feat(langchain_v1): Add middleware for claude text editor, claude memory, and file search #33384
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…memory, and file search Middleware Classes Text Editor Tools - StateClaudeTextEditorToolMiddleware: In-memory text editor using agent state - FilesystemClaudeTextEditorToolMiddleware: Text editor operating on real filesystem Implementing Claude's text editor tools https://docs.claude.com/en/docs/agents-and-tools/tool-use/text-editor-tool Operations: view, create, str_replace, insert Memory Tools - StateClaudeMemoryToolMiddleware: Memory persistence in agent state - FilesystemClaudeMemoryToolMiddleware: Memory persistence on filesystem Implementing Claude's memory tools https://docs.claude.com/en/docs/agents-and-tools/tool-use/memory-tool Operations: Same as text editor plus delete and rename File Search Tools - StateFileSearchMiddleware: Search state-based files - FilesystemFileSearchMiddleware: Search real filesystem Provides Glob and Grep tools with same schema as used by Claude Code (but compatible with any model) - Glob: Pattern matching (e.g., **/*.py, src/**/*.ts), sorted by modification time - Grep: Regex content search with output modes (files_with_matches, content, count) Usage ``` from langchain.agents import create_agent from langchain.agents.middleware import ( StateTextEditorToolMiddleware, StateFileSearchMiddleware, ) agent = create_agent( model=model, tools=[], middleware=[ StateTextEditorToolMiddleware(), StateFileSearchMiddleware(), ], ) ```
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Porting anthropic middleware in this PR: #33510 (without the non file system middleware which isn't related to anthropic) |
This was referenced Oct 16, 2025
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Oct 24, 2025
Implements client-side Anthropic text editor, memory, and file search tools middleware for agent workflows. Features: - StateClaudeTextEditorMiddleware and StateClaudeMemoryMiddleware for state-based file operations - FilesystemClaudeTextEditorMiddleware and FilesystemClaudeMemoryMiddleware for filesystem operations - Path validation with traversal protection and prefix enforcement - File operations: view, create, str_replace, insert, delete, rename - Comprehensive test coverage (79 tests total) Ports Python implementation langchain-ai/langchain#33384
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Middleware Classes
Text Editor Tools
Implementing Claude's text editor tools
https://docs.claude.com/en/docs/agents-and-tools/tool-use/text-editor-tool Operations: view, create, str_replace, insert
Memory Tools
Implementing Claude's memory tools
https://docs.claude.com/en/docs/agents-and-tools/tool-use/memory-tool Operations: Same as text editor plus delete and rename
File Search Tools
Provides Glob and Grep tools with same schema as used by Claude Code (but compatible with any model)
Usage