diff --git a/docs/pr-discussions/PR-5129-backlog-b-0806-iter-7-p2-ansible-gitops-crossplane-compositi.md b/docs/pr-discussions/PR-5129-backlog-b-0806-iter-7-p2-ansible-gitops-crossplane-compositi.md
new file mode 100644
index 0000000000..2aab93a946
--- /dev/null
+++ b/docs/pr-discussions/PR-5129-backlog-b-0806-iter-7-p2-ansible-gitops-crossplane-compositi.md
@@ -0,0 +1,58 @@
+---
+pr_number: 5129
+title: "backlog(B-0806 iter-7 P2): Ansible+GitOps + Crossplane composition \u2014 cross-OS declarative management for Windows + Macs"
+author: "AceHack"
+state: "MERGED"
+created_at: "2026-05-26T08:19:23Z"
+merged_at: "2026-05-26T08:23:11Z"
+closed_at: "2026-05-26T08:23:11Z"
+head_ref: "otto-cli/b0806-ansible-gitops-crossplane-cross-os-2026-05-26"
+base_ref: "main"
+archived_at: "2026-05-26T12:41:57Z"
+archive_tool: "tools/pr-preservation/archive-pr.ts"
+---
+
+# PR #5129: backlog(B-0806 iter-7 P2): Ansible+GitOps + Crossplane composition — cross-OS declarative management for Windows + Macs
+
+## PR description
+
+## Summary
+
+Iter-7 capstone capturing the maintainer's 2026-05-26 substrate-engineering pull:
+- *"This is good for declarative oses other than nix like id love to have it setup my windows machines and macs. ansible gitops"*
+- *"it's like cross plane too kinda"*
+
+## End-state architecture (4-reconciler shape)
+
+```
+git (single source of truth)
+├── k8s/applications/    → ArgoCD pulls → applies to K8s            (exists)
+├── nixos/flake.nix      → autoUpgrade pulls → nixos-rebuild switch (B-0801)
+├── ansible/playbooks/   → ansible-pull cron pulls → applies to OS  (NEW — iter-7)
+└── crossplane/          → Crossplane controller pulls → external APIs (NEW — iter-7)
+```
+
+Each substrate class has one reconciler; all share git as source of truth. Composes with `.claude/rules/m-acc-multi-oracle-end-user-moral-invariants.md` at substrate-class scope.
+
+## Key recommendations captured
+
+- **Pattern 3 (ansible-pull)** for OS substrate — rejects Pattern 1 Operator (K8s host required + network reachability concern) + Pattern 2 Webhook AAP (commercial cost). Pull-from-host matches NixOS autoUpgrade analog.
+- **Crossplane** for cluster-external infra — extends existing ArgoCD substrate rather than adding a second control plane.
+
+## 6 design questions for the maintainer (sub-target-blocking)
+
+Pull cadence, branch model, secret handling, ansible-bootstrap, state observability, conflict handling — all documented in the row body as substrate-engineering decisions to land before iter-7 sub-target work begins.
+
+## Composes with
+
+- B-0794 (iter-5.4 homelab gh-auth — enables host→git auth for the pull side)
+- B-0800–B-0805 (iter-6 cluster-update arc)
+- B-0805 capstone (dep-pin discipline applies to ansible collections + Crossplane providers too)
+
+🤖 Generated with [Claude Code](https://claude.com/claude-code)
+
+## General comments
+
+### @chatgpt-codex-connector (2026-05-26T08:19:29Z)
+
+You have reached your Codex usage limits for code reviews. You can see your limits in the [Codex usage dashboard](https://chatgpt.com/codex/cloud/settings/usage).