From 16e0964ce3a68e8b4fabfe24019ba9f1fc2cc140 Mon Sep 17 00:00:00 2001
From: onevcat <wei.wang@linecorp.com>
Date: Fri, 21 Aug 2026 17:33:58 +0900
Subject: [PATCH] fix(detection): keep queued-message body paragraphs in the
 Claude live block
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A queued "❯" message containing a blank line renders its trailing
paragraph as an unmarked prose row: claudeLogicalRows treats the blank
line as a row terminator, so the paragraph detaches from its head. The
bottom-up shape scan ended the live block at that row, demoted the
spinner above it to history, and a working agent read as idle until the
queue drained.

Body paragraphs hang directly under their "❯" head, so the scan now
keeps a prose run only when the first row-starting or chrome row above
it is a queued head. A "⏺" block, a border, or non-queued chrome such
as a quoted spinner still ends the block, so transcript-quoted status
rows stay history.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 .../AgentDetection/ClaudeScreenProfile.swift  | 29 +++++++++++++++--
 supacodeTests/ClaudeScreenProfileTests.swift  | 32 +++++++++++++++++++
 2 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/supacode/Infrastructure/AgentDetection/ClaudeScreenProfile.swift b/supacode/Infrastructure/AgentDetection/ClaudeScreenProfile.swift
index af1123e2..ca7bbaed 100644
--- a/supacode/Infrastructure/AgentDetection/ClaudeScreenProfile.swift
+++ b/supacode/Infrastructure/AgentDetection/ClaudeScreenProfile.swift
@@ -232,12 +232,37 @@ private struct ClaudeScreenRegions: Sendable {
 
   nonisolated private static func liveStatusBlock(_ rows: [String]) -> ArraySlice<String> {
     var start = rows.endIndex
-    while start > rows.startIndex, isClaudeLiveChromeRow(rows[start - 1]) {
-      start -= 1
+    while start > rows.startIndex {
+      if isClaudeLiveChromeRow(rows[start - 1]) {
+        start -= 1
+        continue
+      }
+      guard let head = queuedMessageHeadIndex(above: start - 1, in: rows) else { break }
+      start = head
     }
     return rows[start...]
   }
 
+  // A prose row sits inside the live block only as a queued-message body
+  // paragraph: a blank line inside a queued "❯" message detaches the paragraph
+  // from its head row, so it surfaces as an unmarked row and would otherwise
+  // end the block, demoting the spinner above to history while the agent is
+  // still working. Body paragraphs hang directly under their head, so the
+  // prose run counts as queued body only when the first row-starting or
+  // chrome row above it is a "❯" head. Anything else on top — a "⏺" block, a
+  // border, or non-queued chrome such as a quoted spinner — means the prose
+  // is transcript text, which still ends the block.
+  nonisolated private static func queuedMessageHeadIndex(above proseIndex: Int, in rows: [String]) -> Int? {
+    var index = proseIndex
+    while index > rows.startIndex {
+      let row = rows[index - 1]
+      if row.first == "❯" { return index - 1 }
+      if isClaudeLiveChromeRow(row) || claudeRowStartsNewRow(row) { return nil }
+      index -= 1
+    }
+    return nil
+  }
+
   nonisolated private static func currentInteractionLines(
     screenLines: [String],
     promptIndex: Int?
diff --git a/supacodeTests/ClaudeScreenProfileTests.swift b/supacodeTests/ClaudeScreenProfileTests.swift
index de67816d..11ffa225 100644
--- a/supacodeTests/ClaudeScreenProfileTests.swift
+++ b/supacodeTests/ClaudeScreenProfileTests.swift
@@ -172,6 +172,38 @@ struct ClaudeScreenProfileTests {
     #expect(detection.reason == .matched(ClaudeScreenProfile.RuleID.spinner))
   }
 
+  @Test func spinnerAboveQueuedMessageWithBlankLineStaysWorking() {
+    // Live capture: a queued "❯" message whose body contains a blank line
+    // renders its trailing paragraph as an unmarked prose row. The bottom-up
+    // shape scan must not end the live block there — the paragraph still
+    // belongs to the queued block, and stopping demoted the spinner above it
+    // to history, so a working agent read as idle.
+    let text = """
+      ⏺ Waiting for a new run to appear on the poc repo · 2m 35s
+        ⎿  $ until gh api "repos/acme/poc/actions/runs" >/dev/null; do sleep 5; done (2m 35s)
+           (ctrl+b to run in background)
+
+      ✻ Combobulating… (14m 4s · ↓ 141.9k tokens)
+
+        ❯ https://example.com/acme/poc/actions/runs/18352009
+
+          这个是你发的么
+        ❯ https://example.com/acme/poc/actions/runs/18352094
+          还有这个
+
+      ──────────────────────────────────────────
+      ❯ Press up to edit queued messages
+      ──────────────────────────────────────────
+        ✓ Bash ×18 | ✓ Edit ×1
+        ⏵⏵ bypass permissions on (shift+tab to cycle) · ← for agents
+      """
+
+    let detection = DetectedAgent.claude.detectScreen(in: text)
+
+    #expect(detection.state == .working)
+    #expect(detection.reason == .matched(ClaudeScreenProfile.RuleID.spinner))
+  }
+
   @Test func spinnerQuotedAboveTranscriptBlockStaysIdle() {
     // A status row quoted in the transcript sits above a "⏺" block head. The
     // live block scan stops at that head, so reading the full active screen
-- 
2.51.2