diff --git a/conductor/tracks/T08-04/contracts.json b/conductor/archive/T08-04/contracts.json
similarity index 100%
rename from conductor/tracks/T08-04/contracts.json
rename to conductor/archive/T08-04/contracts.json
diff --git a/conductor/tracks/T08-04/design.md b/conductor/archive/T08-04/design.md
similarity index 100%
rename from conductor/tracks/T08-04/design.md
rename to conductor/archive/T08-04/design.md
diff --git a/conductor/tracks/T08-04/implementation.md b/conductor/archive/T08-04/implementation.md
similarity index 100%
rename from conductor/tracks/T08-04/implementation.md
rename to conductor/archive/T08-04/implementation.md
diff --git a/conductor/archive/T08-04/index.md b/conductor/archive/T08-04/index.md
new file mode 100644
index 00000000..969a6e26
--- /dev/null
+++ b/conductor/archive/T08-04/index.md
@@ -0,0 +1,14 @@
+# T08-04: Disposable-publication canary and compatibility matrix
+
+- [Specification](./spec.md)
+- [Requirements](./requirements.md)
+- [Design](./design.md)
+- [Implementation ledger](./implementation.md)
+- [Plan](./plan.md)
+- [Risks](./risks.md)
+- [Verification](./verification.md)
+- [Verification receipt](./verification-receipt.json)
+- [Contract](./contracts.json)
+- [Metadata](./metadata.json)
+- [GitHub issue #397](https://github.com/edithatogo/substack-cli-ts/issues/397)
+- [Implementation PR #511](https://github.com/edithatogo/substack-cli-ts/pull/511)
diff --git a/conductor/tracks/T08-04/metadata.json b/conductor/archive/T08-04/metadata.json
similarity index 92%
rename from conductor/tracks/T08-04/metadata.json
rename to conductor/archive/T08-04/metadata.json
index 673fcbb9..bcd89ae8 100644
--- a/conductor/tracks/T08-04/metadata.json
+++ b/conductor/archive/T08-04/metadata.json
@@ -3,7 +3,7 @@
   "phaseId": "P08",
   "phaseTitle": "Assurance harness, context and observability",
   "title": "Disposable-publication canary and compatibility matrix",
-  "status": "completed",
+  "status": "archived",
   "contractIds": [
     "TEST-CANARY-004"
   ],
diff --git a/conductor/tracks/T08-04/plan.md b/conductor/archive/T08-04/plan.md
similarity index 100%
rename from conductor/tracks/T08-04/plan.md
rename to conductor/archive/T08-04/plan.md
diff --git a/conductor/tracks/T08-04/requirements.md b/conductor/archive/T08-04/requirements.md
similarity index 100%
rename from conductor/tracks/T08-04/requirements.md
rename to conductor/archive/T08-04/requirements.md
diff --git a/conductor/tracks/T08-04/risks.md b/conductor/archive/T08-04/risks.md
similarity index 100%
rename from conductor/tracks/T08-04/risks.md
rename to conductor/archive/T08-04/risks.md
diff --git a/conductor/tracks/T08-04/spec.md b/conductor/archive/T08-04/spec.md
similarity index 100%
rename from conductor/tracks/T08-04/spec.md
rename to conductor/archive/T08-04/spec.md
diff --git a/conductor/archive/T08-04/verification-receipt.json b/conductor/archive/T08-04/verification-receipt.json
new file mode 100644
index 00000000..b7d28a08
--- /dev/null
+++ b/conductor/archive/T08-04/verification-receipt.json
@@ -0,0 +1,38 @@
+{
+  "track": "T08-04",
+  "status": "archived",
+  "implementationPr": 511,
+  "mergeCommit": "baf51a7772eafa9b9fffa642e15df89eb18b8fe7",
+  "mergedTo": "master",
+  "localVerification": {
+    "testsPassed": 917,
+    "productionVulnerabilities": 0,
+    "disposableCanaryTestsPassed": 4,
+    "liveCanaryTestsPassed": 5,
+    "smokeTestsPassed": 6
+  },
+  "hostedVerification": {
+    "result": "passed",
+    "workflows": [
+      "CI",
+      "Compatibility Matrix",
+      "Deploy GitHub Pages",
+      "GitHub Programme Drift",
+      "Hardening",
+      "Push on master",
+      "Release Drafter",
+      "Security"
+    ]
+  },
+  "review": {
+    "inlineComments": 0,
+    "unresolvedThreads": 0,
+    "actionableCommentsRemaining": 0
+  },
+  "ownerGatedEvidence": [
+    "Configure the disposable-substack-canary protected environment.",
+    "Supply a dedicated non-production publication, tester cookie, and reviewed lifecycle contract.",
+    "Run the manual workflow and retain a redacted cleanup receipt."
+  ],
+  "productionWriteCompatibilityClaimed": false
+}
diff --git a/conductor/tracks/T08-04/verification.md b/conductor/archive/T08-04/verification.md
similarity index 100%
rename from conductor/tracks/T08-04/verification.md
rename to conductor/archive/T08-04/verification.md
diff --git a/conductor/tracks.md b/conductor/tracks.md
index 376eb67b..6f3089f0 100644
--- a/conductor/tracks.md
+++ b/conductor/tracks.md
@@ -10,7 +10,7 @@
 ## P07 MCP v2, 2026-07-28, extensions and distributable transports
 ## P08 Assurance harness, context and observability
 - T08-03
-- [x] **Track: Disposable-publication canary and compatibility matrix** ([#397](https://github.com/edithatogo/substack-cli-ts/issues/397)) ([T08-04](./tracks/T08-04/plan.md))
+- [x] **Track: Disposable-publication canary and compatibility matrix** ([#397](https://github.com/edithatogo/substack-cli-ts/issues/397)) *Archived: [T08-04](./archive/T08-04/index.md)*
 
 ## P09 CI/CD, security, supply chain and repository governance
 - T09-01