feat: add OpenCode plugin as 3rd delivery format

.github/workflows/ci.yml

@@ -21,3 +21,20 @@ jobs:
           jq -e '.plugins' .claude-plugin/marketplace.json >/dev/null
       - name: Run hook tests
         run: sh tests/run.sh
+
+  opencode-plugin:
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: .opencode-plugin
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+      - name: Install dependencies
+        run: npm ci
+      - name: Typecheck
+        run: npm run typecheck
+      - name: Run tests
+        run: npm test

.gitignore

@@ -17,3 +17,6 @@
 # effect) can still recreate it. Same local-only policy applies regardless of
 # which convention wrote it.
 .agent/
+
+# Deepwork progress files (local-only, not shared)
+.slim/deepwork/

.ignore

@@ -0,0 +1,2 @@
+!.slim/deepwork/
+!.slim/deepwork/**

.opencode-plugin/.gitignore

@@ -0,0 +1,4 @@
+node_modules/
+dist/
+*.log
+.DS_Store