diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,74 @@
 
 ---
 
+## [0.17.0] - 2026-07-01
+
+Major themes: first-class support for effects and I/O in the kernel, TypeScript and
+Scala reaching publishable parity with the other hosts, and continued maturation of
+the published-host build model.
+
+### Highlights
+
+- **Effects and I/O** ([#286](https://github.com/CategoricalData/hydra/issues/286),
+  [#288](https://github.com/CategoricalData/hydra/issues/288),
+  [#494](https://github.com/CategoricalData/hydra/issues/494)): a new `effect` variant
+  on `hydra.core.Type` for representing effectful computations; new kernel modules
+  `hydra.file` (`FilePath`, `FileType`, `FileStatus`, `FileExtension`), `hydra.time`
+  (`Timespec`), and `hydra.error.file`; new primitive libraries `hydra.lib.effects`,
+  `hydra.lib.files`, and `hydra.lib.text` with byte-level I/O; and a new
+  `EffectfulTestCase` mechanism so the common test suite can exercise effectful
+  primitives across hosts.
+- **TypeScript is a complete implementation**
+  ([#462](https://github.com/CategoricalData/hydra/issues/462)): self-hosts and passes
+  the common test suite, with a per-package npm publish pipeline
+  ([#492](https://github.com/CategoricalData/hydra/issues/492)).
+- **Scala publishing**: per-package Maven Central publish infrastructure
+  ([#491](https://github.com/CategoricalData/hydra/issues/491)).
+- **Published-host build model**: published mode now compiles the kernel from the
+  co-generated `dist/haskell` rather than Hackage, removing the need for a
+  `haskell=local` shim ([#500](https://github.com/CategoricalData/hydra/issues/500));
+  the oil-and-water principle and cold-build workflow for `dist/haskell` are documented
+  ([#376](https://github.com/CategoricalData/hydra/issues/376)).
+- **Kernel hygiene**: `uniqueLabel` (apostrophe suffixes) replaced by `chooseUniqueLabel`
+  (numeric suffixes) in `hydra.names`
+  ([#436](https://github.com/CategoricalData/hydra/issues/436)).
+
+### Implementations
+
+Eight hosts self-host and pass the common test suite across five families: Haskell,
+Java, Python, Scala, and the four Lisp dialects (Clojure, Common Lisp, Scheme, Emacs
+Lisp), with TypeScript now joining as a complete host/target. Go remains a "head bud"
+(the coder still has emission bugs and the head's runtime is largely placeholder; it
+does not yet host the test suite).
+
+### New Features
+
+- Translingual cross-reference convention for `doc` strings: doc-escape tags render to
+  each host's native doc syntax (Javadoc, Haddock, Sphinx, TSDoc)
+  ([#433](https://github.com/CategoricalData/hydra/issues/433)).
+- Neo4j JSON-artifact validation demo, exercised across Java, Python, Haskell, and
+  TypeScript ([#510](https://github.com/CategoricalData/hydra/issues/510)).
+
+### Improvements
+
+- The Java/Maven publish set now covers every official Hydra target language, one coder
+  package per implementation family
+  ([#468](https://github.com/CategoricalData/hydra/issues/468)).
+- JVM Maven artifact groups are bifurcated to `net.fortytwo.hydra.java` and
+  `net.fortytwo.hydra.scala`, so the Java and Scala (and future Clojure) publish sets
+  never collide on coordinates
+  ([#519](https://github.com/CategoricalData/hydra/issues/519)).
+- Host-specific third-party integrations (the former `bindings/` tree) are folded into
+  `overlay/`, unifying hand-written host-native source under one tree
+  ([#511](https://github.com/CategoricalData/hydra/issues/511)).
+- The coder de-parameterizes context and error types, simplifying generated coder
+  signatures ([#518](https://github.com/CategoricalData/hydra/issues/518)).
+- TypeScript-to-Java generation now emits the `hydra.lib.*` aggregate namespace
+  interfaces (`Maps`, `Strings`, etc.)
+  ([#499](https://github.com/CategoricalData/hydra/issues/499)).
+
+---
+
 ## [0.16.1] - 2026-06-16
 
 Major themes: the first release built by bootstrapping from previously published
diff --git a/hydra.cabal b/hydra.cabal
--- a/hydra.cabal
+++ b/hydra.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           hydra
-version:        0.16.1
+version:        0.17.0
 synopsis:       Hydra: graphs are programs, and programs are graphs (umbrella package)
 description:    Hydra is an implementation of the LambdaGraph data model, which takes advantage of an isomorphism between labeled hypergraphs and typed lambda calculus: in Hydra, "graphs are programs, and programs are graphs". This umbrella package provides a single convenient entry point (the Hydra module) re-exporting the Hydra kernel plus the Haskell coder's moduleToHaskell. Depend on hydra-kernel / hydra-haskell directly for finer-grained APIs.
 category:       Data
@@ -34,6 +34,6 @@
       src/main/haskell
   build-depends:
       base >=4.19.0 && <4.22
-    , hydra-haskell ==0.16.1
-    , hydra-kernel ==0.16.1
+    , hydra-haskell ==0.17.0
+    , hydra-kernel ==0.17.0
   default-language: Haskell2010