v0.12.1

Released 2026-09-04

Highlights

Empty grey boxes no longer appear in the middle of a reply. Every code block briefly drew one while it streamed, and a model that opened a fence without filling it left one behind for good.

A code fence with nothing in it yet parses to an empty <pre><code></code></pre>, and the stylesheet paints any pre in a message as a bordered, padded code box — so an empty one rendered as a stray grey bar with no content in it. This was not an edge case: every code block passed through that state, because the opening fence arrives before the body does, and the bar sat there until the first token of content landed.
Parts that render to nothing are now hidden on the basis of what will actually be drawn, rather than whether the markdown source is blank. A lone opening fence is three non-blank characters that draw nothing, so the old source-text check passed it through — which is what let the empty box reach the screen in the first place.
Elements that show without carrying any text — an image, a rule, a table, a task-list checkbox — are counted as visible explicitly, so a part containing only an image is not mistaken for an empty one and hidden.

Install the .vsix attached to this release via:

code --install-extension opencode-vscode-chat-0.12.1.vsix