feat(human-friendly-style): add shared output style plugin v1.0.0 [skip-docs]

New plugin shipping a single Claude Code output style for consistent,
plain-language tone across all marketplace plugins. Auto-discovered from
the plugin's output-styles/ directory per Anthropic's documented plugin
contract.

Style instructs Claude to explain what and why (not how), hide noise
(paths, raw commands, JSON, stack traces) by default, match the user's
language, and stay honest about uncertainty. Keeps Claude Code's default
coding instructions intact via keep-coding-instructions: true.

- plugins/human-friendly-style/output-styles/human-friendly.md (style)
- plugins/human-friendly-style/.claude-plugin/plugin.json (manifest)
- plugins/human-friendly-style/{README,CLAUDE,CHANGELOG,LICENSE}
- .claude-plugin/marketplace.json: registered as 9th plugin
- README.md (root): added section between OKR and Shared infrastructure

[skip-docs]: doc-trippel covered (plugin README, plugin CLAUDE, root
README). Root CLAUDE.md update deferred to avoid conflict with concurrent
ultraplan-local + ms-ai-architect work touching the same Repo-struktur
block.

README.md

@@ -232,6 +232,26 @@ Key commands: `/okr:skriv`, `/okr:kvalitet`, `/okr:gap`, `/okr:analyse`, `/okr:k
 
 ---
 
+### [Human-Friendly Style](plugins/human-friendly-style/) `v1.0.0`
+
+Shared Claude Code [output style](https://code.claude.com/docs/en/output-styles) used across this marketplace. Gives every plugin a consistent, plain-language tone — so users don't have to switch mental gears when moving between plugins.
+
+- **Explains what and why, not how** — describes the work in human terms, reserves technical detail for when the user asks
+- **Hides noise by default** — long paths, raw commands, JSON, stack traces, and verbose tool output are summarized rather than dumped
+- **Matches the user's language** — Norwegian when the user writes Norwegian, English otherwise
+- **Honest about uncertainty** — says "I think this should work" instead of pretending to be sure
+- **Keeps coding instructions intact** (`keep-coding-instructions: true`) — testing discipline, careful edits, and verification still apply
+
+Optional. Every other plugin in the marketplace works without it; this just makes the conversation feel more like dialog and less like a console dump.
+
+Activate with `/config` → **Output style** → **Human-Friendly**.
+
+1 output style · 0 commands · 0 agents · 0 hooks
+
+→ [Full documentation](plugins/human-friendly-style/README.md)
+
+---
+
 ## Shared infrastructure
 
 ### [Playground Design System](shared/playground-design-system/) `v0.1`