diff --git a/apps/electron/src/main/kernelHost.test.ts b/apps/electron/src/main/kernelHost.test.ts
index 1123e31..9ea38d4 100644
--- a/apps/electron/src/main/kernelHost.test.ts
+++ b/apps/electron/src/main/kernelHost.test.ts
@@ -1,11 +1,38 @@
 import { afterEach, beforeEach, describe, expect, it, mock } from 'bun:test';
 import { join } from 'node:path';
-import type { AgentEvent } from '@finagent/core';
+import type { AgentEvent, AutomationRule, AutomationRun } from '@finagent/core';
 
 let lastKernelOptions: Record<string, unknown> | null = null;
 let lastMarketData: FakeMarketDataService | null = null;
 let forwardedEvents: unknown[] = [];
 const routerFetchers = { getQuote: async () => ({ symbol: 'AAPL.US' }) };
+const scheduledRule: AutomationRule = {
+  id: 'scheduled-rule',
+  type: 'watchlist-daily-review',
+  enabled: true,
+  notify: 'material-only',
+  createdAt: 1,
+};
+let scheduledRules: AutomationRule[] = [];
+let recordedAutomationRuns: AutomationRun[] = [];
+const scheduledOccurrences = new Map<string, Set<string>>();
+let automationExecutions = 0;
+function automationRun(): AutomationRun {
+  return {
+    id: `run-${automationExecutions}`,
+    ruleId: 'scheduled-rule',
+    ranAt: Date.now(),
+    evaluated: 0,
+    materialChanges: 0,
+    analyzed: 0,
+    notified: false,
+    failures: [],
+  };
+}
+let runAutomationMock: () => Promise<AutomationRun> = async () => {
+  automationExecutions += 1;
+  return automationRun();
+};
 
 class FakeMarketDataService {
   quoteSymbols: string[] = [];
@@ -224,13 +251,22 @@ mock.module('@finagent/shared', () => ({
     strategyPerformance = async () => [];
   },
   AutomationRuleRepository: class {
-    list = async () => [];
+    list = async () => scheduledRules;
     save = async () => undefined;
     remove = async () => undefined;
   },
   AutomationRunRepository: class {
-    list = async () => [];
-    record = async () => undefined;
+    list = async () => recordedAutomationRuns;
+    record = async (run: AutomationRun) => {
+      recordedAutomationRuns = [run, ...recordedAutomationRuns.filter((existing) => existing.id !== run.id)];
+    };
+    claimScheduledOccurrence = async (ruleId: string, occurrence: string) => {
+      const occurrences = scheduledOccurrences.get(ruleId) ?? new Set<string>();
+      if (occurrences.has(occurrence)) return false;
+      occurrences.add(occurrence);
+      scheduledOccurrences.set(ruleId, occurrences);
+      return true;
+    };
   },
   buildBrief: () => ({
     generatedAt: 0,
@@ -238,17 +274,8 @@ mock.module('@finagent/shared', () => ({
     summary: '',
     quiet: { count: 0, message: '' },
   }),
-  runAutomation: async () => ({
-    id: 'run',
-    ruleId: 'rule',
-    ranAt: 0,
-    evaluated: 0,
-    materialChanges: 0,
-    analyzed: 0,
-    notified: false,
-    failures: [],
-  }),
-  runDue: () => [],
+  runAutomation: () => runAutomationMock(),
+  runDue: () => scheduledRules,
   DEFAULT_BRIEF_HOUR: 16.5,
   THESIS_REVIEW_DAY: 0,
   THESIS_REVIEW_HOUR: 9,
@@ -337,6 +364,14 @@ beforeEach(() => {
   lastKernelOptions = null;
   lastMarketData = null;
   forwardedEvents = [];
+  scheduledRules = [];
+  recordedAutomationRuns = [];
+  scheduledOccurrences.clear();
+  automationExecutions = 0;
+  runAutomationMock = async () => {
+    automationExecutions += 1;
+    return automationRun();
+  };
 });
 
 afterEach(() => {
@@ -457,4 +492,60 @@ describe('AgentKernelHost', () => {
     });
     host.dispose();
   });
+
+  it('does not repeat a scheduled occurrence after the host is recreated', async () => {
+    scheduledRules = [scheduledRule];
+    const firstHost = new AgentKernelHost();
+
+    await firstHost['tickAutomations']();
+    firstHost.dispose();
+
+    const recreatedHost = new AgentKernelHost();
+    await recreatedHost['tickAutomations']();
+
+    expect(automationExecutions).toBe(1);
+    expect(recordedAutomationRuns).toHaveLength(1);
+    recreatedHost.dispose();
+  });
+
+  it('claims a scheduled occurrence before execution to prevent overlap', async () => {
+    scheduledRules = [scheduledRule];
+    let resolveRun: ((run: AutomationRun) => void) | undefined;
+    let signalStarted: (() => void) | undefined;
+    const started = new Promise<void>((resolve) => {
+      signalStarted = resolve;
+    });
+    runAutomationMock = () => {
+      automationExecutions += 1;
+      signalStarted?.();
+      return new Promise((resolve) => {
+        resolveRun = resolve;
+      });
+    };
+    const host = new AgentKernelHost();
+    const firstTick = host['tickAutomations']();
+    await started;
+
+    await host['tickAutomations']();
+    expect(automationExecutions).toBe(1);
+
+    resolveRun?.(automationRun());
+    await firstTick;
+    host.dispose();
+  });
+
+  it('does not retry a failed scheduled occurrence on the next tick', async () => {
+    scheduledRules = [scheduledRule];
+    runAutomationMock = async () => {
+      automationExecutions += 1;
+      throw new Error('execution failed');
+    };
+    const host = new AgentKernelHost();
+
+    await host['tickAutomations']();
+    await host['tickAutomations']();
+
+    expect(automationExecutions).toBe(1);
+    host.dispose();
+  });
 });
diff --git a/apps/electron/src/main/kernelHost.ts b/apps/electron/src/main/kernelHost.ts
index 2b4bed1..3264c3e 100644
--- a/apps/electron/src/main/kernelHost.ts
+++ b/apps/electron/src/main/kernelHost.ts
@@ -271,7 +271,7 @@ export class AgentKernelHost {
   private readonly automationRules: AutomationRuleRepository;
   private readonly automationRuns: AutomationRunRepository;
   private automationTimer: ReturnType<typeof setInterval> | null = null;
-  private readonly lastAutomationRunByRule = new Map<string, string>();
+  private readonly claimedAutomationOccurrenceByRule = new Map<string, string>();
   private readonly thesisRepository: ThesisRepository;
   private readonly thesisService: ThesisService;
   private readonly alertRepository: AlertRuleRepository;
@@ -2332,13 +2332,14 @@ export class AgentKernelHost {
       const now = Date.now();
       const todayKey = new Date(now).toDateString();
       for (const rule of runDue(rules, now)) {
-        if (this.lastAutomationRunByRule.get(rule.id) === todayKey) continue;
+        if (this.claimedAutomationOccurrenceByRule.get(rule.id) === todayKey) continue;
+        this.claimedAutomationOccurrenceByRule.set(rule.id, todayKey);
         try {
+          if (!(await this.automationRuns.claimScheduledOccurrence(rule.id, todayKey))) continue;
           const run = await this.executeAutomation(rule);
           await this.automationRuns.record(run);
-          this.lastAutomationRunByRule.set(rule.id, todayKey);
         } catch {
-          // A failing rule never blocks the other rules.
+          // The occurrence remains claimed; retry on its next scheduled date.
         }
       }
     } catch {
diff --git a/packages/shared/src/automation/rules-repository.test.ts b/packages/shared/src/automation/rules-repository.test.ts
index 80543b0..8e7834b 100644
--- a/packages/shared/src/automation/rules-repository.test.ts
+++ b/packages/shared/src/automation/rules-repository.test.ts
@@ -100,4 +100,16 @@ describe('AutomationRunRepository', () => {
     expect((await repo.listByRule('r2')).map((r) => r.id)).toEqual(['run-2'])
     expect(await repo.listByRule('r3')).toEqual([])
   })
+
+  it('claims scheduled occurrences across repository instances', async () => {
+    const repo = new AutomationRunRepository(store)
+    expect(await repo.claimScheduledOccurrence('r1', 'Mon Jan 01 2024')).toBe(true)
+    await repo.record(run('run-1', 'r1', 1_704_067_200_000))
+    expect(await repo.claimScheduledOccurrence('r1', 'Mon Jan 01 2024')).toBe(false)
+
+    const fresh = new AutomationRunRepository(new JsonFileStore(dir))
+    expect(await fresh.claimScheduledOccurrence('r1', 'Mon Jan 01 2024')).toBe(false)
+    expect(await fresh.claimScheduledOccurrence('r1', 'Tue Jan 02 2024')).toBe(true)
+    expect(await fresh.claimScheduledOccurrence('r2', 'Mon Jan 01 2024')).toBe(true)
+  })
 })
diff --git a/packages/shared/src/automation/rules-repository.ts b/packages/shared/src/automation/rules-repository.ts
index f1a24cc..1992eb9 100644
--- a/packages/shared/src/automation/rules-repository.ts
+++ b/packages/shared/src/automation/rules-repository.ts
@@ -7,7 +7,7 @@ import type { JsonFileStore } from '../storage/json-file-store.ts'
  * research-diff / outcome repository pattern:
  *
  *   automations.json     — AutomationRule[] (five fixed rules; no cron UI)
- *   automation-runs.json — { runs: AutomationRun[] } newest first
+ *   automation-runs.json — completed runs plus claimed scheduled occurrences
  *
  * The repository is deliberately thin: seeding the five default rules is the
  * kernel host's job (first run), the UI only toggles `enabled` / runs a rule,
@@ -19,6 +19,8 @@ const RUNS_FILE = 'automation-runs.json'
 
 interface RunsFile {
   runs: AutomationRun[]
+  /** Scheduled occurrences claimed before execution, grouped by rule id. */
+  scheduledOccurrences?: Record<string, string[]>
 }
 
 export class AutomationRuleRepository {
@@ -88,7 +90,26 @@ export class AutomationRunRepository {
     const file = await this.read()
     const next = [run, ...file.runs.filter((existing) => existing.id !== run.id)]
     next.sort((a, b) => b.ranAt - a.ranAt || a.id.localeCompare(b.id))
-    await this.store.write(RUNS_FILE, { runs: next })
+    await this.store.write(RUNS_FILE, { ...file, runs: next })
+  }
+
+  /**
+   * Persistently claim one scheduled occurrence. A claim is made before the
+   * rule starts, so another scheduler tick (or a restarted host) cannot run
+   * the same occurrence again.
+   */
+  async claimScheduledOccurrence(ruleId: string, occurrence: string): Promise<boolean> {
+    const file = await this.read()
+    const occurrences = file.scheduledOccurrences?.[ruleId] ?? []
+    if (occurrences.includes(occurrence)) return false
+    await this.store.write(RUNS_FILE, {
+      ...file,
+      scheduledOccurrences: {
+        ...file.scheduledOccurrences,
+        [ruleId]: [...occurrences, occurrence],
+      },
+    })
+    return true
   }
 
   async list(): Promise<AutomationRun[]> {