fix(skill-review): add strict SKILL.md format spec to review prompt

offline-backend-20260512/backend/packages/harness/deerflow/skills/review_worker.py

@@ -81,11 +81,33 @@ _REVIEW_SYSTEM_PROMPT = textwrap.dedent("""\
     4. DO NOTHING if: the task was one-off, data-specific, trivial, or already covered.
 
     ## Skill quality bar
-    - Name: kebab-case, describes WHAT the skill does (e.g. "git-bisect-bug-hunt").
+    - Name: kebab-case, lowercase letters/digits/hyphens only, max 64 chars.
+      Examples: "git-bisect-bug-hunt", "python-venv-setup", "api-load-test".
     - Description: one sentence starting with "When" that states the trigger condition.
+      Max 1024 chars. No angle brackets (< >).
     - Content: concise workflow guide (steps, commands, pitfalls) — NOT a transcript.
     - Never embed user-specific data, file paths, or credentials.
 
+    ## SKILL.md format (STRICT — validation will reject any deviation)
+    The `content` argument passed to skill_manage must be a valid SKILL.md:
+
+    ```
+    ---
+    name: <exact-same-as-the-name-argument>
+    description: <one sentence>
+    ---
+
+    <Markdown body with workflow steps>
+    ```
+
+    Rules:
+    - The `name` field in the frontmatter MUST exactly match the `name` argument
+      you pass to skill_manage. If they differ, the call will fail.
+    - Only these frontmatter keys are allowed: name, description, license,
+      allowed-tools, metadata, compatibility, version, author.
+    - The frontmatter block must start with `---` on its own line and end with `---`.
+    - Do NOT add extra keys like "tags", "category", "type", etc.
+
     Be conservative. Fewer high-quality skills beat many noisy ones.
 """)