williamthorsen · williamthorsen · Jun 19, 2026 · Jun 19, 2026
diff --git a/packages/agents/src/kb-add/__tests__/write-note.test.ts b/packages/agents/src/kb-add/__tests__/write-note.test.ts
@@ -10,8 +10,8 @@ import { composeFilename, writeNote } from '../write-note.ts';
 const baseFrontmatter: Frontmatter = {
   title: 'Sample',
   recordType: 'assertion',
-  created: '2026-05-24',
-  updated: '2026-05-24',
+  created: '2026-05-24T09:14:22Z',
+  updated: '2026-05-24T13:58:12Z',
   tags: ['sample'],
   extra: {},
 };

diff --git a/...s/agents/src/kb-retrieve/__tests__/fixtures/custom-schema-vault/insight-note.md b/...s/agents/src/kb-retrieve/__tests__/fixtures/custom-schema-vault/insight-note.md
@@ -1,8 +1,8 @@
 ---
 title: A recurring insight
 recordType: insight
-created: 2026-05-01
-updated: 2026-05-01
+created: 2026-05-01T08:14:22Z
+updated: 2026-05-01T15:47:05Z
 captured-at: 2026-05-22T10:00:00.000Z
 repo: owner/repo-insight
 summary: A recurring flaky-timer insight

diff --git a/.../agents/src/kb-retrieve/__tests__/fixtures/malformed-schema-vault/plain-note.md b/.../agents/src/kb-retrieve/__tests__/fixtures/malformed-schema-vault/plain-note.md
@@ -1,8 +1,9 @@
 ---
 title: A plain assertion
 recordType: assertion
-created: 2026-05-01
-updated: 2026-05-01
+created: 2026-05-01T09:33:51Z
+updated: 2026-05-01T16:02:38Z
+# Deliberately bare to exercise the legacy YYYY-MM-DD age-parsing path of `computeAgeDays`.
 last-verified: 2026-04-20
 tags: [plain]
 ---

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/addressed-by-mixed.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/addressed-by-mixed.md
@@ -1,8 +1,8 @@
 ---
 title: A note with a mixed addressed-by list
 recordType: assertion
-created: 2026-04-01
-updated: 2026-04-01
+created: 2026-04-01T07:41:36Z
+updated: 2026-04-01T14:26:09Z
 addressed-by:
   - '#1'
   - 42

diff --git a/...ages/agents/src/kb-retrieve/__tests__/fixtures/normalize/addressed-by-scalar.md b/...ages/agents/src/kb-retrieve/__tests__/fixtures/normalize/addressed-by-scalar.md
@@ -1,8 +1,8 @@
 ---
 title: A note addressed by a single reference
 recordType: assertion
-created: 2026-04-01
-updated: 2026-04-01
+created: 2026-04-01T10:05:47Z
+updated: 2026-04-01T17:08:44Z
 addressed-by: owner/repo#7
 ---
 

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/custom-record.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/custom-record.md
@@ -3,6 +3,7 @@ title: A custom insight record
 recordType: insight
 captured-at: 2026-05-22T10:00:00.000Z
 repo: owner/repo-custom
+# Deliberately bare to exercise the legacy YYYY-MM-DD age-parsing path of `computeAgeDays`.
 last-verified: 2026-04-10
 summary: A custom insight surfaced during review
 tags: [custom]

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/cycle-a.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/cycle-a.md
@@ -2,8 +2,8 @@
 title: Cycle node A
 recordType: assertion
 diataxis: concept
-created: 2026-01-01
-updated: 2026-01-01
+created: 2026-01-01T08:49:16Z
+updated: 2026-01-01T13:12:40Z
 tags: [cycle]
 superseded-by: cycle-b.md
 ---

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/cycle-b.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/cycle-b.md
@@ -2,8 +2,8 @@
 title: Cycle node B
 recordType: assertion
 diataxis: concept
-created: 2026-01-01
-updated: 2026-01-01
+created: 2026-01-01T09:52:18Z
+updated: 2026-01-01T15:19:03Z
 tags: [cycle]
 superseded-by: cycle-a.md
 ---

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/dangling.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/dangling.md
@@ -2,8 +2,8 @@
 title: Note with a dangling successor
 recordType: assertion
 diataxis: reference
-created: 2026-01-01
-updated: 2026-01-01
+created: 2026-01-01T07:28:53Z
+updated: 2026-01-01T12:30:27Z
 tags: [orphan]
 superseded-by: does-not-exist.md
 ---

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/malformed.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/malformed.md
@@ -2,7 +2,7 @@
 title: Malformed note
 diataxis: howto
 tags: [unterminated
-created: 2026-01-01
+created: 2026-01-01T10:21:58Z
 ---
 
 A note whose frontmatter YAML cannot be parsed; it should degrade to a low-signal candidate.
diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/unparseable-date.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/normalize/unparseable-date.md
@@ -2,8 +2,8 @@
 title: Note with an unparseable last-verified
 recordType: assertion
 diataxis: reference
-created: 2026-01-01
-updated: 2026-01-01
+created: 2026-01-01T08:03:44Z
+updated: 2026-01-01T14:35:09Z
 tags: [meta]
 last-verified: not-a-date
 ---

diff --git a/...s/src/kb-retrieve/__tests__/fixtures/notes-vault/2024-archive/legacy-runbook.md b/...s/src/kb-retrieve/__tests__/fixtures/notes-vault/2024-archive/legacy-runbook.md
@@ -2,8 +2,8 @@
 title: Legacy archival runbook
 recordType: assertion
 diataxis: howto
-created: 2024-03-01
-updated: 2024-03-01
+created: 2024-03-01T09:17:05Z
+updated: 2024-03-01T15:58:33Z
 tags: [archive]
 ---
 

diff --git a/...ents/src/kb-retrieve/__tests__/fixtures/notes-vault/2026-05-01-meeting-notes.md b/...ents/src/kb-retrieve/__tests__/fixtures/notes-vault/2026-05-01-meeting-notes.md
@@ -2,8 +2,8 @@
 title: Meeting notes
 recordType: assertion
 diataxis: note
-created: 2026-05-01
-updated: 2026-05-01
+created: 2026-05-01T07:46:29Z
+updated: 2026-05-01T13:41:50Z
 tags: [meeting]
 ---
 

diff --git a/...s/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/2026-06-01/daily-log.md b/...s/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/2026-06-01/daily-log.md
@@ -2,8 +2,8 @@
 title: Daily log
 recordType: assertion
 diataxis: note
-created: 2026-06-01
-updated: 2026-06-01
+created: 2026-06-01T10:34:12Z
+updated: 2026-06-01T17:22:08Z
 tags: [journal]
 ---
 

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/mid-guide.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/mid-guide.md
@@ -2,8 +2,8 @@
 title: Interim deployment guide
 recordType: assertion
 diataxis: howto
-created: 2025-09-01
-updated: 2025-09-01
+created: 2025-09-01T08:58:37Z
+updated: 2025-09-01T14:09:24Z
 tags: [deploy]
 superseded-by: new-guide.md
 ---

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/multi-match.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/multi-match.md
@@ -2,8 +2,8 @@
 title: Multi-match snippet fixture
 recordType: assertion
 diataxis: howto
-created: 2026-03-01
-updated: 2026-03-01
+created: 2026-03-01T09:05:51Z
+updated: 2026-03-01T16:13:47Z
 tags: [test]
 ---
 

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/new-guide.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/new-guide.md
@@ -2,9 +2,10 @@
 title: Current deployment guide
 recordType: assertion
 diataxis: howto
-created: 2026-04-01
-updated: 2026-04-01
+created: 2026-04-01T07:39:18Z
+updated: 2026-04-01T12:51:36Z
 tags: [deploy, stable]
+# Deliberately bare to exercise the legacy YYYY-MM-DD age-parsing path of `computeAgeDays`.
 last-verified: 2026-04-15
 ---
 

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/old-guide.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/old-guide.md
@@ -2,8 +2,8 @@
 title: Old deployment guide
 recordType: assertion
 diataxis: howto
-created: 2025-06-01
-updated: 2025-06-01
+created: 2025-06-01T10:12:40Z
+updated: 2025-06-01T15:33:29Z
 tags: [deploy, deprecated]
 superseded-by: mid-guide.md
 ---

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/streams.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/streams.md
@@ -2,8 +2,8 @@
 title: Working with Node.js streams
 recordType: assertion
 diataxis: howto
-created: 2026-01-10
-updated: 2026-01-10
+created: 2026-01-10T08:24:09Z
+updated: 2026-01-10T14:47:55Z
 tags: [nodejs, streams]
 ---
 

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/sub/hooks.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/sub/hooks.md
@@ -2,8 +2,8 @@
 title: React hooks reference
 recordType: assertion
 diataxis: reference
-created: 2026-02-01
-updated: 2026-02-01
+created: 2026-02-01T09:41:33Z
+updated: 2026-02-01T16:28:02Z
 tags: [react, hooks]
 ---
 

diff --git a/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/unrelated.md b/packages/agents/src/kb-retrieve/__tests__/fixtures/notes-vault/unrelated.md
@@ -2,8 +2,8 @@
 title: Brewing coffee
 recordType: assertion
 diataxis: howto
-created: 2026-03-01
-updated: 2026-03-01
+created: 2026-03-01T07:53:16Z
+updated: 2026-03-01T13:24:40Z
 tags: [kitchen]
 ---
 

diff --git a/packages/factory/src/server/adapters/__tests__/status-adapter.test.ts b/packages/factory/src/server/adapters/__tests__/status-adapter.test.ts
@@ -558,7 +558,7 @@ describe('parseStatusFile', () => {
         projectRoot: '/test',
         branch: 'main',
         task: 'test',
-        startedAt: '2026-01-01',
+        startedAt: '2026-01-01T08:17:34Z',
         status: 'completed',
         // missing phases
       });

diff --git a/packages/kb/src/frontmatter/__tests__/fixtures/howto-typical.md b/packages/kb/src/frontmatter/__tests__/fixtures/howto-typical.md
@@ -1,8 +1,8 @@
 ---
 title: How to rebase onto main
 recordType: assertion
-created: 2026-05-01
-updated: 2026-05-14
+created: 2026-05-01T09:22:35Z
+updated: 2026-05-14T15:08:51Z
 tags: [git, rebase]
 ---
 

diff --git a/packages/kb/src/frontmatter/__tests__/fixtures/malformed-yaml.md b/packages/kb/src/frontmatter/__tests__/fixtures/malformed-yaml.md
@@ -2,7 +2,7 @@
 title: Broken note
 recordType: assertion
 tags: [unclosed, list
-created: 2026-05-01
+created: 2026-05-01T10:48:16Z
 ---
 
 # Note with malformed YAML frontmatter

diff --git a/packages/kb/src/frontmatter/__tests__/fixtures/unusual-whitespace.md b/packages/kb/src/frontmatter/__tests__/fixtures/unusual-whitespace.md
@@ -1,8 +1,8 @@
 ---
 title: Note with irregular spacing
 recordType: assertion
-created: 2026-05-01
-updated: 2026-05-14
+created: 2026-05-01T08:05:47Z
+updated: 2026-05-14T14:12:38Z
 tags:
   - git
   - whitespace

diff --git a/packages/kb/src/frontmatter/__tests__/fixtures/with-extra-fields.md b/packages/kb/src/frontmatter/__tests__/fixtures/with-extra-fields.md
@@ -1,11 +1,11 @@
 ---
 title: Note with optional fields
 recordType: assertion
-created: 2026-05-01
-updated: 2026-05-14
+created: 2026-05-01T07:41:09Z
+updated: 2026-05-14T16:53:24Z
 tags: [git, reference]
 type: reference
-last-verified: 2026-05-10
+last-verified: 2026-05-10T11:34:09Z
 applies-to: [git 2.45+, Bitbucket Cloud]
 sources: [https://git-scm.com/docs/git-rebase]
 ---

diff --git a/packages/kb/src/frontmatter/__tests__/frontmatter-schema.test.ts b/packages/kb/src/frontmatter/__tests__/frontmatter-schema.test.ts
@@ -5,8 +5,8 @@ import { frontmatterSchema } from '../frontmatter-schema.ts';
 const validFrontmatter = {
   title: 'A note',
   recordType: 'assertion',
-  created: '2026-05-01',
-  updated: '2026-05-14',
+  created: '2026-05-01T10:17:29Z',
+  updated: '2026-05-14T14:39:58Z',
   tags: ['git', 'rebase'],
   extra: {},
 };

diff --git a/packages/kb/src/frontmatter/__tests__/parse-note.test.ts b/packages/kb/src/frontmatter/__tests__/parse-note.test.ts
@@ -15,8 +15,8 @@ describe(parseNoteContent, () => {
     expect(note.frontmatter).toEqual({
       title: 'How to rebase onto main',
       recordType: 'assertion',
-      created: '2026-05-01',
-      updated: '2026-05-14',
+      created: '2026-05-01T09:22:35Z',
+      updated: '2026-05-14T15:08:51Z',
       tags: ['git', 'rebase'],
       extra: {},
     });
@@ -62,7 +62,7 @@ describe(parseNoteContent, () => {
 
     expect(note.frontmatter?.extra).toEqual({
       type: 'reference',
-      'last-verified': '2026-05-10',
+      'last-verified': '2026-05-10T11:34:09Z',
       'applies-to': ['git 2.45+', 'Bitbucket Cloud'],
       sources: ['https://git-scm.com/docs/git-rebase'],
     });

diff --git a/packages/kb/src/frontmatter/__tests__/round-trip.test.ts b/packages/kb/src/frontmatter/__tests__/round-trip.test.ts
@@ -50,8 +50,8 @@ describe('frontmatter round-trip idempotence', () => {
       const frontmatter: Frontmatter = {
         title: keyword,
         recordType: 'assertion',
-        created: '2026-05-01',
-        updated: '2026-05-14',
+        created: '2026-05-01T07:48:16Z',
+        updated: '2026-05-14T16:21:44Z',
         tags: [],
         extra: {},
       };
@@ -92,8 +92,8 @@ describe('frontmatter round-trip idempotence', () => {
     const frontmatter: Frontmatter = {
       title: 'a note',
       recordType: 'assertion',
-      created: '2026-05-01',
-      updated: '2026-05-14',
+      created: '2026-05-01T07:48:16Z',
+      updated: '2026-05-14T16:21:44Z',
       tags: [],
       extra: { token: literal },
     };
@@ -116,8 +116,8 @@ describe('frontmatter round-trip idempotence', () => {
     const frontmatter: Frontmatter = {
       title: 'a note',
       recordType: 'assertion',
-      created: '2026-05-01',
-      updated: '2026-05-14',
+      created: '2026-05-01T07:48:16Z',
+      updated: '2026-05-14T16:21:44Z',
       tags: [],
       extra: { note: value },
     };
@@ -137,8 +137,8 @@ describe('frontmatter round-trip idempotence', () => {
       const frontmatter: Frontmatter = {
         title: 'a note',
         recordType: 'assertion',
-        created: '2026-05-01',
-        updated: '2026-05-14',
+        created: '2026-05-01T07:48:16Z',
+        updated: '2026-05-14T16:21:44Z',
         tags: [],
         extra: { count },
       };
@@ -154,8 +154,8 @@ describe('frontmatter round-trip idempotence', () => {
     const frontmatter: Frontmatter = {
       title: 'a note',
       recordType: 'assertion',
-      created: '2026-05-01',
-      updated: '2026-05-14',
+      created: '2026-05-01T07:48:16Z',
+      updated: '2026-05-14T16:21:44Z',
       tags: [],
       extra: { flag },
     };
@@ -170,8 +170,8 @@ describe('frontmatter round-trip idempotence', () => {
     const frontmatter: Frontmatter = {
       title: 'a note',
       recordType: 'assertion',
-      created: '2026-05-01',
-      updated: '2026-05-14',
+      created: '2026-05-01T07:48:16Z',
+      updated: '2026-05-14T16:21:44Z',
       tags: [],
       extra: { maybe: null },
     };
@@ -187,8 +187,8 @@ describe('frontmatter round-trip idempotence', () => {
     const frontmatter: Frontmatter = {
       title: 'a note',
       recordType: 'assertion',
-      created: '2026-05-01',
-      updated: '2026-05-14',
+      created: '2026-05-01T07:48:16Z',
+      updated: '2026-05-14T16:21:44Z',
       tags: [],
       extra: { meta },
     };