diff --git a/.planning/ROADMAP.md b/.planning/ROADMAP.md
index 0d0094d..32b3bae 100644
--- a/.planning/ROADMAP.md
+++ b/.planning/ROADMAP.md
@@ -419,7 +419,7 @@ summarizes classification, blast radius, and recommended/approved remediation st
   4. `GET /api/phishing/campaigns` lists campaigns and `GET /api/phishing/campaigns/{id}` returns full detail (linked reports, messages, indicators, classification history)
   5. Every `/api/phishing/*` route introduced in this phase calls `requireAuth()` (or `requirePermission()`) and rejects an unauthenticated/unauthorized request with 401/403 — establishing the auth convention every later phishing endpoint (Phases 19-21) must also follow
 **Plans**: 3 plans (2 waves)
-- [ ] 18-01-PLAN.md — Campaign grouping service (tiered match + transactional find-or-create) + tests + phishing permission resource (CAMP-01, CAMP-02, ACCESS-01)
+- [x] 18-01-PLAN.md — Campaign grouping service (tiered match + transactional find-or-create) + tests + phishing permission resource (CAMP-01, CAMP-02, ACCESS-01)
 - [ ] 18-02-PLAN.md — POST /api/phishing/tickets/{id}/analyze + wire groupReportIntoCampaign into webhook + cron sweep automatic paths (DETECT-03, CAMP-01, CAMP-02, ACCESS-01)
 - [ ] 18-03-PLAN.md — GET /api/phishing/campaigns list + GET /api/phishing/campaigns/{id} nested detail (CAMP-03, ACCESS-01)
 **UI hint**: no
@@ -487,7 +487,7 @@ Phases execute in numeric order. v1.0 (Phases 1-9.1) shipped 2026-07-10. v2.0 (P
 | 15. Data Model, Detection & Ticket Evidence | v3.0 | 3/3 | Complete    | 2026-07-15 |
 | 16. EML/MIME Evidence Parser | v3.0 | 3/3 | Complete   | 2026-07-15 |
 | 17. Mimecast Blast Radius Lookup | v3.0 | 1/1 | Complete   | 2026-07-15 |
-| 18. Campaign Grouping & Phishing Analysis API | v3.0 | 0/TBD | Not started | - |
+| 18. Campaign Grouping & Phishing Analysis API | v3.0 | 1/3 | In Progress|  |
 | 19. Classification Engine | v3.0 | 0/TBD | Not started | - |
 | 20. Remediation, Approval & Audit Safety | v3.0 | 0/TBD | Not started | - |
 | 21. Autotask Triage Note | v3.0 | 0/TBD | Not started | - |
diff --git a/.planning/STATE.md b/.planning/STATE.md
index c73068e..8d10a8e 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -2,10 +2,10 @@
 gsd_state_version: 1.0
 milestone: v3.0
 milestone_name: Phishing Triage Automation
-status: completed
+status: executing
 stopped_at: Phase 18 planned, 3 plans ready
-last_updated: "2026-07-15T20:51:02.723Z"
-last_activity: 2026-07-15 -- Phase 17 marked complete
+last_updated: "2026-07-15T23:14:09.528Z"
+last_activity: 2026-07-15 -- Phase 18 execution started
 progress:
   total_phases: 7
   completed_phases: 3
@@ -21,14 +21,14 @@ progress:
 See: .planning/PROJECT.md (updated 2026-07-14)
 
 **Core value:** A manager/security operator can see every phishing/spam report ticket automatically triaged, deduplicated into campaigns, and classified — with any destructive remediation gated behind explicit human approval.
-**Current focus:** Phase 17 — mimecast-blast-radius-lookup
+**Current focus:** Phase 18 — campaign-grouping-phishing-analysis-api
 
 ## Current Position
 
-Phase: 17 — COMPLETE
-Plan: 1 of 1
-Status: Phase 17 complete
-Last activity: 2026-07-15 -- Phase 17 marked complete
+Phase: 18 (campaign-grouping-phishing-analysis-api) — EXECUTING
+Plan: 1 of 3
+Status: Executing Phase 18
+Last activity: 2026-07-15 -- Phase 18 execution started
 
 Progress: [░░░░░░░░░░] 0%