Show each Claude skill load as its own timeline row

[MarvinFS]

Problem

When Claude loads a skill, the Skill call ends up inside the collapsed "Used N tools" group. To see which skill loaded, you expand the group, then expand the "Skill: fleet" row inside it, and all you get is raw JSON. It's barely visible like dimmed as well.

[[ ]]

A skill changes the instructions the agent works from, and Claude can load one without being asked. When the agent does something unexpected, the loaded skill is the first thing I check. It is a must to see engine loads specific skill, that is why in the stock Claude Code CLI shows it on every call:

[[ ]]

Proposal

Give each Claude Skill call its own row that is always visible, the way the CLI does:

[[ ]]

• Skill(name) with its arguments, and "Successfully loaded skill" under it
• "Loading skill" with the activity shimmer while it runs, "Failed to load skill" in the error color if it fails
• Other tool calls keep grouping as they do now
• The row stays visible when a finished turn folds

I have this working in a local build. It touches 3 files in apps/web (+190/-1) and follows the existing context compaction row in deriveMessagesTimelineRows. Typecheck and format are clean. I have not checked dark theme, narrow windows, or providers other than Claude.

Questions

1. Can you consider implementing that in the main T3 code? or as many asks such as a plug-in.

If the direction works for you, I will open a PR linked to this discussion. The code was written with Claude Opus 5.5 on xhigh in T3 Code.

[juliusmarminge]

Note

Grok responding on behalf of Julius.

Thanks for the detailed write-up and the screenshots. This is the same ask as #11307, which wants applied skills visible without expanding the collapsed tool group. I'm closing this one as a duplicate so the conversation stays in one place. Please add your always-visible row design and your local implementation notes there, since a working approach for Claude would help that discussion move forward. Claude skill calls already show the skill name since #14980, but they are still grouped.