add tool_renderers.rs (missing from cherry-pick)

src/ui/chat/tool_renderers.rs

@@ -0,0 +1,789 @@
+//! Per-tool-type rendering for tool cards.
+//!
+//! Pure functions dispatched by tool name so compact args, result previews,
+//! and full card bodies are semantically meaningful rather than generic
+//! key:value dumps.
+
+use ratatui::{
+    style::{Color, Modifier, Style},
+    text::{Line, Span},
+};
+use serde_json::Value;
+
+use super::ChatPalette;
+
+// ─── Helpers ──────────────────────────────────────────────────────────
+
+pub(crate) fn clip(s: &str, max: usize) -> String {
+    if s.chars().count() <= max {
+        return s.to_string();
+    }
+    let mut out: String = s.chars().take(max.saturating_sub(1)).collect();
+    out.push('…');
+    out
+}
+
+fn json_str<'a>(map: &'a serde_json::Map<String, Value>, key: &str) -> Option<&'a str> {
+    map.get(key).and_then(|v| v.as_str()).filter(|s| !s.is_empty())
+}
+
+fn json_bool(map: &serde_json::Map<String, Value>, key: &str) -> Option<bool> {
+    map.get(key).and_then(|v| v.as_bool())
+}
+
+fn json_u64(map: &serde_json::Map<String, Value>, key: &str) -> Option<u64> {
+    map.get(key).and_then(|v| v.as_u64())
+}
+
+// ─── Tier 1: Per-tool argument summarization ──────────────────────────
+
+/// Format tool arguments into a short human-readable string for compact cards.
+pub fn summarize_tool_args(name: &str, arguments: &str) -> String {
+    let parsed: Result<Value, _> = serde_json::from_str(arguments);
+    let map = match parsed {
+        Ok(Value::Object(m)) => m,
+        Ok(other) => return clip(&other.to_string(), 120),
+        Err(_) => return clip(arguments, 120),
+    };
+    match name {
+        "bash" => summarize_bash(&map),
+        "read" => summarize_read(&map),
+        "write" => summarize_write(&map),
+        "edit" => summarize_edit(&map),
+        "grep" => summarize_grep(&map),
+        "glob" => summarize_glob(&map),
+        "list_dir" => summarize_list_dir(&map),
+        "todo" => summarize_todo(&map),
+        "subagent" => summarize_subagent(&map),
+        "atmosphere" => summarize_atmosphere(&map),
+        "outfit" => summarize_outfit(&map),
+        "itinerary" => summarize_itinerary(&map),
+        "schedule" => summarize_schedule(&map),
+        "memory" => summarize_memory(&map),
+        "nickname" => summarize_nickname(&map),
+        "reach" | "consult" => summarize_summon(&map),
+        _ => summarize_generic(&map),
+    }
+}
+
+fn summarize_bash(map: &serde_json::Map<String, Value>) -> String {
+    match json_str(map, "command") {
+        Some(cmd) => {
+            let cmd = clip(cmd, 80);
+            let extra = if json_bool(map, "run_in_background").unwrap_or(false) {
+                " [bg]"
+            } else {
+                ""
+            };
+            format!("$ {}{}", cmd, extra)
+        }
+        None => summarize_generic(map),
+    }
+}
+
+fn summarize_read(map: &serde_json::Map<String, Value>) -> String {
+    match json_str(map, "path") {
+        Some(p) => {
+            let p = clip(p, 60);
+            let extra = if json_bool(map, "force").unwrap_or(false) {
+                " [force]"
+            } else {
+                ""
+            };
+            format!("{}{}", p, extra)
+        }
+        None => summarize_generic(map),
+    }
+}
+
+fn summarize_write(map: &serde_json::Map<String, Value>) -> String {
+    match json_str(map, "path") {
+        Some(p) => {
+            let p = clip(p, 50);
+            let mode = json_str(map, "mode").unwrap_or("write");
+            // Estimate content length from the content field
+            let content_len = map
+                .get("content")
+                .and_then(|v| v.as_str())
+                .map(|s| s.len());
+            let label = if mode == "append" { "append" } else { "write" };
+            match content_len {
+                Some(n) if n > 0 => format!("{} → {} ({}B)", label, p, n),
+                _ => format!("{} → {}", label, p),
+            }
+        }
+        None => summarize_generic(map),
+    }
+}
+
+fn summarize_edit(map: &serde_json::Map<String, Value>) -> String {
+    let path = json_str(map, "path").map(|p| clip(p, 40)).unwrap_or_default();
+    let old = json_str(map, "old_string").map(|s| clip(s, 30)).unwrap_or_default();
+    let all = json_bool(map, "replace_all").unwrap_or(false);
+    if path.is_empty() {
+        return summarize_generic(map);
+    }
+    if !old.is_empty() {
+        if all {
+            format!("{}: replace_all \"{}\"", path, old)
+        } else {
+            format!("{}: \"{}\"", path, old)
+        }
+    } else {
+        path
+    }
+}
+
+fn summarize_grep(map: &serde_json::Map<String, Value>) -> String {
+    let pattern = json_str(map, "pattern").map(|p| clip(p, 40)).unwrap_or_default();
+    let path = json_str(map, "path").filter(|p| *p != ".");
+    let context = json_u64(map, "context").unwrap_or(0);
+    let mut out = if pattern.is_empty() {
+        return summarize_generic(map);
+    } else {
+        format!("\"{}\"", pattern)
+    };
+    if let Some(p) = path {
+        out.push_str(&format!(" {}", clip(p, 30)));
+    }
+    if context > 0 {
+        out.push_str(&format!(" -C {}", context));
+    }
+    out
+}
+
+fn summarize_glob(map: &serde_json::Map<String, Value>) -> String {
+    let pattern = json_str(map, "pattern").map(|p| clip(p, 50)).unwrap_or_default();
+    if pattern.is_empty() {
+        return summarize_generic(map);
+    }
+    let base = json_str(map, "base");
+    match base {
+        Some(b) if b != "." => format!("{} (in {})", pattern, clip(b, 30)),
+        _ => pattern,
+    }
+}
+
+fn summarize_list_dir(map: &serde_json::Map<String, Value>) -> String {
+    json_str(map, "path")
+        .map(|p| clip(p, 50))
+        .unwrap_or_else(|| ".".to_string())
+}
+
+fn summarize_todo(map: &serde_json::Map<String, Value>) -> String {
+    let action = json_str(map, "action").unwrap_or("list");
+    if action == "list" {
+        return "list".to_string();
+    }
+    let text = json_str(map, "text")
+        .or_else(|| json_str(map, "id"))
+        .map(|s| clip(s, 50));
+    match text {
+        Some(t) => format!("{}: {}", action, t),
+        None => action.to_string(),
+    }
+}
+
+fn summarize_subagent(map: &serde_json::Map<String, Value>) -> String {
+    let prompt = json_str(map, "prompt").map(|s| clip(s, 50)).unwrap_or_default();
+    let sub_type = json_str(map, "subagent_type").filter(|t| *t != "general-purpose");
+    let bg = json_bool(map, "run_in_background").unwrap_or(false);
+    let mut out = String::new();
+    if bg {
+        out.push_str("[bg] ");
+    }
+    if let Some(t) = sub_type {
+        out.push_str(&format!("[{}] ", t));
+    }
+    if !prompt.is_empty() {
+        out.push_str(&prompt);
+    }
+    if out.is_empty() {
+        return summarize_generic(map);
+    }
+    out
+}
+
+fn summarize_atmosphere(map: &serde_json::Map<String, Value>) -> String {
+    json_str(map, "name")
+        .map(|n| n.to_string())
+        .unwrap_or_else(|| summarize_generic(map))
+}
+
+fn summarize_outfit(map: &serde_json::Map<String, Value>) -> String {
+    json_str(map, "name")
+        .map(|n| n.to_string())
+        .unwrap_or_else(|| summarize_generic(map))
+}
+
+fn summarize_itinerary(map: &serde_json::Map<String, Value>) -> String {
+    let action = json_str(map, "action").unwrap_or("describe");
+    let title = json_str(map, "title")
+        .or_else(|| {
+            // Try first stop from `stops` array
+            map.get("stops")
+                .and_then(|v| v.as_array())
+                .and_then(|a| a.first())
+                .and_then(|v| v.as_str())
+        })
+        .map(|s| clip(s, 40));
+    match title {
+        Some(t) => format!("{}: {}", action, t),
+        None => action.to_string(),
+    }
+}
+
+fn summarize_schedule(map: &serde_json::Map<String, Value>) -> String {
+    let action = json_str(map, "action").unwrap_or("list");
+    let name = json_str(map, "name").map(|n| clip(n, 30));
+    match name {
+        Some(n) => format!("{}: {}", action, n),
+        None => action.to_string(),
+    }
+}
+
+fn summarize_memory(map: &serde_json::Map<String, Value>) -> String {
+    let cmd = json_str(map, "command").unwrap_or("list");
+    let path = json_str(map, "path").map(|p| clip(p, 40));
+    match path {
+        Some(p) => format!("{} {}", cmd, p),
+        None => cmd.to_string(),
+    }
+}
+
+fn summarize_nickname(map: &serde_json::Map<String, Value>) -> String {
+    let action = json_str(map, "action").unwrap_or("get");
+    let name = json_str(map, "name").map(|n| clip(n, 30));
+    match name {
+        Some(n) => format!("{}: {}", action, n),
+        None => action.to_string(),
+    }
+}
+
+fn summarize_summon(map: &serde_json::Map<String, Value>) -> String {
+    let target = json_str(map, "target").map(|t| clip(t, 40)).unwrap_or_default();
+    if target.is_empty() {
+        return summarize_generic(map);
+    }
+    target
+}
+
+fn summarize_generic(map: &serde_json::Map<String, Value>) -> String {
+    let parts: Vec<String> = map
+        .iter()
+        .map(|(k, v)| {
+            let s = match v {
+                Value::String(s) => clip(s, 60),
+                other => clip(&other.to_string(), 60),
+            };
+            format!("{}: {}", k, s)
+        })
+        .collect();
+    parts.join("  ·  ")
+}
+
+// ─── Tier 2: Compact result details ───────────────────────────────────
+
+/// Return an optional second-line detail for the compact card.
+/// For completed tools this can show a one-line output preview (e.g. the
+/// last line of a bash run, the match count for grep).  For errors it is
+/// always the first error line.  `None` means no detail line.
+pub fn compact_result_details(name: &str, output: &str, is_error: bool) -> Option<String> {
+    if is_error {
+        return output.lines().next().map(|l| clip(l.trim(), 80));
+    }
+    match name {
+        "bash" => {
+            // Last non-empty line of output
+            output
+                .lines()
+                .rev()
+                .find(|l| !l.trim().is_empty())
+                .map(|l| clip(l.trim(), 80))
+        }
+        "grep" => {
+            // First line often says "N matches for pattern:"
+            output.lines().next().map(|l| clip(l.trim(), 80))
+        }
+        "glob" => {
+            output.lines().next().map(|l| clip(l.trim(), 80))
+        }
+        "edit" => {
+            // Edit output is a prose summary
+            output.lines().next().map(|l| clip(l.trim(), 80))
+        }
+        _ => None,
+    }
+}
+
+// ─── Tier 3: Full card body rendering ─────────────────────────────────
+
+/// Render the body of a full tool card.
+///
+/// Returns `(args_lines, body_lines)` — the argument summary and the
+/// output rendering, both ready to be inserted into the bubble layout.
+pub fn render_card_body(
+    name: &str,
+    arguments: &str,
+    output: Option<&str>,
+    is_error: bool,
+    inner_width: usize,
+    palette: &ChatPalette,
+) -> (Vec<Line<'static>>, Vec<Line<'static>>) {
+    let dim_color = if is_error {
+        palette.compaction
+    } else {
+        palette.tool_dim
+    };
+    let fg_color = if is_error {
+        palette.compaction
+    } else {
+        palette.agent_primary
+    };
+    let mdpal = crate::ui::markdown::MarkdownPalette::from_chat_palette(palette);
+
+    // Argument line(s)
+    let args_summary = summarize_tool_args(name, arguments);
+    let args_line = Line::from(vec![Span::styled(args_summary, Style::default().fg(dim_color))]);
+    let args_lines = crate::ui::markdown::wrap_line(args_line, inner_width);
+
+    // Body — per-tool output rendering
+    let body_lines = match (name, output) {
+        ("bash", Some(out)) if !out.is_empty() => render_bash_body(out, inner_width, palette),
+        ("read", Some(out)) if !out.is_empty() => render_read_body(out, arguments, inner_width, palette, &mdpal),
+        ("grep", Some(out)) if !out.is_empty() => render_grep_body(out, inner_width, palette, &mdpal),
+        ("glob", Some(out)) if !out.is_empty() => render_glob_body(out, inner_width, palette, &mdpal),
+        ("write", Some(out)) if !out.is_empty() => render_write_body(out, arguments, inner_width, palette),
+        ("edit", Some(out)) if !out.is_empty() => render_edit_body(out, arguments, inner_width, palette),
+        ("memory", Some(out)) => render_memory_body(out, inner_width, &mdpal, palette),
+        ("list_dir", Some(out)) if !out.is_empty() => render_list_dir_body(out, inner_width, palette),
+        _ => {
+            // Fallback: markdown-rendered preview (existing behavior)
+            if let Some(out) = output {
+                let preview = preview_lines(out, 12);
+                let rendered = crate::ui::markdown::render_with_width(
+                    &preview,
+                    fg_color,
+                    Some(inner_width),
+                    &mdpal,
+                );
+                rendered
+            } else {
+                Vec::new()
+            }
+        }
+    };
+
+    (args_lines, body_lines)
+}
+
+fn render_bash_body(
+    output: &str,
+    inner_width: usize,
+    palette: &ChatPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let mut lines: Vec<Line<'static>> = Vec::new();
+
+    // ┌─ header
+    let top = format!("┌─ bash output ");
+    let top_dashes = inner_width.saturating_sub(top.chars().count()).max(0);
+    let top_line = Line::from(Span::styled(
+        format!("{}{}", top, "─".repeat(top_dashes)),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    ));
+    lines.push(top_line);
+
+    // Content — up to 30 lines, monospace-style (plain spans)
+    let max_lines = 30usize;
+    let displayed: Vec<&str> = output.lines().take(max_lines).collect();
+    for line_text in &displayed {
+        let clipped = clip(line_text, inner_width);
+        lines.push(Line::from(Span::styled(
+            format!(" {} ", clipped),
+            Style::default().fg(palette.tool_accent),
+        )));
+    }
+    let total = output.lines().count();
+    if total > max_lines {
+        lines.push(Line::from(Span::styled(
+            format!("  … ({} more lines)", total - max_lines),
+            Style::default().fg(dim).add_modifier(Modifier::ITALIC),
+        )));
+    }
+
+    // └─ footer
+    let bottom = format!("└{}", "─".repeat(inner_width.saturating_sub(1)));
+    lines.push(Line::from(Span::styled(bottom, Style::default().fg(dim).add_modifier(Modifier::DIM))));
+
+    lines
+}
+
+fn render_read_body(
+    output: &str,
+    arguments: &str,
+    _inner_width: usize,
+    _palette: &ChatPalette,
+    mdpal: &crate::ui::markdown::MarkdownPalette,
+) -> Vec<Line<'static>> {
+    // For .md files, render as markdown. For everything else, render as
+    // a code block with guessed language from arguments.
+    let path = arguments_to_path(arguments);
+    let ext = path.rsplit('.').next().map(|s| s.to_lowercase());
+    let is_markdown = matches!(ext.as_deref(), Some("md" | "mdx"));
+    let lang_label = match ext.as_deref() {
+        Some("rs") => "rust",
+        Some("py") => "python",
+        Some("js") | Some("ts") | Some("tsx") => ext.as_deref().unwrap_or("code"),
+        Some("toml") => "toml",
+        Some("json") => "json",
+        Some("yaml") | Some("yml") => "yaml",
+        Some("md") | Some("mdx") => "markdown",
+        Some(other) => other,
+        None => "code",
+    };
+
+    if is_markdown {
+        // Full markdown render for prose files
+        let fg = mdpal.code_fg;
+        let rendered = crate::ui::markdown::render_with_width(output, fg, None, mdpal);
+        return rendered;
+    }
+
+    // Code block with language label
+    let fg = mdpal.code_fg;
+    let bg = mdpal.code_bg;
+    let code_style = Style::default().fg(fg).bg(bg);
+    let dim_style = Style::default().fg(mdpal.code_fg).add_modifier(Modifier::DIM);
+
+    // This is a simplified code-block render that doesn't depend on the
+    // markdown renderer's internal ┌─ / └─ borders, since we want a
+    // monospace look in the tool card.
+    let mut lines: Vec<Line<'static>> = Vec::new();
+    let header = format!("┌─ {} ", lang_label);
+    let dashes = _inner_width.saturating_sub(header.chars().count()).max(0);
+    lines.push(Line::from(Span::styled(
+        format!("{}{}", header, "─".repeat(dashes)),
+        dim_style,
+    )));
+
+    let max_lines = 30usize;
+    let displayed: Vec<&str> = output.lines().take(max_lines).collect();
+    for line_text in &displayed {
+        let clipped = clip(line_text, _inner_width.saturating_sub(2).max(10));
+        lines.push(Line::from(Span::styled(
+            format!(" {}", clipped),
+            code_style,
+        )));
+    }
+    let total = output.lines().count();
+    if total > max_lines {
+        lines.push(Line::from(Span::styled(
+            format!("  … ({} more lines)", total - max_lines),
+            dim_style.add_modifier(Modifier::ITALIC),
+        )));
+    }
+    lines.push(Line::from(Span::styled(
+        format!("└{}", "─".repeat(_inner_width.saturating_sub(1))),
+        dim_style,
+    )));
+
+    lines
+}
+
+fn render_grep_body(
+    output: &str,
+    inner_width: usize,
+    palette: &ChatPalette,
+    mdpal: &crate::ui::markdown::MarkdownPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let mut lines: Vec<Line<'static>> = Vec::new();
+
+    // First line is the match count header
+    if let Some(first) = output.lines().next() {
+        lines.push(Line::from(Span::styled(
+            clip(first.trim(), inner_width),
+            Style::default().fg(palette.tool_accent).add_modifier(Modifier::BOLD),
+        )));
+        lines.push(Line::from(Span::styled(
+            "─".repeat(inner_width.min(40)),
+            Style::default().fg(dim).add_modifier(Modifier::DIM),
+        )));
+    }
+
+    // Match lines — cap at 20
+    let max_lines = 20usize;
+    for line_text in output.lines().skip(1).take(max_lines) {
+        let clipped = clip(line_text.trim(), inner_width);
+        lines.push(Line::from(Span::styled(
+            clipped,
+            Style::default().fg(dim),
+        )));
+    }
+    let total = output.lines().count().saturating_sub(1);
+    if total > max_lines {
+        lines.push(Line::from(Span::styled(
+            format!("  … ({} more matches)", total - max_lines),
+            Style::default().fg(dim).add_modifier(Modifier::ITALIC),
+        )));
+    }
+
+    lines
+}
+
+fn render_glob_body(
+    output: &str,
+    inner_width: usize,
+    palette: &ChatPalette,
+    _mdpal: &crate::ui::markdown::MarkdownPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let mut lines: Vec<Line<'static>> = Vec::new();
+
+    if let Some(first) = output.lines().next() {
+        lines.push(Line::from(Span::styled(
+            clip(first.trim(), inner_width),
+            Style::default().fg(palette.tool_accent).add_modifier(Modifier::BOLD),
+        )));
+        lines.push(Line::from(Span::styled(
+            "─".repeat(inner_width.min(40)),
+            Style::default().fg(dim).add_modifier(Modifier::DIM),
+        )));
+    }
+
+    let max_lines = 30usize;
+    for line_text in output.lines().skip(1).take(max_lines) {
+        let clipped = clip(line_text.trim(), inner_width);
+        lines.push(Line::from(Span::styled(
+            clipped,
+            Style::default().fg(dim),
+        )));
+    }
+    let total = output.lines().count().saturating_sub(1);
+    if total > max_lines {
+        lines.push(Line::from(Span::styled(
+            format!("  … ({} more files)", total - max_lines),
+            Style::default().fg(dim).add_modifier(Modifier::ITALIC),
+        )));
+    }
+
+    lines
+}
+
+fn render_list_dir_body(
+    output: &str,
+    inner_width: usize,
+    palette: &ChatPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let mut lines: Vec<Line<'static>> = Vec::new();
+
+    let max_lines = 30usize;
+    for line_text in output.lines().take(max_lines) {
+        let clipped = clip(line_text.trim(), inner_width);
+        lines.push(Line::from(Span::styled(
+            clipped,
+            Style::default().fg(dim),
+        )));
+    }
+    let total = output.lines().count();
+    if total > max_lines {
+        lines.push(Line::from(Span::styled(
+            format!("  … ({} more entries)", total - max_lines),
+            Style::default().fg(dim).add_modifier(Modifier::ITALIC),
+        )));
+    }
+
+    lines
+}
+
+fn render_write_body(
+    output: &str,
+    arguments: &str,
+    inner_width: usize,
+    palette: &ChatPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let fg = palette.tool_accent;
+    let path = arguments_to_path(arguments);
+
+    let mut lines: Vec<Line<'static>> = Vec::new();
+    // Header with path and output summary
+    let header = format!("┌─ {} ", if path.is_empty() { "write" } else { &path });
+    let dashes = inner_width.saturating_sub(header.chars().count()).max(0);
+    lines.push(Line::from(Span::styled(
+        format!("{}{}", header, "─".repeat(dashes)),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    )));
+    // Output summary line — write returns prose like "Appended N chars to path"
+    let clipped = clip(output.trim(), inner_width.saturating_sub(2).max(10));
+    lines.push(Line::from(Span::styled(
+        format!(" {}", clipped),
+        Style::default().fg(fg),
+    )));
+    // Footer
+    lines.push(Line::from(Span::styled(
+        format!("└{}", "─".repeat(inner_width.saturating_sub(1))),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    )));
+    lines
+}
+
+fn render_edit_body(
+    output: &str,
+    arguments: &str,
+    inner_width: usize,
+    palette: &ChatPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let fg = palette.tool_accent;
+    let path = arguments_to_path(arguments);
+
+    let mut lines: Vec<Line<'static>> = Vec::new();
+    // Header with path
+    let header = format!("┌─ edit{} ", if path.is_empty() { "" } else { ":" });
+    let label = format!("{}{}", header, &path);
+    let dashes = inner_width.saturating_sub(label.chars().count()).max(0);
+    lines.push(Line::from(Span::styled(
+        format!("{}{}", label, "─".repeat(dashes)),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    )));
+    // Edit returns prose like "Edited file.rs. +42 chars, 10 -> 12 lines"
+    if let Some(first) = output.lines().next() {
+        let clipped = clip(first.trim(), inner_width.saturating_sub(2).max(10));
+        lines.push(Line::from(Span::styled(
+            format!(" {}", clipped),
+            Style::default().fg(fg),
+        )));
+    }
+    // Footer
+    lines.push(Line::from(Span::styled(
+        format!("└{}", "─".repeat(inner_width.saturating_sub(1))),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    )));
+    lines
+}
+
+fn render_memory_body(
+    output: &str,
+    inner_width: usize,
+    mdpal: &crate::ui::markdown::MarkdownPalette,
+    palette: &ChatPalette,
+) -> Vec<Line<'static>> {
+    let dim = palette.tool_dim;
+    let mut lines: Vec<Line<'static>> = Vec::new();
+
+    // Header
+    let header = format!("┌─ memory ");
+    let dashes = inner_width.saturating_sub(header.chars().count()).max(0);
+    lines.push(Line::from(Span::styled(
+        format!("{}{}", header, "─".repeat(dashes)),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    )));
+
+    if output.is_empty() {
+        lines.push(Line::from(Span::styled(
+            " (empty)",
+            Style::default().fg(dim).add_modifier(Modifier::ITALIC),
+        )));
+        lines.push(Line::from(Span::styled(
+            format!("└{}", "─".repeat(inner_width.saturating_sub(1))),
+            Style::default().fg(dim).add_modifier(Modifier::DIM),
+        )));
+        return lines;
+    }
+
+    // Try to split frontmatter from body — frontmatter lives between --- lines
+    let body = if output.starts_with("---") {
+        if let Some(end) = output[3..].find("\n---") {
+            let frontmatter = &output[..end + 6]; // include closing ---
+            let body = output[end + 6..].trim();
+            // Render frontmatter as folded single-line summary
+            let fm_summary = summarize_frontmatter(frontmatter);
+            lines.push(Line::from(Span::styled(
+                format!(" {} ", fm_summary),
+                Style::default().fg(dim).add_modifier(Modifier::DIM),
+            )));
+            body
+        } else {
+            output
+        }
+    } else {
+        output
+    };
+
+    // Render body as markdown (up to 30 lines)
+    if !body.is_empty() {
+        let max_lines = 30usize;
+        let preview: String = body.lines().take(max_lines).collect::<Vec<&str>>().join("\n");
+        let rendered = crate::ui::markdown::render_with_width(
+            &preview,
+            mdpal.code_fg,
+            Some(inner_width.saturating_sub(2).max(8)),
+            mdpal,
+        );
+        lines.extend(rendered);
+
+        let total = body.lines().count();
+        if total > max_lines {
+            lines.push(Line::from(Span::styled(
+                format!("  … ({} more lines)", total - max_lines),
+                Style::default().fg(dim).add_modifier(Modifier::ITALIC),
+            )));
+        }
+    }
+
+    // Footer
+    lines.push(Line::from(Span::styled(
+        format!("└{}", "─".repeat(inner_width.saturating_sub(1))),
+        Style::default().fg(dim).add_modifier(Modifier::DIM),
+    )));
+    lines
+}
+
+/// Extract a one-line summary from YAML frontmatter: `description · tags · limit`
+fn summarize_frontmatter(frontmatter: &str) -> String {
+    let mut desc = String::new();
+    let mut tags = String::new();
+    let mut limit = String::new();
+
+    for line in frontmatter.lines() {
+        let line = line.trim();
+        if let Some(val) = line.strip_prefix("description:") {
+            desc = val.trim().to_string();
+        } else if let Some(val) = line.strip_prefix("tags:") {
+            tags = val.trim().to_string();
+        } else if let Some(val) = line.strip_prefix("limit:") {
+            limit = val.trim().to_string();
+        }
+    }
+
+    let mut parts: Vec<&str> = Vec::new();
+    if !desc.is_empty() { parts.push(&desc); }
+    if !tags.is_empty() { parts.push(&tags); }
+    if !limit.is_empty() { parts.push(&limit); }
+    if parts.is_empty() {
+        return "📄 frontmatter".to_string();
+    }
+    parts.join("  ·  ")
+}
+
+// ─── Internal helpers ──────────────────────────────────────────────────
+
+/// Extract just the path from an arguments JSON for read-body heuristics.
+fn arguments_to_path(arguments: &str) -> String {
+    let parsed: Result<Value, _> = serde_json::from_str(arguments);
+    match parsed {
+        Ok(Value::Object(map)) => {
+            json_str(&map, "path").map(|s| s.to_string()).unwrap_or_default()
+        }
+        _ => String::new(),
+    }
+}
+
+/// Take the first N lines of a string.
+fn preview_lines(s: &str, n: usize) -> String {
+    let lines: Vec<&str> = s.lines().take(n).collect();
+    lines.join("\n")
+}