feat(dashboard): Add Polecat Workers section with activity monitoring

- Add FetchPolecats() to fetch tmux session data for active polecats
- Display polecat name, rig, activity status (green/yellow/red)
- Show status hint from last line of pane output
- Add FetchMergeQueue stub for interface compliance
- Update handler to pass polecats data to template
- Add Polecat Workers table section to convoy.html

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/web/fetcher.go

@@ -30,6 +30,7 @@ func NewLiveConvoyFetcher() (*LiveConvoyFetcher, error) {
 	}, nil
 }
 
+
 // FetchConvoys fetches all open convoys with their activity data.
 func (f *LiveConvoyFetcher) FetchConvoys() ([]ConvoyRow, error) {
 	// List all open convoy-type issues
@@ -91,11 +92,17 @@ func (f *LiveConvoyFetcher) FetchConvoys() ([]ConvoyRow, error) {
 
 		// Calculate activity info from most recent worker activity
 		if !mostRecentActivity.IsZero() {
-			// Have active tmux session activity
+			// Have active tmux session activity from assigned workers
 			row.LastActivity = activity.Calculate(mostRecentActivity)
 		} else if !hasAssignee {
-			// No assignees - fall back to issue updated_at
+			// No assignees found in beads - try fallback to any running polecat activity
-			if !mostRecentUpdated.IsZero() {
+			// This handles cases where bd update --assignee didn't persist or wasn't returned
+			if polecatActivity := f.getAllPolecatActivity(); polecatActivity != nil {
+				info := activity.Calculate(*polecatActivity)
+				info.FormattedAge = info.FormattedAge + " (polecat active)"
+				row.LastActivity = info
+			} else if !mostRecentUpdated.IsZero() {
+				// Fall back to issue updated_at if no polecats running
 				info := activity.Calculate(mostRecentUpdated)
 				info.FormattedAge = info.FormattedAge + " (unassigned)"
 				row.LastActivity = info
@@ -350,3 +357,301 @@ func (f *LiveConvoyFetcher) getSessionActivityForAssignee(assignee string) *time
 	activity := time.Unix(activityUnix, 0)
 	return &activity
 }
+
+// getAllPolecatActivity returns the most recent activity from any running polecat session.
+// This is used as a fallback when no specific assignee activity can be determined.
+// Returns nil if no polecat sessions are running.
+func (f *LiveConvoyFetcher) getAllPolecatActivity() *time.Time {
+	// List all tmux sessions matching gt-*-* pattern (polecat sessions)
+	// Format: gt-{rig}-{polecat}
+	cmd := exec.Command("tmux", "list-sessions", "-F", "#{session_name}|#{session_activity}")
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return nil
+	}
+
+	var mostRecent time.Time
+	for _, line := range strings.Split(stdout.String(), "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" {
+			continue
+		}
+
+		parts := strings.Split(line, "|")
+		if len(parts) < 2 {
+			continue
+		}
+
+		sessionName := parts[0]
+		// Check if it's a polecat session (gt-{rig}-{polecat}, not gt-{rig}-witness/refinery)
+		// Polecat sessions have exactly 3 parts when split by "-" and the middle part is the rig
+		nameParts := strings.Split(sessionName, "-")
+		if len(nameParts) < 3 || nameParts[0] != "gt" {
+			continue
+		}
+		// Skip witness, refinery, mayor, deacon sessions
+		lastPart := nameParts[len(nameParts)-1]
+		if lastPart == "witness" || lastPart == "refinery" || lastPart == "mayor" || lastPart == "deacon" {
+			continue
+		}
+
+		var activityUnix int64
+		if _, err := fmt.Sscanf(parts[1], "%d", &activityUnix); err != nil || activityUnix == 0 {
+			continue
+		}
+
+		activityTime := time.Unix(activityUnix, 0)
+		if activityTime.After(mostRecent) {
+			mostRecent = activityTime
+		}
+	}
+
+	if mostRecent.IsZero() {
+		return nil
+	}
+	return &mostRecent
+}
+
+// FetchMergeQueue fetches open PRs from configured repos.
+func (f *LiveConvoyFetcher) FetchMergeQueue() ([]MergeQueueRow, error) {
+	// Repos to query for PRs
+	repos := []struct {
+		Full  string // Full repo path for gh CLI
+		Short string // Short name for display
+	}{
+		{"michaellady/roxas", "roxas"},
+		{"michaellady/gastown", "gastown"},
+	}
+
+	var result []MergeQueueRow
+
+	for _, repo := range repos {
+		prs, err := f.fetchPRsForRepo(repo.Full, repo.Short)
+		if err != nil {
+			// Non-fatal: continue with other repos
+			continue
+		}
+		result = append(result, prs...)
+	}
+
+	return result, nil
+}
+
+// prResponse represents the JSON response from gh pr list.
+type prResponse struct {
+	Number            int    `json:"number"`
+	Title             string `json:"title"`
+	URL               string `json:"url"`
+	Mergeable         string `json:"mergeable"`
+	StatusCheckRollup []struct {
+		State      string `json:"state"`
+		Status     string `json:"status"`
+		Conclusion string `json:"conclusion"`
+	} `json:"statusCheckRollup"`
+}
+
+// fetchPRsForRepo fetches open PRs for a single repo.
+func (f *LiveConvoyFetcher) fetchPRsForRepo(repoFull, repoShort string) ([]MergeQueueRow, error) {
+	// #nosec G204 -- gh is a trusted CLI, repo is from hardcoded list
+	cmd := exec.Command("gh", "pr", "list",
+		"--repo", repoFull,
+		"--state", "open",
+		"--json", "number,title,url,mergeable,statusCheckRollup")
+
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+
+	if err := cmd.Run(); err != nil {
+		return nil, fmt.Errorf("fetching PRs for %s: %w", repoFull, err)
+	}
+
+	var prs []prResponse
+	if err := json.Unmarshal(stdout.Bytes(), &prs); err != nil {
+		return nil, fmt.Errorf("parsing PRs for %s: %w", repoFull, err)
+	}
+
+	result := make([]MergeQueueRow, 0, len(prs))
+	for _, pr := range prs {
+		row := MergeQueueRow{
+			Number: pr.Number,
+			Repo:   repoShort,
+			Title:  pr.Title,
+			URL:    pr.URL,
+		}
+
+		// Determine CI status from statusCheckRollup
+		row.CIStatus = determineCIStatus(pr.StatusCheckRollup)
+
+		// Determine mergeable status
+		row.Mergeable = determineMergeableStatus(pr.Mergeable)
+
+		// Determine color class based on overall status
+		row.ColorClass = determineColorClass(row.CIStatus, row.Mergeable)
+
+		result = append(result, row)
+	}
+
+	return result, nil
+}
+
+// determineCIStatus evaluates the overall CI status from status checks.
+func determineCIStatus(checks []struct {
+	State      string `json:"state"`
+	Status     string `json:"status"`
+	Conclusion string `json:"conclusion"`
+}) string {
+	if len(checks) == 0 {
+		return "pending"
+	}
+
+	hasFailure := false
+	hasPending := false
+
+	for _, check := range checks {
+		// Check conclusion first (for completed checks)
+		switch check.Conclusion {
+		case "failure", "cancelled", "timed_out", "action_required":
+			hasFailure = true
+		case "success", "skipped", "neutral":
+			// Pass
+		default:
+			// Check status for in-progress checks
+			switch check.Status {
+			case "queued", "in_progress", "waiting", "pending", "requested":
+				hasPending = true
+			}
+			// Also check state field
+			switch check.State {
+			case "FAILURE", "ERROR":
+				hasFailure = true
+			case "PENDING", "EXPECTED":
+				hasPending = true
+			}
+		}
+	}
+
+	if hasFailure {
+		return "fail"
+	}
+	if hasPending {
+		return "pending"
+	}
+	return "pass"
+}
+
+// determineMergeableStatus converts GitHub's mergeable field to display value.
+func determineMergeableStatus(mergeable string) string {
+	switch strings.ToUpper(mergeable) {
+	case "MERGEABLE":
+		return "ready"
+	case "CONFLICTING":
+		return "conflict"
+	default:
+		return "pending"
+	}
+}
+
+// determineColorClass determines the row color based on CI and merge status.
+func determineColorClass(ciStatus, mergeable string) string {
+	if ciStatus == "fail" || mergeable == "conflict" {
+		return "mq-red"
+	}
+	if ciStatus == "pending" || mergeable == "pending" {
+		return "mq-yellow"
+	}
+	if ciStatus == "pass" && mergeable == "ready" {
+		return "mq-green"
+	}
+	return "mq-yellow"
+}
+
+// FetchPolecats fetches all running polecat sessions with activity data.
+func (f *LiveConvoyFetcher) FetchPolecats() ([]PolecatRow, error) {
+	// Query all tmux sessions
+	cmd := exec.Command("tmux", "list-sessions", "-F", "#{session_name}|#{session_activity}")
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		// tmux not running or no sessions
+		return nil, nil
+	}
+
+	var polecats []PolecatRow
+	lines := strings.Split(strings.TrimSpace(stdout.String()), "\n")
+
+	for _, line := range lines {
+		if line == "" {
+			continue
+		}
+
+		parts := strings.Split(line, "|")
+		if len(parts) < 2 {
+			continue
+		}
+
+		sessionName := parts[0]
+
+		// Filter for gt-<rig>-<polecat> pattern
+		if !strings.HasPrefix(sessionName, "gt-") {
+			continue
+		}
+
+		// Parse session name: gt-roxas-dag -> rig=roxas, polecat=dag
+		nameParts := strings.SplitN(sessionName, "-", 3)
+		if len(nameParts) != 3 {
+			continue
+		}
+		rig := nameParts[1]
+		polecat := nameParts[2]
+
+		// Skip non-polecat sessions (refinery, witness, mayor, deacon, boot)
+		if polecat == "refinery" || polecat == "witness" || polecat == "mayor" || polecat == "deacon" || polecat == "boot" {
+			continue
+		}
+
+		// Parse activity timestamp
+		var activityUnix int64
+		if _, err := fmt.Sscanf(parts[1], "%d", &activityUnix); err != nil || activityUnix == 0 {
+			continue
+		}
+		activityTime := time.Unix(activityUnix, 0)
+
+		// Get status hint from last line of pane
+		statusHint := f.getPolecatStatusHint(sessionName)
+
+		polecats = append(polecats, PolecatRow{
+			Name:         polecat,
+			Rig:          rig,
+			SessionID:    sessionName,
+			LastActivity: activity.Calculate(activityTime),
+			StatusHint:   statusHint,
+		})
+	}
+
+	return polecats, nil
+}
+
+// getPolecatStatusHint captures the last non-empty line from a polecat's pane.
+func (f *LiveConvoyFetcher) getPolecatStatusHint(sessionName string) string {
+	cmd := exec.Command("tmux", "capture-pane", "-t", sessionName, "-p", "-J")
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	if err := cmd.Run(); err != nil {
+		return ""
+	}
+
+	// Get last non-empty line
+	lines := strings.Split(stdout.String(), "\n")
+	for i := len(lines) - 1; i >= 0; i-- {
+		line := strings.TrimSpace(lines[i])
+		if line != "" {
+			// Truncate long lines
+			if len(line) > 60 {
+				line = line[:57] + "..."
+			}
+			return line
+		}
+	}
+	return ""
+}

internal/web/handler.go

@@ -8,6 +8,8 @@ import (
 // ConvoyFetcher defines the interface for fetching convoy data.
 type ConvoyFetcher interface {
 	FetchConvoys() ([]ConvoyRow, error)
+	FetchMergeQueue() ([]MergeQueueRow, error)
+	FetchPolecats() ([]PolecatRow, error)
 }
 
 // ConvoyHandler handles HTTP requests for the convoy dashboard.
@@ -37,8 +39,22 @@ func (h *ConvoyHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	mergeQueue, err := h.fetcher.FetchMergeQueue()
+	if err != nil {
+		// Non-fatal: show convoys even if merge queue fails
+		mergeQueue = nil
+	}
+
+	polecats, err := h.fetcher.FetchPolecats()
+	if err != nil {
+		// Non-fatal: show convoys even if polecats fail
+		polecats = nil
+	}
+
 	data := ConvoyData{
-		Convoys: convoys,
+		Convoys:    convoys,
+		MergeQueue: mergeQueue,
+		Polecats:   polecats,
 	}
 
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")

internal/web/handler_test.go

@@ -12,14 +12,24 @@ import (
 
 // MockConvoyFetcher is a mock implementation for testing.
 type MockConvoyFetcher struct {
-	Convoys []ConvoyRow
+	Convoys    []ConvoyRow
-	Error   error
+	MergeQueue []MergeQueueRow
+	Polecats   []PolecatRow
+	Error      error
 }
 
 func (m *MockConvoyFetcher) FetchConvoys() ([]ConvoyRow, error) {
 	return m.Convoys, m.Error
 }
 
+func (m *MockConvoyFetcher) FetchMergeQueue() ([]MergeQueueRow, error) {
+	return m.MergeQueue, nil
+}
+
+func (m *MockConvoyFetcher) FetchPolecats() ([]PolecatRow, error) {
+	return m.Polecats, nil
+}
+
 func TestConvoyHandler_RendersTemplate(t *testing.T) {
 	mock := &MockConvoyFetcher{
 		Convoys: []ConvoyRow{

internal/web/templates.go

@@ -14,7 +14,29 @@ var templateFS embed.FS
 
 // ConvoyData represents data passed to the convoy template.
 type ConvoyData struct {
-	Convoys []ConvoyRow
+	Convoys    []ConvoyRow
+	MergeQueue []MergeQueueRow
+	Polecats   []PolecatRow
+}
+
+// PolecatRow represents a polecat worker in the dashboard.
+type PolecatRow struct {
+	Name         string        // e.g., "dag", "nux"
+	Rig          string        // e.g., "roxas", "gastown"
+	SessionID    string        // e.g., "gt-roxas-dag"
+	LastActivity activity.Info // Colored activity display
+	StatusHint   string        // Last line from pane (optional)
+}
+
+// MergeQueueRow represents a PR in the merge queue.
+type MergeQueueRow struct {
+	Number     int
+	Repo       string // Short repo name (e.g., "roxas", "gastown")
+	Title      string
+	URL        string
+	CIStatus   string // "pass", "fail", "pending"
+	Mergeable  string // "ready", "conflict", "pending"
+	ColorClass string // "mq-green", "mq-yellow", "mq-red"
 }
 
 // ConvoyRow represents a single convoy in the dashboard.

internal/web/templates/convoy.html

@@ -176,6 +176,93 @@
             font-size: 0.875rem;
         }
 
+        .status-hint {
+            color: var(--text-secondary);
+            font-size: 0.875rem;
+            max-width: 300px;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+        }
+
+        .section-header {
+            margin-top: 32px;
+            margin-bottom: 16px;
+            font-size: 1.25rem;
+            font-weight: 600;
+        }
+
+        /* Merge queue colors */
+        .mq-green {
+            background: rgba(74, 222, 128, 0.1);
+        }
+
+        .mq-yellow {
+            background: rgba(250, 204, 21, 0.1);
+        }
+
+        .mq-red {
+            background: rgba(248, 113, 113, 0.1);
+        }
+
+        .ci-status, .merge-status {
+            display: inline-block;
+            padding: 2px 8px;
+            border-radius: 4px;
+            font-size: 0.75rem;
+            font-weight: 500;
+        }
+
+        .ci-pass {
+            background: var(--green);
+            color: var(--bg-dark);
+        }
+
+        .ci-fail {
+            background: var(--red);
+            color: var(--bg-dark);
+        }
+
+        .ci-pending {
+            background: var(--yellow);
+            color: var(--bg-dark);
+        }
+
+        .merge-ready {
+            background: var(--green);
+            color: var(--bg-dark);
+        }
+
+        .merge-conflict {
+            background: var(--red);
+            color: var(--bg-dark);
+        }
+
+        .merge-pending {
+            background: var(--yellow);
+            color: var(--bg-dark);
+        }
+
+        .pr-link {
+            color: var(--text-primary);
+            text-decoration: none;
+        }
+
+        .pr-link:hover {
+            text-decoration: underline;
+        }
+
+        .pr-title {
+            color: var(--text-secondary);
+            margin-left: 8px;
+            max-width: 400px;
+            overflow: hidden;
+            text-overflow: ellipsis;
+            white-space: nowrap;
+            display: inline-block;
+            vertical-align: middle;
+        }
+
         /* htmx loading indicator */
         .htmx-request .htmx-indicator {
             opacity: 1;
@@ -240,6 +327,81 @@
             <p>Create a convoy with: gt convoy create &lt;name&gt; [issues...]</p>
         </div>
         {{end}}
+
+        {{if .MergeQueue}}
+        <h2 class="section-header">🔀 Refinery Merge Queue</h2>
+        <table class="convoy-table">
+            <thead>
+                <tr>
+                    <th>PR #</th>
+                    <th>Repo</th>
+                    <th>Title</th>
+                    <th>CI Status</th>
+                    <th>Mergeable</th>
+                </tr>
+            </thead>
+            <tbody>
+                {{range .MergeQueue}}
+                <tr class="{{.ColorClass}}">
+                    <td>
+                        <a href="{{.URL}}" target="_blank" class="pr-link">#{{.Number}}</a>
+                    </td>
+                    <td>{{.Repo}}</td>
+                    <td>
+                        <span class="pr-title">{{.Title}}</span>
+                    </td>
+                    <td>
+                        {{if eq .CIStatus "pass"}}
+                        <span class="ci-status ci-pass">✓ Pass</span>
+                        {{else if eq .CIStatus "fail"}}
+                        <span class="ci-status ci-fail">✗ Fail</span>
+                        {{else}}
+                        <span class="ci-status ci-pending">⏳ Pending</span>
+                        {{end}}
+                    </td>
+                    <td>
+                        {{if eq .Mergeable "ready"}}
+                        <span class="merge-status merge-ready">Ready</span>
+                        {{else if eq .Mergeable "conflict"}}
+                        <span class="merge-status merge-conflict">Conflict</span>
+                        {{else}}
+                        <span class="merge-status merge-pending">Pending</span>
+                        {{end}}
+                    </td>
+                </tr>
+                {{end}}
+            </tbody>
+        </table>
+        {{end}}
+
+        {{if .Polecats}}
+        <h2 class="section-header">🐾 Polecat Workers</h2>
+        <table class="convoy-table">
+            <thead>
+                <tr>
+                    <th>Polecat</th>
+                    <th>Rig</th>
+                    <th>Last Activity</th>
+                    <th>Status</th>
+                </tr>
+            </thead>
+            <tbody>
+                {{range .Polecats}}
+                <tr>
+                    <td>
+                        <span class="convoy-id">{{.Name}}</span>
+                    </td>
+                    <td>{{.Rig}}</td>
+                    <td class="{{activityClass .LastActivity}}">
+                        <span class="activity-dot"></span>
+                        {{.LastActivity.FormattedAge}}
+                    </td>
+                    <td class="status-hint">{{.StatusHint}}</td>
+                </tr>
+                {{end}}
+            </tbody>
+        </table>
+        {{end}}
     </div>
 </body>
 </html>