fix(recall): stop teamai-recall subagent from recursing in cursor (#553)

The recall rule body instructs the AI to "invoke the teamai-recall
subagent". In tools like Cursor that leak always-apply rules into
subagent sessions, the teamai-recall subagent itself reads this and
spawns another teamai-recall subagent, looping until it hangs.

Add a bilingual self-exemption block at the top of both the rule body
(builtin-rules.ts) and the CLAUDE.md-injected block (pull.ts): if you
ARE the teamai-recall subagent, the rule does not apply — proceed
directly to the search instead of invoking recall again.

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/builtin-rules.ts

@@ -122,6 +122,10 @@ export async function deployBuiltinRules(
 
 const TEAMAI_RECALL_RULE_CONTENT = `# Team Knowledge Recall (teamai)
 
+> **Self-exemption (must read first):** If you ARE the \`teamai-recall\` subagent yourself, this rule does NOT apply to you — do not invoke \`teamai-recall\` (or any recall) again. Proceed directly to performing the knowledge search that is your task. This prevents infinite subagent recursion in tools (e.g. Cursor) whose always-apply rules leak into subagent sessions.
+>
+> **自豁免（务必先读）：** 如果你自己就是 \`teamai-recall\` subagent，本规则对你不适用——不要再调用 \`teamai-recall\`（或任何 recall），直接执行你本职的知识检索任务。此举防止在（如 Cursor 等）会把 always-apply 规则泄漏进 subagent 会话的工具中发生无限递归。
+
 ## 规则：任务开始前检索团队知识库（推荐）
 
 **Before** starting a task that involves code changes, debugging,

src/pull.ts

@@ -1332,6 +1332,10 @@ export function compileRecallRulesBlock(): string {
         '',
         '## Team Knowledge Recall (teamai)',
         '',
+        '> **Self-exemption (must read first):** If you ARE the `teamai-recall` subagent yourself, this rule does NOT apply to you — do not invoke `teamai-recall` (or any recall) again. Proceed directly to performing the knowledge search that is your task. This prevents infinite subagent recursion in tools (e.g. Cursor) whose always-apply rules leak into subagent sessions.',
+        '>',
+        '> **自豁免（务必先读）：** 如果你自己就是 `teamai-recall` subagent，本规则对你不适用——不要再调用 `teamai-recall`（或任何 recall），直接执行你本职的知识检索任务。此举防止在（如 Cursor 等）会把 always-apply 规则泄漏进 subagent 会话的工具中发生无限递归。',
+        '',
         '**Before** starting a task that involves code changes, debugging,',
         'or design decisions, you **SHOULD** invoke the `teamai-recall`',
         'subagent via the Agent tool with a concise natural-language',