feat(oauth): complete Windsurf / Devin CLI OAuth + API-token flows (#2168)

Integrated into release/v3.8.0 — complete Windsurf/Devin CLI OAuth + API-token executor flows with unit tests.

src/shared/services/cliRuntime.ts

@@ -67,6 +67,24 @@ const CLI_TOOLS: Record<string, any> = {
     healthcheckTimeoutMs: 4000,
     paths: {},
   },
+  devin: {
+    defaultCommand: "devin",
+    envBinKey: "CLI_DEVIN_BIN",
+    requiresBinary: true,
+    // devin acp cold-start can take a few seconds on first run
+    healthcheckTimeoutMs: 12000,
+    paths: {
+      // %APPDATA%\devin\config.json  (Windows)
+      // ~/.config/devin/config.json  (Linux/macOS)
+      config: isWindows()
+        ? path.join(
+            process.env.APPDATA || path.join(os.homedir(), "AppData", "Roaming"),
+            "devin",
+            "config.json"
+          )
+        : path.join(os.homedir(), ".config", "devin", "config.json"),
+    },
+  },
   cline: {
     defaultCommand: "cline",
     envBinKey: "CLI_CLINE_BIN",
@@ -439,6 +457,10 @@ const getKnownToolPaths = (toolId: string): string[] => {
       ["qodercli.cmd", "qodercli"],
       ["qodercli.exe", "qodercli"],
     ],
+    devin: [
+      ["devin.exe", "devin"],
+      ["devin.cmd", "devin"],
+    ],
   };
 
   const bins = toolBins[toolId] || [];
@@ -464,6 +486,11 @@ const getKnownToolPaths = (toolId: string): string[] => {
       paths.push(path.join(home, "bin", "droid.exe"));
     }
 
+    // Devin CLI installs to %LOCALAPPDATA%\devin\cli\bin\devin.exe
+    if (toolId === "devin" && localAppData) {
+      paths.push(path.join(localAppData, "devin", "cli", "bin", "devin.exe"));
+    }
+
     for (const [winName] of bins) {
       if (npmPrefix) paths.push(path.join(npmPrefix, winName));
       if (appData) {
@@ -501,6 +528,12 @@ const getKnownToolPaths = (toolId: string): string[] => {
       if (toolId === "claude") {
         paths.push(path.join(home, ".claude", "bin", posixName));
       }
+      // Devin CLI installs to ~/.local/share/devin/bin/devin (Linux)
+      // or via shell installer to ~/.devin/bin/devin
+      if (toolId === "devin") {
+        paths.push(path.join(home, ".local", "share", "devin", "bin", "devin"));
+        paths.push(path.join(home, ".devin", "bin", "devin"));
+      }
     }
   }