chore: 升级 Trellis 并精简规则（09-05-trellis-upgrade-rule-cleanup）

.agents/skills/trellis-meta/references/local-architecture/task-system.md

@@ -59,7 +59,7 @@ Use child tasks for deliverables that can move through planning, implementation,
 Create new children with:
 
 ```bash
-python3 ./.trellis/scripts/task.py create "<child title>" --slug <child-slug> --parent <parent-dir>
+python3 ./.trellis/scripts/task.py create "<child title>" --description "<one-line summary>" --slug <child-slug> --parent <parent-dir>
 ```
 
 Link or unlink existing tasks with:
@@ -101,12 +101,12 @@ Rules:
 - Include spec and research files.
 - Do not include code files that are about to be modified.
 - Do not treat temporary conclusions in chat as the only context.
-- Seed rows have no `file` field; they only prompt the AI to fill in real entries.
+- Rows without a `file` field are skipped by readers. Legacy `{"_example": ...}` placeholder rows are rejected by `task.py validate` — delete them.
 
 ## Common Commands
 
 ```bash
-python3 ./.trellis/scripts/task.py create "<title>" --slug <slug>
+python3 ./.trellis/scripts/task.py create "<title>" --description "<one-line summary>" --slug <slug>
 python3 ./.trellis/scripts/task.py start <task>
 python3 ./.trellis/scripts/task.py current --source
 python3 ./.trellis/scripts/task.py add-context <task> implement <file> <reason>