`insert-image: Not an image: nil` when running `agent-shell`

[arvidj]

What

After install through melpa with

(use-package agent-shell :ensure t)

I get

Wrote /home/arvid/.cache/agent-shell/light/Auggie-100.svg
insert-image: Not an image: nil
nil

in the *messages* buffer when I run M-x agent-shell.

The issue seems to be that I do not have SVG support installed:

(image-type-available-p 'svg) ~~> nil

Suggestion

Mention in the README that SVG support in Emacs is required. Improve error message.

Checklist

• I agree to communicate with the author myself (not AI-generated).
• I've read the README's Filing issues section.
• I'm running the latest versions (fill in below).
  • agent-shell version: agent-shell v0.50.1
  • acp.el version: 20260325.1158
  • ACP package (e.g. claude-agent-acp) version:
  • Agent CLI (e.g. claude, gemini) version:
• For requesting new agent support, I'm including a link to the ACP-capable agent or related ACP package.
• For issues, I'm including ACP traffic (as per README).