Added the reviewed German district-history sidechain to the 2026 VG250 administrative release.

Added

• Historical districts: Bound 5,135 Kreis-history Admin 3 shapes to BKG source evidence and 938 distinct row-specific date pairs. The declared coverage floor is 1945; it is not a continuous Admin 0-5 history.
• Current administration: Retained the VG250 01.01.2026 Admin 0-5 source edition as the selected spine, with the historical districts kept as a separate family route.

Changes

• Full and downloads: Published the reviewed Full, Display, and three download tiers with the historical family and its source-date qualifications.

Added BKG Kreis boundary history and interoperable temporal geometry.

Added

• families/admin_3/administrative_history: Added BKG VG-Hist Kreis boundary frames from 1945 to the present.
• temporal: Added sourced valid_from and valid_to intervals with deterministic frame selection.

Changes

• downloads: Published synchronized Lite, Display, and Detail 1.3.0 packages with additive GIS fields.

Normalized geometry source and material ownership without changing admitted coverage.

Changes

• source_material_identity: Added source-addressable family-bank and crosswalk lineage, licence policy, and material IDs.
• version_owned_paths: Replaced prior version-owned Full, Display, and reference-partition paths with release-scoped successors while retaining admitted coverage.

DEU geometry 1.2.4 corrects downloadable artifact metadata.

Changes

• downloadable artifact metadata: Corrected archive filenames and download URLs to the retained named ZIPs without changing payload bytes.

detail: pack.zip -> germany-geometry-detail-1.2.3.zip; display_download: pack.zip -> germany-geometry-display-1.2.3.zip; lite: pack.zip -> germany-reference-lite-1.2.3.zip

Current-system baseline reconstructed from admitted release evidence.

Changes

• release: Established the first unified release manifest without changing geometry bytes.

Established a reconstructed historical baseline from retained source evidence.

Changes

• release: Recorded a deterministic pre-ledger baseline.

Established a reconstructed historical baseline from retained source evidence.

Changes

• release: Recorded a deterministic pre-ledger baseline.

Unified Germany with the shared eight-country release workflow.

Changes

• Closed the spine-only country release into the shared Full/Display/download and public-alias contracts.

First German administrative spine release.

Changes

• Published the BKG Admin0-5 hierarchy: 1 country, 16 Admin1, 19 Admin2, 401 Admin3, 1,202 Admin4, and 10,939 Admin5 records.
• Kept explicit gap identities where the official hierarchy omits a level.

_Note: The first retained unified artifact was numbered in the 1.2 line; 1.0.0 is the normalized product-history milestone requested for the changelog._