diff --git a/CHANGELOG.md b/CHANGELOG.md
index e0531b8..d54294d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,31 @@
 # Changelog
 
+## 0.21.6 — 2026-05-26
+
+### Phase 4f orcahand migration + dedup (final Tier-2 migration)
+
+The last Tier-2 migration. `orcahand` consolidated to broomva/skills Tier-2 monorepo (broomva/skills PR #9 merge `df4fb13`), resolving the Phase-0 contested dedup case.
+
+`broomva/orcahand` and `broomva/orcahand-skill` were true duplicates (both 180K, identical SKILL.md + assets/ + references/ + schemas/ + scripts/, both `name: orcahand`). Per user decision: migrate the canonical (`.agents`-symlinked) `broomva/orcahand` → `skills/orcahand/`; archive BOTH source repos with redirect-stubs.
+
+### Source repos deprecated (both, 6mo window until 2026-11-26)
+
+- broomva/orcahand PR #1 (merge `4e637ed`)
+- broomva/orcahand-skill PR #1 (merge `f753966`)
+
+### Files changed
+
+- `references/companion-skills.yaml` — 1 NEW entry (orcahand); 63 → 64 total
+- `VERSION` — `0.21.5` → `0.21.6`
+- `CHANGELOG.md` — this entry
+
+### Migration complete
+
+**47 skills now in broomva/skills monorepo.** All Tier-2 candidates from the inventory doc are migrated, except `broomva/mirage` (no remote on GitHub — flagged as an anomaly, not actionable). The skills-monorepo migration arc (Phases 2–4f) is complete.
+
+---
+
+
 ## 0.21.5 — 2026-05-26
 
 ### Phase 4e neuroscience migration (TRIBE v2 family)
diff --git a/VERSION b/VERSION
index e756a90..78cfa5e 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.21.5
+0.21.6
diff --git a/references/companion-skills.yaml b/references/companion-skills.yaml
index 83ebbfa..df77097 100644
--- a/references/companion-skills.yaml
+++ b/references/companion-skills.yaml
@@ -155,6 +155,15 @@ skills:
     min_bstack_version: 0.21.0
     description: "CaP-X LLM-driven robot manipulation via code generation — CaP-Gym (187 tasks), CaP-Bench, CaP-Agent0, CaP-RL, sim-to-real"
 
+  - name: orcahand
+    repo: broomva/skills
+    skillPath: skills/orcahand/SKILL.md
+    category: platform
+    required: false
+    introduced_in: 0.21.6
+    min_bstack_version: 0.21.0
+    description: "Full-stack ORCA Hand skill — 17-DOF tendon-driven robotic hand: plant interface, safety shields, MuJoCo sim, RL training, teleoperation, sim-to-real, EGRI (Phase 4f; deduplicated broomva/orcahand + broomva/orcahand-skill — both archived)"
+
   - name: openrocket-sim
     repo: broomva/skills
     skillPath: skills/openrocket-sim/SKILL.md