Add render reference asset manifest contract

workplans/MKTT-WP-0021-render-reference-asset-manifest.md

@@ -3,10 +3,10 @@ id: MKTT-WP-0021
 type: workplan
 title: "Render Reference And Asset Manifest Contract"
 domain: markitect
-status: todo
+status: done
 owner: markitect-tool
 topic_slug: markitect
-planning_priority: P2
+planning_priority: complete
 planning_order: 155
 depends_on_workplans:
   - MKTT-WP-0010
@@ -55,11 +55,31 @@ Renderer packages own:
 `markitect-filter` owns only read-side source asset and attachment metadata
 needed by normalized Markdown inputs.
 
+## Implementation Summary
+
+Completed in `markitect-tool` as a passive render reference and asset manifest
+contract:
+
+- `RenderUnitReference`, `RenderCrossReference`, and `RenderTocEntry` model
+  renderable units, requested cross-references, and TOC planning without final
+  numbering.
+- `RenderAsset`, `RenderAssetManifest`, and `RenderAssetProvenance` model
+  static assets, copy-policy declarations, output placeholders, and source
+  adapter attachment provenance without asset copying.
+- `RenderSourceMap` and `RenderReferenceManifest` tie Markitect source spans,
+  generated function outputs, render units, assets, and artifact references
+  together under `markitect.render.reference.v1`.
+- `RenderExportRequest` can carry a passive render manifest; `render.fake`
+  echoes manifest and asset counts into result/artifact metadata without
+  invoking a renderer.
+- Docs, examples, extension catalog metadata, generated API reference, and
+  tests were added.
+
 ## P21.1 - Define render unit references
 
 ```task
 id: MKTT-WP-0021-T001
-status: todo
+status: done
 priority: high
 state_hub_task_id: "3d33d387-633e-4ffb-962e-1a5061d3db01"
 ```
@@ -79,7 +99,7 @@ Output: render reference model, serialization tests, and examples.
 
 ```task
 id: MKTT-WP-0021-T002
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "4a96e27b-9165-450c-899c-f7af484d9438"
 ```
@@ -93,7 +113,7 @@ Output: manifest model and tests that keep final numbering outside core.
 
 ```task
 id: MKTT-WP-0021-T003
-status: todo
+status: done
 priority: high
 state_hub_task_id: "ba917e45-1912-4bdb-bf3f-5946c20957b2"
 ```
@@ -114,7 +134,7 @@ Output: model, examples, and compatibility note for `MKTF-WP-0003`.
 
 ```task
 id: MKTT-WP-0021-T004
-status: todo
+status: done
 priority: high
 state_hub_task_id: "dd9f1128-af1e-44a8-961b-3aba6104ec9a"
 ```
@@ -128,7 +148,7 @@ Output: source map model, fake-renderer fixture integration, and tests.
 
 ```task
 id: MKTT-WP-0021-T005
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "1d472c44-d970-4403-9f0b-18e6192da737"
 ```