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# Release notes
These are the releases of Progmasoft Catch3. Its compatibility engine is
based on Catch2 3.16.1; Catch2's own history is in
[its release notes](https://github.com/catchorg/Catch2/blob/devel/docs/release-notes.md).
**Contents**<br>
[0.3.0 (unreleased)](#030-unreleased)<br>
[0.2.0](#020)<br>
[0.1.0](#010)<br>
## 0.3.0 (unreleased)
### The Catch3 runner
Catch3 keeps Catch2's API for writing tests and replaces its session, command
line and reporters with [a runner of its own](progmasoft-runner.md#top):
* Tests run in parallel worker processes; a crash, an exit or a hang ends one
test, not the run.
* Failures are retried alone to tell deterministic, flaky and order-dependent
failures apart; the test that leaves state behind is found by bisection.
* A history of verdicts and durations drives quarantine, learned time limits,
predictive ordering, incremental runs, replay and analytics.
* Tests are selected by change, by past failure or by prediction, and sharded
by a stable hash or by recorded duration.
* Tags declare serial and isolated tests, shared resources, dependencies,
time limits and retries.
* Every failure gets a category, a signature, an analysis and a replay command.
* Reports are console, JUnit XML, JSON and a Chrome trace; `--list=json` is a
versioned discovery format.
* Every test gets a temporary directory of its own.
### Breaking changes
* Catch2's command line, reporters, `CATCH_REGISTER_REPORTER` and listing
were removed; see [the command line](command-line.md#top) and
[reports](reporters.md#top). Listeners keep working.
* The Catch2 library is compiled as C++20; code that includes only its
headers still needs C++14.
* The results model in `Progmasoft/Catch3/Results.hpp` was rewritten around
tests and attempts.
* Conan packaging was dropped.
### Fixes
* The property engine's example database can be written by several
processes at once.
## 0.2.0
Released 2026-09-24.
* Snapshot comparison and update APIs.
* Framework-neutral test result summaries and deterministic JUnit XML.
* The Progmasoft additions are a static library in every supported build
system.
## 0.1.0
Released 2026-09-24.
* The first release: a deterministic property-testing API next to the
Catch2-compatible engine.
* Bazel module metadata, and CMake, Meson, Xmake and Premake builds.
---
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