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Change Log

All notable changes to this project will be documented in this file. See Conventional Commits for commit guidelines.

v1.0.0 (2026-01-25)

Breaking Changes:

  • Store inputs in their own struct (#269) by James Harton

Features:

  • add tests for guard telemetry events by Jaden

Bug Fixes:

  • remove unused async options from Reactor.undo/3 (#292) by James Harton

  • move mermaid script to before_closing_body_tag for proper rendering (#289) by James Harton

  • implement nested_steps/1 for Step.Switch to fix dependency resolution (#288) by James Harton

  • set proper class for reactor errors (#286) by Zach Daniel

  • Telemetry middleware crashes on unhandled guard events (#276) by Jaden

  • telemetry middleware implements guard steps by Jaden

  • tests failing because of REUSE annotations (#275) by James Harton

v0.17.0 (2025-09-30)

Features:

  • Add backoff support for retries. (#267) by James Harton

Bug Fixes:

  • Add stacktrace to exception (#265) by Rutgerdj

  • Add stacktrace to exception by Rutgerdj

  • remove rescue statement inside AnonFn.run/3 by Rutgerdj

Improvements:

  • Add description option to Reactor DSL and struct. (#268) by James Harton

  • Prepare Minimal Spark Update (#266) by Jonatan Männchen

v0.16.0 (2025-09-21)

Features:

  • Allow Reactors to be able to be undone after successful completion. (#262) by James Harton

  • add allow_async? flag to compose DSL (#256) by James Harton

Bug Fixes:

  • undo for composed reactors (#263) by James Harton

  • resolve nested step dependency and argument inheritance issues (#258) by James Harton

  • correct current_try increment during step retries (#257) by James Harton

  • correct current_try increment during step retries by James Harton

  • mermaid: trim whitespace from module names to prevent :nofile errors (#253) by James Harton

v0.15.6 (2025-07-02)

Bug Fixes:

  • mermaid: use TB instead of TD (#241) by ChristianAlexander

v0.15.5 (2025-06-18)

Bug Fixes:

  • don't use regexes in module attributes, for otp28 compat by Zach Daniel

v0.15.4 (2025-05-30)

Improvements:

  • add support for recursive sub-reactors (#215)

  • add support for recursive sub-reactors

v0.15.3 (2025-05-24)

Improvements:

  • add usage-rules.md (#218)

v0.15.2 (2025-04-15)

Improvements:

  • Include a unique run_id for every reactor run. (#201)

v0.15.1 (2025-04-09)

Improvements:

  • Allow additional telemetry metadata to be provided via Reactor context. (#194)

v0.15.0 (2025-03-11)

Features:

  • Add reactor.run mix task. (#184)

v0.14.0 (2025-03-04)

Features:

  • Add ability to convert Reactors into Mermaid flowcharts.

Improvements:

  • Add the ability to render Mermaid flowcharts. (#175)

  • Ensure that descriptions are carried through into Reactor structs.

v0.13.3 (2025-02-17)

Bug Fixes:

  • pass full step to undo error

v0.13.2 (2025-02-15)

Bug Fixes:

  • context should be shared with child reactors by default. (#168)

v0.13.1 (2025-02-11)

Bug Fixes:

  • Radically simplify reactor composition. (#162)

v0.13.0 (2025-02-11)

Features:

  • template: Add template step which renders an EEx template. (#154)

  • Add where and guard entities to steps. (#148)

Bug Fixes:

  • Correctly pass guards into flunk step. (#158)

  • Runtime step planning with intermediate results. (#156)

Improvements:

  • Verify step name uniqueness recursively. (#153)

v0.12.1 (2025-02-04)

Bug Fixes:

  • Correctly pass guards into flunk step. (#158)

  • Runtime step planning with intermediate results. (#156)

v0.12.0 (2025-02-01)

Features:

  • template: Add template step which renders an EEx template. (#154)

Improvements:

  • Verify step name uniqueness recursively. (#153)

v0.11.0 (2025-01-28)

Features:

  • Add where and guard entities to steps. (#148)

v0.10.3 (2024-12-19)

Improvements:

  • make igniter optional

v0.10.2 (2024-12-01)

Improvements:

  • DSL: Add description options to most DSL entities. (#137)

v0.10.1 (2024-11-06)

Bug Fixes:

  • Switch: Don't duplicate outside steps inside switch matches. (#133)

  • Don't raise error when switch is missing default branch (#129)

v0.10.0 (2024-09-15)

Features:

  • Reactor.Dsl.Flunk: Add a special step type which always fails. (#125)

v0.9.1 (2024-08-12)

Bug Fixes:

  • Reactor.run!/4 should not return an :ok tuple.

v0.9.0 (2024-07-18)

Features:

  • map: Add the ability to map over elements of a collection inside a reactor. (#123)

  • map: Add the ability to map over elements of a collection inside a reactor.

Bug Fixes:

  • automatically pass extra arguments from the map step to nested steps.

  • spurious test failures seemingly caused by Mimic.

Improvements:

  • throw a more helpful error when a step returns an invalid result.

v0.8.5 (2024-07-10)

Improvements:

  • add mix reactor.install (#124)

v0.8.4 (2024-05-25)

Bug Fixes:

  • inability to store composed reactors at compile time.

v0.8.3 (2024-05-24)

Bug Fixes:

  • Missing __identifier__ field in compose DSL struct.

v0.8.2 (2024-05-08)

Bug Fixes:

  • initialisation issue with middlewares.

v0.8.1 (2024-03-20)

Bug Fixes:

  • RunStepError: pass entire step struct instead of just name when raising.

v0.8.0 (2024-03-18)

Breaking Changes:

  • Use Splode for managing errors. (#97)

Bug Fixes:

  • Don't assume UndefinedFunctionError means the module is not a Reactor.

Improvements:

  • Add template guards.

v0.7.0 (2024-02-28)

Features:

  • Add telemetry middleware. (#93)

  • Add a middleware which emits telemetry events about Reactor.

Bug Fixes:

  • incorrect function arity for Group.after_fun DSL.

Improvements:

  • don't incur compile-time dependencies on middleware.

v0.6.0 (2024-02-26)

Breaking Changes:

  • Remove hooks and replace with middleware behaviour. (#90)

  • Remove hooks and replace with middleware behaviour.

Improvements:

  • Middleware: Add get_process_context/0 and set_process_context/1 middleware hooks.

  • Add step event callback to middleware.

v0.5.2 (2024-02-18)

Bug Fixes:

  • callback spec for Reactor.Step.async?/1.

Performance Improvements:

  • Don't iterate the entire graph every time through the loop. (#88)

v0.5.1 (2024-02-14)

Improvements:

  • Move can?/2 and async?/1 into Reactor.Step behaviour. (#87)

v0.5.0 (2024-02-07)

Features:

  • Add lifecycle hooks to Reactor (#83)

Bug Fixes:

  • don't deadlock when lots of async reactors are sharing a concurrency pool. (#36)

  • weird issue with aliases sometimes not being expanded in generated reactors. (#58)

Improvements:

  • Add ability for steps to decide at runtime whether they should be run asyncronously. (#84)

v0.4.1 (2023-09-26)

Bug Fixes:

  • weird issue with aliases sometimes not being expanded in generated reactors.

v0.4.0 (2023-09-11)

Features:

  • Add collect step entity. (#53)

v0.3.5 (2023-09-06)

Improvements:

  • Template: Abstract template type so that it can be used by extensions.

v0.3.4 (2023-09-04)

Bug Fixes:

  • Allow reactor DSL section to be patched.

  • Reactor: fix call to use Spark.Dsl.

v0.3.3 (2023-09-01)

Improvements:

  • Dsl: Extract DSL entities into their target modules. (#50)

v0.3.2 (2023-07-27)

Bug Fixes:

  • Don't swallow errors when a step runs out of retries. (#41)

v0.3.1 (2023-07-24)

Improvements:

  • Add wait_for DSL. (#39)

  • Add "subpaths" to templates. (#31)

  • Step.Debug: Add debug step and DSL. (#30)

  • Step.Switch: Add switch DSL and step type. (#29)

v0.3.0 (2023-07-03)

Features:

  • Step.Around: Add ability to wrap a function around a group of steps. (#24)

Bug Fixes:

  • Executor: don't double-iterate the graph each time through the loop.

Improvements:

  • Add group DSL entity and Reactor.Step.Group. (#27)

  • Reactor.Executor: track concurrent process usage across multiple reactors. (#26)

  • Support timeout and async? Reactor options. (#20)

  • Invert DSL entity building. (#19)

  • Allow entire step behaviour to be defined in the DSL. (#18)

Performance Improvements:

  • Dsl: Build and pre-plan DSL reactors.

  • Builder: build transformation steps as synchronous.

v0.2.4 (2023-06-15)

Improvements:

  • Add ability to compose reactors.

  • Builder: rename internally generated steps to start with :__reactor__. (#10)

v0.2.3 (2023-06-07)

Improvements:

  • Add step-wide argument transforms. (#9)

  • Add step-wide argument transforms.

v0.2.2 (2023-05-15)

Bug Fixes:

  • Reactor.Argument: Remove spurious is_atom constraint on Argument.from_input/2..3.

v0.2.1 (2023-05-12)

Improvements:

  • Reactor.Step: remove can?/1 and replace with optional callbacks. (#6)

v0.2.0 (2023-05-10)

Features:

  • implement basic reactor behaviour. (#1)

v0.1.0 (2023-04-19)