IDDQueue 0.13.0rc1

IDDQueue 0.13.0rc1

First release candidate for the independent IDDQueue fork of
DALIBO dramatiq-pg.
This is a prerelease for evaluation, not a published stable release.
The PostgreSQL license and original contributor credits are preserved.

Included

Synchronous Psycopg 3 and Dramatiq 2.2.1+, transactional/batch enqueue,
PostgreSQL coordination, deduplication, queue control/cancellation, failure retry,
attempt history, scheduling, namespace isolation, optional Prometheus metrics,
and a FastAPI example. See the changelog.
Task notifications carry message IDs only; consumers retrieve authoritative SQL rows.

Test installation

From the verified checkout, artifacts are built into dist/0.13.0rc1/:

uv pip install 'dist/0.13.0rc1/iddqueue-0.13.0rc1-py3-none-any.whl[binary]'
iddqueue --version

The expected CLI/metadata version is 0.13.0rc1. Monitoring is optional; use
[binary,monitoring] when needed. FastAPI is an example dependency group, not
part of the package runtime. Published on PyPI and
GitHub.
Install from PyPI with uv pip install "iddqueue[binary]==0.13.0rc1".
The repository is public.

Migration and limits

Follow the migration guide: stop all participants, back up data,
update imports/CLI/metric names, run iddqueue upgrade, then restart participants
with consistent schema/prefix and feature flags. Update every publisher, worker
and scheduler to remove older payload-bearing notifications. Do not run init
over existing storage. Non-default namespaces change channels/lock domains.

Delivery is at least once: tasks and callbacks must be idempotent. Cancellation
of running work is cooperative. Scheduling uses fixed intervals. Async actors
use Dramatiq middleware; publication/results remain synchronous. FastAPI async
endpoints offload publication to a thread; AsyncConnection transactional enqueue
is unsupported. Disconnecting an HTTP client does not cancel a commit.

A downgrade is not a reverse schema migration. Preserve the backup and previous
application configuration; follow the migration guide's rollback limitations.

Candidate evidence

The OpenSpec prepare-rc-release evidence records the candidate SHA, actual CI,
commands, wheel/sdist SHA256 and known limitations. Build hashes identify those
specific artifacts. Release procedure covers repeatable validation.
GitHub prerelease and PyPI publication completed; TestPyPI was not used.

Verified package candidate: 4e808632f920390100658b091bac2ab97a55eb2a. 147 tests, candidate CI 6/6. PyPI OIDC publication succeeded; remote file SHA256 and clean index install verified. Download the wheel/sdist/SHA256SUMS assets from this prerelease.