feat(prompt): 搜索引导改为意图→工具的正向指引，multi_grep 按上游保持关闭

真实会话中模型仍用 bash grep -o | sort -u 做抽取，被拒后直接放弃核对；
原提示词只说"不要"，没告诉它抽取/计数、给程序传文件清单、过滤命令输出时该用什么。

- routing：按已知信息选 grep/find（多变体用 grep 正则 alternation），
  codemode + tools.grep 做聚合，bash 文件清单用 git ls-files，
  overflow_query 过滤输出，被拒后改用替代方案继续
- 权限策略：rg/grep/git grep/find/fd 的 deny 附带指向替代工具的 reason
- tools.jsonc：grep/find 新 snippet，补上 codegraph_explore snippet
- FFF 上游标注 multi_grep 有害：wrapper 删除 PI_FFF_MULTIGREP，清理全部引用
- JSONC 测试改用字符串感知的注释剥离（reason 中含 'src/**/*.ts'）

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

tests/bundle-config.test.ts

@@ -16,7 +16,10 @@ import {
 import { CONFIG_PATH as RTK_CONFIG_PATH } from "../pi-rtk-optimizer/src/constants.ts";
 import { CONFIG_PATH as COMPACTION_CONFIG_PATH } from "../pi-compaction/src/config.ts";
 import { WORKTREE_CONFIG_PATH } from "../pi-worktree/src/settings.ts";
-import { resolvePreamblePath } from "../extensions/system-prompt-config.ts";
+import {
+  resolvePreamblePath,
+  stripJsoncComments,
+} from "../extensions/system-prompt-config.ts";
 
 const repositoryRoot = resolve(dirname(fileURLToPath(import.meta.url)), "..");
 const bundleConfigDir = join(repositoryRoot, "config");
@@ -48,9 +51,9 @@ const BUNDLE_CONFIG_FILES = [
   "p10k.zsh",
 ];
 
-/** Strip JSONC comments (line and block) — same approach as the seed test. */
+/** Strip JSONC comments (line and block) without touching string literals. */
 function stripJsonc(raw: string): string {
-  return raw.replace(/^\s*\/\/.*$/gm, "").replace(/\/\*[\s\S]*?\*\//g, "");
+  return stripJsoncComments(raw);
 }
 
 test("every bundle config file exists and is non-empty", async () => {