diff --git a/packages/opencode/src/config/config.ts b/packages/opencode/src/config/config.ts
index 27ba4e18671..4a2af78ebc8 100644
--- a/packages/opencode/src/config/config.ts
+++ b/packages/opencode/src/config/config.ts
@@ -1052,7 +1052,7 @@ 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 72252b7b4c5..5f43aa198c1 100644
--- a/packages/opencode/src/snapshot/index.ts
+++ b/packages/opencode/src/snapshot/index.ts
@@ -13,7 +13,7 @@ import { Process } from "@/util/process"
 export namespace Snapshot {
   const log = Log.create({ service: "snapshot" })
   const hour = 60 * 60 * 1000
-  const prune = "7.days"
+  const defaultRetentionDays = 7
 
   function args(git: string, cmd: string[]) {
     return ["--git-dir", git, "--work-tree", Instance.worktree, ...cmd]
@@ -31,14 +31,15 @@ export namespace Snapshot {
   export async function cleanup() {
     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 retentionDays = cfg.snapshot === true ? defaultRetentionDays : cfg.snapshot
     const git = gitdir()
     const exists = await fs
       .stat(git)
       .then(() => true)
       .catch(() => false)
     if (!exists) return
-    const result = await Process.run(["git", ...args(git, ["gc", `--prune=${prune}`])], {
+    const result = await Process.run(["git", ...args(git, ["gc", `--prune=${retentionDays}.days`])], {
       cwd: Instance.directory,
       nothrow: true,
     })
@@ -50,13 +51,13 @@ export namespace Snapshot {
       })
       return
     }
-    log.info("cleanup", { prune })
+    log.info("cleanup", { retentionDays })
   }
 
   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 Process.run(["git", "init"], {
diff --git a/packages/opencode/test/snapshot/snapshot.test.ts b/packages/opencode/test/snapshot/snapshot.test.ts
index 1804ab5c2a2..ece872fb372 100644
--- a/packages/opencode/test/snapshot/snapshot.test.ts
+++ b/packages/opencode/test/snapshot/snapshot.test.ts
@@ -1178,3 +1178,16 @@ 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 2629015eb34..ba0a2557500 100644
--- a/packages/sdk/js/src/v2/gen/types.gen.ts
+++ b/packages/sdk/js/src/v2/gen/types.gen.ts
@@ -1343,7 +1343,7 @@ 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
    */