Document OpenCode transparent sidecar mode

Author: chenbo

.agent-context/contracts/architecture.contract.json

@@ -332,7 +332,7 @@
         "docs/**"
       ],
       "imports": [],
-      "summary": "docs contains 37 files."
+      "summary": "docs contains 38 files."
     },
     {
       "name": "llm",

.agent-context/contracts/test.contract.json

@@ -109,22 +109,6 @@
       "benchmarks/fixtures/monorepo/packages/api/test/config.test.ts",
       "benchmarks/fixtures/monorepo/packages/config/test/loader.test.ts"
     ],
-    "src/cli/capp-commands.ts": [
-      "test/capp-commands.test.ts"
-    ],
-    "src/cli/default-command.ts": [
-      "test/default-command.test.ts"
-    ],
-    "src/cli/index.ts": [
-      "test/fixtures/monorepo/packages/api/src/index.ts",
-      "test/fixtures/monorepo/packages/web/src/index.ts"
-    ],
-    "src/cli/opencode-preset.ts": [
-      "test/opencode-preset.test.ts"
-    ],
-    "src/cli/task-args.ts": [
-      "test/task-args.test.ts"
-    ],
     "src/config/defaults.ts": [
       "test/config.test.ts",
       "test/scanner.test.ts",
@@ -147,6 +131,22 @@
       "benchmarks/fixtures/monorepo/packages/config/test/loader.test.ts",
       "test/fixtures/monorepo/packages/api/src/config.ts"
     ],
+    "src/cli/capp-commands.ts": [
+      "test/capp-commands.test.ts"
+    ],
+    "src/cli/default-command.ts": [
+      "test/default-command.test.ts"
+    ],
+    "src/cli/index.ts": [
+      "test/fixtures/monorepo/packages/api/src/index.ts",
+      "test/fixtures/monorepo/packages/web/src/index.ts"
+    ],
+    "src/cli/opencode-preset.ts": [
+      "test/opencode-preset.test.ts"
+    ],
+    "src/cli/task-args.ts": [
+      "test/task-args.test.ts"
+    ],
     "src/core/cache.ts": [
       "test/cache.test.ts"
     ],
@@ -324,6 +324,12 @@
       "test/orchestrator.test.ts",
       "test/task-harness.test.ts"
     ],
+    "src/harness/verification-plane/policy-engine.ts": [
+      "test/hallucination-guard.test.ts",
+      "test/policy-engine.test.ts",
+      "test/regression-guard.test.ts",
+      "test/task-harness.test.ts"
+    ],
     "src/harness/observability/execution-trace.ts": [
       "test/execution-trace.test.ts",
       "test/hallucination-guard.test.ts",
@@ -333,12 +339,6 @@
       "test/policy-engine.test.ts",
       "test/task-harness.test.ts"
     ],
-    "src/harness/verification-plane/policy-engine.ts": [
-      "test/hallucination-guard.test.ts",
-      "test/policy-engine.test.ts",
-      "test/regression-guard.test.ts",
-      "test/task-harness.test.ts"
-    ],
     "src/integrations/opencode/launcher.ts": [
       "test/opencode-launcher.test.ts",
       "test/opencode-preset.test.ts"
@@ -608,7 +608,7 @@
       "test/fixtures/monorepo/packages/web/src/index.ts",
       "test/fixtures/next-app/src/app/api/login/route.ts"
     ],
-    "benchmarks/fixtures/react-app/src/billing/audit.ts": [
+    "benchmarks/fixtures/react-app/src/components/LoginStatus.tsx": [
       "test/fixtures.test.ts",
       "test/fixtures/monorepo/package.json",
       "test/fixtures/monorepo/pnpm-workspace.yaml",
@@ -633,7 +633,7 @@
       "test/fixtures/monorepo/packages/web/src/index.ts",
       "test/fixtures/next-app/src/app/api/login/route.ts"
     ],
-    "benchmarks/fixtures/react-app/src/billing/invoice.ts": [
+    "benchmarks/fixtures/react-app/src/billing/audit.ts": [
       "test/fixtures.test.ts",
       "test/fixtures/monorepo/package.json",
       "test/fixtures/monorepo/pnpm-workspace.yaml",
@@ -658,7 +658,7 @@
       "test/fixtures/monorepo/packages/web/src/index.ts",
       "test/fixtures/next-app/src/app/api/login/route.ts"
     ],
-    "benchmarks/fixtures/react-app/src/components/LoginStatus.tsx": [
+    "benchmarks/fixtures/react-app/src/billing/invoice.ts": [
       "test/fixtures.test.ts",
       "test/fixtures/monorepo/package.json",
       "test/fixtures/monorepo/pnpm-workspace.yaml",