Merge remote-tracking branch 'origin/main' into planning

# Conflicts:
#	CHANGELOG.md
#	content/_meta/README.md
#	content/_meta/npc-authoring-style-guide.md
#	wiki/_templates/cultural-group.md
#	wiki/_templates/institution.md
#	wiki/_templates/star-system.md
#	wiki/characters/devra.md
#	wiki/characters/drin.md
#	wiki/characters/harek.md
#	wiki/characters/lera-sessik.md
#	wiki/characters/maret-korr.md
#	wiki/characters/naia-tamm.md
#	wiki/characters/nils-davan.md
#	wiki/characters/pell.md
#	wiki/characters/renn.md
#	wiki/characters/resha.md
#	wiki/characters/sabel.md
#	wiki/characters/sera-venn.md
#	wiki/characters/torek-lintar.md
#	wiki/characters/voss.md
#	wiki/star-systems/krenn/index.md

docs/briefings/si.md

@@ -1,3 +1,12 @@
+---
+title: "Si - Project Briefing"
+description: "Sprint and project manager — owns sprint planning, ticket tracking, v0.2 critical path dependency chain, and CI pipeline awareness for definition of done"
+type: briefing
+status: active
+agent: Si
+updated: 2026-03-13
+---
+
 # Si - Project Briefing
 Last updated: 2026-03-13