This page records the inter-package history of the LSST DM stack packages, including package renames, retirements, additions, and code transfers.  Intra-package changes are maintained in the git logs.

Note that official recordkeeping began April 2015; records prior to that date are incomplete.

Date(s)	Issue(s)	Origin Package	Destination Package	Operation	Notes
2015/08		datarel	daf_ingest	Code Transfer	The source ingestion task was moved to daf_ingest as part of a generalization and rename.
2014/10/16		meas_multifit	meas_modelfit	Package Rename	Name changed to better reflect package contents.
2013/11 - 2015/03		meas_algorithms	meas_base	Code Transfer	As part of the measurement framework rewrite, the standard suite of measurement algorithms was moved from meas_algorithms to meas_base.
2016/10/10		daf_butlerUtils	obs_base	Package Rename	Name changed to better reflect package purpose.
2019/04/30		ap_verify	verify	Code Transfer	TimingMetricTask moved to lsst.verify, a more appropriate location for generic code.
2019/11/20		dax_ppdb	dax_apdb	Package Rename
2020/07/01		cat	sdm_schemas	Package Rename
2021/02/22		lsst-dmsst/metric-pipeline-tasks	verify	Code Transfer	make_job_document.py moved to lsst.verify and renamed to gen3_to_job.py
2021/06/08		ap_association	meas_base	Code Transfer	Needed to move DiaCalculation plugins and task into meas base to avoid a circular input from pipe_tasks. Makes sense for these measurement/catalog calculations plugins/tasks to live there.
2021/06/17		ap_pipe	pipe_tasks	Code transfer	MatchApFakesTask moved to pipe_tasks and renamed to MatchFakesTask.
2023/11/14		prompt_prototype	prompt_processing	Package rename	Rename done in-place instead of strictly following DMTN-027.