Cocoindex v1.0.0 — Component-based Pipelines

Cocoindex authors data pipelines as Python components mounted into an Environment and orchestrated by an App. State is reconciled into target connectors via a TargetState / TargetHandler declarative API. Functions are decorated with @coco.fn (memoized, batchable, optionally GPU-runner-isolated). Lifespan-scoped resources (DB pools, embedders) are provided via @coco.lifespan and retrieved with coco.use_context(KEY). Persistent state lives in a local LMDB store at Settings.db_path.

v0.3.37 → v1.0.0 paradigm shift: the old API (FlowBuilder, DataScope, DataSlice, flow_def, open_flow, transform_flow, cocoindex.sources.*, cocoindex.targets.*, cocoindex.functions.*, LlmSpec, LlmApiType, VectorSimilarityMetric, DatabaseConnectionSpec, Postgres-backed state) is entirely removed. There is no flow.py, no op.py, no index.py, no llm.py, no lib.py, no auth_registry.py. Migration is a full rewrite, not a rename pass — see the migration section for the new vocabulary.

Quick Start

# pip install cocoindex
import asyncio, pathlib
from typing import AsyncIterator, Annotated
from dataclasses import dataclass