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Python: [BREAKING] Align FileAccess tools with .NET — directory discovery and recursive search #6476

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Python: [BREAKING] Align FileAccess tools with .NET — directory discovery and recursive search #6476

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4c10490
Align FileAccess tools with .Net; add directory discovery and recursi…
westey-m Jun 11, 2026
e18bc5a
Fix choices field description: spacing, line length, grammar
westey-m Jun 11, 2026
9a4081c
Address PR comments
westey-m Jun 11, 2026
9673c26
Merge branch 'main' into python-file-access-align
westey-m Jun 12, 2026
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4 changes: 2 additions & 2 deletions python/packages/core/AGENTS.md
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Expand Up @@ -94,11 +94,11 @@ agent_framework/

### File Access Harness (`_harness/_file_access.py`)

- **`AgentFileStore`** - Abstract async store backing the file-access harness. Implementations expose `write_file`, `read_file`, `delete_file`, `list_files`, `file_exists`, `search_files`, and `create_directory` over forward-slash relative paths.
- **`AgentFileStore`** - Abstract async store backing the file-access harness. Implementations expose `write_file`, `read_file`, `delete_file`, `list_files`, `list_directories`, `file_exists`, `search_files`, and `create_directory` over forward-slash relative paths. `list_files`/`list_directories` return only direct children; `search_files` accepts a keyword-only `recursive` flag (default `False`) and, when `recursive=True`, walks all descendants and returns `file_name` values relative to the search directory.
- **`InMemoryAgentFileStore`** - Dict-backed store suitable for tests and lightweight scenarios.
- **`FileSystemAgentFileStore`** - Disk-backed store rooted under a configurable directory. Enforces relative-path normalization, root containment, and rejects symlink/reparse-point segments to prevent escape.
- **`FileSearchResult`** / **`FileSearchMatch`** - `SerializationMixin` DTOs returned by `search_files`, carrying the matching file name, a context snippet, and the matching lines with 1-based line numbers.
- **`FileAccessProvider`** - `ContextProvider` that adds shared file-access tools (`file_access_save_file`, `file_access_read_file`, `file_access_delete_file`, `file_access_list_files`, `file_access_search_files`) plus default usage instructions to each invocation. Unlike `MemoryContextProvider`, the store is intentionally shared across sessions and agents.
- **`FileAccessProvider`** - `ContextProvider` that adds shared file-access tools (`file_access_save_file`, `file_access_read_file`, `file_access_delete_file`, `file_access_list_files`, `file_access_list_subdirectories`, `file_access_search_files`) plus default usage instructions to each invocation. `file_access_list_files`/`file_access_list_subdirectories` enumerate direct children (files / subdirectories) so the agent can walk the tree level by level; `file_access_search_files` searches recursively from the store root and returns store-root-relative `file_name` paths, scoped via an `fnmatch` glob (where `*` crosses `/`, e.g. `*.md`, `reports/*`). Unlike `MemoryContextProvider`, the store is intentionally shared across sessions and agents.

### Tool Approval Harness (`_harness/_tool_approval.py`)

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