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govoplan-postbox/README.md

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# govoplan-postbox
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**Repository type:** module (domain).
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GovOPlaN Postbox provides platform-owned postboxes for internal work, portals,
campaign flows, and function-bound organizational communication.
## Ownership
This repository owns:
- backend module manifest `postbox`
- postbox permissions and policy checks
- postbox, binding, message, participant, attachment-reference, and audit-facing data models
- function-organization-bound access resolution for postboxes through
normalized Identity, IDM, Organizations, and Core/Access contracts
- API routes for postbox directory, messages, access checks, and administration
- optional integration capabilities for campaign, files, portal, notification, and mail-facing workflows
- future WebUI package `@govoplan/postbox-webui`
Core owns auth, tenants, RBAC evaluation, database/session primitives, module
discovery, migrations, CSRF/API helpers, and shell layout. Identity owns
identities and account links. Organizations owns units, structures, function
types, and concrete functions. IDM owns effective identity-to-function
assignments, delegation, and acting-for facts. Access owns generic application
roles, permissions, and administrative RBAC surfaces.
## Function-bound postboxes
A function-bound postbox has a stable institutional address linked to an
organizational unit and one or more functions. It can exist with zero, one, or
several current incumbents. A person can access it only while their identity
has an effective assignment or time-bounded delegation in that organizational
context and their account may perform the relevant Postbox action. Access is
not tied to a login mailbox, personal email address, static user assignment, or
function-to-RBAC-role mapping.
When the assignment changes, postbox access and encrypted key grants change
with it. The postbox keeps durable content and evidence history through
vacancy, hand-over, and delegation; multiple incumbents receive independently
auditable access. Revocation prevents future platform key access but cannot
erase plaintext already fetched or exported.
Reusable Postbox templates may target a function type and organization scope.
Unit-specific addresses are resolved lazily and remain stable through vacancy
and reassignment. Exact postboxes remain available for exceptional
responsibilities or case/service contexts.
Users holding several functions may group selected postboxes into unified
inbox views. These are query projections only: messages, address, read state,
retention, and evidence remain attached to their source postboxes.
Hierarchy propagation is off by default. Explicit copy, attention/escalation,
and shared-visibility rules are distinct, bounded, classification-aware, and
snapshotted when a message is delivered.
## Module integration
Backend entry point:
```toml
[project.entry-points."govoplan.modules"]
postbox = "govoplan_postbox.backend.manifest:get_manifest"
```
Frontend package:
```text
@govoplan/postbox-webui
```
Platform RBAC, module capability contracts, and governance rules are documented in `govoplan-core/docs/`.