diff --git a/src/resources/extensions/gsd/commands-prefs-wizard.ts b/src/resources/extensions/gsd/commands-prefs-wizard.ts
index 98d12be78..5ca8faf79 100644
--- a/src/resources/extensions/gsd/commands-prefs-wizard.ts
+++ b/src/resources/extensions/gsd/commands-prefs-wizard.ts
@@ -184,11 +184,23 @@ export function buildCategorySummaries(prefs: Record<string, unknown>): Record<s
 
   // Git
   const git = prefs.git as Record<string, unknown> | undefined;
+  const staleThreshold = prefs.stale_commit_threshold_minutes;
+  const absorbSnapshots = git?.absorb_snapshot_commits;
   let gitSummary = "(defaults)";
-  if (git && Object.keys(git).length > 0) {
-    const branch = git.main_branch ?? "main";
-    const push = git.auto_push ? "on" : "off";
-    gitSummary = `main: ${branch}, push: ${push}`;
+  {
+    const parts: string[] = [];
+    if (git && Object.keys(git).length > 0) {
+      const branch = git.main_branch ?? "main";
+      const push = git.auto_push ? "on" : "off";
+      parts.push(`main: ${branch}, push: ${push}`);
+    }
+    if (staleThreshold !== undefined) {
+      parts.push(`stale: ${staleThreshold === 0 ? "off" : `${staleThreshold}m`}`);
+    }
+    if (absorbSnapshots !== undefined) {
+      parts.push(`absorb: ${absorbSnapshots ? "on" : "off"}`);
+    }
+    if (parts.length > 0) gitSummary = parts.join(", ");
   }
 
   // Skills
@@ -469,9 +481,39 @@ async function configureGit(ctx: ExtensionCommandContext, prefs: Record<string,
     git.isolation = isolationChoice;
   }
 
+  // absorb_snapshot_commits (git sub-key)
+  const currentAbsorb = git.absorb_snapshot_commits;
+  const absorbStr = currentAbsorb !== undefined ? String(currentAbsorb) : "";
+  const absorbChoice = await ctx.ui.select(
+    `Absorb snapshot commits into real commits${absorbStr ? ` (current: ${absorbStr})` : " (default: true)"}:`,
+    ["true", "false", "(keep current)"],
+  );
+  if (absorbChoice && absorbChoice !== "(keep current)") {
+    git.absorb_snapshot_commits = absorbChoice === "true";
+  }
+
   if (Object.keys(git).length > 0) {
     prefs.git = git;
   }
+
+  // stale_commit_threshold_minutes (top-level pref, shown in Git section)
+  const currentThreshold = prefs.stale_commit_threshold_minutes;
+  const thresholdStr = currentThreshold !== undefined ? String(currentThreshold) : "";
+  const thresholdInput = await ctx.ui.input(
+    `Stale commit threshold (minutes, 0 to disable)${thresholdStr ? ` (current: ${thresholdStr})` : " (default: 30)"}:`,
+    thresholdStr || "30",
+  );
+  if (thresholdInput !== null && thresholdInput !== undefined) {
+    const val = thresholdInput.trim();
+    const parsed = tryParseInteger(val);
+    if (val && parsed !== null && parsed >= 0) {
+      prefs.stale_commit_threshold_minutes = parsed;
+    } else if (val && parsed === null) {
+      ctx.ui.notify(`Invalid value "${val}" — must be a whole number. Keeping previous value.`, "warning");
+    } else if (!val && currentThreshold !== undefined) {
+      delete prefs.stale_commit_threshold_minutes;
+    }
+  }
 }
 
 async function configureSkills(ctx: ExtensionCommandContext, prefs: Record<string, unknown>): Promise<void> {
diff --git a/src/resources/extensions/gsd/doctor-git-checks.ts b/src/resources/extensions/gsd/doctor-git-checks.ts
index 78754fc8f..2ceffe97e 100644
--- a/src/resources/extensions/gsd/doctor-git-checks.ts
+++ b/src/resources/extensions/gsd/doctor-git-checks.ts
@@ -10,7 +10,7 @@ import { deriveState, isMilestoneComplete } from "./state.js";
 import { listWorktrees, resolveGitDir, worktreesDir } from "./worktree-manager.js";
 import { abortAndReset } from "./git-self-heal.js";
 import { RUNTIME_EXCLUSION_PATHS, resolveMilestoneIntegrationBranch, writeIntegrationBranch } from "./git-service.js";
-import { nativeIsRepo, nativeWorktreeList, nativeWorktreeRemove, nativeBranchList, nativeBranchDelete, nativeLsFiles, nativeRmCached } from "./native-git-bridge.js";
+import { nativeIsRepo, nativeWorktreeList, nativeWorktreeRemove, nativeBranchList, nativeBranchDelete, nativeLsFiles, nativeRmCached, nativeHasChanges, nativeLastCommitEpoch, nativeGetCurrentBranch, nativeAddTracked, nativeCommit } from "./native-git-bridge.js";
 import { getAllWorktreeHealth } from "./worktree-health.js";
 import { loadEffectiveGSDPreferences } from "./preferences.js";
 
@@ -363,6 +363,54 @@ export async function checkGitHealth(
     // Non-fatal — orphaned worktree directory check failed
   }
 
+  // ── Stale uncommitted changes ────────────────────────────────────────────
+  // If the working tree has uncommitted changes and the last commit was
+  // longer ago than the configured threshold, flag it and optionally
+  // auto-commit a safety snapshot so work isn't lost.
+  try {
+    const prefs = loadEffectiveGSDPreferences()?.preferences ?? {};
+    const thresholdMinutes = prefs.stale_commit_threshold_minutes ?? 30;
+
+    if (thresholdMinutes > 0) {
+      const dirty = nativeHasChanges(basePath);
+      if (dirty) {
+        const branch = nativeGetCurrentBranch(basePath);
+        const lastEpoch = nativeLastCommitEpoch(basePath, branch || "HEAD");
+        const nowEpoch = Math.floor(Date.now() / 1000);
+        const minutesSinceCommit = lastEpoch > 0 ? (nowEpoch - lastEpoch) / 60 : Infinity;
+
+        if (minutesSinceCommit >= thresholdMinutes) {
+          const mins = Math.floor(minutesSinceCommit);
+          issues.push({
+            severity: "warning",
+            code: "stale_uncommitted_changes",
+            scope: "project",
+            unitId: "project",
+            message: `Uncommitted changes detected with no commit in ${mins} minute${mins === 1 ? "" : "s"} (threshold: ${thresholdMinutes}m). Snapshotting tracked files.`,
+            fixable: true,
+          });
+
+          if (shouldFix("stale_uncommitted_changes")) {
+            try {
+              nativeAddTracked(basePath);
+              const commitMsg = `gsd snapshot: uncommitted changes after ${mins}m inactivity`;
+              const result = nativeCommit(basePath, commitMsg);
+              if (result) {
+                fixesApplied.push(`created gsd snapshot after ${mins}m of uncommitted changes`);
+              } else {
+                fixesApplied.push("gsd snapshot skipped — nothing to commit after staging tracked files");
+              }
+            } catch {
+              fixesApplied.push("failed to create gsd snapshot commit");
+            }
+          }
+        }
+      }
+    }
+  } catch {
+    // Non-fatal — stale commit check failed
+  }
+
   // ── Worktree lifecycle checks ──────────────────────────────────────────
   // Check GSD-managed worktrees for: merged branches, stale work, dirty
   // state, and unpushed commits. Only worktrees under .gsd/worktrees/.
diff --git a/src/resources/extensions/gsd/doctor-proactive.ts b/src/resources/extensions/gsd/doctor-proactive.ts
index 0eb3b016f..eb7c11a7f 100644
--- a/src/resources/extensions/gsd/doctor-proactive.ts
+++ b/src/resources/extensions/gsd/doctor-proactive.ts
@@ -22,7 +22,7 @@ import { abortAndReset } from "./git-self-heal.js";
 import { rebuildState } from "./doctor.js";
 import { deriveState } from "./state.js";
 import { resolveMilestoneIntegrationBranch } from "./git-service.js";
-import { nativeIsRepo } from "./native-git-bridge.js";
+import { nativeIsRepo, nativeHasChanges, nativeLastCommitEpoch, nativeGetCurrentBranch, nativeAddTracked, nativeCommit } from "./native-git-bridge.js";
 import { loadEffectiveGSDPreferences } from "./preferences.js";
 import { runEnvironmentChecks } from "./doctor-environment.js";
 
@@ -295,6 +295,40 @@ export async function preDispatchHealthGate(basePath: string): Promise<PreDispat
     // Non-fatal — dispatch continues if state/branch check fails
   }
 
+  // ── Stale uncommitted changes — auto-snapshot before dispatch ──
+  // If the working tree is dirty and no commit has happened recently,
+  // create a safety snapshot so work isn't lost if the next unit crashes.
+  try {
+    if (nativeIsRepo(basePath)) {
+      const prefs = loadEffectiveGSDPreferences()?.preferences ?? {};
+      const thresholdMinutes = prefs.stale_commit_threshold_minutes ?? 30;
+
+      if (thresholdMinutes > 0 && nativeHasChanges(basePath)) {
+        const branch = nativeGetCurrentBranch(basePath);
+        const lastEpoch = nativeLastCommitEpoch(basePath, branch || "HEAD");
+        const nowEpoch = Math.floor(Date.now() / 1000);
+        const minutesSinceCommit = lastEpoch > 0 ? (nowEpoch - lastEpoch) / 60 : Infinity;
+
+        if (minutesSinceCommit >= thresholdMinutes) {
+          const mins = Math.floor(minutesSinceCommit);
+          try {
+            nativeAddTracked(basePath);
+            const commitMsg = `gsd snapshot: pre-dispatch, uncommitted changes after ${mins}m inactivity`;
+            const result = nativeCommit(basePath, commitMsg);
+            if (result) {
+              fixesApplied.push(`pre-dispatch: created gsd snapshot after ${mins}m of uncommitted changes`);
+            }
+          } catch {
+            // Non-blocking — snapshot failed but dispatch can continue
+            fixesApplied.push("pre-dispatch: gsd snapshot failed");
+          }
+        }
+      }
+    }
+  } catch {
+    // Non-fatal
+  }
+
   // ── Disk space check ──
   // Catches low-disk conditions before dispatch rather than letting the unit
   // fail mid-execution with ENOSPC (which wastes a full LLM turn).
diff --git a/src/resources/extensions/gsd/doctor-types.ts b/src/resources/extensions/gsd/doctor-types.ts
index 864e8f8fa..8c804b3b8 100644
--- a/src/resources/extensions/gsd/doctor-types.ts
+++ b/src/resources/extensions/gsd/doctor-types.ts
@@ -61,6 +61,8 @@ export type DoctorIssueCode =
   | "worktree_stale"
   | "worktree_dirty"
   | "worktree_unpushed"
+  // Stale commit safety check
+  | "stale_uncommitted_changes"
   // Snapshot ref bloat
   | "snapshot_ref_bloat"
   // Runtime data integrity
diff --git a/src/resources/extensions/gsd/git-service.ts b/src/resources/extensions/gsd/git-service.ts
index 53c8d85a2..4769bd3d6 100644
--- a/src/resources/extensions/gsd/git-service.ts
+++ b/src/resources/extensions/gsd/git-service.ts
@@ -32,6 +32,8 @@ import {
   nativeRmCached,
   nativeUpdateRef,
   nativeAddPaths,
+  nativeResetSoft,
+  nativeCommitSubject,
 } from "./native-git-bridge.js";
 import { GSDError, GSD_MERGE_CONFLICT, GSD_GIT_ERROR } from "./errors.js";
 import { getErrorMessage } from "./error-utils.js";
@@ -77,6 +79,11 @@ export interface GitPreferences {
    *  Default: the main branch (from `main_branch` or auto-detected).
    */
   pr_target_branch?: string;
+  /** Whether to squash `gsd snapshot:` commits into the next real autoCommit.
+   *  Enabled by default. Set to false to keep snapshot commits in history
+   *  for forensic inspection.
+   */
+  absorb_snapshot_commits?: boolean;
 }
 
 export const VALID_BRANCH_NAME = /^[a-zA-Z0-9_\-\/.]+$/;
@@ -563,9 +570,86 @@ export class GitServiceImpl {
       ? buildTaskCommitMessage(taskContext)
       : `chore: auto-commit after ${unitType}\n\nGSD-Unit: ${unitId}`;
     nativeCommit(this.basePath, message, { allowEmpty: false });
+
+    // Absorb any preceding gsd snapshot commits into this real commit.
+    // Walk backwards from HEAD~1 counting consecutive snapshot subjects,
+    // then soft-reset to before them and re-commit with the same message.
+    this.absorbSnapshotCommits(message);
+
     return message;
   }
 
+  /**
+   * Squash consecutive `gsd snapshot:` commits that sit immediately below
+   * HEAD into the current HEAD commit. This keeps the git history clean
+   * after automated snapshot commits are superseded by real work.
+   *
+   * Guards:
+   * - Opt-in via `absorb_snapshot_commits` preference (default: true).
+   * - Refuses to rewrite commits that have been pushed to the remote
+   *   tracking branch (checks merge-base ancestry).
+   * - Saves HEAD SHA before reset; restores it if the re-commit fails.
+   *
+   * Does nothing if there are no snapshot commits to absorb.
+   */
+  private absorbSnapshotCommits(headMessage: string): void {
+    try {
+      // Opt-in guard — users can disable to keep snapshot commits for forensics
+      if (this.prefs.absorb_snapshot_commits === false) return;
+
+      const GSD_SNAPSHOT_PREFIX = "gsd snapshot:";
+      let count = 0;
+
+      // Walk back from HEAD~1 counting consecutive snapshot commits (cap at 10)
+      for (let i = 1; i <= 10; i++) {
+        const subject = nativeCommitSubject(this.basePath, `HEAD~${i}`);
+        if (!subject.startsWith(GSD_SNAPSHOT_PREFIX)) break;
+        count = i;
+      }
+
+      if (count === 0) return;
+
+      // Guard: don't rewrite history that has been pushed to the remote.
+      // If the reset target is an ancestor of the remote tracking branch,
+      // those commits are published and must not be squashed.
+      const resetTarget = `HEAD~${count + 1}`;
+      try {
+        const branch = nativeGetCurrentBranch(this.basePath);
+        if (branch) {
+          const remoteBranch = `origin/${branch}`;
+          // merge-base --is-ancestor exits 0 if resetTarget is ancestor of remote
+          execFileSync("git", ["merge-base", "--is-ancestor", resetTarget, remoteBranch], {
+            cwd: this.basePath,
+            stdio: ["ignore", "pipe", "pipe"],
+          });
+          // If we get here, resetTarget IS an ancestor of remote — snapshots are pushed
+          return;
+        }
+      } catch {
+        // Not an ancestor or remote doesn't exist — safe to proceed
+      }
+
+      // Save HEAD SHA so we can restore if the re-commit fails
+      const savedHead = execFileSync("git", ["rev-parse", "HEAD"], {
+        cwd: this.basePath,
+        stdio: ["ignore", "pipe", "pipe"],
+        encoding: "utf-8",
+      }).trim();
+
+      nativeResetSoft(this.basePath, resetTarget);
+
+      try {
+        nativeCommit(this.basePath, headMessage, { allowEmpty: false });
+      } catch {
+        // Re-commit failed — restore original HEAD to avoid leaving the
+        // repo in a partially-reset state with no commit
+        nativeResetSoft(this.basePath, savedHead);
+      }
+    } catch {
+      // Non-fatal — if squash fails, the commits remain unsquashed
+    }
+  }
+
   // ─── Branch Queries ────────────────────────────────────────────────────
 
   /**
diff --git a/src/resources/extensions/gsd/native-git-bridge.ts b/src/resources/extensions/gsd/native-git-bridge.ts
index 48426dd14..76c140251 100644
--- a/src/resources/extensions/gsd/native-git-bridge.ts
+++ b/src/resources/extensions/gsd/native-git-bridge.ts
@@ -680,6 +680,16 @@ export function nativeAddAll(basePath: string): void {
   gitFileExec(basePath, ["add", "-A"]);
 }
 
+/**
+ * Stage only already-tracked files (git add -u).
+ * Does NOT add new untracked files — only updates modifications and deletions
+ * for files git already knows about. Safe for automated snapshots where
+ * pulling in unknown untracked files (secrets, binaries) would be dangerous.
+ */
+export function nativeAddTracked(basePath: string): void {
+  gitFileExec(basePath, ["add", "-u"]);
+}
+
 /**
  * Stage all files with pathspec exclusions (git add -A -- ':!pattern' ...).
  * Excluded paths are never hashed by git, preventing hangs on large
@@ -931,6 +941,20 @@ export function nativeResetHard(basePath: string): void {
   execSync("git reset --hard HEAD", { cwd: basePath, stdio: "pipe" });
 }
 
+/**
+ * Soft reset to a target ref (git reset --soft <ref>).
+ * Moves HEAD to `target` while keeping all changes staged in the index.
+ * Used to squash snapshot commits back into a single real commit.
+ */
+export function nativeResetSoft(basePath: string, target: string): void {
+  execFileSync("git", ["reset", "--soft", target], {
+    cwd: basePath,
+    stdio: ["ignore", "pipe", "pipe"],
+    encoding: "utf-8",
+    env: GIT_NO_PROMPT_ENV,
+  });
+}
+
 /**
  * Get the subject line of a commit (git log -1 --format=%s <ref>).
  * Returns empty string if the ref doesn't exist.
diff --git a/src/resources/extensions/gsd/preferences-types.ts b/src/resources/extensions/gsd/preferences-types.ts
index 443dc4920..7ae8c9bda 100644
--- a/src/resources/extensions/gsd/preferences-types.ts
+++ b/src/resources/extensions/gsd/preferences-types.ts
@@ -93,6 +93,7 @@ export const KNOWN_PREFERENCE_KEYS = new Set<string>([
   "service_tier",
   "forensics_dedup",
   "show_token_cost",
+  "stale_commit_threshold_minutes",
   "experimental",
 ]);
 
@@ -253,6 +254,13 @@ export interface GSDPreferences {
   forensics_dedup?: boolean;
   /** Opt-in: show per-prompt and cumulative session token cost in the footer. Default: false. */
   show_token_cost?: boolean;
+  /**
+   * Minutes without a commit before flagging uncommitted changes as stale.
+   * When the threshold is exceeded and the working tree is dirty, doctor will
+   * auto-commit a safety snapshot tagged with `[gsd safety]`. Default: 30.
+   * Set to 0 to disable.
+   */
+  stale_commit_threshold_minutes?: number;
   /**
    * Opt-in experimental features. All features here are disabled by default.
    * See the preferences reference for details on each feature.
diff --git a/src/resources/extensions/gsd/tests/integration/doctor-git.test.ts b/src/resources/extensions/gsd/tests/integration/doctor-git.test.ts
index d307627a3..4d58083d1 100644
--- a/src/resources/extensions/gsd/tests/integration/doctor-git.test.ts
+++ b/src/resources/extensions/gsd/tests/integration/doctor-git.test.ts
@@ -645,6 +645,78 @@ describe('doctor-git', async () => {
     } else {
     }
 
+    // ─── Test: stale_uncommitted_changes detection & auto-snapshot ──────
+    test('stale_uncommitted_changes (detected and auto-committed)', async () => {
+      const dir = createRepoWithActiveMilestone();
+      cleanups.push(dir);
+
+      // Make the last commit appear old by amending its date to 45 min ago
+      const pastDate = new Date(Date.now() - 45 * 60 * 1000).toISOString();
+      run(`git commit --amend --no-edit --date="${pastDate}"`, dir);
+      // Also set committer date so git log %ct reflects it
+      execSync(`git commit --amend --no-edit`, {
+        cwd: dir,
+        stdio: ["ignore", "pipe", "pipe"],
+        encoding: "utf-8",
+        env: { ...process.env, GIT_COMMITTER_DATE: pastDate },
+      });
+
+      // Modify an already-tracked file (nativeAddTracked uses git add -u,
+      // which only stages tracked files — new untracked files are not staged)
+      writeFileSync(join(dir, "README.md"), "# test\nmodified content\n");
+
+      const detect = await runGSDDoctor(dir);
+      const staleIssues = detect.issues.filter(i => i.code === "stale_uncommitted_changes");
+      assert.ok(staleIssues.length > 0, "detects stale uncommitted changes");
+      assert.ok(staleIssues[0]?.message.includes("minute"), "message mentions minutes");
+      assert.ok(staleIssues[0]?.fixable === true, "stale uncommitted changes is fixable");
+
+      // Fix should create a gsd snapshot commit
+      const fixed = await runGSDDoctor(dir, { fix: true });
+      assert.ok(
+        fixed.fixesApplied.some(f => f.includes("gsd snapshot")),
+        "fix creates a gsd snapshot commit",
+      );
+
+      // Verify the snapshot commit was created with the gsd snapshot tag
+      const log = run("git log -1 --oneline", dir);
+      assert.ok(log.includes("gsd snapshot"), "commit is tagged with gsd snapshot");
+    });
+
+    // ─── Test: stale_uncommitted_changes NOT flagged when recent commit ──
+    test('stale_uncommitted_changes (no false positive on recent commit)', async () => {
+      const dir = createRepoWithActiveMilestone();
+      cleanups.push(dir);
+
+      // Create uncommitted changes (but last commit is fresh — just created)
+      writeFileSync(join(dir, "fresh-dirty.txt"), "recent changes\n");
+
+      const detect = await runGSDDoctor(dir);
+      const staleIssues = detect.issues.filter(i => i.code === "stale_uncommitted_changes");
+      assert.deepStrictEqual(staleIssues.length, 0, "recent commit with dirty tree NOT flagged as stale");
+    });
+
+    // ─── Test: stale_uncommitted_changes NOT flagged when tree is clean ──
+    test('stale_uncommitted_changes (no false positive on clean tree)', async () => {
+      const dir = createRepoWithActiveMilestone();
+      cleanups.push(dir);
+
+      // Make the last commit appear old
+      const pastDate = new Date(Date.now() - 45 * 60 * 1000).toISOString();
+      run(`git commit --amend --no-edit --date="${pastDate}"`, dir);
+      execSync(`git commit --amend --no-edit`, {
+        cwd: dir,
+        stdio: ["ignore", "pipe", "pipe"],
+        encoding: "utf-8",
+        env: { ...process.env, GIT_COMMITTER_DATE: pastDate },
+      });
+
+      // No uncommitted changes — tree is clean
+      const detect = await runGSDDoctor(dir);
+      const staleIssues = detect.issues.filter(i => i.code === "stale_uncommitted_changes");
+      assert.deepStrictEqual(staleIssues.length, 0, "old commit with clean tree NOT flagged as stale");
+    });
+
   } finally {
     for (const dir of cleanups) {
       try { rmSync(dir, { recursive: true, force: true }); } catch { /* ignore */ }
diff --git a/src/resources/extensions/gsd/tests/integration/git-service.test.ts b/src/resources/extensions/gsd/tests/integration/git-service.test.ts
index d1ba7a7ff..2c7d23fc8 100644
--- a/src/resources/extensions/gsd/tests/integration/git-service.test.ts
+++ b/src/resources/extensions/gsd/tests/integration/git-service.test.ts
@@ -1455,4 +1455,72 @@ describe('git-service', async () => {
     try { rmSync(repo, { recursive: true, force: true }); } catch {}
     try { rmSync(externalGsd, { recursive: true, force: true }); } catch {}
   });
+
+  // ─── autoCommit: absorbs preceding gsd snapshot commits ─────────────────
+
+  test('autoCommit: absorbs preceding gsd snapshot commits', () => {
+    const repo = initTempRepo();
+
+    // Simulate 2 gsd snapshot commits
+    createFile(repo, "file1.ts", "v1");
+    run("git add -A", repo);
+    run('git commit -m "gsd snapshot: uncommitted changes after 35m inactivity"', repo);
+
+    createFile(repo, "file2.ts", "v2");
+    run("git add -A", repo);
+    run('git commit -m "gsd snapshot: pre-dispatch, uncommitted changes after 40m inactivity"', repo);
+
+    // Verify we have 3 commits (init + 2 snapshots)
+    const countBefore = run("git rev-list --count HEAD", repo);
+    assert.deepStrictEqual(countBefore, "3", "precondition: 3 commits before autoCommit");
+
+    // Now make a real change and autoCommit
+    createFile(repo, "feature.ts", "real work");
+
+    const svc = new GitServiceImpl(repo);
+    const msg = svc.autoCommit("execute-task", "S01/T01");
+    assert.ok(msg !== null, "autoCommit succeeds");
+
+    // Should be 2 commits: init + squashed real commit (snapshots absorbed)
+    const countAfter = run("git rev-list --count HEAD", repo);
+    assert.deepStrictEqual(countAfter, "2", "snapshot commits absorbed into real commit");
+
+    // All files should be present
+    const files = run("git show --name-only HEAD", repo);
+    assert.ok(files.includes("file1.ts"), "file1.ts from snapshot 1 preserved");
+    assert.ok(files.includes("file2.ts"), "file2.ts from snapshot 2 preserved");
+    assert.ok(files.includes("feature.ts"), "feature.ts from real commit preserved");
+
+    // No gsd snapshot commits in log
+    const log = run("git log --oneline", repo);
+    assert.ok(!log.includes("gsd snapshot"), "no gsd snapshot commits remain in history");
+
+    rmSync(repo, { recursive: true, force: true });
+  });
+
+  // ─── autoCommit: does not absorb non-snapshot commits ───────────────────
+
+  test('autoCommit: does not absorb non-snapshot commits', () => {
+    const repo = initTempRepo();
+
+    // Create a normal (non-snapshot) commit
+    createFile(repo, "earlier.ts", "earlier work");
+    run("git add -A", repo);
+    run('git commit -m "feat: earlier work"', repo);
+
+    const countBefore = run("git rev-list --count HEAD", repo);
+    assert.deepStrictEqual(countBefore, "2", "precondition: 2 commits before autoCommit");
+
+    // Make a real change and autoCommit
+    createFile(repo, "feature.ts", "new work");
+
+    const svc = new GitServiceImpl(repo);
+    svc.autoCommit("execute-task", "S01/T02");
+
+    // Should be 3 commits — earlier commit not absorbed
+    const countAfter = run("git rev-list --count HEAD", repo);
+    assert.deepStrictEqual(countAfter, "3", "non-snapshot commits NOT absorbed");
+
+    rmSync(repo, { recursive: true, force: true });
+  });
 });