures prescription dates are past/present, PZN is 8 digits, LANR/BSNR are 9 digits, and required fields are non-blank. The mapper transforms domain objects into template data suitable for FTL rendering, formatting dates per German convention and building multi-part names per KBV standards. Data Matrix codes are generated at two scales: a Sammelcode containing all prescription tokens, and individual tokens per DiGA. The service orchestrates code generation and PDF rendering via external SPIs.</narrative>
  <concepts>
    <concept>how-it-works</concept>
    <concept>what-changed</concept>
  </concepts>
  <files_read>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/api/ElectronicPdfGeneratorAPI.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/pdf/models/ElectronicPrescription.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/pdf/models/ElectronicPrescriptionTemplateData.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/pdf/resources/ElectronicPrescriptionMapper.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/api/FulfillmentResult.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/exceptions/ValidationException.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/services/ElectronicPdfGeneratorService.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/spi/DataMatrixGeneratorSpi.kt</file>
    <file>backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/spi/ElectronicPdfGeneratorSpi.kt</file>
  </files_read>
  <files_modified>
  </files_modified>
</observation>

<observation>
  <typ
…(truncated, 6136 more chars)

Turn 3 — User

<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:23:23.673Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/spi/GenerateFhirBundle.kt\"}"</parameters>
  <outcome>"{\"type\":\"text\",\"file\":{\"filePath\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/main/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/spi/GenerateFhirBundle.kt\",\"content\":\"package com.doctolib.tpf.digaelectronicfulfillments.domain.spi\\n\\nimport com.doctolib.tpf.digaelectronicfulfillments.domain.bundle.BundleInputData\\n\\n/\\n  SPI for interacting with external modules to fetch and adapt data. This interface will be\\n  implemented by an ACL (Anti-Corruption Layer) in the infra module.\\n /\\ninterface GenerateFhirBundle {\\n  /\\n    Fetches and adapts data from external module/shell.\\n   \\n    @param inputData The input data to be adapted\\n    @param inputData The isSer flag that determines if a patient is special person group BVG (06)\\n    @return AdaptedData containing the transformed data\\n   /\\n  fun fetchAndAdaptData(inputData: BundleInputData, isSer: Boolean): String\\n}\\n\",\"numLines\":19,\"startLine\":1,\"totalLines\":19}}"</outcome>
</observed_from_primary_session>

Return either one or more <observation>...</observation> blocks, or an empty response if this tool use should be skipped.
Concrete debugging findings from logs, queue state, database rows, session routing, or code-path inspection count as durable discoveries and should be recorded.
Never reply with prose such as "Skipping", "No substantive tool executions", or any explanation outside XML. Non-XML text is discarded.
<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:23:23.938Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/rich-text-fulfillments-de/rich-text-fulfillments-de-domain/src/main/kotlin/com/doctolib/tpf/richtextfulfillmentsde/domain/api/ELetterCdaGeneratorAPI.kt\"}"</parameters>
  <outcome>"{\"type\":\"text\",\"file\":{\"filePath\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/rich-text-fulfillments-de/rich-text-fulfillments-de-domain/src/main/kotlin/com/doctolib/tpf/richtextfulfillmentsde/domain/api/ELetterCdaGeneratorAPI.kt\",\"content\":\"package com.doctolib.tpf.richtextfulfillmentsde.domain.api\\n\\nimport com.doctolib.tpf.richtextfulfillmentsde.domain.models.cda.CdaDocumentData\\n\\ninterface ELetterCdaGeneratorAPI {\\n  fun generateELetterCda(documentData: CdaDocumentData): String\\n}\\n\",\"numLines\":8,\"startLine\":1,\"totalLines\":8}}"</outcome>
</observed_from_primary_session>

Return either one or more <observation>...</observation> blocks, or an empty response if this tool use should be skipped.
Concrete debugging findings from logs, queue state, database rows, session routing, or code-path inspection count as durable discoveries and should be recorded.
Never reply with prose such as "Skipping", "No substantive tool executions", or any explanation outside XML. Non-XML text is discarded.
<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:23:24.511Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/diga-electronic-fulfillments/diga-electronic-fulfillments-domain/src/test/kotlin/com/doctolib/tpf/digaelectronicfulfillments/domain/api/FulfillmentResultTest.kt\"}"</p
…(truncated, 513479 more chars)

Turn 4 — User

This session is being continued from a previous conversation that ran out of context. The summary below covers the earlier portion of the conversation.

Summary:
1. Primary Request and Intent:
   No explicit user request is present in the conversation. The conversation consists of observations from a primary session where someone systematically explored a backend codebase by reading 70+ files. The final instruction is to create a comprehensive summary of these observations and the conversation context.

2. Key Technical Concepts:
   - Domain-Driven Design (DDD) patterns with domain services, repositories, and domain models
   - Anti-Corruption Layer (ACL) pattern for integrating with external modules
   - Service Provider Interfaces (SPIs) for abstraction and dependency injection
   - German healthcare regulations and standards (KBV, GKV, eRezept, eAU, DiGA)
   - FHIR (Fast Healthcare Interoperability Resources) bundle generation and validation
   - Data Matrix 2D barcode generation for electronic prescriptions
   - Electronic prescription PDF generation with KBV compliance
   - Multi-tenant custom variables system with creator-scoped access control
   - CDA (Clinical Document Architecture) document generation for electronic letters
   - PATCH-style update semantics with immutable fields
   - Repository pattern with constraint violation translation
   - Exception-based error handling vs Result types
   - Comprehensive Jakarta/Spring validation annotations
   - Base64-encoded image embedding in PDFs and FHIR resources

3. Files and Code Sections:
   The primary session read files across 9+ backend modules:

   Custom Variables Module:
   - CustomVariable.kt - Domain model with immutable kind field, supporting DATE and MULTIPLE_CHOICE types
   - CustomVariableKind.kt - Enum for DATE and MULTIPLE_CHOICE variable types
   - CreateCustomVariableCommand.kt - Command with validation: non-blank name (≤200 chars), non-empty options for MULTIPLE_CHOICE, empty options for DATE
   - UpdateCustomVariableCommand.kt - Patch-style update command with null-means-no-change semantics
   - CustomVariableService.kt - Domain service enforcing access control and immutable kind constraint
   - CustomVariableRepositorySpi.kt - Repository interface for CRUD operations
   - CustomVariableRepositoryProvider.kt - ACL translating DataIntegrityViolationException to DuplicateCustomVariableNameException
   - CustomVariableEntity.kt - JPA entity with UUIDv7 primary key, @PrePersist setting createdAt/updatedAt, @PreUpdate refreshing updatedAt
   - JpaCustomVariableRepository.kt - Spring Data JPA with findByCreatorIdOrderByCreatedAtDesc
   - CustomVariableController.kt - REST endpoints: POST (create, 201), GET (list), PATCH (update), DELETE
   - CustomVariableExceptionHandler.kt - Translates domain exceptions to HTTP status codes (422 for immutable kind, 403 for access denied)
   - CustomVariableResource.kt - DTO with snake_case JSON naming, lowercase kind values ("date"/"multiple_choice")
   - Response.kt - Generic response wrapper with data field
   - CreateCustomVariableRequestDtoTest.kt - Tests snake_case deserialization and enum mapping
   - UpdateCustomVariableRequestDtoTest.kt - Tests partial PATCH body and null pass-through
   - CustomVariableEntityTest.kt - Tests JPA persistence, UUIDv7 generation, JSONB options, unique constraint on (name, creatorId)
   - JpaCustomVariableRepositoryTest.kt - Tests creator-scoped filtering, ordering by createdAt DESC, immutability
   - CustomVariableRepositoryProviderTest.kt - Tests constraint violation translation, DataIntegrityViolationException mapping
   - CustomVariableControllerTest.kt - Comprehensive REST tests: 400 for validation, 422 for duplicates/immutable kind, 403 for access denied, 404 for not found

   DiGA Electronic Fulfillments Module:
   - ElectronicPdfGeneratorAPI.kt - Public API interface for PDF generation
   - ElectronicPrescription.kt - Domain model with validation: patient, practitioner,
…(truncated, 10520 more chars)

Turn 4 — Assistant

I'll create a comprehensive summary of the backend codebase observations systematically organized by module and architectural patterns.

Comprehensive Backend Codebase Summary

Architecture Overview

The codebase follows Domain-Driven Design (DDD) principles with clear separation between:
- Domain layer: Immutable models and business logic enforced through domain services
- Application layer: Use cases and orchestration via services and controllers
- Infrastructure layer: Repository implementations and external integrations via SPIs
- Anti-Corruption Layer (ACL): Provider classes that translate external exceptions and adapt implementations

Core Architectural Patterns

Service Provider Interfaces (SPIs)
- Used for abstraction across modules to enable dependency injection
- Implemented through "Provider" classes that wrap actual implementations
- Allows domain logic to remain independent of technical details

Repository Pattern
- CRUD operations delegated to repository SPIs
- Spring Data JPA implementations with custom queries
- Constraint violation translation from database to domain exceptions
- Creator-scoped filtering for multi-tenant data access

Exception-Based Error Handling
- Domain exceptions (e.g., ValidationException, AccessDeniedException, DuplicateFulfillmentException)
- Translated to HTTP status codes via exception handlers
- Results in semantic HTTP responses: 400 (validation), 403 (access denied), 404 (not found), 422 (unprocessable)

---

Module-by-Module Breakdown

1. Custom Variables Module

Purpose: Multi-tenant custom data fields with creator-scoped access control

Domain Model:
- CustomVariable: Immutable kind field (DATE or MULTIPLE_CHOICE), creator-scoped, timestamps
- Validation: Non-blank name (≤200 chars), non-empty options for MULTIPLE_CHOICE, empty options for DATE

Key Implementation Details:
- PATCH-style updates with null-means-no-change semantics
- UUIDv7 primary keys with @PrePersist/@PreUpdate JPA hooks
- JSONB column storage for options (PostgreSQL)
- Unique constraint on (name, creatorId) pair
- Snake_case JSON serialization with lowercase enum values ("date"/"multiple_choice")

Access Control:
- Creator-scoped queries: findByCreatorIdOrderByCreatedAtDesc
- Exception handler enforces 403 Forbidden for cross-creator access
- 422 Unprocessable Entity for immutable kind modifications

REST API:
POST /custom-variables - Create (201)
GET /custom-variables - List (creator-filtered)
PATCH /custom-variables/{id} - Update with null pass-through
DELETE /custom-variables/{id} - Delete

---

2. DiGA Electronic Fulfillments Module

Purpose: German electronic prescription generation and FHIR bundle creation for Digital Health Applications (DiGAs)

Domain Model - ElectronicPrescription:
- Patient, practitioner, practice, 1-3 DiGAs, coverage, taskId, accessCode
- Validation: PZN format (8 digits), LANR/BSNR (9 digits), past/present dates
- Immutable structure enforced by domain

German Healthcare Compliance:
- KBV P62-05/P62-07 standards for name construction (fullName → full_name, last_name, first_name)
- German date format: DD.MM.YYYY
- Data Matrix 2D barcode generation using ZXing with smart sizing (symbol-width-aligned)
- PDF generation with font size selection (12pt/11pt/10pt) based on content length
- Base64-encoded Data Matrix images embedded in templates

FHIR Bundle Generation:
- Maps domain models to FHIR resources (Patient, Practitioner, Organization, DeviceRequest, Coverage, Composition)
- Two template data classes: BundleGenerationRequestDto and ElectronicPdfRequestDto
- Bidirectional mapping (domain ↔ DTO ↔ FHIR)
- isSer flag detection for KBV insured status (group "06" or checkbox)

Key Technical Details:
- FTL template-based PDF generation
- Data Matrix generators with symbol-width alignment to eliminate centering padding
- Sealed class FulfillmentResult: Success(fulfillmentId, pdfBytes) | Failure(errors)
- @RequiresProAccount annotation on endpoints

---

3. Rich Text Fulfillments Module

Purpose: Electronic letter (eLetter) document generation and transmission

Domain Models:
- ELetterFulfillment: Status, metadata, timestamps, access control
- FulfillmentStatus: AWAITING_FULFILLMENT, IN_PROGRESS, ERROR_ variants, TRANSMITTED
- BirthDatePrecision: FULL_DATE, ONLY_MONTH_AND_YEAR, ONLY_YEAR, UNKNOWN_DATE

CDA Document Generation:
- CdaDocumentData, CdaPatientData, CdaAuthorData, CdaAddressData, etc.
- Sender and recipients metadata tracked per fulfillment type
- Clinical Document Architecture (CDA) compliance for German healthcare

Services:
- ELetterFulfillmentService: Registration, updates, deletion with status enforcement
- RichTextFulfillmentService: Aggregates fulfillments across multiple types
- ELetterFulfillmentCloneService: Cloning during patient operations

Exceptions:
- AccessDeniedException: Patient data access restrictions
- DuplicateFulfillmentException: Concurrent creation prevention
- FulfillmentOperationBlockedException: Prevents modification of transmitted documents
- FulfillmentCloneException: Clone operation failures

---

4. Observation Module (GDT)

Purpose: German Data Transmission (GDT) format configuration for medical device integration

Domain Model:
- GdtConfigurationEntity: Per-organization/workstation settings
  - FilePath, fileName, label, examFields
  - Character spacing, manufacturer, deviceType, gdtVersion
  - monolithGdtInConfigId for linking configurations

Key Details:
- PathNormalizer: Backslash → forward slash conversion, case-lowering, trailing slash trimming
- Preserves UNC prefix (\\server\share) during normalization

---

5. FHIR Mappers Module

Purpose: Mapping domain models to FHIR-compliant resources

FHIR Data Models:
- PatientData: Support for street vs postal addresses
- PractitionerData, OrganizationData, CoverageData, PractitionerRoleData

KBV Profile Mappers:
- KbvForPatientMapper: Maps to KBV_PR_FOR_Patient with maxLength constraints, own-name extensions
- KbvForOrganizationMapper: BSNR/IKNR/Standortnummer priority, Telematik-ID
- KbvForCoverageMapper: GKV extensions (insuredPersonGroup, dmpCode, placeOfResidencePrinciple, insuredPersonStatus)

EAU (Electronic Sick Leave) Mappers:
- ConditionAuMapper: KBV_PR_EAU_Condition_AU with asserted date, seven-weeks flag, employability status
- ConditionIcdMapper: ICD with diagnostic confidence, side localization
- ConditionTextMapper: Free-text diagnosis (max 70 chars)
- ServiceRequestMapper: Steps with date extensions (reintegration, admission, discharge)
- EauCompositionMapper: Sections, legal basis, author/attester, custodian

Comprehensive Validation:
- EauBundleValidator: 952 lines covering:
  - Attester role validation
  - AU type constraints
  - Service request uniqueness
  - Patient birth date requirements
  - PKV-only extension restrictions
  - IK number validation
  - Legal basis enforcement
  - ASV team/group numbers
  - Address and postal code patterns
  - Prüfnummer (verification number) validation

---

6. User Preferences Module

Purpose: User-scoped configuration and preferences

Scope Types:
- IcdCatalogSearchPreferences: FAMILY_DOCTOR_GROUP, ANY_DOCTOR_GROUP, ALPHABETIC, SYSTEMATIC
- MostUsedCodesSuggestionsPreferences: Boolean flag
- PrescriptionSearchPreferences: showDiscountedOnly, showSamples flags
- TherapyPrescriptionPreferences: THERAPY_REPORT/HOME_VISIT enum, priceVisibility, categoryId

Implementation:
- UserPreferenceService: CRUD via repository SPI
- EmptyPreferences: Singleton for scopes without preferences
- SaveUserPreferencesResult: Returns userPreferences and isCreated flag

---

Cross-Cutting Concerns

Data Validation
- Jakarta/Spring validation annotations across all DTOs
- Custom validators for domain
…(truncated, 2379 more chars)

Turn 5 — User

<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:24:05.869Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/rich-text-fulfillments-de/rich-text-fulfillments-de-domain/src/main/kotlin/com/doctolib/tpf/richtextfulfillmentsde/domain/models/ELetterPdf.kt\"}"</parameters>
  <outcome>"{\"type\":\"text\",\"file\":{\"filePath\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/rich-text-fulfillments-de/rich-text-fulfillments-de-domain/src/main/kotlin/com/doctolib/tpf/richtextfulfillmentsde/domain/models/ELetterPdf.kt\",\"content\":\"package com.doctolib.tpf.richtextfulfillmentsde.domain.models\\n\\nimport jakarta.validation.Valid\\nimport jakarta.validation.Validation\\nimport jakarta.validation.Validator\\nimport jakarta.validation.constraints.NotBlank\\nimport jakarta.validation.constraints.NotNull\\nimport java.time.LocalDate\\n\\n/\\n  Domain model for an e-letter (electronic doctor's letter).\\n \\n  This is a self-validating domain model that enforces Jakarta Bean Validation constraints at\\n  construction time. Invalid e-letters cannot be instantiated - the constructor will throw\\n  [ELetterValidationException] if any validation constraints are violated.\\n \\n  The validator factory is initialized lazily once in the companion object and reused across all\\n  instances, ensuring no performance overhead compared to external validation approaches.\\n \\n  This pattern follows the same approach used in prescription-fulfillments domain (see\\n  PaperPrescription.kt) and provides fail-fast guarantees that invalid e-letters cannot exist in\\n  the system.\\n \\n  @property id Unique identifier for the e-letter\\n  @property recipient Information about the recipient doctor/practice\\n  @property sender Information about the sender doctor/practice\\n  @property patient Information about the patient\\n  @property letterDate Date the letter was written\\n  @property letterBody Complete content of the letter (HTML/rich text)\\n  @throws ELetterValidationException if any validation constraints are violated\\n /\\ndata class ELetterPdf(\\n    @field:NotBlank(message = \\\"E-letter ID must not be blank\\\") val id: String,\\n    @field:Valid\\n    @field:NotNull(message = \\\"Recipient information is required\\\")\\n    val recipient: RecipientInfo,\\n    @field:Valid @field:NotNull(message = \\\"Sender information is required\\\") val sender: SenderInfo,\\n    @field:Valid\\n    @field:NotNull(message = \\\"Patient information is required\\\")\\n    val patient: PatientInfo,\\n    @field:NotNull(message = \\\"Letter date is required\\\") val letterDate: LocalDate,\\n    @field:NotNull(message = \\\"Letter body is required\\\") val letterBody: String,\\n) {\\n  companion object {\\n    private val validator: Validator by lazy { Validation.buildDefaultValidatorFactory().validator }\\n  }\\n\\n  init {\\n    val violations = validator.validate(this)\\n    if (violations.isNotEmpty()) {\\n      val errors =\\n          violations.joinToString(\\\"\\\\n\\\") {\\n            \\\"  • ${it.propertyPath}: ${it.message} (got: ${it.invalidValue})\\\"\\n          }\\n      throw ELetterValidationException(\\\"Invalid e-letter:\\\\n$errors\\\")\\n    }\\n  }\\n}\\n\\n/ Information about the e-letter recipient. /\\ndata class RecipientInfo(\\n    @field:NotBlank(message = \\\"Recipient name must not be blank\\\") val name: String,\\n    @field:NotBlank(message = \\\"Recipient email must not be blank\\\") val email: String,\\n)\\n\\n/ Information about the e-letter sender (doctor/practice). /\\ndata class SenderInfo(\\n    @field:NotBlank(message = \\\"Doctor name must not be blank\\\") val doctorName: String,\\n    @field:NotBlank(message = \\\"Specialty must not be blank\\\") val specialty: String,\\n    @field:NotBlank(message = \\
…(truncated, 931870 more chars)

Turn 5 — Assistant

Prompt is too long

Turn 6 — User

<observed_from_primary_session>
  <what_happened>Read</what_happened>
  <occurred_at>2026-05-19T13:25:34.494Z</occurred_at>
  <working_directory>/Users/USER/workspace/doctolib/treatment-plan</working_directory>
  <parameters>"{\"file_path\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/rich-text-fulfillments-de/rich-text-fulfillments-de-infra/src/main/kotlin/com/doctolib/tpf/richtextfulfillmentsde/infra/controllers/BaseExceptionHandler.kt\"}"</parameters>
  <outcome>"{\"type\":\"text\",\"file\":{\"filePath\":\"/Users/USER/workspace/doctolib/treatment-plan/backend/rich-text-fulfillments-de/rich-text-fulfillments-de-infra/src/main/kotlin/com/doctolib/tpf/richtextfulfillmentsde/infra/controllers/BaseExceptionHandler.kt\",\"content\":\"package com.doctolib.tpf.richtextfulfillmentsde.infra.controllers\\n\\nimport com.doctolib.tpf.core.infra.errors.ErrorDetail\\nimport com.doctolib.tpf.core.infra.errors.ErrorsResponse\\nimport com.doctolib.tpf.richtextfulfillmentsde.domain.exceptions.AccessDeniedException\\nimport java.util.UUID\\nimport org.slf4j.Logger\\nimport org.slf4j.LoggerFactory\\nimport org.springframework.http.HttpStatus\\nimport org.springframework.http.MediaType\\nimport org.springframework.http.ResponseEntity\\nimport org.springframework.http.converter.HttpMessageNotReadableException\\nimport org.springframework.web.bind.MethodArgumentNotValidException\\nimport org.springframework.web.bind.MissingServletRequestParameterException\\nimport org.springframework.web.bind.annotation.ExceptionHandler\\nimport org.springframework.web.method.annotation.MethodArgumentTypeMismatchException\\n\\n/\\n  Base exception handler providing common error handling for all controllers.\\n \\n  This class contains the shared error handling logic for common HTTP errors:\\n  - Access denied (403)\\n  - Bean validation failures (400)\\n  - Malformed JSON (400)\\n  - Missing parameters (400)\\n  - Illegal arguments (400)\\n  - Generic exceptions (500)\\n \\n  Controller-specific exception handlers extend this class to inherit common error handling while\\n  adding their own specific handlers.\\n \\n  Each controller has its own @RestControllerAdvice that extends this base class, scoped using\\n  assignableTypes to that specific controller.\\n \\n  Follows C3 REST API Guidelines for error handling.\\n /\\nabstract class BaseExceptionHandler {\\n\\n  protected open val logger: Logger = LoggerFactory.getLogger(this::class.java)\\n\\n  /\\n    Handles access denied exceptions when user doesn't have permission to access patient data.\\n   \\n    Returns 403 Forbidden.\\n   /\\n  @ExceptionHandler(AccessDeniedException::class)\\n  fun handleAccessDeniedException(ex: AccessDeniedException): ResponseEntity<Unit> {\\n    logger.warn(\\n        \\\"Access denied: actor {} cannot access patient {} on behalf of recorder {}\\\",\\n        ex.actorId,\\n        ex.patientId,\\n        ex.recorderId,\\n    )\\n\\n    return ResponseEntity.status(HttpStatus.FORBIDDEN).build()\\n  }\\n\\n  /\\n    Handles Bean Validation (@Valid) failures.\\n   \\n    Returns 400 Bad Request with field-level validation errors.\\n   /\\n  @ExceptionHandler(MethodArgumentNotValidException::class)\\n  fun handleValidationException(\\n      ex: MethodArgumentNotValidException\\n  ): ResponseEntity<ErrorsResponse> {\\n    logger.warn(\\\"Request validation failed: {} field errors\\\", ex.bindingResult.fieldErrorCount)\\n\\n    val errors =\\n        ex.bindingResult.fieldErrors.map { fieldError ->\\n          ErrorDetail(\\n              code = \\\"invalid_field\\\",\\n              message =\\n                  fieldError.defaultMessage ?: \\\"Field '${fieldError.field}' validation failed\\\",\\n              propertyPath = fieldError.field,\\n          )\\n        }\\n\\n    return ResponseEntity.status(HttpStatus.BAD_REQUEST)\\n        .contentType(MediaType.APPLICATION_JSON)\\n        .body(ErrorsResponse(errors))\\n  }\\n\\n  /\\n    H
…(truncated, 15827 more chars)