# GovOPlaN Compatibility Inventory

This inventory classifies compatibility paths covered by
`COMPATIBILITY_POLICY.md`. It is intentionally limited to behavior that changes
accepted data, imports, permissions, or migration state. Operational fallbacks
such as Redis degradation and language fallback are not compatibility paths.

## Database Bridges

| Path | Purpose | Retention | Removal |
| --- | --- | --- | --- |
| `govoplan_core.db.migrations.reconcile_legacy_create_all_schema` | Reconciles databases created before Alembic ownership was recorded. | At least one major release after runtime aliases are removed. | Review after `1.0`; keep release-baseline tests. |
| Migration table/column aliases in `govoplan_core.db.migrations` | Detect and reconcile pre-split table ownership and migration tracks. | All tagged `0.1.x` upgrade origins plus one major release cycle. | Remove only after the corresponding baseline leaves support. |
| Access and module migration backfills for legacy permission names | Converts persisted role assignments without dropping authority. | Same as the database upgrade origin that contains the old role. | Keep migrations immutable; remove only runtime expansion at `0.2`. |

## Portable-Schema Readers

| Path | Purpose | Retention | Removal |
| --- | --- | --- | --- |
| `govoplan_core.mail.config.normalize_split_transport_credentials` | Reads pre-split SMTP/IMAP credentials and emits the split representation. | Current and previous two configuration schema versions. | Version-gate once Mail writes an explicit current schema version; reject inputs older than the two-version window. |
| `ImapServerConfig.discard_legacy_enabled` | Reads the former nested IMAP `enabled` field without writing it. | Current and previous two configuration schema versions. | Remove with the oldest accepted Mail configuration schema. |
| `govoplan_core.core.configuration_packages` readers | Reads explicitly versioned configuration-package manifests. | Current and previous two schema versions. | Retire individual readers as their version leaves the window. |

## Runtime And API Aliases

| Path | Purpose | Retention | Removal |
| --- | --- | --- | --- |
| `govoplan_core.security.scope_aliases.LEGACY_SCOPE_ALIASES` | Expands pre-granular permission names. | Tagged `0.1.x` runtime/API window. | Remove at `0.2` after role backfills and migration notes are verified. |
| `govoplan_core.security.module_permissions.LEGACY_TO_MODULE_SCOPES` | Maps pre-module-split scopes to canonical owning-module scopes. | Tagged `0.1.x` runtime/API window. | Remove at `0.2`; keep database migration evidence for one major cycle. |
| `govoplan_core.privacy.retention` | Stable import facade delegating policy-owned behavior through a capability. | Tagged `0.1.x` import window. | Remove at `0.2` after all in-tree callers use the policy contract and release notes name the replacement. |
| Legacy tenant aliases in API response schemas | Preserves active-tenant response fields used by `0.1.x` clients. | Tagged `0.1.x` API window. | Remove at `0.2` with response-schema migration notes. |
| Optional fields in Poll response references | Accepts providers built against the earlier Poll contract. | Tagged `0.1.x` runtime contract window. | Remove or require a new interface version at `0.2`. |
| Legacy single-tenant summary providers | Allows modules without the batch provider introduced in `0.1.x`. | Tagged `0.1.x` module contract window. | Remove at `0.2` after manifests advertise the batch provider contract. |

## Removed Paths

| Path | Reason | Removed |
| --- | --- | --- |
| `govoplan_core.core.module_installer._run_restart_command_legacy` | Private wrapper had no callers and never represented a persisted or published contract. | Current development line |
| Retired `govoplan_core.api.admin` and pre-split core model imports | In-tree callers and module packages use their owning modules; regression tests prohibit reintroduction. | Before `0.1.10` |

Every new compatibility path must be added here with its classification,
diagnostic, test owner, and planned removal release.