Design Value Objects for domain concepts and DTOs for data transfer with proper immutability (readonly) and validation
Scanned 8/31/2026
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---
name: symfony:value-objects-and-dtos
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description: Design Value Objects for domain concepts and DTOs for data transfer with proper immutability (readonly) and validation
---
# Value Objects And Dtos (Symfony)
## Use when
- Refining architecture/workflows/context handling in Symfony projects.
- Planning and executing medium/complex changes safely.
## Default workflow
1. Establish current boundaries, constraints, and coupling points.
2. Propose smallest coherent architectural adjustment.
3. Execute in checkpoints with validation at each stage.
4. Summarize tradeoffs and follow-up backlog.
## Guardrails
- Use existing project patterns by default.
- Avoid broad refactors without explicit need.
- Keep decision log clear and auditable.
## Progressive disclosure
- Use this file for execution posture and risk controls.
- Open references when deep implementation details are needed.
## Output contract
- Architecture/workflow changes.
- Checkpoint validation outcomes.
- Residual risks and next steps.
## References
- `reference.md`
- `docs/complexity-tiers.md`
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