Mouse: Precision Editing Tools for AI Coding Agents

Haiku/Sonnet 4.5 on GitHub Copilot is not a valid comparison whatsoever.

You need to benchmark against Claude Code running Opus. I mean, being revolutionary is a big claim to fame.

```

Instead of:

    "Update the checklist to mark items 1.2, 1.4, and 1.5 as done."

    "Mark items 1.2, 1.4, and 1.5 as complete in the checklist. Only insert an x in each checkbox. Do not copy or replace any of the item descriptions."

There is not universe in which this would make agents more efficient - and who is prompting their agents like that in the first place?

I also asked glm to extract all the tools and tell me how they work roughly and nothing interesting really just slop:

```

The server exposes exactly 11 tools (verified via the xa whitelist at L16918, not the larger Eo metadata map which contains ~24 tool definitions — most are dead/legacy):

- 6 read/meta: read_first_n_lines, read_last_n_lines, read_lines, jump_to_line_n, find_in_file, get_file_metadata

- 3 edit/control: quick_edit (6 ops: insert/delete/replace/replace_range/for_lines/adjust), batch_quick_edit (atomic, always-staged, max 500 ops, multi-file), save_changes, cancel_changes

- 1 always-on: license_status

Notable design choices:

- Coordinate-based addressing (line/char/rect) instead of content-echo — saves tokens

- Staging model: edits go to an in-memory shadow, save_changes is the only disk mutation

- The rect + move "click-and-drag" columnar editor (v0.9.7) is the genuinely novel bit

- ReDoS static analyser (~700 lines) protects find_in_file ```

Eg: Check out hash-anchored editing. The first place where I recall seeing this was the oh-my-pi coding agent, but I wouldn't be surprised if the idea originated earlier/elsewhere.

I wonder whether CRDTs could be a good solution for multiple agents editing the same codebase in parallel.

> patent pending

Guess what won’t get widely adopted

Instant turn off.

Good luck with that

> insert a line, delete a range, replace a character, edit a column

The ed(1) command set 50 years old. I doubt it's patentable. These guys are far from the first to apply fine-grained text editing to LLM toolsets. I've been teaching models to do it for years. Hell, models want to use sed and awk so much that you have to hold them back.

I'm so repulsed by the idea that these guys think they can fence off a slice of the ancient commons, claim they discovered it, and charge $15/month to access it that I want nothing to do with them and will go to the mattresses to make sure they can't. Nobody owns text editing, not even when it's an AI doing it.

Mouse: sincerely, fuck you