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feat: add tool-level file cache with LRU eviction and mtime invalidation

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Introduces FileCache (OrderedDict LRU, st_mtime_ns validation) to avoid
redundant disk reads and duplicate content in conversation context.
Read tools return a short "[Cached]" message on cache hit instead of
resending unchanged file content, saving tokens. Write/edit/delete tools
invalidate affected paths; str_replace pre-warms the cache after edits.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Phillip Tarrant
2026-03-11 22:26:51 -05:00
parent 2c532adbbc
commit d829e6553c
8 changed files with 623 additions and 10 deletions
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15
app/tools/registry.py
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@@ -8,6 +8,7 @@ from typing import TYPE_CHECKING, Any
from app.models.config import AppConfig
from app.tools.base import BaseTool
from app.utils.file_cache import FileCache
if TYPE_CHECKING:
from app.services.skills import SkillsManager
@@ -89,6 +90,7 @@ def create_default_registry(
config: AppConfig,
skills_manager: SkillsManager | None = None,
skill_runner: object | None = None,
file_cache: FileCache | None = None,
) -> ToolRegistry:
"""Create a ToolRegistry populated with all built-in tools.
@@ -97,6 +99,7 @@ def create_default_registry(
config: Application configuration.
skills_manager: Optional skills manager for skill tools.
skill_runner: Optional SkillRunner for package skill activation.
file_cache: Optional file cache shared across file-reading tools.
"""
# Read tools
from app.tools.filesystem import ListDirTool, ReadFileTool, ReadManyFilesTool
@@ -119,8 +122,8 @@ def create_default_registry(
registry = ToolRegistry()
# Read
registry.register(ReadFileTool(workspace_root, config))
registry.register(ReadManyFilesTool(workspace_root, config))
registry.register(ReadFileTool(workspace_root, config, file_cache=file_cache))
registry.register(ReadManyFilesTool(workspace_root, config, file_cache=file_cache))
registry.register(ListDirTool(workspace_root, config))
# Search
@@ -128,13 +131,13 @@ def create_default_registry(
registry.register(FindFilesTool(workspace_root, config))
# Write
registry.register(WriteFileTool(workspace_root, config))
registry.register(WriteFileTool(workspace_root, config, file_cache=file_cache))
registry.register(MakeDirTool(workspace_root, config))
registry.register(DeleteFileTool(workspace_root, config))
registry.register(DeleteFileTool(workspace_root, config, file_cache=file_cache))
# Edit
registry.register(StrReplaceTool(workspace_root, config))
registry.register(PatchApplyTool(workspace_root, config))
registry.register(StrReplaceTool(workspace_root, config, file_cache=file_cache))
registry.register(PatchApplyTool(workspace_root, config, file_cache=file_cache))
# Shell
registry.register(RunCommandTool(workspace_root, config))