What Friday can actually do.

Reads a UTF-8 file and returns line-numbered text. Records read state so later write, edit, delete, copy, and move operations can verify the file was seen first.

Creates or overwrites a UTF-8 file. Existing files must be read earlier in the run before they can be overwritten.

Applies an exact string replacement to a file after it has been read. Targeted and surgical — does not rewrite the whole file.

Applies a unified diff to existing workspace files after affected files have been read. Useful for multi-file changes from a single diff block.

Deletes a file after it has been read. Directory deletion requires explicit recursive=true. Root paths are guarded.

Copies one file to another path. Overwriting an existing destination requires prior read state for that destination.

Moves or renames a file. The source must be read first. Overwriting requires prior destination read state.

Inspects file bytes, size, MIME type, content preview, and hashes. Returns PNG/JPEG/GIF/WebP image content directly when practical.

Finds files by glob pattern across the workspace. Excludes common generated directories like node_modules and .git automatically.

Runs a shell command in the workspace with capped output, denied dangerous command patterns, abort support, and a configurable execution timeout.

Lists, reads logs for, or kills background processes started by exec with background=true.

Fetches an HTTP or HTTPS URL and returns readable text capped at 1 MB. Used for current docs, API references, and live data.

Opens an HTTP or HTTPS URL in the user's default browser.

Controls the managed browser: lifecycle, tabs, navigation, DOM snapshots, screenshots, and element actions. Useful for UI automation and form filling.

Schedules, lists, updates, removes, manually runs, and inspects Gateway-owned cron jobs. The correct tool for future, delayed, recurring, and reminder work.

Starts an immediate in-memory background task through the task manager. The correct tool when the user asks to run something in the background right now.