diff --git a/packages/opencode/src/config/config.ts b/packages/opencode/src/config/config.ts
index ed1b155003d..1e720b5a523 100644
--- a/packages/opencode/src/config/config.ts
+++ b/packages/opencode/src/config/config.ts
@@ -1014,7 +1014,7 @@ export namespace Config {
         })
         .optional(),
       plugin: z.string().array().optional(),
-      snapshot: z.boolean().optional(),
+      snapshot: z.union([z.boolean(), z.number().int().nonnegative()]).optional(),
       share: z
         .enum(["manual", "auto", "disabled"])
         .optional()
diff --git a/packages/opencode/src/snapshot/index.ts b/packages/opencode/src/snapshot/index.ts
index b3c8a905c25..0ea5bd8235f 100644
--- a/packages/opencode/src/snapshot/index.ts
+++ b/packages/opencode/src/snapshot/index.ts
@@ -11,7 +11,6 @@ import { Scheduler } from "../scheduler"
 export namespace Snapshot {
   const log = Log.create({ service: "snapshot" })
   const hour = 60 * 60 * 1000
-  const prune = "7.days"
 
   export function init() {
     Scheduler.register({
@@ -23,34 +22,39 @@ export namespace Snapshot {
   }
 
   export async function cleanup() {
-    if (Instance.project.vcs !== "git") return
     const cfg = await Config.get()
-    if (cfg.snapshot === false) return
-    const git = gitdir()
-    const exists = await fs
-      .stat(git)
-      .then(() => true)
-      .catch(() => false)
-    if (!exists) return
-    const result = await $`git --git-dir ${git} --work-tree ${Instance.worktree} gc --prune=${prune}`
-      .quiet()
-      .cwd(Instance.directory)
-      .nothrow()
-    if (result.exitCode !== 0) {
-      log.warn("cleanup failed", {
-        exitCode: result.exitCode,
-        stderr: result.stderr.toString(),
-        stdout: result.stdout.toString(),
-      })
-      return
+    if (cfg.snapshot === false || cfg.snapshot === 0 || cfg.snapshot === undefined) return
+    const retentionDays: number = cfg.snapshot === true ? 7 : cfg.snapshot!
+    const snapshotDir = gitdir()
+    const parentDir = path.dirname(snapshotDir)
+    try {
+      const entries = await fs.readdir(parentDir, { withFileTypes: true })
+      let deletedCount = 0
+      for (const entry of entries) {
+        if (!entry.isDirectory()) continue
+        const projectDir = path.join(parentDir, entry.name)
+        const stats = await fs.stat(projectDir)
+        const ageMs = Date.now() - stats.mtimeMs
+        const ageDays = ageMs / (24 * 60 * 60 * 1000)
+        if (ageDays > retentionDays) {
+          await fs.rm(projectDir, { recursive: true, force: true })
+          deletedCount++
+          log.info("deleted old snapshot directory", {
+            project: entry.name,
+            ageDays: Math.floor(ageDays),
+          })
+        }
+      }
+      log.info("cleanup", { retentionDays, deletedCount })
+    } catch (error) {
+      log.warn("cleanup failed", { error: (error as Error).message })
     }
-    log.info("cleanup", { prune })
   }
 
   export async function track() {
     if (Instance.project.vcs !== "git") return
     const cfg = await Config.get()
-    if (cfg.snapshot === false) return
+    if (cfg.snapshot === false || cfg.snapshot === 0) return
     const git = gitdir()
     if (await fs.mkdir(git, { recursive: true })) {
       await $`git init`
diff --git a/packages/opencode/test/snapshot/snapshot.test.ts b/packages/opencode/test/snapshot/snapshot.test.ts
index 091469ec761..c090ff1b49a 100644
--- a/packages/opencode/test/snapshot/snapshot.test.ts
+++ b/packages/opencode/test/snapshot/snapshot.test.ts
@@ -2,6 +2,7 @@ import { test, expect } from "bun:test"
 import { $ } from "bun"
 import { Snapshot } from "../../src/snapshot"
 import { Instance } from "../../src/project/instance"
+import { Config } from "../../src/config/config"
 import { tmpdir } from "../fixture/fixture"
 
 async function bootstrap() {
@@ -1038,3 +1039,16 @@ test("diffFull with whitespace changes", async () => {
     },
   })
 })
+
+test("snapshot config with boolean true uses default 7-day retention", async () => {
+  const cfg = { snapshot: true as true | number }
+  const retentionDays = cfg.snapshot === true ? 7 : cfg.snapshot
+  expect(retentionDays).toBe(7)
+})
+
+test("snapshot config with positive integer uses specified retention", async () => {
+  const cfg = { snapshot: 3 as true | number }
+  const retentionDays = cfg.snapshot === true ? 7 : cfg.snapshot
+  expect(retentionDays).toBe(3)
+})
+
diff --git a/packages/sdk/js/src/v2/gen/types.gen.ts b/packages/sdk/js/src/v2/gen/types.gen.ts
index cb1606e3f61..14688851eab 100644
--- a/packages/sdk/js/src/v2/gen/types.gen.ts
+++ b/packages/sdk/js/src/v2/gen/types.gen.ts
@@ -1667,7 +1667,7 @@ export type Config = {
     ignore?: Array<string>
   }
   plugin?: Array<string>
-  snapshot?: boolean
+  snapshot?: boolean | number
   /**
    * Control sharing behavior:'manual' allows manual sharing via commands, 'auto' enables automatic sharing, 'disabled' disables all sharing
    */