diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index d0d087a3f..6d9e5fc04 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "1.19.0"
+  ".": "1.20.0"
 }
diff --git a/.stats.yml b/.stats.yml
index e948713b6..5e793c0f5 100644
--- a/.stats.yml
+++ b/.stats.yml
@@ -1,4 +1,4 @@
 configured_endpoints: 115
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/runloop-ai%2Frunloop-5b536a11a713dd4e47b270c130368dbfdf1f30282f262c160cd0411fcd291806.yml
-openapi_spec_hash: f94d993a7f34461ebde7d0186e8e3c3a
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/runloop-ai%2Frunloop-406ebae7a9b8525a70a6400f4119209fc0230f73c93f56b63ee27b43cf7e5085.yml
+openapi_spec_hash: 7ad158db2a73b2a9c31fce2f7f8f935a
 config_hash: 12de9459ff629b6a3072a75b236b7b70
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63921563b..22722ba20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 1.20.0 (2026-04-14)
+
+Full Changelog: [v1.19.0...v1.20.0](https://github.com/runloopai/api-client-ts/compare/v1.19.0...v1.20.0)
+
+### Features
+
+* add OO SDK support for new Agent API calls ([#780](https://github.com/runloopai/api-client-ts/issues/780)) ([cb107b1](https://github.com/runloopai/api-client-ts/commit/cb107b1b5b0a35b2670ae8cfb09092695e6575d7))
+* **axon:** add working directory / directory to launch agent ([#8689](https://github.com/runloopai/api-client-ts/issues/8689)) ([72a0357](https://github.com/runloopai/api-client-ts/commit/72a0357139ffee91b61cc0f176f5a8412a894bcd))
+
 ## 1.19.0 (2026-04-13)
 
 Full Changelog: [v1.18.1...v1.19.0](https://github.com/runloopai/api-client-ts/compare/v1.18.1...v1.19.0)
diff --git a/package.json b/package.json
index fd752eba6..64d043e58 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@runloop/api-client",
-  "version": "1.19.0",
+  "version": "1.20.0",
   "description": "The official TypeScript library for the Runloop API",
   "author": "Runloop <support@runloop.ai>",
   "types": "dist/sdk.d.ts",
diff --git a/packages/mcp-server/manifest.json b/packages/mcp-server/manifest.json
index 4a5bb3ad5..17640c75c 100644
--- a/packages/mcp-server/manifest.json
+++ b/packages/mcp-server/manifest.json
@@ -1,7 +1,7 @@
 {
   "dxt_version": "0.2",
   "name": "@runloop/api-client-mcp",
-  "version": "1.19.0",
+  "version": "1.20.0",
   "description": "The official MCP Server for the Runloop API",
   "author": {
     "name": "Runloop",
diff --git a/packages/mcp-server/package.json b/packages/mcp-server/package.json
index e558ed4cf..0b5aecb29 100644
--- a/packages/mcp-server/package.json
+++ b/packages/mcp-server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@runloop/api-client-mcp",
-  "version": "1.19.0",
+  "version": "1.20.0",
   "description": "The official MCP Server for the Runloop API",
   "author": "Runloop <support@runloop.ai>",
   "types": "dist/index.d.ts",
diff --git a/packages/mcp-server/src/server.ts b/packages/mcp-server/src/server.ts
index 904cbdded..116c029ba 100644
--- a/packages/mcp-server/src/server.ts
+++ b/packages/mcp-server/src/server.ts
@@ -16,7 +16,7 @@ export const newMcpServer = async (stainlessApiKey: string | undefined) =>
   new McpServer(
     {
       name: 'runloop_api_client_api',
-      version: '1.19.0',
+      version: '1.20.0',
     },
     {
       instructions: await getInstructions(stainlessApiKey),
diff --git a/src/resources/shared.ts b/src/resources/shared.ts
index aa96b68bf..d9440ef03 100644
--- a/src/resources/shared.ts
+++ b/src/resources/shared.ts
@@ -178,6 +178,12 @@ export interface BrokerMount {
    * The protocol used by the broker to deliver events to the agent.
    */
   protocol?: 'acp' | 'claude_json' | null;
+
+  /**
+   * Working directory in which to launch the agent binary. Defaults to the home
+   * directory if not specified.
+   */
+  working_directory?: string | null;
 }
 
 /**
diff --git a/src/version.ts b/src/version.ts
index 0158408e4..b28d84d02 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export const VERSION = '1.19.0'; // x-release-please-version
+export const VERSION = '1.20.0'; // x-release-please-version