diff --git a/vault-backlog-pilot-plan.md b/vault-backlog-pilot-plan.md
index cce23e6..be401c4 100644
--- a/vault-backlog-pilot-plan.md
+++ b/vault-backlog-pilot-plan.md
@@ -1,17 +1,27 @@
 ---
-summary: Backlog decision + pilot plan (Planka CE on OVH, live 2026-07-08, phone gate passed 2026-07-09) — Dev + Clients Planka projects with per-repo/per-client boards, kanban WIP flow with human/AI column ownership, thin Ruby gem/CLI + tick, pull-based unified dashboard (digest + SessionStart brief dropped), vault demoted to knowledge layer
+summary: "HISTORICAL — Planka backlog pilot plan (live 2026-07-08, RETIRED 2026-07-16 by cc-os ADR-0042: git issues became the single tracker for state and specs). Kept as the record of the pilot design and why it was tried."
 tags:
   - scope/global
   - type/decision
   - domain/task-management
   - tool/claude-code
   - project/cc-os
-status: accepted-pilot-live
-last_reviewed: 2026-07-10
+status: superseded (ADR-0042, 2026-07-16 — Planka retired)
+last_reviewed: 2026-07-16
 ---
 
 # Backlog system: decision and pilot plan v2 (2026-07-06)
 
+> **Pilot outcome (2026-07-16):** RETIRED. After one week live, all real work flowed
+> through git issues while Planka boards held only the plugin's own build cards; the
+> wakeup automation already polled issues; the integration rested on a reverse-engineered
+> API plus an unpublished lockstep gem. cc-os **ADR-0042** (supersedes ADR-0033) made git
+> issues the single tracker for both state and specs; columns collapsed to open/closed +
+> labels with a human-only `next` label. Rework: OpenSpec change
+> `retire-planka-git-issues-only` in cc-os. Non-repo/ops work moved to the private
+> `jared/ops` Forgejo repo. The unified dashboard remains deferred until it is a felt
+> pain point. Everything below is the historical pilot design.
+
 Research behind this decision: [[backlog-system-options-research]] (including the same-day second-pass Planka deep-dive and alternatives sweep).
 
 **Supersedes the v1 vault-native plan (same day).** v1 chose vault task notes + Obsidian Bases kanban. It was overturned within hours by a requirement clarification, recorded here so the reasoning survives: