chore: release v0.25.0 (#720)

* chore: release v0.25.0

* Refactor timely operator architecture and session handling

The timely operator architecture has been refactored to improve session management and container handling. New input handles with a `for_each_time` method have been introduced to facilitate grouping by time.

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Frank McSherry <[email protected]>

Author: github-actions[bot]

CHANGELOG.md

@@ -7,6 +7,33 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.25.0](https://github.com/TimelyDataflow/timely-dataflow/compare/timely-v0.24.0...timely-v0.25.0) - 2025-10-23
+
+The timely operator architecture has changed a bit, for the better but with footguns for migration.
+Timely operators used to fuse sessions opened with the same capabilities, allowing one to treat session creation as low cost.
+This behavior has been stopped, and the data sent into one session will be formed into one container.
+Sessions will supply and use their own container builder, and the recommended fix is to consolidate output you want to send by session.
+
+The change comes because the embedded container builder is at odds with folks who want to bring their own containers.
+The refactoring de-embeds the container builder, surfacing it to "user code" but at the expense of being unable to chain across sessions.
+
+To make it easier to bundle work by sessions, input handles provide a new `for_each_time` method that provide input collections grouped by time.
+This allows many operators to draw down these groups by time, perform the work and create one session to transmit the results.
+This should be strictly better than not doing it, and relying on timely to fuse sessions, as it ensures all work that can be fused is fused.
+
+### Other
+
+- Remove constraints from container builders ([#712](https://github.com/TimelyDataflow/timely-dataflow/pull/712))
+- Update various dependencies ([#719](https://github.com/TimelyDataflow/timely-dataflow/pull/719))
+- Provide access for wrapped builder ([#717](https://github.com/TimelyDataflow/timely-dataflow/pull/717))
+- Pivot container builders above capability checking ([#715](https://github.com/TimelyDataflow/timely-dataflow/pull/715))
+- Add and use `InputSession` ([#716](https://github.com/TimelyDataflow/timely-dataflow/pull/716))
+- Remove Container argument from Counter ([#714](https://github.com/TimelyDataflow/timely-dataflow/pull/714))
+- Remove Hash from Timestamp ([#713](https://github.com/TimelyDataflow/timely-dataflow/pull/713))
+- Remove IterContainer ([#707](https://github.com/TimelyDataflow/timely-dataflow/pull/707))
+- Replace ExchangeCore with DistributePact ([#711](https://github.com/TimelyDataflow/timely-dataflow/pull/711))
+- Create pact for Distributors ([#709](https://github.com/TimelyDataflow/timely-dataflow/pull/709))
+
 ## [0.24.0](https://github.com/TimelyDataflow/timely-dataflow/compare/timely-v0.23.0...timely-v0.24.0) - 2025-08-28
 
 This version of Timely has some exciting new features.

bytes/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_bytes"
-version = "0.24.0"
+version = "0.25.0"
 authors = ["Frank McSherry <[email protected]>"]
 edition = "2018"
 

communication/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_communication"
-version = "0.24.0"
+version = "0.25.0"
 authors = ["Frank McSherry <[email protected]>"]
 description = "Communication layer for timely dataflow"
 edition.workspace = true
@@ -24,9 +24,9 @@ columnar = { workspace = true }
 getopts = { version = "0.2.24", optional = true }
 byteorder = "1.5"
 serde = { version = "1.0", features = ["derive"] }
-timely_bytes = { path = "../bytes", version = "0.24" }
-timely_container = { path = "../container", version = "0.24.0" }
-timely_logging = { path = "../logging", version = "0.24" }
+timely_bytes = { path = "../bytes", version = "0.25" }
+timely_container = { path = "../container", version = "0.25.0" }
+timely_logging = { path = "../logging", version = "0.25" }
 
 # 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 = "0.24.0"
+version = "0.25.0"
 description = "Container abstractions for Timely"
 license = "MIT"
 edition.workspace = true

logging/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "timely_logging"
-version = "0.24.0"
+version = "0.25.0"
 authors = ["Frank McSherry <[email protected]>"]
 description = "Common timely logging infrastructure"
 edition.workspace = true
@@ -15,4 +15,4 @@ license = "MIT"
 workspace = true
 
 [dependencies]
-timely_container = { version = "0.24.0", path = "../container" }
+timely_container = { version = "0.25.0", path = "../container" }

timely/Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "timely"
-version = "0.24.0"
+version = "0.25.0"
 authors = ["Frank McSherry <[email protected]>"]
 readme = "../README.md"
 edition.workspace = true
@@ -29,10 +29,10 @@ bincode = { version = "1.3" }
 byteorder = "1.5"
 itertools = "0.14.0"
 serde = { version = "1.0", features = ["derive"] }
-timely_bytes = { path = "../bytes", version = "0.24" }
-timely_logging = { path = "../logging", version = "0.24" }
-timely_communication = { path = "../communication", version = "0.24", default-features = false }
-timely_container = { path = "../container", version = "0.24" }
+timely_bytes = { path = "../bytes", version = "0.25" }
+timely_logging = { path = "../logging", version = "0.25" }
+timely_communication = { path = "../communication", version = "0.25", default-features = false }
+timely_container = { path = "../container", version = "0.25" }
 smallvec = { version = "1.15.1", features = ["serde", "const_generics"] }
 
 [dev-dependencies]