agent terminal: coherence pass

layout
- unified prefix-column for every row kind: padding-left + negative
  text-indent so the glyph (→ ← · ◆ ✓ ✗ ⌁ !) sits in the same column
  whether the row is flat or a <details>. wraps hang under the body,
  not under the glyph.
- expandable rows drop the directional glyph from their summary text;
  the ▸/▾ disclosure marker from CSS sits in the prefix column instead,
  and the row's colour still carries cyan = outbound, muted = inbound.
- turn-start / turn-end de-weighted: bold/margin/tint dropped, the
  coloured left rule alone marks the boundary.

note classification
- stderr lines render orange with a `!` glyph (was muted `·`)
- operator-initiated notes (cancel/compact/model/new-session) render
  mauve italic (was muted `·` indistinguishable from harness chatter)
- catch-all .sys row escalates to orange `!` so unrecognised stream-json
  shapes surface for follow-up instead of hiding in muted noise

message-bearing rows
- send / ask / answer tool_use rich renderers default-open with the
  body inline; new ask + answer renderers (previously fell through to
  the generic JSON dump). recv tool_result also default-open, keyed by
  tracking tool_use_id → name across the stream so we know which
  result came from which tool.
- assistant text rows render markdown.
- bodies use vendored marked v4.0.2 (hive-fr0nt::MARKED_JS); falls
  back to plain text when the asset doesn't load.

extra-mcp tool pretty-print
- generic args formatter replaces the raw JSON dump for unknown tools
  (single-string field → `name k: "v"`; single dict / multi-field →
  trimmed `k: v · k: v …` summary)

dashboard .live .msgrow gets a text-indent: 0 reset so the new
hanging-indent metrics from TERMINAL_CSS don't leak into the flex-grid
broker rows.

hive-fr0nt/assets/terminal.css

@@ -60,41 +60,54 @@
   from { opacity: 0; transform: translateY(4px); }
   to   { opacity: 1; transform: translateY(0); }
 }
+/* Unified prefix column for every row kind. The glyph (`→ ← · ◆ ✓ ✗ ⌁ !`)
+   is the first character of the row's text content; `padding-left` reserves
+   the column and `text-indent: -1.4em` pulls the glyph back into it. Wrapped
+   continuation lines then start under the body, not under the glyph, so
+   wraps don't blur into the next row. `details.row` summaries reuse the
+   same metrics below. */
 .live .row {
   white-space: pre-wrap;
   word-break: break-word;
   padding: 0.05em 0;
   line-height: 1.45;
   border-left: 2px solid transparent;
-  padding-left: 0.5em;
+  padding-left: 1.9em;
+  text-indent: -1.4em;
   margin: 0.1em 0;
 }
 .live .row + .row { border-top: 0; }
 /* Row-kind colours. Pages register renderers that emit these classes;
-   any class no page emits is just dead CSS, which is fine. */
-.live .turn-start {
-  color: var(--amber);
-  font-weight: bold;
-  margin-top: 1em;
-  border-left-color: var(--amber);
-  padding-top: 0.3em;
-}
-.live .turn-start:first-child { margin-top: 0; }
-.live .turn-body {
-  color: var(--fg);
-  font-weight: normal;
-  margin-top: 0.15em;
-  padding-left: 1.2em;
-  opacity: 0.85;
-}
-.live .turn-end-ok   { color: var(--green); border-left-color: var(--green); margin-bottom: 0.4em; }
-.live .turn-end-fail { color: var(--red);   border-left-color: var(--red);   margin-bottom: 0.4em; }
-.live .text        { color: var(--fg);    padding-left: 1.2em; }
-.live .thinking    { color: var(--muted); font-style: italic; padding-left: 1.2em; }
-.live .tool-use    { color: var(--cyan);  padding-left: 1.2em; }
-.live .tool-result { color: var(--muted); padding-left: 1.2em; }
-.live .result      { color: var(--green); padding-left: 0.5em; }
-.live .sys, .live .note { color: var(--muted); }
+   any class no page emits is just dead CSS, which is fine. Turn-framing
+   classes carry their signal entirely on the coloured border-left rule —
+   no bold, no top/bottom margins, no background tint. The chrome was
+   overweight for what's just a "this is a boundary" marker. */
+.live .turn-start    { color: var(--amber); border-left-color: var(--amber); }
+/* turn-body is a child block under turn-start carrying the wake-prompt
+   body; reset text-indent so wrapped content stays under its own column
+   instead of pulling back into the parent's prefix. */
+.live .turn-body     { color: var(--fg); text-indent: 0; margin-top: 0.15em; }
+/* Any child block (markdown body, nested details) resets the parent
+   row's hanging indent so the content lays out from column 0 of the
+   body area. */
+.live .row .md, .live .row > details { text-indent: 0; }
+.live .turn-end-ok   { color: var(--green); border-left-color: var(--green); }
+.live .turn-end-fail { color: var(--red);   border-left-color: var(--red); }
+.live .text        { color: var(--fg);    }
+.live .thinking    { color: var(--muted); font-style: italic; }
+.live .tool-use    { color: var(--cyan);  }
+.live .tool-result { color: var(--muted); }
+.live .result      { color: var(--green); }
+.live .note        { color: var(--muted); }
+/* Distinguish stderr lines (orange) and operator-initiated notes
+   (mauve, lightly emphasised) from ambient harness chatter so the
+   eye picks out anomalies + operator actions in the scrollback. */
+.live .note.stderr { color: var(--amber); }
+.live .note.op     { color: var(--purple); font-style: italic; }
+/* The .sys catch-all fires when renderStream landed an event shape it
+   couldn't classify. Make it visually loud so silently-dropped event
+   types surface for follow-up. */
+.live .sys         { color: var(--amber); }
 .live .unread-badge {
   color: var(--amber);
   font-weight: normal;
@@ -137,28 +150,31 @@
   pointer-events: auto;
 }
 .tail-pill:hover { filter: brightness(1.1); }
+/* Expandable rows reuse the flat-row prefix metrics (padding-left +
+   negative text-indent) so the disclosure glyph (`▸ / ▾`) lands in
+   exactly the same column as flat-row prefix glyphs (`→ ← · ◆ ✓ ✗`).
+   Summary text omits the per-row directional glyph (the row colour
+   already carries cyan = outbound tool, muted = inbound result) so
+   the prefix column doesn't have to fit two glyphs side-by-side. */
 details.row {
   white-space: normal;
-  padding-left: 0.5em;
 }
 details.row > summary {
   cursor: pointer;
-  color: var(--muted);
   list-style: none;
   white-space: pre-wrap;
   word-break: break-word;
 }
 details.row > summary::before {
   content: '▸ ';
-  color: var(--muted);
-  display: inline-block;
-  width: 1em;
+  color: inherit;
 }
 details.row[open] > summary::before { content: '▾ '; }
-details.row.tool-result-block > summary { color: var(--muted); }
-details.row > pre.diff-body {
-  margin: 0.3em 0 0.4em 1.2em;
+details.row > pre.diff-body,
+details.row > pre.tool-body {
+  margin: 0.3em 0 0.4em 0;
   padding: 0.4em 0.6em;
+  text-indent: 0;
   background: rgba(255, 255, 255, 0.02);
   border-left: 2px solid var(--purple-dim);
   white-space: pre-wrap;
@@ -166,17 +182,44 @@ details.row > pre.diff-body {
   max-height: 22em;
   overflow-y: auto;
 }
+details.row > pre.tool-body { color: var(--fg); }
 details.row > pre.diff-body .diff-add { color: var(--green); }
 details.row > pre.diff-body .diff-del { color: var(--red); }
 details.row > pre.diff-body .diff-ctx { color: var(--fg); }
-details.row > pre.tool-body {
-  margin: 0.3em 0 0.4em 1.2em;
+/* Markdown body inside a row (assistant text, send/recv/ask/answer
+   message bodies). Inline elements get muted accents; block elements
+   reset the parent row's hanging indent so content lays out cleanly. */
+.live .row .md p { margin: 0.2em 0; }
+.live .row .md p:first-child { margin-top: 0; }
+.live .row .md p:last-child  { margin-bottom: 0; }
+.live .row .md code {
+  background: rgba(255, 255, 255, 0.06);
+  padding: 0.05em 0.3em;
+  border-radius: 3px;
+  font-size: 0.95em;
+}
+.live .row .md pre {
+  margin: 0.3em 0;
   padding: 0.4em 0.6em;
-  background: rgba(255, 255, 255, 0.03);
+  background: rgba(255, 255, 255, 0.04);
   border-left: 2px solid var(--purple-dim);
-  color: var(--fg);
+  text-indent: 0;
   white-space: pre-wrap;
   word-break: break-word;
-  max-height: 22em;
-  overflow-y: auto;
+}
+.live .row .md pre code {
+  background: transparent;
+  padding: 0;
+  border-radius: 0;
+}
+.live .row .md a { color: var(--cyan); text-decoration: underline; }
+.live .row .md strong { color: inherit; font-weight: bold; }
+.live .row .md em { color: inherit; font-style: italic; }
+.live .row .md ul, .live .row .md ol { margin: 0.2em 0 0.2em 1.4em; padding: 0; }
+.live .row .md li { margin: 0.05em 0; }
+.live .row .md blockquote {
+  margin: 0.2em 0;
+  padding-left: 0.6em;
+  border-left: 2px solid var(--purple-dim);
+  color: var(--muted);
 }

hive-fr0nt/src/lib.rs

@@ -32,3 +32,11 @@
 pub const BASE_CSS: &str = include_str!("../assets/base.css");
 pub const TERMINAL_CSS: &str = include_str!("../assets/terminal.css");
 pub const TERMINAL_JS: &str = include_str!("../assets/terminal.js");
+/// Vendored [marked](https://github.com/markedjs/marked) v4.0.2 UMD bundle.
+/// Exposes a global `marked` with `.parse(src, opts)` returning HTML. Used
+/// by the per-agent terminal to render message bodies (`send` / `recv` /
+/// `ask` / `answer` / assistant text) with basic markdown — paragraphs,
+/// lists, fenced + inline code, bold/italic, links. Vendored rather than
+/// CDN-loaded so the per-agent page works on operator machines without
+/// internet egress (the container itself never fetches it).
+pub const MARKED_JS: &str = include_str!("../assets/marked.min.js");