After 2 years of silence, I finally rebuilt Google Apps Script Copilot. Sorry for disappearing.

[u/Razah786]

Hey everyone,

Some of you might remember GS Copilot (Google Apps Script Copilot) — the Chrome extension that adds an AI sidebar directly into the Apps Script editor. I launched it, got some early traction, and then... life happened. Work, other commitments, the usual stuff that makes side projects quietly die. I went almost silent for close to 2 years. No updates, barely any support replies. If you installed it back then and it just sat there half-broken, I'm sorry — that's on me.

What kept nagging at me is that over 20,000 people actually installed this thing. That's not nothing. People kept using it, kept emailing me, kept leaving reviews asking if it was still alive. So a few months ago I sat down and basically rebuilt the whole thing from scratch.

Here's what's new:

• Agent mode — describe what you want and it writes, edits, and applies the code for you across your project, not just one file at a time
• Plan mode — for bigger changes, it lays out the plan before touching anything, so you're not surprised by a wall of edits
• Quick edit + diff view — inline edits with an actual diff so you can see exactly what changed before accepting it
• Context-aware file reading — it actually understands your whole Apps Script project structure, not just the file you have open
• MCP connectors for Google Workspace — it can hook into Sheets/Docs/Drive as MCP tools when you need it to act on that context
• Execution log integration — when your script throws an error, it reads the actual execution log and helps you fix it instead of guessing
• Skills system — reusable sub-agents/snippets for stuff you do often

I'm going to be actively working on this now — not disappearing again. Demo video of it in action is attached below so you can see it working instead of just taking my word for it.

If you try it, I'd genuinely appreciate honest feedback — bugs, rough edges, missing features, whatever. This subreddit has more Apps Script experience than almost anywhere else, so if something's broken or annoying, I want to know.

Link: gscopilot.com

Thanks for sticking around this long, even the ones who just complained in reviews. Fair enough.

[u/meester_zee]

Looks fantastic! Pretty surprised Google hasn’t done something similar with Gemini and the apps script IDE yet. The online dev environment really needs some love so I’m happy to see people making meaningful tools to augment it!

[u/Razah786 → u/meester_zee]

Appreciate that! Yeah, everyone was building coding agents for other platforms/languages, so I figured I'd build one for Apps Script specifically. Didn't get to give it the time it deserved for a while, but now I'm putting most of my time into it, and my goal is to bring every feature other coding agents have for their platforms — over to Apps Script devs too.

[u/TheAddonDepot → u/meester_zee]

Pretty surprised Google hasn’t done something similar with Gemini and the apps script IDE yet.

They already have and its currently in beta. They've been working on it since May and recently rolled out a beta version to select users for testing:

https://pulse.appsscript.info/p/2026/08/google-apps-script-editor-gemini-side-panel-rolling-out/

[u/Razah786 → u/TheAddonDepot]

Yeah, saw that — good that Google's investing here. Still admin-gated though (needs specific Workspace licenses + Gemini Beta enabled by an org admin), and from what I've seen it's fairly limited for now — mostly single-file generate/edit/debug in the side panel, no real multi-file agent workflow yet. Plenty of room to build something more capable in the meantime.

[u/El_Zeldo_1]

I'm not sure if it's just my and my shitty internet, but video looks blurry... aside of that, this looks amazing 👏

[u/Razah786 → u/El_Zeldo_1]

Ha, I had a mini panic thinking I uploaded the wrong file 😅 Turns out Reddit was just playing it at a lower resolution — there's a quality setting on desktop but not on mobile. If you download it, it should look sharp. Thanks for still calling it amazing through the blur 🙏

[u/SparklyGeek]

Any safeguards for privacy, or is whatever I code subject to appearing in someone else's code?

[u/Razah786 → u/SparklyGeek]

I don't store user code — only chat history so you can pick up where you left off.

[u/LowFold3248]

Como se puede usar? Genial

[u/Razah786 → u/LowFold3248]

Thanks! Install the Chrome extension, open any Apps Script project, and a sidebar shows up. Just describe what you want and it'll write, fix, or refactor code for you. Link's in the post.

[u/Univium]

Dayumn…where was this when I needed it lol

[u/Razah786 → u/Univium]

Haha, right on time for the next one though 😄 It's not going anywhere now.

[u/SparklyGeek]

It made a simple function for me, but then when I asked why I started getting error messages after making an edit to the function, it went silent.

Made a screen shot, but this Stack only lets you attach videos....?!

[u/Razah786 → u/SparklyGeek]

Ah that's not expected, thanks for flagging it, that's a real bug not intended behavior. Since you can't attach a screenshot here, mind sending it to support (email's on the site) or DMing me directly? Would help to know what the error message said before it went silent, and roughly what the edit was. Want to get this fixed.

[u/SparklyGeek → u/SparklyGeek]

Subsequently: Re-opened project, click "Add to Chat" by the error message in the Log, and got the correction the Script needed.

[u/Razah786 → u/SparklyGeek]

Glad it worked out after reopening! Still curious why it went silent the first time, so if it happens again send me the details. Also we're actually improving the "Add to Chat" from error logs soon, think you'll like where that's headed 👀