chore: release v0.28.0

CHANGELOG.md

@@ -7,6 +7,34 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.28.0](https://github.com/TimelyDataflow/timely-dataflow/compare/timely-v0.27.0...timely-v0.28.0) - 2026-03-25
+
+### Added
+
+- Per-input frontier interest via `FrontierInterest` enum (`Always`, `IfCapability`, `Never`), enabling lazy scheduling where operators only wake on frontier changes when they hold capabilities. Replaces `set_notify(bool)` with `set_notify_for(input, FrontierInterest)`. ([#754](https://github.com/TimelyDataflow/timely-dataflow/pull/754))
+- New `event_driven.rs` example demonstrating lazy scheduling within regions ([#754](https://github.com/TimelyDataflow/timely-dataflow/pull/754))
+- Logging chapter in the mdbook with detailed documentation of `TimelyEvent` variants, operator/channel mapping, scope boundary conventions, and reachability logging ([#766](https://github.com/TimelyDataflow/timely-dataflow/pull/766), [#767](https://github.com/TimelyDataflow/timely-dataflow/pull/767), [#768](https://github.com/TimelyDataflow/timely-dataflow/pull/768))
+- Documentation on execution idioms: stepping, running to completion, and event-driven patterns ([#770](https://github.com/TimelyDataflow/timely-dataflow/pull/770))
+
+### Changed
+
+- **Breaking:** `Operate` is now a builder trait. `get_internal_summary` is renamed to `initialize` and consumes `self`, returning `(Connectivity, SharedProgress, Box<dyn Schedule>)`. Custom operators must be updated. ([#756](https://github.com/TimelyDataflow/timely-dataflow/pull/756))
+- **Breaking:** `MutableAntichain::new_bottom` renamed to `from_elem` ([#758](https://github.com/TimelyDataflow/timely-dataflow/pull/758))
+- **Breaking:** `BytesMut::try_regenerate` now returns `Option<bool>` instead of panicking on type mismatch ([#759](https://github.com/TimelyDataflow/timely-dataflow/pull/759))
+- **Breaking:** `vec::Partition` trait signature simplified; type parameters `D2` and `F` moved from the trait to the method ([#759](https://github.com/TimelyDataflow/timely-dataflow/pull/759))
+- Default progress mode changed from `Eager` to `Demand` for more efficient progress tracking ([#758](https://github.com/TimelyDataflow/timely-dataflow/pull/758))
+- Progress tracking `Tracker` internals converted to columnar representation for better cache locality ([#762](https://github.com/TimelyDataflow/timely-dataflow/pull/762))
+- Updated to columnar 0.12 ([#769](https://github.com/TimelyDataflow/timely-dataflow/pull/769))
+
+### Removed
+
+- **Breaking:** `Operate::set_external_summary` removed; operators are no longer scheduled during dataflow construction. Probe initialization corrected to not require this. ([#592](https://github.com/TimelyDataflow/timely-dataflow/pull/592))
+- **Breaking:** `Input::epoch()` removed; use `Input::time()` instead ([#758](https://github.com/TimelyDataflow/timely-dataflow/pull/758))
+
+### Fixed
+
+- Extensive mdbook documentation fixes: broken links, outdated API signatures, untested examples converted to compile-checked blocks ([#760](https://github.com/TimelyDataflow/timely-dataflow/pull/760))
+
 ## [0.27.0](https://github.com/TimelyDataflow/timely-dataflow/compare/timely-v0.26.1...timely-v0.27.0) - 2026-03-03
 
 ### Other

bytes/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_bytes"
-version = "0.27.0"
+version = "0.28.0"
 authors = ["Frank McSherry <fmcsherry@me.com>"]
 edition.workspace = true
 rust-version.workspace = true

communication/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_communication"
-version = "0.27.0"
+version = "0.28.0"
 authors = ["Frank McSherry <fmcsherry@me.com>"]
 description = "Communication layer for timely dataflow"
 edition.workspace = true
@@ -25,9 +25,9 @@ columnar = { workspace = true }
 getopts = { version = "0.2.24", optional = true }
 byteorder = "1.5"
 serde = { version = "1.0", features = ["derive"] }
-timely_bytes = { path = "../bytes", version = "0.27" }
-timely_container = { path = "../container", version = "0.27.0" }
-timely_logging = { path = "../logging", version = "0.27" }
+timely_bytes = { path = "../bytes", version = "0.28" }
+timely_container = { path = "../container", version = "0.28.0" }
+timely_logging = { path = "../logging", version = "0.28" }
 
 # Lgalloc only supports linux and macos, don't depend on any other OS.
 [target.'cfg(any(target_os = "linux", target_os = "macos"))'.dev-dependencies]

container/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_container"
-version = "0.27.0"
+version = "0.28.0"
 description = "Container abstractions for Timely"
 license = "MIT"
 edition.workspace = true

logging/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_logging"
-version = "0.27.0"
+version = "0.28.0"
 authors = ["Frank McSherry <fmcsherry@me.com>"]
 description = "Common timely logging infrastructure"
 edition.workspace = true
@@ -16,4 +16,4 @@ license = "MIT"
 workspace = true
 
 [dependencies]
-timely_container = { version = "0.27.0", path = "../container" }
+timely_container = { version = "0.28.0", path = "../container" }

timely/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "timely"
-version = "0.27.0"
+version = "0.28.0"
 authors = ["Frank McSherry <fmcsherry@me.com>"]
 readme = "../README.md"
 edition.workspace = true
@@ -30,8 +30,8 @@ bincode = { version = "1.3" }
 byteorder = "1.5"
 itertools = "0.14.0"
 serde = { version = "1.0", features = ["derive"] }
-timely_bytes = { path = "../bytes", version = "0.27" }
-timely_logging = { path = "../logging", version = "0.27" }
-timely_communication = { path = "../communication", version = "0.27", default-features = false }
-timely_container = { path = "../container", version = "0.27" }
+timely_bytes = { path = "../bytes", version = "0.28" }
+timely_logging = { path = "../logging", version = "0.28" }
+timely_communication = { path = "../communication", version = "0.28", default-features = false }
+timely_container = { path = "../container", version = "0.28" }
 smallvec = { version = "1.15.1", features = ["serde", "const_generics"] }