[BUG]

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Bug: image input kills the session — glm-5.3:cloud via Ollama

Date: 2026-08-31 · Found in: Claude Code (VS Code terminal, macOS 26 / Apple Silicon)

Symptom

• Pasting/reading an image in Claude Code fires a red API Error instantly.
• Every subsequent prompt repeats the same error — the session is permanently bricked.
• Bricked session produces no handoff or memory updates for the next instance.

Root cause — two separate failures

Layer 1 — the 400 itself is the provider's, and it is correct:

• Claude Code → local Ollama (ANTHROPIC_BASE_URL=http://127.0.0.1:11434, v0.31.1) → ollama.com cloud (glm-5.3:cloud).
• CC forwarded the image intact; server replied 400 this model does not support image input (ref: b1feda6a-…).
• ollama show glm-5.3:cloud confirms: capabilities are completion, thinking, tools — no vision. The model card's image claim doesn't hold for the :cloud serving path.

Layer 2 — the brick is Claude Code's:

• The rejected image stayed in the conversation history as a 634KB tool_result.
• A deterministic 400 can't be fixed by retry, but CC re-sends full history every turn → every prompt re-fails identically, with no recovery affordance offered.

Recovery

• Live session: press Esc Esc (rewind) to the point before the image was fetched — this truncates the transcript and un-bricks the session.
• Closed session: strip the image from the on-disk transcript (with backup), then claude --resume:

~/.claude/projects/-Volumes-HOMEX-…-clients-wcb/48397606-b5d4-4222-8f41-56f0cdf48f38.jsonl (image at line 12).

Prevention

• Treat glm-5.3:cloud as text-only in Claude Code. Check ollama show <model> for a vision capability before pasting images.
• On any deterministic 400: rewind immediately (Esc Esc) rather than continuing to prompt.

Reported upstream

• Claude Code feedback report drafted (session-brick behavior): a deterministic 400 should offer to strip the offending message from history instead of re-failing forever.

What Should Happen?

CC should be able to absorb the image and chat about it.

Error Messages/Logs

See report above

Steps to Reproduce

See report above

Claude Model

Other

Is this a regression?

I don't know

Last Working Version

I don't know

Claude Code Version

Claude Code v2.1.252

Platform

Other

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

Nope. Thought you should know. Doubt if you care...but your user community might!