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tui-transcript-message-rows.md

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TUI Transcript Message Rows

Goal

The transcript should make user prompts visually distinct without repeating speaker labels on every row. In normal NL-to-code sessions the user message is the main turn boundary, so the row background should carry that distinction while assistant output stays on the regular transcript surface.

Scope

  • Hide visible User: and Agent: speaker labels in the TUI transcript.
  • Apply a distinct neutral gray background only to user message rows.
  • Keep assistant message rows on the normal transcript background.
  • Keep assistant markdown rendering, tool parts, thought parts, scrollback, copy, and session/runtime message contracts unchanged.
  • Do not add a configuration flag or environment variable.

Rendering Contract

  • User rows use palette.userMessageBackground, a neutral gray that contrasts with the transcript background without using status colors.
  • User rows use one terminal row of top and bottom padding so the prompt text does not touch the highlighted block edge.
  • Agent rows use palette.background.
  • User plain text uses the default transcript foreground.
  • System plain text remains warning-colored plain text.
  • Agent text continues to flow through MarkdownText.
  • The row background is a TUI-only projection detail. It must not change persisted session messages, ZCode app-server projection, model-visible history, or transcript export data.

Tests

  • TUI rendering tests assert that user rows use the dedicated background.
  • TUI rendering tests assert that user rows include vertical padding.
  • TUI rendering tests assert that agent rows keep the normal background.
  • TUI rendering tests assert that visible transcript text no longer includes User: or Agent: labels.