Standard ERPNext permissions are role-and-DocType shaped: you grant a role read/write/create/delete on a DocType, add User Permissions to fence off records by link field, and lean on Permission Level (permlevel) fields for coarse column control. That works until Finance can see a customer record but must never see its credit_limit, until a regional manager should only touch leads in their own territory group, or until a whole workspace of reports needs to disappear for contractors. At that point admins resort to duplicating DocTypes, hiding fields with brittle client scripts (which never actually secure the data server-side), or over-granting roles and hoping nobody notices. ERPNext core simply runs out of road for least-privilege, per-field, per-record governance.

We build a proper Frappe app (its own module, DocTypes, hooks.py and fixtures) that layers structured, auditable access control on top of ERPNext's native permission engine rather than fighting it. A Field Permission Rule DocType maps role profiles to per-field read/write/mask behavior; enforcement runs server-side in hooks.py doc events (before_save, validate, onload) and in an override of the controlled DocTypes' get_valid_columns/field-fetch path, so masked values never leave the server even via the Frappe REST API, frappe.client.get, list view, or report builder. Record-level rules are evaluated with a whitelisted get_permission_query_conditions hook and a has_permission hook, so filtering happens in the SQL WHERE clause — a user cannot enumerate hidden records by guessing names or paging the /api/resource endpoint. Workspace visibility is driven by role-profile-aware logic that hides or shows Frappe Workspaces and their shortcuts per user without cloning them.

On top of enforcement we build the operational surface admins actually need: a Permission Audit report (Query/Script Report) that resolves, for any user, the effective read/write/mask matrix across the governed DocTypes and flags conflicts; private comments and tagged-visibility controls so notes on a record are only visible to named users or groups; and a scheduled digest (registered as a scheduler_event) that emails owners a weekly summary of permission changes and access-denied events. Every rule change and every enforced denial is written to a log DocType so you have a defensible trail for audit and compliance reviews. Client scripts are used only for UX affordances (greying out masked fields, hiding tabs) — never as the security boundary, which always lives on the server.

Because this is built-to-order, nothing here is a generic download. We start from your real role profiles, the exact DocTypes and fields you need to govern, and your ERPNext version (v15 or v16), then deliver an app tailored to that scope. Typical delivery is one working week from confirmed scope. You get the installable source code for your build, installation and configuration on your bench, technical and end-user documentation, a training session, UAT on a staging site with a tested rollback plan, and a post-go-live support window. ECOSIRE builds it, installs it, and supports it — you are not left to reverse-engineer someone else's marketplace app.