feat(anthropic): add more anthropic middleware

[eyurtsev]

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

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

StateTextEditorToolMiddleware, StateFileSearchMiddleware, )

agent = create_agent( model=model, tools=[], middleware=[
StateTextEditorToolMiddleware(), StateFileSearchMiddleware(), ], ) ```

[codspeed-hq]

CodSpeed Performance Report

Merging #33510 will not alter performance

_{Comparing eugene/anthropic-middleware-more (2381e02) with master (5489df7)¹}

Summary

✅ 3 untouched
⏩ 31 skipped²

Footnotes

1. No successful run was found on master (90b6805) during the generation of this report, so 5489df7 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 31 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[eyurtsev]

This PR is porting the middleware implementations here: #33384 into the langchain_anthropic package with the exception of the file system middleware which is doesn't dependent on anthropic

[eyurtsev]

Depends on this PR: #33512