lines: [" tool: read ", "patch applied", "tests done"],

formatLine: (line) => `\`${line}\``,

}),

).toBe("Shelling\n• `patch applied`\n• `tests done`");

).toBe("• `patch applied`\n• `tests done`");

expect(

formatChannelProgressDraftText({

entry,

lines: ["🛠️ Exec", "plain update"],

}),

).toBe("Shelling\n🛠️ Exec\n• plain update");

).toBe("🛠️ Exec\n• plain update");

});

it("preserves progress labels above rolling lines", () => {

it("renders progress labels as rolling lines", () => {

const entry = { streaming: { progress: { label: "Shelling", maxLines: 3 } } };

expect(

formatChannelProgressDraftText({

entry,

lines: ["🛠️ Exec", "📖 Read", "🩹 Patch"],

}),

).toBe("Shelling\n🛠️ Exec\n📖 Read\n🩹 Patch");

).toBe("🛠️ Exec\n📖 Read\n🩹 Patch");

});

it("renders structured progress lines with compact details", () => {

const maxLines = resolveChannelProgressDraftMaxLines(params.entry);

const formatLine = params.formatLine ?? ((line: string) => line);

const bullet = params.bullet ?? "•";

const progressLines = params.lines

const rawLines: Array<string | ChannelProgressDraftLine | { draftLabel: string }> = label

? [{ draftLabel: label }, ...params.lines]

: params.lines;

const lines = rawLines

.map((line) => {

const rawText = typeof line === "string" ? line : getProgressDraftLineText(line);

const isLabelLine = typeof line === "object" && line !== null && "draftLabel" in line;

const rawText = isLabelLine

? line.draftLabel

: typeof line === "string"

? line

: getProgressDraftLineText(line);

const text = compactChannelProgressDraftLine(rawText, DEFAULT_PROGRESS_DRAFT_MAX_LINE_CHARS);

return text ? { text, isLabelLine: false } : undefined;

return text ? { text, isLabelLine } : undefined;

})

.filter((line): line is { text: string; isLabelLine: boolean } => Boolean(line))

.slice(-maxLines)

.map(({ text }) => {

const formatted = formatLine(text);

return shouldPrefixProgressLine(text) ? `${bullet} ${formatted}` : formatted;

.map(({ text, isLabelLine }) => {

const formatted = isLabelLine ? text : formatLine(text);

return !isLabelLine && shouldPrefixProgressLine(text) ? `${bullet} ${formatted}` : formatted;

});

const labelLine = label

? compactChannelProgressDraftLine(label, DEFAULT_PROGRESS_DRAFT_MAX_LINE_CHARS)

: "";

const lines = [...(labelLine ? [labelLine] : []), ...progressLines];

return lines.filter((line): line is string => Boolean(line)).join("\n");

}