docs: add OKR plugin description to marketplace README

The OKR plugin was present in plugins/ but missing from the root README listing.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -121,6 +121,26 @@ Key commands: `/linkedin:onboarding`, `/linkedin:post`, `/linkedin:quick`, `/lin
 
 ---
 
+### [OKR for Public Sector](plugins/okr/) `v1.0.0`
+
+Expert OKR guidance tailored for Norwegian public sector organizations.
+
+Based on Google/Doerr methodology, adapted for 4-month tertial cycles, government accountability requirements, and public sector governance:
+
+- **Complete OKR lifecycle** — write, quality-check, cascade, track progress, and govern OKR through 8 commands
+- **Government alignment** — translate tildelingsbrev into actionable OKR with Riksrevisjon-ready documentation
+- **CFR framework** — Conversations, Feedback, Recognition methodology adapted for public sector (no bonus-linking)
+- **Cascade visualization** — alignment from organization level (NTP, Stortingsmelding) down to team objectives
+- **Linear integration** — optional tracking with progress scoring (0.0–1.0) and check-in reports
+
+Key commands: `/okr:skriv`, `/okr:kvalitet`, `/okr:kaskade`, `/okr:sporing`, `/okr:governance`, `/okr:møter`
+
+5 specialized agents · 8 commands · 3 hooks · 15 reference docs
+
+→ [Full documentation](plugins/okr/README.md)
+
+---
+
 ## Installation
 
 ```bash