diff --git a/.ciagent/CHECKPOINT.json b/.ciagent/CHECKPOINT.json
index d597301..daf9212 100644
--- a/.ciagent/CHECKPOINT.json
+++ b/.ciagent/CHECKPOINT.json
@@ -1,20 +1,18 @@
 {
-  "phase": 4,
+  "phase": 5,
   "stage": "complete",
   "milestone": "v1.28",
   "phase_role": "execution",
   "attempts": 0,
-  "updated_at": "2026-08-19T23:15:00Z",
+  "updated_at": "2026-08-19T23:45:00Z",
   "project": "acdl",
   "projects": ["acdl", "nova-blockchain-exchange"],
   "active_milestone": "v1.28",
   "milestone_branch": "milestone/v1.28-cli-identity",
-  "phase_branch": "phase/04-token-vend-pat",
+  "phase_branch": "phase/05-docs-integration",
   "tag_line": "v1.27.x",
-  "phase_name": "token-vend-pat",
-  "reqs_covered": ["REQ-336", "REQ-337", "REQ-338", "REQ-339", "REQ-340", "REQ-341", "REQ-342", "REQ-343", "REQ-344"],
-  "caps_verified": ["CAP-037", "CAP-038"],
-  "tests": {"p4_specific": 54, "total_passing": 998, "failures": 0},
-  "grill_conditions_resolved": ["C-6.1/C-7.1 ABAC fail-closed", "C-5.1 requested_claims shape", "C-7.3 cred file no raw PAT", "C-8.2 kj pinned", "C-2.1 P5 folded into P4 W8"],
-  "notes": "v1.28 P4 SHIP. token-vend-pat complete (highest-risk, double-length, 8 waves). Tag v1.27.4. 9 REQs covered (REQ-336..344 + REQ-340/341 folded), CAP-037 + CAP-038 verified. ABAC fail-closed (7 tests), KMS ES256 DER->raw, JWKS, PAT lifecycle, nova auth, nova idp setup. 54 P4 tests + 998 total. Next: P5 docs-integration."
+  "phase_name": "docs-integration",
+  "reqs_covered": ["REQ-345", "REQ-346", "REQ-347", "REQ-348", "REQ-349", "REQ-350", "REQ-351"],
+  "tests": {"p5_specific": 17, "total_passing": 1000, "failures": 0},
+  "notes": "v1.28 P5 SHIP. docs-integration complete. Tag v1.27.5. 7 REQs covered (REQ-345..351). Operator guide (C-6.3), developer guide (C-7.3), threat model (C-6.2, C-9.2 INV audit), E2E test (REQ-348). 1000 tests passing. Next: P6 final-review-ship (milestone release)."
 }
\ No newline at end of file