report installed version from update install

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json

@@ -20251,6 +20251,18 @@
       },
       "UpdateInstallResponse": {
         "$schema": "http://json-schema.org/draft-07/schema#",
+        "properties": {
+          "installedVersion": {
+            "type": "string"
+          },
+          "success": {
+            "type": "boolean"
+          }
+        },
+        "required": [
+          "installedVersion",
+          "success"
+        ],
         "title": "UpdateInstallResponse",
         "type": "object"
       },

codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json

@@ -18030,6 +18030,18 @@
     },
     "UpdateInstallResponse": {
       "$schema": "http://json-schema.org/draft-07/schema#",
+      "properties": {
+        "installedVersion": {
+          "type": "string"
+        },
+        "success": {
+          "type": "boolean"
+        }
+      },
+      "required": [
+        "installedVersion",
+        "success"
+      ],
       "title": "UpdateInstallResponse",
       "type": "object"
     },

codex-rs/app-server-protocol/schema/json/v2/UpdateInstallResponse.json

@@ -1,5 +1,17 @@
 {
   "$schema": "http://json-schema.org/draft-07/schema#",
+  "properties": {
+    "installedVersion": {
+      "type": "string"
+    },
+    "success": {
+      "type": "boolean"
+    }
+  },
+  "required": [
+    "installedVersion",
+    "success"
+  ],
   "title": "UpdateInstallResponse",
   "type": "object"
 }

codex-rs/app-server-protocol/schema/typescript/v2/UpdateInstallResponse.ts

@@ -2,4 +2,4 @@
 
 // This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
 
-export type UpdateInstallResponse = Record<string, never>;
+export type UpdateInstallResponse = { installedVersion: string, success: boolean, };

codex-rs/app-server-protocol/src/protocol/v2/update.rs

@@ -28,4 +28,7 @@ pub struct UpdateCheckResponse {
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, JsonSchema, TS)]
 #[serde(rename_all = "camelCase")]
 #[ts(export_to = "v2/")]
-pub struct UpdateInstallResponse {}
+pub struct UpdateInstallResponse {
+    pub installed_version: String,
+    pub success: bool,
+}

codex-rs/app-server/README.md

@@ -202,7 +202,7 @@ Example with notification opt-out:
 - `model/list` — list available models (set `includeHidden: true` to include entries with `hidden: true`), with model-advertised string reasoning effort options in the catalog's intended progression order, `additionalSpeedTiers`, `serviceTiers`, optional `defaultServiceTier`, optional legacy `upgrade` model ids, optional `upgradeInfo` metadata (`model`, `upgradeCopy`, `modelLink`, `migrationMarkdown`), and optional `availabilityNux` metadata. Clients should preserve the `supportedReasoningEfforts` array order rather than deriving order from the effort names.
 - `modelProvider/capabilities/read` — read provider-level capabilities for the currently configured model provider.
 - `update/check` — force a fresh update check and return the current version, latest version available through the detected distribution channel, installation method, and whether app-server can apply the update automatically.
-- `update/install` — run the updater associated with the detected installation method; returns `{}` after the updater exits successfully.
+- `update/install` — run the updater associated with the detected installation method; returns the installed version and whether installation succeeded.
 - `experimentalFeature/list` — list feature flags with stage metadata (`beta`, `underDevelopment`, `stable`, etc.), enabled/default-enabled state, and cursor pagination. Pass `threadId` when showing feature state for an existing loaded thread so `enabled` is computed from that thread's refreshed config, including project-local config for the thread's cwd; if omitted, the server uses its default config resolution context. For non-beta flags, `displayName`/`description`/`announcement` are `null`.
 - `permissionProfile/list` — beta; list available permission profile ids with optional display `description` text and an `allowed` flag reflecting effective requirements, using cursor pagination. Pass `cwd` when the caller needs project-local `[permissions.<id>]` entries to be included in the current catalog view.
 - `experimentalFeature/enablement/set` — patch the in-memory process-wide runtime feature enablement for currently supported feature keys. For each feature, precedence is: cloud requirements > --enable <feature_name> > config.toml > experimentalFeature/enablement/set (new) > code default. Invalid keys will be ignored.
@@ -1920,7 +1920,8 @@ request has no params:
 `installationMethod` is one of `npm`, `bun`, `brew`, `standaloneUnix`,
 `standaloneWindows`, or `other`. npm and Bun checks require the latest GitHub
 release to be ready under npm's `latest` tag. Homebrew checks the cask version;
-standalone and other installations check the latest GitHub release.
+standalone and other installations check the latest GitHub release. The
+`latestVersion` field is the version that an available update would install.
 
 When `canAutoUpdate` is `true`, call `update/install` to run the
 corresponding npm, Bun, Homebrew, or standalone installer. The updater's output
@@ -1930,11 +1931,15 @@ installed version.
 
 ```json
 { "method": "update/install", "id": 51 }
-{ "id": 51, "result": {} }
+{ "id": 51, "result": {
+    "installedVersion": "1.3.0",
+    "success": true
+} }
 ```
 
 For `installationMethod: "other"`, `update/install` returns an invalid-request
-error because app-server cannot determine a safe updater command.
+error because app-server cannot determine a safe updater command. Installer or
+post-install version-check failures return a JSON-RPC error instead of a result.
 
 ## Auth endpoints
 

codex-rs/app-server/src/request_processors/update_processor.rs

@@ -79,7 +79,44 @@ impl UpdateRequestProcessor {
             )));
         }
 
-        Ok(Some(UpdateInstallResponse {}.into()))
+        let version_output = Command::new("codex")
+            .arg("--version")
+            .output()
+            .await
+            .map_err(|err| {
+                internal_error(format!(
+                    "Codex update succeeded, but the installed version could not be read: {err}"
+                ))
+            })?;
+        if !version_output.status.success() {
+            return Err(internal_error(format!(
+                "Codex update succeeded, but `codex --version` failed with status {}",
+                version_output.status
+            )));
+        }
+        let version_stdout = String::from_utf8(version_output.stdout).map_err(|err| {
+            internal_error(format!(
+                "Codex update succeeded, but `codex --version` returned invalid UTF-8: {err}"
+            ))
+        })?;
+        let installed_version = version_stdout
+            .trim()
+            .strip_prefix("codex-cli ")
+            .filter(|version| !version.is_empty())
+            .ok_or_else(|| {
+                internal_error(format!(
+                    "Codex update succeeded, but `codex --version` returned an unexpected value: {version_stdout:?}"
+                ))
+            })?
+            .to_string();
+
+        Ok(Some(
+            UpdateInstallResponse {
+                installed_version,
+                success: true,
+            }
+            .into(),
+        ))
     }
 }
 

codex-rs/app-server/tests/suite/v2/update.rs

@@ -15,20 +15,27 @@ use tokio::time::timeout;
 
 const DEFAULT_TIMEOUT: Duration = Duration::from_secs(10);
 
+fn write_executable(path: &std::path::Path, contents: &str) -> Result<()> {
+    fs::write(path, contents)?;
+    let mut permissions = fs::metadata(path)?.permissions();
+    permissions.set_mode(0o755);
+    fs::set_permissions(path, permissions)?;
+    Ok(())
+}
+
 #[tokio::test]
 async fn update_install_runs_the_detected_npm_updater() -> Result<()> {
     let codex_home = TempDir::new()?;
     let bin_dir = codex_home.path().join("bin");
     fs::create_dir_all(&bin_dir)?;
     let npm_path = bin_dir.join("npm");
+    let codex_path = bin_dir.join("codex");
     let invocation_path = codex_home.path().join("npm-invocation.txt");
-    fs::write(
+    write_executable(
         &npm_path,
         "#!/bin/sh\nprintf '%s\\n' \"$@\" > \"$CODEX_TEST_UPDATE_INVOCATION\"\n",
     )?;
-    let mut permissions = fs::metadata(&npm_path)?.permissions();
-    permissions.set_mode(0o755);
-    fs::set_permissions(&npm_path, permissions)?;
+    write_executable(&codex_path, "#!/bin/sh\nprintf 'codex-cli 1.2.3\\n'\n")?;
 
     let path = format!(
         "{}:{}",
@@ -55,7 +62,13 @@ async fn update_install_runs_the_detected_npm_updater() -> Result<()> {
     .await??;
     let response = to_response::<UpdateInstallResponse>(response)?;
 
-    assert_eq!(response, UpdateInstallResponse {});
+    assert_eq!(
+        response,
+        UpdateInstallResponse {
+            installed_version: "1.2.3".to_string(),
+            success: true,
+        }
+    );
     assert_eq!(
         fs::read_to_string(invocation_path)?,
         "install\n-g\n@openai/codex\n"