docs(milestone): complete v1.27 PO State Catalog & Ciagent Compression (release v1.26.3)

v1.27 COMPLETE. NFR milestone — PO State Catalog & Ciagent Compression.

Phases:
- P0 pre-execution (specify→clarify→research→plan→grill) → v1.26.0
- P1 author-archive (STATE.md + 8 files archived) → v1.26.1
- P2 fix-stale-wire (PROJECT/ROADMAP phase-status + ship-discipline wiring) → v1.26.2
- P3 final-review-ship (review + audit + milestone ship) → v1.26.3

Delivered:
- .ciagent/STATE.md — PO-facing capability catalog (32 CAP rows +
  11 invariants across 10 domains, backfilled through v1.26). The
  first file the PO reads before writing a new REQ-NNN spec.
- .ciagent/ compression: 7 platform-root files + 1 consumer file
  archived (lossless git mv). Active .md count: 15 (was 25).
- PROJECT.md + ROADMAP.md v1.26 phase-status corrected (P3/P4/P5
  → complete; v1.25.5 shipped; merged to main).
- STATE.md wired into the P-final ship discipline (PLAN.md, ROADMAP.md,
  NORTH_STAR.md). Every future milestone ship appends capability rows +
  bumps the 'Last milestone ship' header.

Review: 0 P0 issues. Audit: reconstruction PASS, file discipline CLEAN,
branch hygiene CLEAN, commit discipline CLEAN (13/13 ---ci--- blocks).
NFR purity gate holds (zero feat: commits).

---ci---
project: acdl
phase: 3
milestone: v1.27
status: complete
---ci---

.ciagent/CHECKPOINT.json

@@ -1,17 +1,19 @@
 {
-  "phase": 2,
+  "phase": 3,
   "stage": "complete",
   "milestone": "v1.27",
-  "phase_role": "execution",
+  "phase_role": "final",
   "attempts": 0,
-  "updated_at": "2026-08-19T05:15:00Z",
+  "updated_at": "2026-08-19T05:30:00Z",
   "project": "acdl",
   "projects": ["acdl", "nova-blockchain-exchange"],
   "active_milestone": "v1.27",
   "milestone_branch": "milestone/v1.27-po-state-catalog",
-  "phase_branch": "phase/02-fix-stale-wire",
+  "phase_branch": "phase/03-final-review-ship",
   "tag_line": "v1.26.x",
-  "current_phase": {"phase": 2, "tag": "v1.26.2", "status": "complete"},
-  "previous_phase": {"phase": 1, "tag": "v1.26.1", "status": "complete"},
-  "notes": "v1.27 P2 complete. PROJECT.md + ROADMAP.md phase-status fixed (P3/P4/P5 complete, v1.25.5 shipped). STATE.md wired into PLAN.md + NORTH_STAR.md + ROADMAP.md P5 ship-update lists. archive/README.md updated with 8 archived files. 0 active dangling references. Next: P3 final-review-ship."
+  "current_phase": {"phase": 3, "tag": "v1.26.3", "status": "complete"},
+  "previous_phase": {"phase": 2, "tag": "v1.26.2", "status": "complete"},
+  "milestone_complete": true,
+  "milestone_release": {"tag": "v1.26.3", "type": "nfr"},
+  "notes": "v1.27 COMPLETE. NFR milestone (PO State Catalog & Ciagent Compression). 3 phases. STATE.md authored (32 CAPs, 11 invariants, 10 domains). 8 files archived (7 platform + 1 consumer). PROJECT.md + ROADMAP.md v1.26 phase-status fixed. STATE.md wired into P-final ship discipline. Review: 0 P0. Audit: reconstruction PASS, file discipline CLEAN, branch hygiene CLEAN, commit discipline CLEAN (13/13 ---ci--- blocks). Next run starts a new milestone."
 }

.ciagent/ROADMAP.md

@@ -81,6 +81,19 @@
   before building the new env). New `core/env_transition.py` module.
   15 requirements (REQ-276..290), 4 phases.
 
+- **v1.27:** complete (tag `v1.26.3`) — PO State Catalog & Ciagent
+  Compression. NFR milestone. Authored `.ciagent/STATE.md` (PO-facing
+  capability catalog, 32 CAP rows + 11 invariants across 10 domains,
+  backfilled through v1.26). Archived 7 platform-root files + 1
+  consumer file to `.ciagent/archive/` (CAPABILITY_INVENTORY,
+  REVIEW-AUDIT-P05, VERIFY-P03, VERIFY-P04, P4-PILOT-RUN-EVIDENCE,
+  AUTONOMY_THESIS, COST + nova-blockchain-exchange/ROADMAP). Fixed
+  PROJECT.md + ROADMAP.md v1.26 phase-status (P3/P4/P5 → complete).
+  Wired STATE.md into the P-final ship discipline (PLAN.md, ROADMAP.md,
+  NORTH_STAR.md). Active `.ciagent/` root: 15 .md (was 25) + 1 json + 1
+  checkpoint. 3 phases (P0 pre-execution + P1 author-archive + P2
+  fix-stale-wire + P3 final-review-ship). No REQ-NNN (NFR).
+
 > **Full v1.0–v1.24 phase detail, wave ordering, success criteria, and
 > decision cross-references:** `.ciagent/archive/ROADMAP-v1.0-v1.24.md`.
 

.ciagent/STATE.md

@@ -11,8 +11,10 @@
 > *why*, read `NORTH_STAR.md`. For *how*, read `ARCHITECTURE.md`. For
 > *what was decided*, read `PROJECT.md` load-bearing decisions.
 >
-> **Last milestone ship:** v1.26 (`v1.25.5`, 2026-08-19).
-> **Next update:** at v1.27 ship.
+> **Last milestone ship:** v1.27 (`v1.26.3`, 2026-08-19) — PO State Catalog
+> & Ciagent Compression NFR milestone. No new capabilities this
+> milestone (NFR); v1.27 authored this file + compressed `.ciagent/`.
+> **Next update:** at v1.28 ship.
 
 ## How to use this file (PO)