fix: finalize ZIP preview freshness and parity

.trellis/spec/pipeline/native-road-package.md

@@ -1,16 +1,16 @@
-# Native Road Compiler Contract
+# Native Road Package Contract
 
 The native-road package is maintained in the private `road-compiler` repository:
 
 `https://git.app.que01.top/que01/road-compiler`
 
-This host consumes the exact git tag recorded in `package.json` and lockfile. The host owns area configuration normalization and writes `RoadCompilerInput`; the compiler owns the `native-road-package/v1` file contract and CLI. Production code must invoke the installed compiler CLI through `scripts/lib/road-compiler-cli.js`, not import compiler source files or read `packages/road-compiler`.
+The host consumes a read-only ZIP exported by the private `road-compiler` repository. The host never installs or invokes the compiler. `nativeRoadPackage` is resolved relative to the area config, hashed, validated, and extracted into `_pipeline/native-road-import/<sha256>/` before native consumers start.
 
 The completion marker is `NATIVE_ROAD_COMPILE_DONE <json>`. `build-area.js` validates the marker's count, JSON payload, area id, output path, process status, and signal before starting Blender.
 
 ## Scope / Trigger
 
-This contract applies to native-road compilation from `scripts/build-area.js`, `scripts/compile-native-roads.js`, and the road workbench fresh-compile callback.
+This contract applies to native-road consumption from `scripts/build-area.js`, diagnostics, parity, Blender, and native preview generation.
 
 ## Signatures
 

.trellis/tasks/08-26-rc-p5b-zip-import/task.json

@@ -0,0 +1,26 @@
+{
+  "id": "rc-p5b-zip-import",
+  "name": "rc-p5b-zip-import",
+  "title": "ZIP 道路包安全导入与纯消费",
+  "description": "让 osmWorkflow 配置、校验、解压并消费 road-compiler Web 导出的 ZIP 道路包，移除 compiler runtime 耦合。",
+  "status": "completed",
+  "dev_type": null,
+  "scope": null,
+  "package": null,
+  "priority": "P2",
+  "creator": "dingkang",
+  "assignee": "dingkang",
+  "createdAt": "2026-08-26",
+  "completedAt": null,
+  "branch": null,
+  "base_branch": "experiment/road-compiler-rethink",
+  "worktree_path": null,
+  "commit": null,
+  "pr_url": null,
+  "subtasks": [],
+  "children": [],
+  "parent": "08-26-rc-p5-artifact-consumption",
+  "relatedFiles": [],
+  "notes": "",
+  "meta": {}
+}