docs: add Cosmosmith resource (#172)

Co-authored-by: devnomad <[email protected]>

README.md

@@ -2520,6 +2520,15 @@ template (cowork-with-github). Install: drag-and-drop .plugin into Cowork.
   </blockquote>
 </details>
 
+<details>
+  <summary><b>Cosmosmith</b> <img src="https://badgen.net/github/stars/devnomad-byte/cosmosmith" height="14"/> - <i>Multi-agent workflow initializer with OpenCode adapters</i></summary>
+  <blockquote>
+    Generates AGENTS.md, task.md, proposal/design templates, and adapters for OpenCode, Claude Code, Cursor, Copilot, and Trae so mixed-agent projects can share one governance layer and verification ledger.
+    <br><br>
+    <a href="https://github.com/devnomad-byte/cosmosmith">🔗 <b>View Repository</b></a>
+  </blockquote>
+</details>
+
 <details>
   <summary><b>Debug Log to Text File</b> - <i>Troubleshooting guide</i></summary>
   <blockquote>

data/resources/cosmosmith.yaml

@@ -0,0 +1,18 @@
+name: Cosmosmith
+repo: https://github.com/devnomad-byte/cosmosmith
+tagline: Multi-agent workflow initializer with OpenCode adapters
+description: Generates AGENTS.md, task.md, proposal/design templates, and adapters for OpenCode, Claude Code, Cursor, Copilot, and Trae so mixed-agent projects can share one governance layer and verification ledger.
+scope:
+  - project
+tags:
+  - agents-md
+  - workflow
+  - governance
+  - adapters
+  - task-ledger
+installation: |
+  ```bash
+  npx cosmosmith@latest init --all
+  ```
+
+  The initializer creates OpenCode-compatible project guidance alongside AGENTS.md and other tool adapters.