diff --git a/docs/api/routines.md b/docs/api/routines.md
index eb6b9adc382..2ad279a74fd 100644
--- a/docs/api/routines.md
+++ b/docs/api/routines.md
@@ -75,11 +75,28 @@ Fields:
 ```
 PATCH /api/routines/{routineId}
 {
-  "status": "paused"
+  "status": "paused",
+  "baseRevisionId": "{latestRevisionId}"
 }
 ```
 
-All fields from create are updatable. **Agents can only update routines assigned to themselves and cannot reassign a routine to another agent.**
+All fields from create are updatable. `baseRevisionId` is optional for backward compatibility; when provided, stale values return `409 Conflict` with the current revision id. **Agents can only update routines assigned to themselves and cannot reassign a routine to another agent.**
+
+## List Revisions
+
+```
+GET /api/routines/{routineId}/revisions
+```
+
+Returns append-only routine definition revisions newest first. Snapshots include routine fields and safe trigger metadata only; webhook secret values and `secretId` are never returned.
+
+## Restore Revision
+
+```
+POST /api/routines/{routineId}/revisions/{revisionId}/restore
+```
+
+Restores a historical routine definition by creating a new latest revision copied from the selected revision. Historical revision rows, routine run history, and activity history are preserved. If restoring a deleted webhook trigger requires recreating it, the response can include one-time replacement secret material for that trigger.
 
 ## Add Trigger
 
diff --git a/server/src/__tests__/routines-routes.test.ts b/server/src/__tests__/routines-routes.test.ts
index 35b6b355f0a..d541f0cf909 100644
--- a/server/src/__tests__/routines-routes.test.ts
+++ b/server/src/__tests__/routines-routes.test.ts
@@ -7,6 +7,7 @@ const agentId = "11111111-1111-4111-8111-111111111111";
 const routineId = "33333333-3333-4333-8333-333333333333";
 const projectId = "44444444-4444-4444-8444-444444444444";
 const otherAgentId = "55555555-5555-4555-8555-555555555555";
+const revisionId = "77777777-7777-4777-8777-777777777777";
 
 const routine = {
   id: routineId,
@@ -21,6 +22,9 @@ const routine = {
   status: "active",
   concurrencyPolicy: "coalesce_if_active",
   catchUpPolicy: "skip_missed",
+  variables: [],
+  latestRevisionId: revisionId,
+  latestRevisionNumber: 1,
   createdByAgentId: null,
   createdByUserId: null,
   updatedByAgentId: null,
@@ -30,6 +34,40 @@ const routine = {
   createdAt: new Date("2026-03-20T00:00:00.000Z"),
   updatedAt: new Date("2026-03-20T00:00:00.000Z"),
 };
+
+const revision = {
+  id: revisionId,
+  companyId,
+  routineId,
+  revisionNumber: 1,
+  title: "Daily routine",
+  description: null,
+  snapshot: {
+    version: 1,
+    routine: {
+      id: routineId,
+      companyId,
+      projectId,
+      goalId: null,
+      parentIssueId: null,
+      title: "Daily routine",
+      description: null,
+      assigneeAgentId: agentId,
+      priority: "medium",
+      status: "active",
+      concurrencyPolicy: "coalesce_if_active",
+      catchUpPolicy: "skip_missed",
+      variables: [],
+    },
+    triggers: [],
+  },
+  changeSummary: "Created routine",
+  restoredFromRevisionId: null,
+  createdByAgentId: null,
+  createdByUserId: "board-user",
+  createdByRunId: null,
+  createdAt: new Date("2026-03-20T00:00:00.000Z"),
+};
 const pausedRoutine = {
   ...routine,
   status: "paused",
@@ -65,6 +103,8 @@ const mockRoutineService = vi.hoisted(() => ({
   getDetail: vi.fn(),
   update: vi.fn(),
   create: vi.fn(),
+  listRevisions: vi.fn(),
+  restoreRevision: vi.fn(),
   listRuns: vi.fn(),
   createTrigger: vi.fn(),
   getTrigger: vi.fn(),
@@ -150,6 +190,14 @@ describe("routine routes", () => {
     mockRoutineService.get.mockResolvedValue(routine);
     mockRoutineService.getTrigger.mockResolvedValue(trigger);
     mockRoutineService.update.mockResolvedValue({ ...routine, assigneeAgentId: otherAgentId });
+    mockRoutineService.listRevisions.mockResolvedValue([revision]);
+    mockRoutineService.restoreRevision.mockResolvedValue({
+      routine,
+      revision: { ...revision, revisionNumber: 2, restoredFromRevisionId: revision.id },
+      restoredFromRevisionId: revision.id,
+      restoredFromRevisionNumber: revision.revisionNumber,
+      secretMaterials: [],
+    });
     mockRoutineService.runRoutine.mockResolvedValue({
       id: "run-1",
       source: "manual",
@@ -176,6 +224,73 @@ describe("routine routes", () => {
     expect(mockRoutineService.list).toHaveBeenCalledWith(companyId, { projectId });
   });
 
+  it("lists routine revisions for a board member in newest-first service order", async () => {
+    const app = await createApp({
+      type: "board",
+      userId: "board-user",
+      source: "session",
+      isInstanceAdmin: true,
+      companyIds: [companyId],
+    });
+
+    const res = await request(app).get(`/api/routines/${routineId}/revisions`);
+
+    expect(res.status).toBe(200);
+    expect(mockRoutineService.listRevisions).toHaveBeenCalledWith(routineId);
+    expect(res.body[0]).toMatchObject({ id: revisionId, revisionNumber: 1 });
+  });
+
+  it("blocks routine revision reads across company scope", async () => {
+    const app = await createApp({
+      type: "board",
+      userId: "board-user",
+      source: "session",
+      isInstanceAdmin: false,
+      companyIds: ["99999999-9999-4999-8999-999999999999"],
+    });
+
+    const res = await request(app).get(`/api/routines/${routineId}/revisions`);
+
+    expect(res.status).toBe(403);
+    expect(mockRoutineService.listRevisions).not.toHaveBeenCalled();
+  });
+
+  it("requires an assigned agent for routine revision history access", async () => {
+    const app = await createApp({
+      type: "agent",
+      agentId: otherAgentId,
+      companyId,
+    });
+
+    const res = await request(app).get(`/api/routines/${routineId}/revisions`);
+
+    expect(res.status).toBe(403);
+    expect(mockRoutineService.listRevisions).not.toHaveBeenCalled();
+  });
+
+  it("restores routine revisions with existing routine-management permissions", async () => {
+    const app = await createApp({
+      type: "agent",
+      agentId,
+      companyId,
+      runId: "88888888-8888-4888-8888-888888888888",
+    });
+
+    const res = await request(app).post(`/api/routines/${routineId}/revisions/${revisionId}/restore`).send({});
+
+    expect(res.status).toBe(200);
+    expect(mockRoutineService.restoreRevision).toHaveBeenCalledWith(routineId, revisionId, {
+      agentId,
+      userId: null,
+      runId: "88888888-8888-4888-8888-888888888888",
+    });
+    expect(mockLogActivity).toHaveBeenCalledWith(expect.anything(), expect.objectContaining({
+      action: "routine.revision_restored",
+      entityId: routineId,
+      runId: "88888888-8888-4888-8888-888888888888",
+    }));
+  });
+
   it("requires tasks:assign permission for non-admin board routine creation", async () => {
     const app = await createApp({
       type: "board",
@@ -348,6 +463,7 @@ describe("routine routes", () => {
     }), {
       agentId: null,
       userId: "board-user",
+      runId: null,
     });
     expect(mockTrackRoutineCreated).toHaveBeenCalledWith(expect.anything());
   });
diff --git a/server/src/__tests__/routines-service.test.ts b/server/src/__tests__/routines-service.test.ts
index 45769877c09..7d02c8d04e0 100644
--- a/server/src/__tests__/routines-service.test.ts
+++ b/server/src/__tests__/routines-service.test.ts
@@ -283,6 +283,113 @@ describeEmbeddedPostgres("routine service live-execution coalescing", () => {
     expect(routine.status).toBe("paused");
   });
 
+  it("creates revision 1 on routine create and appends revisions for real updates only", async () => {
+    const { routine, svc } = await seedFixture();
+
+    const initialRevisions = await svc.listRevisions(routine.id);
+    expect(initialRevisions).toHaveLength(1);
+    expect(initialRevisions[0]).toMatchObject({
+      id: routine.latestRevisionId,
+      revisionNumber: 1,
+      title: "ascii frog",
+      changeSummary: "Created routine",
+    });
+    expect(initialRevisions[0]?.snapshot.routine.description).toBe("Run the frog routine");
+
+    const updated = await svc.update(
+      routine.id,
+      {
+        description: "Run the frog routine with logs",
+        baseRevisionId: routine.latestRevisionId,
+      },
+      {},
+    );
+    expect(updated?.latestRevisionNumber).toBe(2);
+    expect(updated?.latestRevisionId).not.toBe(routine.latestRevisionId);
+
+    const noOp = await svc.update(
+      routine.id,
+      {
+        description: "Run the frog routine with logs",
+        baseRevisionId: updated?.latestRevisionId,
+      },
+      {},
+    );
+    expect(noOp?.latestRevisionId).toBe(updated?.latestRevisionId);
+    expect(noOp?.latestRevisionNumber).toBe(2);
+
+    const revisions = await svc.listRevisions(routine.id);
+    expect(revisions.map((revision) => revision.revisionNumber)).toEqual([2, 1]);
+    expect(revisions[0]?.snapshot.routine.description).toBe("Run the frog routine with logs");
+    expect(revisions[1]?.snapshot.routine.description).toBe("Run the frog routine");
+  });
+
+  it("rejects stale routine baseRevisionId updates", async () => {
+    const { routine, svc } = await seedFixture();
+    const updated = await svc.update(routine.id, { description: "new description" }, {});
+    await expect(
+      svc.update(routine.id, {
+        title: "stale update",
+        baseRevisionId: routine.latestRevisionId,
+      }, {}),
+    ).rejects.toMatchObject({
+      status: 409,
+      details: {
+        currentRevisionId: updated?.latestRevisionId,
+      },
+    });
+  });
+
+  it("restores an older routine revision append-only and preserves run history", async () => {
+    const { routine, svc } = await seedFixture();
+    const revision1Id = routine.latestRevisionId!;
+    const run = await svc.runRoutine(routine.id, { source: "manual" });
+    const revision2Routine = await svc.update(routine.id, { description: "revision 2" }, {});
+
+    const restored = await svc.restoreRevision(routine.id, revision1Id, {});
+
+    expect(restored.restoredFromRevisionId).toBe(revision1Id);
+    expect(restored.restoredFromRevisionNumber).toBe(1);
+    expect(restored.routine.latestRevisionNumber).toBe(3);
+    expect(restored.routine.latestRevisionId).not.toBe(revision2Routine?.latestRevisionId);
+    expect(restored.routine.description).toBe("Run the frog routine");
+    expect(restored.revision.restoredFromRevisionId).toBe(revision1Id);
+    expect(restored.revision.snapshot.routine.description).toBe("Run the frog routine");
+
+    const revisions = await svc.listRevisions(routine.id);
+    expect(revisions.map((revision) => revision.revisionNumber)).toEqual([3, 2, 1]);
+    await expect(db.select().from(routineRuns).where(eq(routineRuns.id, run.id))).resolves.toHaveLength(1);
+  });
+
+  it("appends safe trigger metadata revisions without leaking webhook secrets", async () => {
+    const { routine, svc } = await seedFixture();
+    const created = await svc.createTrigger(routine.id, {
+      kind: "webhook",
+      signingMode: "bearer",
+      replayWindowSec: 300,
+    }, {});
+    expect(created.revision.revisionNumber).toBe(2);
+    expect(created.secretMaterial?.webhookSecret).toBeTruthy();
+
+    const updated = await svc.updateTrigger(created.trigger.id, { label: "deploy hook" }, {});
+    expect(updated?.revision.revisionNumber).toBe(3);
+
+    const rotated = await svc.rotateTriggerSecret(created.trigger.id, {});
+    expect(rotated.revision.revisionNumber).toBe(4);
+    expect(rotated.secretMaterial.webhookSecret).toBeTruthy();
+
+    const deleted = await svc.deleteTrigger(created.trigger.id, {});
+    expect(deleted.revision?.revisionNumber).toBe(5);
+
+    const revisions = await svc.listRevisions(routine.id);
+    const serialized = JSON.stringify(revisions.map((revision) => revision.snapshot));
+    expect(serialized).toContain(created.trigger.publicId!);
+    expect(serialized).not.toContain(created.secretMaterial!.webhookSecret);
+    expect(serialized).not.toContain(rotated.secretMaterial.webhookSecret);
+    expect(serialized).not.toContain(created.trigger.secretId!);
+    expect(revisions[0]?.snapshot.triggers).toHaveLength(0);
+  });
+
   it("wakes the assignee when a routine creates a fresh execution issue", async () => {
     const { agentId, routine, svc, wakeups } = await seedFixture();
 
diff --git a/server/src/routes/routines.ts b/server/src/routes/routines.ts
index 5bae6bdb45c..d5d9d35f082 100644
--- a/server/src/routes/routines.ts
+++ b/server/src/routes/routines.ts
@@ -57,6 +57,34 @@ export function routineRoutes(
     return routine;
   }
 
+  async function logRoutineRevisionCreated(req: Request, input: {
+    companyId: string;
+    routineId: string;
+    revisionId: string | null;
+    revisionNumber: number;
+    changeSummary?: string | null;
+    triggerCount?: number | null;
+  }) {
+    if (!input.revisionId) return;
+    const actor = getActorInfo(req);
+    await logActivity(db, {
+      companyId: input.companyId,
+      actorType: actor.actorType,
+      actorId: actor.actorId,
+      agentId: actor.agentId,
+      runId: actor.runId,
+      action: "routine.revision_created",
+      entityType: "routine",
+      entityId: input.routineId,
+      details: {
+        revisionId: input.revisionId,
+        revisionNumber: input.revisionNumber,
+        changeSummary: input.changeSummary ?? null,
+        triggerCount: input.triggerCount ?? null,
+      },
+    });
+  }
+
   router.get("/companies/:companyId/routines", async (req, res) => {
     const companyId = req.params.companyId as string;
     assertCompanyAccess(req, companyId);
@@ -72,6 +100,7 @@ export function routineRoutes(
     const created = await svc.create(companyId, req.body, {
       agentId: req.actor.type === "agent" ? req.actor.agentId : null,
       userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+      runId: req.actor.runId ?? null,
     });
     const actor = getActorInfo(req);
     await logActivity(db, {
@@ -89,6 +118,14 @@ export function routineRoutes(
     if (telemetryClient) {
       trackRoutineCreated(telemetryClient);
     }
+    await logRoutineRevisionCreated(req, {
+      companyId,
+      routineId: created.id,
+      revisionId: created.latestRevisionId,
+      revisionNumber: created.latestRevisionNumber,
+      changeSummary: "Created routine",
+      triggerCount: 0,
+    });
     res.status(201).json(created);
   });
 
@@ -102,6 +139,16 @@ export function routineRoutes(
     res.json(detail);
   });
 
+  router.get("/routines/:id/revisions", async (req, res) => {
+    const routine = await assertCanManageExistingRoutine(req, req.params.id as string);
+    if (!routine) {
+      res.status(404).json({ error: "Routine not found" });
+      return;
+    }
+    const revisions = await svc.listRevisions(routine.id);
+    res.json(revisions);
+  });
+
   router.patch("/routines/:id", validate(updateRoutineSchema), async (req, res) => {
     const routine = await assertCanManageExistingRoutine(req, req.params.id as string);
     if (!routine) {
@@ -131,6 +178,7 @@ export function routineRoutes(
     const updated = await svc.update(routine.id, req.body, {
       agentId: req.actor.type === "agent" ? req.actor.agentId : null,
       userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+      runId: req.actor.runId ?? null,
     });
     const actor = getActorInfo(req);
     await logActivity(db, {
@@ -144,9 +192,52 @@ export function routineRoutes(
       entityId: routine.id,
       details: { title: updated?.title ?? routine.title },
     });
+    if (updated && updated.latestRevisionId !== routine.latestRevisionId) {
+      await logRoutineRevisionCreated(req, {
+        companyId: routine.companyId,
+        routineId: routine.id,
+        revisionId: updated.latestRevisionId,
+        revisionNumber: updated.latestRevisionNumber,
+        changeSummary: "Updated routine",
+        triggerCount: null,
+      });
+    }
     res.json(updated);
   });
 
+  router.post("/routines/:id/revisions/:revisionId/restore", async (req, res) => {
+    const routine = await assertCanManageExistingRoutine(req, req.params.id as string);
+    if (!routine) {
+      res.status(404).json({ error: "Routine not found" });
+      return;
+    }
+    await assertBoardCanAssignTasks(req, routine.companyId);
+    const result = await svc.restoreRevision(routine.id, req.params.revisionId as string, {
+      agentId: req.actor.type === "agent" ? req.actor.agentId : null,
+      userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+      runId: req.actor.runId ?? null,
+    });
+    const actor = getActorInfo(req);
+    await logActivity(db, {
+      companyId: routine.companyId,
+      actorType: actor.actorType,
+      actorId: actor.actorId,
+      agentId: actor.agentId,
+      runId: actor.runId,
+      action: "routine.revision_restored",
+      entityType: "routine",
+      entityId: routine.id,
+      details: {
+        revisionId: result.revision.id,
+        revisionNumber: result.revision.revisionNumber,
+        restoredFromRevisionId: result.restoredFromRevisionId,
+        restoredFromRevisionNumber: result.restoredFromRevisionNumber,
+        triggerCount: result.revision.snapshot.triggers.length,
+      },
+    });
+    res.json(result);
+  });
+
   router.get("/routines/:id/runs", async (req, res) => {
     const routine = await svc.get(req.params.id as string);
     if (!routine) {
@@ -169,6 +260,7 @@ export function routineRoutes(
     const created = await svc.createTrigger(routine.id, req.body, {
       agentId: req.actor.type === "agent" ? req.actor.agentId : null,
       userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+      runId: req.actor.runId ?? null,
     });
     const actor = getActorInfo(req);
     await logActivity(db, {
@@ -182,6 +274,14 @@ export function routineRoutes(
       entityId: created.trigger.id,
       details: { routineId: routine.id, kind: created.trigger.kind },
     });
+    await logRoutineRevisionCreated(req, {
+      companyId: routine.companyId,
+      routineId: routine.id,
+      revisionId: created.revision.id,
+      revisionNumber: created.revision.revisionNumber,
+      changeSummary: created.revision.changeSummary,
+      triggerCount: created.revision.snapshot.triggers.length,
+    });
     res.status(201).json(created);
   });
 
@@ -200,6 +300,7 @@ export function routineRoutes(
     const updated = await svc.updateTrigger(trigger.id, req.body, {
       agentId: req.actor.type === "agent" ? req.actor.agentId : null,
       userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+      runId: req.actor.runId ?? null,
     });
     const actor = getActorInfo(req);
     await logActivity(db, {
@@ -211,9 +312,19 @@ export function routineRoutes(
       action: "routine.trigger_updated",
       entityType: "routine_trigger",
       entityId: trigger.id,
-      details: { routineId: routine.id, kind: updated?.kind ?? trigger.kind },
+      details: { routineId: routine.id, kind: updated?.trigger.kind ?? trigger.kind },
     });
-    res.json(updated);
+    if (updated) {
+      await logRoutineRevisionCreated(req, {
+        companyId: routine.companyId,
+        routineId: routine.id,
+        revisionId: updated.revision.id,
+        revisionNumber: updated.revision.revisionNumber,
+        changeSummary: updated.revision.changeSummary,
+        triggerCount: updated.revision.snapshot.triggers.length,
+      });
+    }
+    res.json(updated?.trigger ?? null);
   });
 
   router.delete("/routine-triggers/:id", async (req, res) => {
@@ -227,7 +338,11 @@ export function routineRoutes(
       res.status(404).json({ error: "Routine not found" });
       return;
     }
-    await svc.deleteTrigger(trigger.id);
+    const deleted = await svc.deleteTrigger(trigger.id, {
+      agentId: req.actor.type === "agent" ? req.actor.agentId : null,
+      userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+      runId: req.actor.runId ?? null,
+    });
     const actor = getActorInfo(req);
     await logActivity(db, {
       companyId: routine.companyId,
@@ -240,6 +355,16 @@ export function routineRoutes(
       entityId: trigger.id,
       details: { routineId: routine.id, kind: trigger.kind },
     });
+    if (deleted.revision) {
+      await logRoutineRevisionCreated(req, {
+        companyId: routine.companyId,
+        routineId: routine.id,
+        revisionId: deleted.revision.id,
+        revisionNumber: deleted.revision.revisionNumber,
+        changeSummary: deleted.revision.changeSummary,
+        triggerCount: deleted.revision.snapshot.triggers.length,
+      });
+    }
     res.status(204).end();
   });
 
@@ -260,6 +385,7 @@ export function routineRoutes(
       const rotated = await svc.rotateTriggerSecret(trigger.id, {
         agentId: req.actor.type === "agent" ? req.actor.agentId : null,
         userId: req.actor.type === "board" ? req.actor.userId ?? "board" : null,
+        runId: req.actor.runId ?? null,
       });
       const actor = getActorInfo(req);
       await logActivity(db, {
@@ -273,6 +399,14 @@ export function routineRoutes(
         entityId: trigger.id,
         details: { routineId: routine.id },
       });
+      await logRoutineRevisionCreated(req, {
+        companyId: routine.companyId,
+        routineId: routine.id,
+        revisionId: rotated.revision.id,
+        revisionNumber: rotated.revision.revisionNumber,
+        changeSummary: rotated.revision.changeSummary,
+        triggerCount: rotated.revision.snapshot.triggers.length,
+      });
       res.json(rotated);
     },
   );
diff --git a/server/src/services/routines.ts b/server/src/services/routines.ts
index b1242624f9f..67bbccdf725 100644
--- a/server/src/services/routines.ts
+++ b/server/src/services/routines.ts
@@ -1,5 +1,5 @@
 import crypto from "node:crypto";
-import { and, asc, desc, eq, inArray, isNotNull, isNull, lte, ne, or, sql } from "drizzle-orm";
+import { and, asc, desc, eq, inArray, isNotNull, isNull, lte, ne, not, or, sql } from "drizzle-orm";
 import type { Db } from "@paperclipai/db";
 import {
   agents,
@@ -13,6 +13,7 @@ import {
   pluginManagedResources,
   plugins,
   projects,
+  routineRevisions,
   routineRuns,
   routines,
   routineTriggers,
@@ -24,6 +25,8 @@ import type {
   RoutineDetail,
   RoutineListItem,
   RoutineManagedByPlugin,
+  RoutineRevision,
+  RoutineRevisionSnapshotV1,
   RoutineRunSummary,
   RoutineTrigger,
   RoutineTriggerSecretMaterial,
@@ -67,7 +70,13 @@ const WEEKDAY_INDEX: Record<string, number> = {
   Sat: 6,
 };
 
-type Actor = { agentId?: string | null; userId?: string | null };
+type Actor = { agentId?: string | null; userId?: string | null; runId?: string | null };
+type RoutineRow = typeof routines.$inferSelect;
+type RoutineTriggerRow = typeof routineTriggers.$inferSelect;
+
+interface RoutineTriggerSecretRestoreMaterial extends RoutineTriggerSecretMaterial {
+  triggerId: string;
+}
 
 function assertTimeZone(timeZone: string) {
   try {
@@ -373,6 +382,77 @@ function routineUsesWorkspaceBranch(routine: typeof routines.$inferSelect) {
     || extractRoutineVariableNames([routine.title, routine.description]).includes(WORKSPACE_BRANCH_ROUTINE_VARIABLE);
 }
 
+function routineRevisionSnapshotRoutine(routine: RoutineRow): RoutineRevisionSnapshotV1["routine"] {
+  return {
+    id: routine.id,
+    companyId: routine.companyId,
+    projectId: routine.projectId,
+    goalId: routine.goalId,
+    parentIssueId: routine.parentIssueId,
+    title: routine.title,
+    description: routine.description,
+    assigneeAgentId: routine.assigneeAgentId,
+    priority: routine.priority as RoutineRevisionSnapshotV1["routine"]["priority"],
+    status: routine.status as RoutineRevisionSnapshotV1["routine"]["status"],
+    concurrencyPolicy: routine.concurrencyPolicy as RoutineRevisionSnapshotV1["routine"]["concurrencyPolicy"],
+    catchUpPolicy: routine.catchUpPolicy as RoutineRevisionSnapshotV1["routine"]["catchUpPolicy"],
+    variables: routine.variables ?? [],
+  };
+}
+
+function routineRevisionSnapshotTrigger(trigger: RoutineTriggerRow): RoutineRevisionSnapshotV1["triggers"][number] {
+  return {
+    id: trigger.id,
+    kind: trigger.kind as RoutineRevisionSnapshotV1["triggers"][number]["kind"],
+    label: trigger.label,
+    enabled: trigger.enabled,
+    cronExpression: trigger.cronExpression,
+    timezone: trigger.timezone,
+    publicId: trigger.publicId,
+    signingMode: trigger.signingMode as RoutineRevisionSnapshotV1["triggers"][number]["signingMode"],
+    replayWindowSec: trigger.replayWindowSec,
+  };
+}
+
+async function buildRoutineRevisionSnapshot(
+  executor: Db,
+  routine: RoutineRow,
+): Promise<RoutineRevisionSnapshotV1> {
+  const triggers = await executor
+    .select()
+    .from(routineTriggers)
+    .where(and(eq(routineTriggers.companyId, routine.companyId), eq(routineTriggers.routineId, routine.id)))
+    .orderBy(asc(routineTriggers.createdAt), asc(routineTriggers.id));
+
+  return {
+    version: 1,
+    routine: routineRevisionSnapshotRoutine(routine),
+    triggers: triggers.map(routineRevisionSnapshotTrigger),
+  };
+}
+
+function canonicalSnapshot(value: RoutineRevisionSnapshotV1) {
+  return JSON.stringify(value);
+}
+
+function snapshotsMatch(left: RoutineRevisionSnapshotV1, right: RoutineRevisionSnapshotV1) {
+  return canonicalSnapshot(left) === canonicalSnapshot(right);
+}
+
+function routineCurrentFieldsMatch(left: RoutineRow, right: RoutineRow) {
+  return snapshotsMatch(
+    { version: 1, routine: routineRevisionSnapshotRoutine(left), triggers: [] },
+    { version: 1, routine: routineRevisionSnapshotRoutine(right), triggers: [] },
+  );
+}
+
+function mapRoutineRevision(row: typeof routineRevisions.$inferSelect): RoutineRevision {
+  return {
+    ...row,
+    snapshot: row.snapshot as RoutineRevisionSnapshotV1,
+  };
+}
+
 export function routineService(
   db: Db,
   deps: {
@@ -459,6 +539,52 @@ export function routineService(
       .then((rows) => rows[0] ?? null);
   }
 
+  async function appendRoutineRevision(
+    executor: Db,
+    routine: RoutineRow,
+    actor: Actor,
+    options: {
+      changeSummary?: string | null;
+      restoredFromRevisionId?: string | null;
+    } = {},
+  ) {
+    const snapshot = await buildRoutineRevisionSnapshot(executor, routine);
+    const nextRevisionNumber = routine.latestRevisionId ? routine.latestRevisionNumber + 1 : 1;
+    const now = new Date();
+    const [revision] = await executor
+      .insert(routineRevisions)
+      .values({
+        companyId: routine.companyId,
+        routineId: routine.id,
+        revisionNumber: nextRevisionNumber,
+        title: snapshot.routine.title,
+        description: snapshot.routine.description,
+        snapshot,
+        changeSummary: options.changeSummary ?? null,
+        restoredFromRevisionId: options.restoredFromRevisionId ?? null,
+        createdByAgentId: actor.agentId ?? null,
+        createdByUserId: actor.userId ?? null,
+        createdByRunId: actor.runId ?? null,
+        createdAt: now,
+      })
+      .returning();
+
+    const [updatedRoutine] = await executor
+      .update(routines)
+      .set({
+        latestRevisionId: revision.id,
+        latestRevisionNumber: nextRevisionNumber,
+        updatedAt: now,
+      })
+      .where(eq(routines.id, routine.id))
+      .returning();
+
+    return {
+      routine: updatedRoutine ?? { ...routine, latestRevisionId: revision.id, latestRevisionNumber: nextRevisionNumber, updatedAt: now },
+      revision: mapRoutineRevision(revision),
+    };
+  }
+
   async function assertRoutineAccess(companyId: string, routineId: string) {
     const routine = await getRoutineById(routineId);
     if (!routine) throw notFound("Routine not found");
@@ -1305,28 +1431,34 @@ export function routineService(
       );
       assertRoutineVariableDefinitions(variables);
       const status = normalizeDraftRoutineStatus(input.status, input.assigneeAgentId);
-      const [created] = await db
-        .insert(routines)
-        .values({
-          companyId,
-          projectId: input.projectId ?? null,
-          goalId: input.goalId ?? null,
-          parentIssueId: input.parentIssueId ?? null,
-          title: input.title,
-          description: input.description ?? null,
-          assigneeAgentId: input.assigneeAgentId ?? null,
-          priority: input.priority,
-          status,
-          concurrencyPolicy: input.concurrencyPolicy,
-          catchUpPolicy: input.catchUpPolicy,
-          variables,
-          createdByAgentId: actor.agentId ?? null,
-          createdByUserId: actor.userId ?? null,
-          updatedByAgentId: actor.agentId ?? null,
-          updatedByUserId: actor.userId ?? null,
-        })
-        .returning();
-      return created;
+      return db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        const [created] = await txDb
+          .insert(routines)
+          .values({
+            companyId,
+            projectId: input.projectId ?? null,
+            goalId: input.goalId ?? null,
+            parentIssueId: input.parentIssueId ?? null,
+            title: input.title,
+            description: input.description ?? null,
+            assigneeAgentId: input.assigneeAgentId ?? null,
+            priority: input.priority,
+            status,
+            concurrencyPolicy: input.concurrencyPolicy,
+            catchUpPolicy: input.catchUpPolicy,
+            variables,
+            createdByAgentId: actor.agentId ?? null,
+            createdByUserId: actor.userId ?? null,
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+          })
+          .returning();
+        const { routine } = await appendRoutineRevision(txDb, created, actor, {
+          changeSummary: "Created routine",
+        });
+        return routine;
+      });
     },
 
     update: async (id: string, patch: UpdateRoutine, actor: Actor): Promise<Routine | null> => {
@@ -1367,34 +1499,94 @@ export function routineService(
       if (enabledScheduleTriggers) {
         assertScheduleCompatibleVariables(nextVariables);
       }
-      const [updated] = await db
-        .update(routines)
-        .set({
+      return db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        await tx.execute(sql`select id from ${routines} where ${routines.id} = ${id} for update`);
+        const locked = await txDb
+          .select()
+          .from(routines)
+          .where(eq(routines.id, id))
+          .then((rows) => rows[0] ?? null);
+        if (!locked) return null;
+
+        if (patch.baseRevisionId && patch.baseRevisionId !== locked.latestRevisionId) {
+          throw conflict("Routine was updated by someone else", {
+            currentRevisionId: locked.latestRevisionId,
+          });
+        }
+
+        const candidate: RoutineRow = {
+          ...locked,
           projectId: nextProjectId,
-          goalId: patch.goalId === undefined ? existing.goalId : patch.goalId,
-          parentIssueId: patch.parentIssueId === undefined ? existing.parentIssueId : patch.parentIssueId,
+          goalId: patch.goalId === undefined ? locked.goalId : patch.goalId,
+          parentIssueId: patch.parentIssueId === undefined ? locked.parentIssueId : patch.parentIssueId,
           title: nextTitle,
           description: nextDescription,
           assigneeAgentId: nextAssigneeAgentId,
-          priority: patch.priority ?? existing.priority,
+          priority: patch.priority ?? locked.priority,
           status: nextStatus,
-          concurrencyPolicy: patch.concurrencyPolicy ?? existing.concurrencyPolicy,
-          catchUpPolicy: patch.catchUpPolicy ?? existing.catchUpPolicy,
+          concurrencyPolicy: patch.concurrencyPolicy ?? locked.concurrencyPolicy,
+          catchUpPolicy: patch.catchUpPolicy ?? locked.catchUpPolicy,
           variables: nextVariables,
           updatedByAgentId: actor.agentId ?? null,
           updatedByUserId: actor.userId ?? null,
-          updatedAt: new Date(),
-        })
-        .where(eq(routines.id, id))
-        .returning();
-      return updated ?? null;
+        };
+
+        if (locked.latestRevisionId && routineCurrentFieldsMatch(locked, candidate)) {
+          return locked;
+        }
+
+        const nextSnapshot = await buildRoutineRevisionSnapshot(txDb, candidate);
+        if (locked.latestRevisionId) {
+          const latestRevision = await txDb
+            .select({ snapshot: routineRevisions.snapshot })
+            .from(routineRevisions)
+            .where(
+              and(
+                eq(routineRevisions.companyId, locked.companyId),
+                eq(routineRevisions.routineId, locked.id),
+                eq(routineRevisions.id, locked.latestRevisionId),
+              ),
+            )
+            .then((rows) => rows[0] ?? null);
+          if (latestRevision && snapshotsMatch(nextSnapshot, latestRevision.snapshot as RoutineRevisionSnapshotV1)) {
+            return locked;
+          }
+        }
+
+        const [updated] = await txDb
+          .update(routines)
+          .set({
+            projectId: candidate.projectId,
+            goalId: candidate.goalId,
+            parentIssueId: candidate.parentIssueId,
+            title: candidate.title,
+            description: candidate.description,
+            assigneeAgentId: candidate.assigneeAgentId,
+            priority: candidate.priority,
+            status: candidate.status,
+            concurrencyPolicy: candidate.concurrencyPolicy,
+            catchUpPolicy: candidate.catchUpPolicy,
+            variables: candidate.variables,
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+            updatedAt: new Date(),
+          })
+          .where(eq(routines.id, id))
+          .returning();
+        if (!updated) return null;
+        const { routine } = await appendRoutineRevision(txDb, updated, actor, {
+          changeSummary: "Updated routine",
+        });
+        return routine;
+      });
     },
 
     createTrigger: async (
       routineId: string,
       input: CreateRoutineTrigger,
       actor: Actor,
-    ): Promise<{ trigger: RoutineTrigger; secretMaterial: RoutineTriggerSecretMaterial | null }> => {
+    ): Promise<{ trigger: RoutineTrigger; secretMaterial: RoutineTriggerSecretMaterial | null; revision: RoutineRevision }> => {
       const routine = await getRoutineById(routineId);
       if (!routine) throw notFound("Routine not found");
 
@@ -1422,36 +1614,50 @@ export function routineService(
         };
       }
 
-      const [trigger] = await db
-        .insert(routineTriggers)
-        .values({
-          companyId: routine.companyId,
-          routineId: routine.id,
-          kind: input.kind,
-          label: input.label ?? null,
-          enabled: input.enabled ?? true,
-          cronExpression: input.kind === "schedule" ? input.cronExpression : null,
-          timezone: input.kind === "schedule" ? (input.timezone || "UTC") : null,
-          nextRunAt,
-          publicId,
-          secretId,
-          signingMode: input.kind === "webhook" ? input.signingMode : null,
-          replayWindowSec: input.kind === "webhook" ? input.replayWindowSec : null,
-          lastRotatedAt: input.kind === "webhook" ? new Date() : null,
-          createdByAgentId: actor.agentId ?? null,
-          createdByUserId: actor.userId ?? null,
-          updatedByAgentId: actor.agentId ?? null,
-          updatedByUserId: actor.userId ?? null,
-        })
-        .returning();
+      const { trigger, revision } = await db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        await tx.execute(sql`select id from ${routines} where ${routines.id} = ${routine.id} for update`);
+        const [createdTrigger] = await txDb
+          .insert(routineTriggers)
+          .values({
+            companyId: routine.companyId,
+            routineId: routine.id,
+            kind: input.kind,
+            label: input.label ?? null,
+            enabled: input.enabled ?? true,
+            cronExpression: input.kind === "schedule" ? input.cronExpression : null,
+            timezone: input.kind === "schedule" ? (input.timezone || "UTC") : null,
+            nextRunAt,
+            publicId,
+            secretId,
+            signingMode: input.kind === "webhook" ? input.signingMode : null,
+            replayWindowSec: input.kind === "webhook" ? input.replayWindowSec : null,
+            lastRotatedAt: input.kind === "webhook" ? new Date() : null,
+            createdByAgentId: actor.agentId ?? null,
+            createdByUserId: actor.userId ?? null,
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+          })
+          .returning();
+        const latestRoutine = await txDb.select().from(routines).where(eq(routines.id, routine.id)).then((rows) => rows[0] ?? routine);
+        const appended = await appendRoutineRevision(txDb, latestRoutine, actor, {
+          changeSummary: `Created ${input.kind} trigger`,
+        });
+        return { trigger: createdTrigger, revision: appended.revision };
+      });
 
       return {
         trigger: trigger as RoutineTrigger,
         secretMaterial,
+        revision,
       };
     },
 
-    updateTrigger: async (id: string, patch: UpdateRoutineTrigger, actor: Actor): Promise<RoutineTrigger | null> => {
+    updateTrigger: async (
+      id: string,
+      patch: UpdateRoutineTrigger,
+      actor: Actor,
+    ): Promise<{ trigger: RoutineTrigger; revision: RoutineRevision } | null> => {
       const existing = await getTriggerById(id);
       if (!existing) return null;
 
@@ -1481,37 +1687,63 @@ export function routineService(
         }
       }
 
-      const [updated] = await db
-        .update(routineTriggers)
-        .set({
-          label: patch.label === undefined ? existing.label : patch.label,
-          enabled: patch.enabled ?? existing.enabled,
-          cronExpression,
-          timezone,
-          nextRunAt,
-          signingMode: patch.signingMode === undefined ? existing.signingMode : patch.signingMode,
-          replayWindowSec: patch.replayWindowSec === undefined ? existing.replayWindowSec : patch.replayWindowSec,
-          updatedByAgentId: actor.agentId ?? null,
-          updatedByUserId: actor.userId ?? null,
-          updatedAt: new Date(),
-        })
-        .where(eq(routineTriggers.id, id))
-        .returning();
-
-      return (updated as RoutineTrigger | undefined) ?? null;
+      return db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        await tx.execute(sql`select id from ${routines} where ${routines.id} = ${existing.routineId} for update`);
+        const [updated] = await txDb
+          .update(routineTriggers)
+          .set({
+            label: patch.label === undefined ? existing.label : patch.label,
+            enabled: patch.enabled ?? existing.enabled,
+            cronExpression,
+            timezone,
+            nextRunAt,
+            signingMode: patch.signingMode === undefined ? existing.signingMode : patch.signingMode,
+            replayWindowSec: patch.replayWindowSec === undefined ? existing.replayWindowSec : patch.replayWindowSec,
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+            updatedAt: new Date(),
+          })
+          .where(eq(routineTriggers.id, id))
+          .returning();
+        if (!updated) return null;
+        const routine = await txDb
+          .select()
+          .from(routines)
+          .where(eq(routines.id, existing.routineId))
+          .then((rows) => rows[0] ?? null);
+        if (!routine) throw notFound("Routine not found");
+        const appended = await appendRoutineRevision(txDb, routine, actor, {
+          changeSummary: `Updated ${existing.kind} trigger`,
+        });
+        return { trigger: updated as RoutineTrigger, revision: appended.revision };
+      });
     },
 
-    deleteTrigger: async (id: string): Promise<boolean> => {
+    deleteTrigger: async (id: string, actor: Actor = {}): Promise<{ deleted: boolean; revision: RoutineRevision | null }> => {
       const existing = await getTriggerById(id);
-      if (!existing) return false;
-      await db.delete(routineTriggers).where(eq(routineTriggers.id, id));
-      return true;
+      if (!existing) return { deleted: false, revision: null };
+      return db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        await tx.execute(sql`select id from ${routines} where ${routines.id} = ${existing.routineId} for update`);
+        await txDb.delete(routineTriggers).where(eq(routineTriggers.id, id));
+        const routine = await txDb
+          .select()
+          .from(routines)
+          .where(eq(routines.id, existing.routineId))
+          .then((rows) => rows[0] ?? null);
+        if (!routine) throw notFound("Routine not found");
+        const appended = await appendRoutineRevision(txDb, routine, actor, {
+          changeSummary: `Deleted ${existing.kind} trigger`,
+        });
+        return { deleted: true, revision: appended.revision };
+      });
     },
 
     rotateTriggerSecret: async (
       id: string,
       actor: Actor,
-    ): Promise<{ trigger: RoutineTrigger; secretMaterial: RoutineTriggerSecretMaterial }> => {
+    ): Promise<{ trigger: RoutineTrigger; secretMaterial: RoutineTriggerSecretMaterial; revision: RoutineRevision }> => {
       const existing = await getTriggerById(id);
       if (!existing) throw notFound("Routine trigger not found");
       if (existing.kind !== "webhook" || !existing.publicId || !existing.secretId) {
@@ -1520,26 +1752,211 @@ export function routineService(
 
       const secretValue = crypto.randomBytes(24).toString("hex");
       await secretsSvc.rotate(existing.secretId, { value: secretValue }, actor);
-      const [updated] = await db
-        .update(routineTriggers)
-        .set({
-          lastRotatedAt: new Date(),
-          updatedByAgentId: actor.agentId ?? null,
-          updatedByUserId: actor.userId ?? null,
-          updatedAt: new Date(),
-        })
-        .where(eq(routineTriggers.id, id))
-        .returning();
+      const { trigger, revision } = await db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        await tx.execute(sql`select id from ${routines} where ${routines.id} = ${existing.routineId} for update`);
+        const [updated] = await txDb
+          .update(routineTriggers)
+          .set({
+            lastRotatedAt: new Date(),
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+            updatedAt: new Date(),
+          })
+          .where(eq(routineTriggers.id, id))
+          .returning();
+        const routine = await txDb
+          .select()
+          .from(routines)
+          .where(eq(routines.id, existing.routineId))
+          .then((rows) => rows[0] ?? null);
+        if (!routine) throw notFound("Routine not found");
+        const appended = await appendRoutineRevision(txDb, routine, actor, {
+          changeSummary: "Rotated webhook trigger secret",
+        });
+        return { trigger: updated, revision: appended.revision };
+      });
 
       return {
-        trigger: updated as RoutineTrigger,
+        trigger: trigger as RoutineTrigger,
         secretMaterial: {
           webhookUrl: `${process.env.PAPERCLIP_API_URL}/api/routine-triggers/public/${existing.publicId}/fire`,
           webhookSecret: secretValue,
         },
+        revision,
       };
     },
 
+    listRevisions: async (routineId: string): Promise<RoutineRevision[]> => {
+      const routine = await getRoutineById(routineId);
+      if (!routine) throw notFound("Routine not found");
+      const rows = await db
+        .select()
+        .from(routineRevisions)
+        .where(and(eq(routineRevisions.companyId, routine.companyId), eq(routineRevisions.routineId, routine.id)))
+        .orderBy(desc(routineRevisions.revisionNumber), desc(routineRevisions.createdAt));
+      return rows.map(mapRoutineRevision);
+    },
+
+    restoreRevision: async (
+      routineId: string,
+      revisionId: string,
+      actor: Actor,
+    ): Promise<{
+      routine: Routine;
+      revision: RoutineRevision;
+      restoredFromRevisionId: string;
+      restoredFromRevisionNumber: number;
+      secretMaterials: RoutineTriggerSecretRestoreMaterial[];
+    }> => {
+      const existingRoutine = await getRoutineById(routineId);
+      if (!existingRoutine) throw notFound("Routine not found");
+      const targetRevision = await db
+        .select()
+        .from(routineRevisions)
+        .where(
+          and(
+            eq(routineRevisions.companyId, existingRoutine.companyId),
+            eq(routineRevisions.routineId, existingRoutine.id),
+            eq(routineRevisions.id, revisionId),
+          ),
+        )
+        .then((rows) => rows[0] ?? null);
+      if (!targetRevision) throw notFound("Routine revision not found");
+      if (existingRoutine.latestRevisionId === targetRevision.id) {
+        throw conflict("Selected revision is already the latest revision", {
+          currentRevisionId: existingRoutine.latestRevisionId,
+        });
+      }
+
+      const snapshot = targetRevision.snapshot as RoutineRevisionSnapshotV1;
+      const currentTriggers = await db
+        .select({ id: routineTriggers.id })
+        .from(routineTriggers)
+        .where(and(eq(routineTriggers.companyId, existingRoutine.companyId), eq(routineTriggers.routineId, existingRoutine.id)));
+      const currentTriggerIds = new Set(currentTriggers.map((trigger) => trigger.id));
+      const missingWebhookTriggers = snapshot.triggers
+        .filter((trigger) => trigger.kind === "webhook" && !currentTriggerIds.has(trigger.id));
+      const recreatedWebhookSecrets = new Map<string, { publicId: string; secretId: string; secretMaterial: RoutineTriggerSecretRestoreMaterial }>();
+      for (const trigger of missingWebhookTriggers) {
+        const publicId = crypto.randomBytes(12).toString("hex");
+        const created = await createWebhookSecret(existingRoutine.companyId, existingRoutine.id, actor);
+        recreatedWebhookSecrets.set(trigger.id, {
+          publicId,
+          secretId: created.secret.id,
+          secretMaterial: {
+            triggerId: trigger.id,
+            webhookUrl: `${process.env.PAPERCLIP_API_URL}/api/routine-triggers/public/${publicId}/fire`,
+            webhookSecret: created.secretValue,
+          },
+        });
+      }
+
+      return db.transaction(async (tx) => {
+        const txDb = tx as unknown as Db;
+        await tx.execute(sql`select id from ${routines} where ${routines.id} = ${existingRoutine.id} for update`);
+        const locked = await txDb
+          .select()
+          .from(routines)
+          .where(eq(routines.id, existingRoutine.id))
+          .then((rows) => rows[0] ?? null);
+        if (!locked) throw notFound("Routine not found");
+
+        const routineSnapshot = snapshot.routine;
+        const now = new Date();
+        const [restoredRoutine] = await txDb
+          .update(routines)
+          .set({
+            projectId: routineSnapshot.projectId,
+            goalId: routineSnapshot.goalId,
+            parentIssueId: routineSnapshot.parentIssueId,
+            title: routineSnapshot.title,
+            description: routineSnapshot.description,
+            assigneeAgentId: routineSnapshot.assigneeAgentId,
+            priority: routineSnapshot.priority,
+            status: routineSnapshot.status,
+            concurrencyPolicy: routineSnapshot.concurrencyPolicy,
+            catchUpPolicy: routineSnapshot.catchUpPolicy,
+            variables: routineSnapshot.variables,
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+            updatedAt: now,
+          })
+          .where(eq(routines.id, locked.id))
+          .returning();
+
+        const snapshotTriggerIds = new Set(snapshot.triggers.map((trigger) => trigger.id));
+        if (snapshotTriggerIds.size === 0) {
+          await txDb
+            .delete(routineTriggers)
+            .where(and(eq(routineTriggers.companyId, locked.companyId), eq(routineTriggers.routineId, locked.id)));
+        } else {
+          await txDb
+            .delete(routineTriggers)
+            .where(
+              and(
+                eq(routineTriggers.companyId, locked.companyId),
+                eq(routineTriggers.routineId, locked.id),
+                not(inArray(routineTriggers.id, snapshot.triggers.map((trigger) => trigger.id))),
+              ),
+            );
+        }
+
+        for (const triggerSnapshot of snapshot.triggers) {
+          const current = await txDb
+            .select()
+            .from(routineTriggers)
+            .where(and(eq(routineTriggers.companyId, locked.companyId), eq(routineTriggers.id, triggerSnapshot.id)))
+            .then((rows) => rows[0] ?? null);
+          const webhookSecret = recreatedWebhookSecrets.get(triggerSnapshot.id);
+          const restoredNextRunAt = triggerSnapshot.kind === "schedule" && triggerSnapshot.enabled
+            && triggerSnapshot.cronExpression && triggerSnapshot.timezone
+            ? nextCronTickInTimeZone(triggerSnapshot.cronExpression, triggerSnapshot.timezone, now)
+            : null;
+          const baseValues = {
+            companyId: locked.companyId,
+            routineId: locked.id,
+            kind: triggerSnapshot.kind,
+            label: triggerSnapshot.label,
+            enabled: triggerSnapshot.enabled,
+            cronExpression: triggerSnapshot.kind === "schedule" ? triggerSnapshot.cronExpression : null,
+            timezone: triggerSnapshot.kind === "schedule" ? triggerSnapshot.timezone : null,
+            publicId: triggerSnapshot.kind === "webhook" ? (current?.publicId ?? webhookSecret?.publicId ?? triggerSnapshot.publicId) : null,
+            secretId: triggerSnapshot.kind === "webhook" ? (current?.secretId ?? webhookSecret?.secretId ?? null) : null,
+            signingMode: triggerSnapshot.kind === "webhook" ? triggerSnapshot.signingMode : null,
+            replayWindowSec: triggerSnapshot.kind === "webhook" ? triggerSnapshot.replayWindowSec : null,
+            nextRunAt: restoredNextRunAt,
+            updatedByAgentId: actor.agentId ?? null,
+            updatedByUserId: actor.userId ?? null,
+            updatedAt: now,
+          };
+          if (current) {
+            await txDb.update(routineTriggers).set(baseValues).where(eq(routineTriggers.id, triggerSnapshot.id));
+          } else {
+            await txDb.insert(routineTriggers).values({
+              id: triggerSnapshot.id,
+              ...baseValues,
+              createdByAgentId: actor.agentId ?? null,
+              createdByUserId: actor.userId ?? null,
+              createdAt: now,
+            });
+          }
+        }
+
+        const appended = await appendRoutineRevision(txDb, restoredRoutine ?? locked, actor, {
+          changeSummary: `Restored from revision ${targetRevision.revisionNumber}`,
+          restoredFromRevisionId: targetRevision.id,
+        });
+        return {
+          routine: appended.routine,
+          revision: appended.revision,
+          restoredFromRevisionId: targetRevision.id,
+          restoredFromRevisionNumber: targetRevision.revisionNumber,
+          secretMaterials: [...recreatedWebhookSecrets.values()].map((entry) => entry.secretMaterial),
+        };
+      });
+    },
+
     runRoutine: async (id: string, input: RunRoutine, actor?: Actor) => {
       const routine = await getRoutineById(id);
       if (!routine) throw notFound("Routine not found");