CohortRetention belongs in your model

Annotate EF Core entities, map categories to rules, and let Cohort preview, sweep and erase rows in PostgreSQL, respecting tenants, holds and the audit trail.

Get Started

Configuration

Annotations declare membership

[Retain(category, anchor)] puts an entity in a category. Unannotated entities are left alone, and the policy lives next to the type it governs.

Rules declare policy

Your IRetentionRuleProvider turns a category into a period, a strategy (purge, soft-delete or anonymise) and an optional legal minimum, per tenant and per moment.

Cohort executes it safely

Batched, tenant-scoped Postgres mutations that skip held rows, write an authoritative audit ledger, and refuse to start on a model they can't execute.

Cohort is a .NET library, not a service. It runs inside your host, against your DbContext, in your database. You own the migration, the rules and the schedule.

Start with Getting Started, then read Retention Rules for how categories, rules and strategies fit together.