Before we talk about this topic, a quick note: some time ago, the Antigravity team announced the launch of /plan mode in Ant.
Coincidentally, Claude announced it was retiring /plan mode, creating an instant sense of a generational divide. This was mocked from all sides and even produced memes, forcing people from the Antigravity team to come out and post a clarification: "We already had Plan mode in 2025."
I've been using Antigravity all along, and it did always have Plan; it was just that you had to request it proactively, and there was no /plan command. This time, the Antigravity team added the /plan command, but the move was really too slow.
Today, Google announced the launch of Skills in Gemini to replace the former Gems. The Skills feature had already existed in Spark Beta, but honestly, the web version really had all kinds of bugs and the experience was terrible; only the Mac client was a bit better.
At a point when peers are pushing Agent sandbox environments and autonomous workflows into the next generation, the snail-paced Gemini team has finally completed a historic engineering feat: users can now type a slash "/" in the input box to invoke a saved Skill. In addition to supporting linked reference files, the new feature also allows multiple skills to be combined and executed together.
For this revamp, the official side, as usual, arranged a long and grand handover ceremony. Gems for individual users will stop being supported this November, enterprise users will retain it until March 2027, and education users will be given an extension all the way to June 2027. For a transition of instruction templates, Google has solidly laid out a roadmap spanning three quarters.
Look at OpenAI next door: existing $200 subscribers continue to use 20x, and starting in November, new and old users will be unified at 10x—the transition efficiency between new and old is "blazing fast."
This update also shut down Opal, the experimental project for building mini apps, alongside Gems.
The rename department scores a win, the experimental product is buried, and the old feature is repackaged and relaunched. A few years ago, everyone was working on custom instructions, and Google made Gems. Now everyone is evolving toward lower-level execution environments, and Google has finally discovered that instructions can be made slash-invoked.