chore(aiwg): adopt shared BT6 maintainer workflow (#148)

* docs(policy): allow low-impact contributor courtesy cleanup

* chore(aiwg): migrate to shared BT6 maintainer plugin

* chore: reconcile delivery validation

.aiwg/plugins/bt6-maintainer/payload/templates/bt6-maintainer-action-items.md

@@ -0,0 +1,40 @@
+---
+name: bt6-maintainer-action-items
+description: Cross-repository BT6 maintainer action tracker for queue, issue, PR, merge, evidence, and release follow-up.
+---
+
+# BT6 Maintainer Action Items
+
+Repository: `<canonical repository>`
+Date: `<YYYY-MM-DD>`
+Source: `<queue audit | PR audit | issue stewardship | merge train>`
+
+## Open Actions
+
+| Priority | Owner | Item | Source | Dependency / Blocker | Recheck |
+| --- | --- | --- | --- | --- | --- |
+| `<P0/P1/P2/P3>` | `<owner>` | `<action>` | `<PR/issue/artifact/link>` | `<blocker or none>` | `<date/event>` |
+
+## Evidence / Research Integrity Follow-up
+
+| Artifact or Claim | Required Evidence | Owner | Status |
+| --- | --- | --- | --- |
+| `<citation/corpus/result/generated claim>` | `<source/hash/test/reproduction>` | `<owner>` | `<open/done/blocked>` |
+
+## User-facing Updates
+
+| Audience | Tracker / Channel | Purpose | Draft / Link | Mutation Authorized |
+| --- | --- | --- | --- | --- |
+| `<reporter/contributor/maintainer>` | `<issue/PR/discussion>` | `<purpose>` | `<draft>` | `<no/yes scope>` |
+
+## Completed This Session
+
+| Item | Exact Evidence |
+| --- | --- |
+| `<completed item>` | `<check/commit/SHA/URL>` |
+
+## Deferred
+
+| Item | Reason | Revisit Trigger |
+| --- | --- | --- |
+| `<item>` | `<reason>` | `<trigger>` |