diff --git a/packages/coding-agent/CHANGELOG.md b/packages/coding-agent/CHANGELOG.md
index 90ce4736..d84d211c 100644
--- a/packages/coding-agent/CHANGELOG.md
+++ b/packages/coding-agent/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## [Unreleased]
 
+### Added
+
+- Added `ToolCallEventResult` to the `@mariozechner/pi-coding-agent` top-level and core extension exports so extension authors can type explicit `tool_call` handler return values ([#2458](https://github.com/badlogic/pi-mono/issues/2458))
+
 ### Fixed
 
 - Fixed `ctrl+z` suspend and `fg` resume reliability by keeping the process alive until the `SIGCONT` handler restores the TUI, avoiding immediate process exit in environments with no other live event-loop handles ([#2454](https://github.com/badlogic/pi-mono/issues/2454))
diff --git a/packages/coding-agent/src/core/index.ts b/packages/coding-agent/src/core/index.ts
index db258fea..dd47b8d1 100644
--- a/packages/coding-agent/src/core/index.ts
+++ b/packages/coding-agent/src/core/index.ts
@@ -52,6 +52,7 @@ export {
 	type SessionSwitchEvent,
 	type SessionTreeEvent,
 	type ToolCallEvent,
+	type ToolCallEventResult,
 	type ToolDefinition,
 	type ToolRenderResultOptions,
 	type ToolResultEvent,
diff --git a/packages/coding-agent/src/index.ts b/packages/coding-agent/src/index.ts
index 9a792399..64567d4b 100644
--- a/packages/coding-agent/src/index.ts
+++ b/packages/coding-agent/src/index.ts
@@ -112,6 +112,7 @@ export type {
 	SlashCommandSource,
 	TerminalInputHandler,
 	ToolCallEvent,
+	ToolCallEventResult,
 	ToolDefinition,
 	ToolInfo,
 	ToolRenderResultOptions,