diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 2e769c45..205cca19 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 ## [Unreleased]
 
+### New Features
+
+- TypeBox 1.x migration for extensions and SDK integrations, including TypeBox-native tool argument validation that now works in eval-restricted runtimes such as Cloudflare Workers. See [docs/extensions.md](docs/extensions.md) and [docs/sdk.md](docs/sdk.md).
+- Stacked extension autocomplete providers via `ctx.ui.addAutocompleteProvider(...)`, allowing extensions to layer custom completion logic on top of built-in slash and path completion. See [docs/extensions.md#autocomplete-providers](docs/extensions.md#autocomplete-providers) and [examples/extensions/github-issue-autocomplete.ts](examples/extensions/github-issue-autocomplete.ts).
+- Terminating tool results via `terminate: true`, allowing custom tools to end on a final tool call without paying for an automatic follow-up LLM turn. See [docs/extensions.md](docs/extensions.md) and [examples/extensions/structured-output.ts](examples/extensions/structured-output.ts).
+- OSC 9;4 terminal progress indicators during agent streaming and compaction for supporting terminals.
+
 ### Breaking Changes
 
 - Migrated first-party coding-agent code, SDK/examples/docs, and package metadata from `@sinclair/typebox` 0.34.x to `typebox` 1.x. New extensions, SDK integrations, and pi packages should depend on and import from `typebox`. Legacy extension loading still aliases the root `@sinclair/typebox` package, but `@sinclair/typebox/compiler` is no longer shimmed. This migration also picks up the new `@mariozechner/pi-ai` TypeBox-native validator path, so tool argument validation now works in eval-restricted runtimes such as Cloudflare Workers instead of being skipped ([#3112](https://github.com/badlogic/pi-mono/issues/3112))