v9.0.0

🎉 New Features

• Added DynamoDBAttribute.creator() methods.
• Added support for new connector type AtlanConnectorType.ALLOYDB_POSTGRES.

🧪 Experimental

pyatlan_v9 — Next-generation Pyatlan SDK powered bymsgspec 💪

Introduced pyatlan_v9, a ground-up rebuild of the SDK's data layer replacing Pydantic v1 with msgspec. Ships with full functional parity — models, clients, caches, and serde — while delivering 35-50x faster serialization performance. No implicit validators, fully typed, and extensible by design.

Key design changes:

• All models use msgspec.Struct instead of Pydantic BaseModel
• Explicit UNSET sentinel replaces Pydantic's implicit unset tracking
• omit_defaults=True and rename="camel" handle JSON wire format natively
• Zero runtime validation overhead — type safety enforced at decode time

Benchmark results (Python 3.11, msgspec 0.20.0, macOS):

Operation	msgspec (v9)	Pydantic v1	Speedup
Object creation	1.6–2.3 us	75–102 us	~40-50x
Serialization	0.37–0.42 us	14–17 us	~35-46x
Deserialization	1.7–1.8 us	59–65 us	~35-36x
Round-trip (ser + deser)	2.1–2.2 us	79–85 us	~37-41x

pyatlan_v9 is experimental and ships alongside the stable pyatlan package. APIs may change in future releases.

🥗 QOL Improvements

• Regenerated latest SDK models.
• Switched Claude Code review model to Opus.
• Fixed flaky integration test failures across PR runs.
• Added Claude Code skill (/generate-v9-models) to generate and sync msgspec models for pyatlan_v9.

⛑️ Breaking Changes

• SSOClient.update_group_mapping() now requires group_map_name as a mandatory parameter.
• Atlan tag task response no longer returns classification_id.

Full Changelog: 8.5.3...9.0.0