Read a file and mark it as the active file. When you switch to a different file, the previous file is automatically summarized to just its public interface, reducing context size.

Supported languages for summarization: .rs, .py, .ts, .tsx, .js, .jsx, .php, .cs, .gd

For unsupported file types, returns full contents without tracking (same as standard file read).

Get a summary of a file's public interface without changing the active file. Useful for checking APIs of files you've already worked on.

Returns:

• For the active file: full contents

• For previously read files: cached summary (public structs, functions, traits, etc.)

• For unsupported file types: full contents

Edit a file by replacing a specific string. The file becomes (or remains) the active file.

The old_string must:

• Match exactly, including whitespace and indentation

• Appear exactly once in the file (for safety)

After editing, the file's cached summary is updated.

Write content to a file, creating it if it doesn't exist. The file becomes the active file.

Creates parent directories if needed.

Show the status of all tracked files including:

• The currently active file (full contents in context)

• Cached summaries with size comparison

• Total context savings from compaction

Remove a file from tracking. Useful for cleanup or when you no longer need a file's interface in context.