# Symfonydoctrine Batch Processing > Evolve Symfony Doctrine models and schema safely with integrity, performance, and rollout discipline. Use for doctrine batch processing tasks. Use when this capability is needed. - Skill: `tomevault-io/symfonydoctrine-batch-processing` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/symfonydoctrine-batch-processing` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/symfonydoctrine-batch-processing/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/symfonydoctrine-batch-processing --- # Doctrine Batch Processing (Symfony) ## Use when - Designing entity relations or schema evolution. - Improving Doctrine correctness/performance. ## Default workflow 1. Model ownership/cardinality and transactional boundaries. 2. Apply mapping/schema changes with migration safety. 2. Tune fetch/query behavior for hot paths. 2. Verify lifecycle behavior with targeted tests. ## Guardrails - Keep owning/inverse sides coherent. - Avoid destructive migration jumps in one release. - Eliminate accidental N+1 and over-fetching. ## Progressive disclosure - Use this file for execution posture and risk controls. - Open references when deep implementation details are needed. ## Output contract - Entity/migration changes. - Integrity and performance decisions. - Validation outcomes and rollback notes. ## References - `reference.md` - `docs/complexity-tiers.md` --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/makfly) — claim your Tome and manage your conversions.