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hyperhive/docs/web-ui/terminal-rendering.md
iris be6036b216 swarm-ui: a hide debug output toggle in the header's settings menu
The row moves from the per-agent page into @hive/shared so both pages mount
the same one. The terminal's debug rows now follow the preference as it
changes, so rows already on screen hide or show at once instead of only the
rows that arrive after the toggle.
2026-10-12 21:41:23 +02:00

3.7 KiB

Per-agent terminal: row taxonomy (as built)

The per-agent web UI's live pane renders one row per TermMsg (hive-agent/src/term_msg.rs): {ts, icon?, level: debug|info|warn|error, summary, body?, body_format?: markdown|diff, coalesce_key?}. Classification (icon, summary text, whether a tool call gets an expandable body) happens server-side, once — term_msg.rs + stream_enrich.rs — and both GET /api/events/history and GET /api/events/stream serve it identically as TermEnvelope { seq?, msgs: TermMsg[] } frames (hive-agent/src/web_ui/stream.rs).

ts is ISO 8601 UTC (2026-09-13T12:35:03Z) and is the source event's time, stamped at classify time from the event's own stamp — so a row replayed from sqlite says when it happened, not when a client fetched it. It lives on the row rather than on the envelope because the swarm queue publishes rows bare, with no envelope around them (hive-agent/src/swarm_term.rs); a subscriber there has nowhere else to read the time from.

The frontend renders a TermMsg close to as-is (frontend/packages/shared/src/terminal/Row.tsx — moved out of packages/agent once swarm-ui became a second consumer of it): level picks the CSS colour (terminal.css's .live .level-*), an empty summary + markdown body renders as a flat row with just the body (assistant text), and any other bodied row is an expandable <details>, opened by default according to the operator's expand-tool-output preference (getExpandDetailsPref()) — uniformly, no per-tool override. There's no separate client-side row model or classification step.

Layout

Every row is its own 2-column grid — icon column (.row-glyph, width from the --row-icon-col custom property) then content column (.row-content, or a markdown body's own .md class) — so an icon's left edge lands in the same place regardless of row kind. A <details> row grids its <summary> instead of itself (so the <pre> body below can stack full-width), using the exact same grid-template-columns value, with the disclosure caret leading the summary text rather than the icon. One shared column definition, not two independently computed offsets kept in sync by hand — see terminal.css's own comment on the incident that motivated the change.

Levels

Level Colour Roughly
debug muted thinking, coalesced ticks, ambient harness chatter
info default fg turn start/ok, assistant text, tool calls + results
warn amber, left rule stderr, an unrecognised event shape, API retries
error red, left rule turn failed, a tool result with is_error: true

The settings menu's "hide debug output" toggle (getHideDebugPref(), @hive/shared/prefs.js) skips debug-level rows entirely rather than muting them further — client-side only, no reload. The per-agent page and the swarm UI both have the toggle, as one shared row (@hive/shared/hide-debug-setting.js). Each browser origin keeps its own setting. A debug row follows the toggle as it changes, so rows already on screen hide or show at once, not only the rows that arrive after it.

Per-tool icon + summary formatting (what a Read/Edit/send call's row actually says) lives in stream_enrich.rs's fmt_tool_use() family — read that when you need the specifics, this doc doesn't duplicate it.

Markdown

frontend/packages/shared/src/terminal/markdown.ts's renderMarkdown() runs marked.parse() through DOMPurify into a <div class="md">. Applied to any TermMsg with body_format: "markdown".

Dashboard side (not covered here)

The main dashboard's message-flow pane is a different shape: broker messages render as .msgrow grid lines, not agent-terminal rows.