diff --git a/packages/core/src/installation/version.ts b/packages/core/src/installation/version.ts
index 25d9cd99aa6c..b665f5f25cc6 100644
--- a/packages/core/src/installation/version.ts
+++ b/packages/core/src/installation/version.ts
@@ -3,6 +3,22 @@ declare global {
   const OPENCODE_CHANNEL: string
 }
 
-export const InstallationVersion = typeof OPENCODE_VERSION === "string" ? OPENCODE_VERSION : "local"
-export const InstallationChannel = typeof OPENCODE_CHANNEL === "string" ? OPENCODE_CHANNEL : "local"
+function deriveFromGit() {
+  try {
+    const { execSync } = require("child_process")
+    const branch = execSync("git branch --show-current", { encoding: "utf-8", stdio: ["pipe", "pipe", "pipe"] }).trim()
+    if (!branch) return { channel: "local", version: "local" }
+    const integrationMatch = branch.match(/^integration\/(\d{4}-\d{2}-\d{2}-\d{2}-\d{2})$/)
+    if (integrationMatch) return { channel: branch, version: integrationMatch[1] }
+    const ts = new Date().toISOString().slice(0, 16).replace(/[-:T]/g, "")
+    return { channel: branch, version: `0.0.0-${branch}-${ts}` }
+  } catch {
+    return { channel: "local", version: "local" }
+  }
+}
+
+const fallback = typeof OPENCODE_VERSION === "string" ? null : deriveFromGit()
+
+export const InstallationVersion = typeof OPENCODE_VERSION === "string" ? OPENCODE_VERSION : (fallback?.version ?? "local")
+export const InstallationChannel = typeof OPENCODE_CHANNEL === "string" ? OPENCODE_CHANNEL : (fallback?.channel ?? "local")
 export const InstallationLocal = InstallationChannel === "local"