symfony-form-types-validation

name	symfony:form-types-validation
allowed-tools	["Read","Write","Edit","Bash","Glob","Grep"]
description	Build Symfony forms with custom Form Types, validation constraints, HTTP 422 handling, and multi-step flows

Form Types Validation (Symfony)

Use when

• Hardening access-control or validation boundaries.
• Aligning voters/security expressions with domain rules.

Default workflow

1. Map actor/resource/action decision matrix.
2. Implement voter/constraint logic at the right boundary.
3. Wire checks at controllers and API operations.
4. Test allowed/forbidden/invalid paths comprehensively.

Guardrails

• Avoid policy logic duplication across layers.
• Do not leak privileged state via error detail.
• Preserve explicit deny behavior for sensitive actions.

Progressive disclosure

• Use this file for execution posture and risk controls.
• Open references when deep implementation details are needed.

Output contract

• Security boundary updates.
• Integration points enforcing decisions.
• Negative-path test results.

References

• reference.md
• docs/complexity-tiers.md