chDB Files

chdb 4.2.1

Requires chdb-core>=26.5.0.

New

• clickhouse-connect backend (#593) — use chDB as a drop-in execution backend for clickhouse-connect: clickhouse_connect.get_client("chdb://memory") (in-memory) or get_client("chdb:///path/to/data.db") (on-disk) returns a client backed by the embedded engine instead of an HTTP server. Ships as chdb.cc_backend plus a clickhouse_connect.backends entry point; install with pip install "chdb[clickhouse-connect]". End-to-end usage requires a clickhouse-connect release that includes the pluggable-backend mechanism (ClickHouse/clickhouse-connect#811).
• chdb.agents contract 0.2.0 (#602) — descriptors as the single source of truth, capabilities(), acall(), hardened descriptor and dispatch edges, external-session probing, allowlist scanner fixes.

Docs

• llms.txt / llms-full.txt — LLM-friendly index for chDB, gated in CI (#598, [#599], [#600]).

CI

• Pin pyarrow<25 in the Linux arm64 DataStore test environment to work around a pyarrow 25.0.0 parquet read corruption on linux-aarch64; the pin will be removed once a fixed pyarrow release is out (#605).