diff --git a/docs/superpowers/plans/2026-08-23-workflow-run-watcher-clock-independent-test.md b/docs/superpowers/plans/2026-08-23-workflow-run-watcher-clock-independent-test.md
new file mode 100644
index 00000000..894aa6fb
--- /dev/null
+++ b/docs/superpowers/plans/2026-08-23-workflow-run-watcher-clock-independent-test.md
@@ -0,0 +1,69 @@
+# Workflow Run Watcher Clock-Independent Test Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Prevent `workflow-run-watcher.test.ts` from expiring as wall-clock time advances.
+
+**Architecture:** Keep production code unchanged. Anchor every synthetic workflow timestamp to one captured current
+time while preserving the fixture's existing event offsets, then verify the recent-summary assertion against the
+real watcher.
+
+**Tech Stack:** TypeScript, Vitest, Node.js
+
+---
+
+### Task 1: Make the completed-run fixture relative to test time
+
+**Files:**
+
+- Modify: `test/workflow-run-watcher.test.ts:17-100`
+
+- [x] **Step 1: Confirm the fixed fixture fails after its recent window expires**
+
+Run:
+
+```bash
+npm test -- test/workflow-run-watcher.test.ts
+```
+
+Expected: FAIL in `getRecentRunSummaries omits agents[] (lightweight snapshot)` because `summaries` is empty.
+
+- [x] **Step 2: Anchor the fixture to the current test time**
+
+At the start of `sampleRunJson()`, capture a start time fifteen minutes before the call:
+
+```typescript
+const startTime = Date.now() - 15 * 60_000;
+```
+
+Replace the fixed ISO timestamp with `new Date(startTime).toISOString()`, replace the fixed `startTime` property
+with the variable, and express each workflow agent's `startedAt`, `queuedAt`, and `lastProgressAt` as its existing
+millisecond offset from `startTime`.
+
+- [x] **Step 3: Verify the focused test passes**
+
+Run:
+
+```bash
+npm test -- test/workflow-run-watcher.test.ts
+```
+
+Expected: 19 tests pass with no failures.
+
+- [x] **Step 4: Verify formatting and the CI gate**
+
+Run:
+
+```bash
+npx prettier --check test/workflow-run-watcher.test.ts
+npm run test:ci
+```
+
+Expected: formatting passes and the CI unit/integration suite has no failures.
+
+- [x] **Step 5: Commit the correction**
+
+```bash
+git add test/workflow-run-watcher.test.ts docs/superpowers/plans/2026-08-23-workflow-run-watcher-clock-independent-test.md
+git commit -m "test(workflows): keep recent-run fixture clock-independent"
+```
diff --git a/test/workflow-run-watcher.test.ts b/test/workflow-run-watcher.test.ts
index 73fa042b..965a418e 100644
--- a/test/workflow-run-watcher.test.ts
+++ b/test/workflow-run-watcher.test.ts
@@ -19,9 +19,11 @@ const RUN_ID = 'wf_test1234-abc';
 
 /** A run JSON shaped like a real (killed) run: all three agent states + the bloat fields. */
 function sampleRunJson() {
+  const startTime = Date.now() - 15 * 60_000;
+
   return {
     runId: RUN_ID,
-    timestamp: '2026-06-15T00:00:00.000Z',
+    timestamp: new Date(startTime).toISOString(),
     taskId: 'task_abc',
     // --- bloat fields that MUST be stripped ---
     script: 'export const meta = {};\n'.repeat(5000), // ~110KB
@@ -35,7 +37,7 @@ function sampleRunJson() {
     workflowName: 'review-open-prs',
     status: 'killed',
     error: 'user stopped the task',
-    startTime: 1781466999000,
+    startTime,
     defaultModel: 'claude-opus-4-8[1m]',
     totalTokens: 109703,
     totalToolCalls: 44,
@@ -55,13 +57,13 @@ function sampleRunJson() {
         agentId: 'a6c0e282c3f5ac0bf',
         model: 'claude-opus-4-8[1m]',
         state: 'done',
-        startedAt: 1781467000002,
-        queuedAt: 1781466999962,
+        startedAt: startTime + 1002,
+        queuedAt: startTime + 962,
         attempt: 1,
         lastToolName: 'StructuredOutput',
         lastToolSummary: 'Does the profile setting make the allowlist dead config',
         promptPreview: 'You are reviewing a pull request...',
-        lastProgressAt: 1781467524143,
+        lastProgressAt: startTime + 525143,
         tokens: 104703,
         toolCalls: 41,
         durationMs: 524140,
@@ -76,12 +78,12 @@ function sampleRunJson() {
         agentId: 'a1234567890abcdef',
         model: 'claude-opus-4-8[1m]',
         state: 'progress',
-        startedAt: 1781467010000,
-        queuedAt: 1781466999970,
+        startedAt: startTime + 11000,
+        queuedAt: startTime + 970,
         attempt: 1,
         lastToolName: 'Read',
         promptPreview: 'Review PR 127...',
-        lastProgressAt: 1781467600000,
+        lastProgressAt: startTime + 601000,
         tokens: 5000,
         toolCalls: 3,
       },
@@ -93,9 +95,9 @@ function sampleRunJson() {
         phaseTitle: 'Verify',
         model: 'claude-opus-4-8[1m]',
         state: 'start',
-        queuedAt: 1781466999980,
+        queuedAt: startTime + 980,
         promptPreview: 'Verify finding x...',
-        lastProgressAt: 1781466999980,
+        lastProgressAt: startTime + 980,
       },
     ],
   };