ROADMAP: current facts, no issue numbers to go stale

Fixes the broken re-verify sentence and moves it to Done, says the Unreal
stack exists, describes both feeds correctly, updates the thin categories,
and points at labels and the re-verify batch instead of issue numbers.

Closes #145

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: TMHSDigital

ROADMAP.md

@@ -5,30 +5,37 @@ missing entry, so freshness and accuracy come before volume.
 
 ## Open to contributors
 
-- **Thin categories:** video, animation and environment are still the smallest (counts in the
-  [category table](catalog/README.md)). See [CONTRIBUTING.md](CONTRIBUTING.md) and the "new
-  source" issue form.
-- **Optional fields:** `camera_perspective` and `grid_dimensions` on 2D entries
-  ([#41](https://github.com/TMHSDigital/Free-Game-Dev-Assets/issues/41)). Small, well-scoped, a
-  good first PR.
-- **Starter stacks:** audio, a game-jam kit, Unity, Unreal and VR are not covered yet. Use the
-  "request an asset" form to add to a stack's Gaps list.
+- **Thin categories:** video is the smallest, then animation and shaders-vfx, then environment
+  (counts in the [category table](catalog/README.md)). See [CONTRIBUTING.md](CONTRIBUTING.md)
+  and the "new source" issue form.
+- **Re-verify batch:** each month a [re-verify issue](https://github.com/TMHSDigital/Free-Game-Dev-Assets/issues?q=is%3Aissue+is%3Aopen+%22Re-verify+batch%22+in%3Atitle)
+  lists the entries whose licence was read longest ago. Re-read one source, add a dated
+  Evidence line, and open a pull request.
+- **Starter stacks:** audio, a game-jam kit, Unity and VR are not covered yet (Unreal is, in
+  [stacks/3d-third-person-unreal.md](stacks/3d-third-person-unreal.md)). Use the "request an
+  asset" form to add to a stack's Gaps list.
 - **Corrections:** a licence that changed or a link that moved. The weekly link check opens an
   issue listing them.
+- **Small tasks:** issues labelled [`good first issue`](https://github.com/TMHSDigital/Free-Game-Dev-Assets/labels/good%20first%20issue)
+  and [`gap`](https://github.com/TMHSDigital/Free-Game-Dev-Assets/labels/gap).
 
 ## Planned
 
-- Re-verification in smaller, regular batches, so the July 2026 verifications do not all expire. Since 2026-10 the `reverify.yml` workflow opens a monthly checklist issue of the entries checked longest ago (over 150 days, about a tenth of the catalog each month)
-  together in mid-2027.
 - A changelog page generated from [docs/review-ledger.md](docs/review-ledger.md).
 - Full-text search over entry bodies (Notes and Evidence), not only names, tags and summaries.
+- The guides rendered as site pages, and an engine filter on the site (see the
+  [`feature`](https://github.com/TMHSDigital/Free-Game-Dev-Assets/labels/feature) label).
 
 ## Done
 
 - Site search across names, tags and summaries, with licence, format and category filters.
 - Accessibility fixes: focus handling, contrast, heading outline and tap targets (Lighthouse
   accessibility 100).
 - Thin categories topped up: 15 video, animation and environment sources (2026-10-04).
-
-- Machine-readable exports: `data.json`, `catalog.csv` and an Atom feed (`feed.xml`) of recently
-  verified entries.
+- Machine-readable exports: `data.json`, `catalog.csv`, an Atom feed of new sources
+  (`feed.xml`) and one of re-verified licences (`reverified.xml`); see [docs/data.md](docs/data.md).
+- Monthly dataset releases tagged `vYYYY.MM.DD`, with the version written into `CITATION.cff`.
+- Re-verification in regular batches: since 2026-10 the `reverify.yml` workflow opens a
+  monthly checklist of the entries checked longest ago (over 150 days, about a tenth of the
+  catalog each month), so the July 2026 verifications do not all expire together in mid-2027.
+- `camera_perspective` and `grid_dimensions` on 2D entries.