fix: wiki-ingest and wiki-manage call xref add with --rel, not --rel-a/--rel-b (#174)

Files changed:
- CHANGES.md
- VERSION
- instructions/wiki-ingest/SKILL.md
- instructions/wiki-manage/SKILL.md

CHANGES.md

@@ -59,7 +59,7 @@ concern - readable here, never shipped as something to parse.
 
 ---
 
-## 8.0.0-beta.38 - 2026-10-04 - kb/CONTRACT.md names unwritten scaffold sections and the Unfilled Template Sections finding
+## 8.0.0-beta.39 - 2026-10-04 - wiki-ingest and wiki-manage call xref add with --rel, not the --rel-a/--rel-b removed in 4.0.0
 
 **Author:** Torben Nehmer
 
@@ -149,8 +149,19 @@ concern - readable here, never shipped as something to parse.
 - Page-material passages in type-spec.md, type-guidance.md and language-boundaries.md name subtype templates
 - kb/CONTRACT.md names section anchors in wikilinks and the Broken Anchors finding
 - kb/CONTRACT.md names unwritten scaffold sections and the Unfilled Template Sections finding
+- wiki-ingest and wiki-manage call xref add with --rel, not the --rel-a/--rel-b removed in 4.0.0
 <!-- /wikitool:bumps -->
 
+### wiki-ingest and wiki-manage call xref add with --rel, not the --rel-a/--rel-b removed in 4.0.0
+
+Since 4.0.0 `xref add` declares one directed edge and takes a single `--rel`, but the
+cross-reference step of both skills still showed the mirrored form with `--rel-a`/`--rel-b`, so
+every session that followed it failed with `No such option` and had to recover the syntax from
+`-h`. Both now show `xref add --a --b --rel` with the reading `[A] <label> [B]` as a comment, and
+point at `kb/CONTRACT.md` § Linking for direction and reverse edges instead of restating the rule.
+A scan of every documented `wikitool` call against the command tree found no other stale flag.
+Found during an ingest in an instance on 7.0.0 (Gitea #174).
+
 ### kb/CONTRACT.md names unwritten scaffold sections and the Unfilled Template Sections finding
 
 The stage contract pairs each page property with the `lint` finding that checks it, and its