story-kit: create 348_story_mcp_tools_for_code_search_grep_and_glob

.story_kit/work/1_backlog/348_story_mcp_tools_for_code_search_grep_and_glob.md

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+---
+name: "MCP tools for code search (grep and glob)"
+---
+
+# Story 348: MCP tools for code search (grep and glob)
+
+## User Story
+
+As a non-Claude agent connected via MCP, I want search tools so that I can find files and search code contents in my worktree.
+
+## Acceptance Criteria
+
+- [ ] grep tool — searches file contents with regex support, returns matching lines with context
+- [ ] glob tool — finds files by pattern (e.g. '**/*.rs')
+- [ ] Both scoped to the agent's worktree
+- [ ] grep supports output modes: content (matching lines), files_with_matches (just paths), count
+- [ ] grep supports context lines (-A, -B, -C)
+- [ ] Results limited to prevent overwhelming the LLM context
+
+## Out of Scope
+
+- TBD