Merge remote-tracking branch 'origin/main' into main

AGENTS.md 冲突（两侧都改了 Linear→Plane 记录源）：取本地更完整的表述
（self-hosted plane.chans.xyz + mcp__plane__* + 2026-09-03 停用日期 +
issue-tracker.md 已过时），并吸收远端的 `plane-workflow` skill 指引。

AGENTS.md

@@ -31,11 +31,12 @@ This repo is the **agent ops handbook + fact source** for maintaining personal V
 
 7. Record each material VPS operation, incident, configuration change, or
    verification outcome in the corresponding **Plane `vps` project**
-   (self-hosted `plane.chans.xyz`, Plane MCP `mcp__plane__*`). **Linear is
-   retired as a record source (2026-09-03) — do not create Linear issues;**
-   existing W1N-* entries are read-only history. Include scope, action,
-   verification, and remaining follow-up; never put passwords, tokens, private
-   keys, recovery keys, or private room IDs in Plane or Linear.
+   (self-hosted `plane.chans.xyz`, Plane MCP `mcp__plane__*`, following the
+   `plane-workflow` skill). **Linear is retired as a record source (2026-09-03)
+   — do not create Linear issues;** existing W1N-* entries are read-only
+   history. Include scope, action, verification, and remaining follow-up; never
+   put passwords, tokens, private keys, recovery keys, or private room IDs in
+   Plane or Linear.
 
 ### Runbook execution rules
 
@@ -100,6 +101,7 @@ not maintain a second copy of the machine table here.
 | Plane health | [runbooks/plane-health.md](runbooks/plane-health.md) |
 | RustDesk health (hk2) | [runbooks/rustdesk-health.md](runbooks/rustdesk-health.md) |
 | AdGuard Home health | [runbooks/adguard-home-health.md](runbooks/adguard-home-health.md) |
+| Host disk cleanup | [runbooks/host-disk-cleanup.md](runbooks/host-disk-cleanup.md) |
 | Home Assistant maintenance | [runbooks/home-assistant-maintenance.md](runbooks/home-assistant-maintenance.md) + [scripts/ha-maintenance.sh](runbooks/scripts/ha-maintenance.sh) |
 | matrix_e2ee update (hass.windy.lan) | [runbooks/matrix-e2ee-update.md](runbooks/matrix-e2ee-update.md) |
 | Matrix upstream refs | [docs/matrix-upstream.md](docs/matrix-upstream.md) |
@@ -124,10 +126,11 @@ Routine mailcow health: `cd ansible && ansible-playbook playbooks/health-report.
 ### Issue tracker
 
 Issues are tracked in **Plane** — self-hosted at `plane.chans.xyz`, project
-`vps` — and created/updated via the Plane MCP (`mcp__plane__*`). **Linear is
-retired as a record source (2026-09-03); do not create Linear issues.** Existing
-W1N-* entries are read-only history. `docs/agents/issue-tracker.md` documents
-the retired Linear workflow and is stale; treat this section as authoritative.
+`vps` — and created/updated via the Plane MCP (`mcp__plane__*`), following the
+`plane-workflow` skill. **Linear is retired as a record source (2026-09-03); do
+not create Linear issues.** Existing W1N-* entries are read-only history.
+`docs/agents/issue-tracker.md` documents the retired Linear workflow and is
+stale; treat this section as authoritative.
 
 ### Triage labels