Backend that reads and writes files directly from the filesystem.
Files are accessed using their actual filesystem paths. Relative paths are resolved relative to the current working directory. Content is read/written as plain text, and metadata (timestamps) are derived from filesystem stats.
class FilesystemBackendEnable virtual path mode for filesystem operations. When true, treats rootDir as a virtual root filesystem. Does NOT restrict shell commands.
Download multiple files from the sandbox. Implementations must support partial success.
Edit a file by replacing string occurrences.
Uses downloadFiles() to read, performs string replacement in TypeScript, then uploadFiles() to write back. No runtime needed on the sandbox host.
Structured glob matching returning FileInfo objects.
Uses pure POSIX shell (find + stat) via execute() to list all files, then applies glob-to-regex matching in TypeScript. No Python or Node.js needed on the sandbox host.
Glob patterns are matched against paths relative to the search base:
* matches any characters except /** matches any characters including / (recursive)? matches a single character except /[...] character classesSearch for a literal text pattern in files using grep.
List files and directories in the specified directory (non-recursive).
Uses pure POSIX shell (find + stat) via execute() — works on any Linux including Alpine. No Python or Node.js needed.
Read file content with line numbers.
Uses pure POSIX shell (awk) via execute() — only the requested slice is returned over the wire, making this efficient for large files. Works on any Linux including Alpine (no Python or Node.js needed).
Read file content as raw FileData.
Uses downloadFiles() directly — no runtime needed on the sandbox host.
Upload multiple files to the sandbox. Implementations must support partial success.
Create a new file with content.
Uses downloadFiles() to check existence and uploadFiles() to write. No runtime needed on the sandbox host.