fix(ingest): CanonicalizeLinks strips wing:/wiki/ prefix and repairs path-style links (#87)

plainLinkRE matches any [[...]] without a pipe, including path-prefixed
forms like [[wing:homelab/failures/foo]] or [[wiki/agentsquad/decisions/bar]]
that the LLM extraction step occasionally emits. Title-lookup against
titleToSlug always fails for these (they're paths, not titles), so they
were silently left broken.

Before falling to the unknown-wikilink warning, strip a known wing:/wiki/
root prefix and emit the clean wing/hall/slug path directly — matching
the brain-graph path-style link convention.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Roq1ajWKR5f1hG5Df9wC6A

ingestion/internal/pipeline/links_test.go

@@ -102,6 +102,53 @@ func TestCanonicalizeLinks_CurrentBatchPagesResolved(t *testing.T) {
 	assert.Contains(t, got[0].Content, "[[betting|Betting]]")
 }
 
+func TestCanonicalizeLinks_StripsWingColonPrefix(t *testing.T) {
+	pages := []wiki.Page{
+		{
+			Path:    "wiki/homelab/failures/act-runner-host-mode-container-needs-node-and-libatomic.md",
+			Content: "---\ntitle: 'act_runner host-mode'\n---\n\nSee [[wing:homelab/failures/rootless-buildah-act-runner-run-containers-denied]].\n",
+		},
+	}
+	got, warnings := CanonicalizeLinks(pages, map[wiki.PageType][]wiki.Entry{})
+	require.Len(t, got, 1)
+	assert.Empty(t, warnings)
+	assert.Contains(t, got[0].Content, "[[homelab/failures/rootless-buildah-act-runner-run-containers-denied]]")
+	assert.NotContains(t, got[0].Content, "wing:")
+}
+
+func TestCanonicalizeLinks_StripsWikiSlashPrefix(t *testing.T) {
+	pages := []wiki.Page{
+		{
+			Path:    "wiki/agentsquad/hypotheses/council-consolidation-standalone-deliberation-service.md",
+			Content: "---\ntitle: 'council consolidation'\n---\n\nSee [[wiki/agentsquad/decisions/autoresearch-council-sibling-pipe]].\n",
+		},
+	}
+	got, warnings := CanonicalizeLinks(pages, map[wiki.PageType][]wiki.Entry{})
+	require.Len(t, got, 1)
+	assert.Empty(t, warnings)
+	assert.Contains(t, got[0].Content, "[[agentsquad/decisions/autoresearch-council-sibling-pipe]]")
+	assert.NotContains(t, got[0].Content, "wiki/agentsquad/decisions/autoresearch-council-sibling-pipe]]\n\n") // no leftover wiki/ prefix
+	assert.NotContains(t, got[0].Content, "[[wiki/")
+}
+
+func TestCanonicalizeLinks_TitleLookupStillTakesPriorityOverPrefixStrip(t *testing.T) {
+	// A plain link that resolves via the title map must still use the
+	// normal slug|Display form, not fall through to prefix-strip repair.
+	pages := []wiki.Page{
+		{
+			Path:    "wiki/sources/shape-up.md",
+			Content: "---\ntitle: 'Shape Up'\n---\n\nSee [[Betting]].\n",
+		},
+	}
+	inventory := map[wiki.PageType][]wiki.Entry{
+		wiki.PageTypeConcept: {{Slug: "betting", Title: "Betting"}},
+	}
+	got, warnings := CanonicalizeLinks(pages, inventory)
+	require.Len(t, got, 1)
+	assert.Empty(t, warnings)
+	assert.Contains(t, got[0].Content, "[[betting|Betting]]")
+}
+
 func TestCanonicalizeLinks_MultipleLinksInOnePage(t *testing.T) {
 	pages := []wiki.Page{
 		{