Add BD_AGENT_MODE for ultra-compact output

Adds agent-optimized output mode for `bd list` triggered by:
- BD_AGENT_MODE=1 environment variable (explicit)
- CLAUDE_CODE environment variable (auto-detect)

Agent mode provides:
- Ultra-compact format: just "ID: Title" per line
- Lower default limit (20 vs 50) for context efficiency
- No colors, no emojis, no pager
- Defaults to open/in_progress only (existing behavior)

(bd-x2ht)

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

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

cmd/bd/list.go

@@ -333,6 +333,12 @@ func formatIssueLong(buf *strings.Builder, issue *types.Issue, labels []string)
 	buf.WriteString("\n")
 }
 
+// formatAgentIssue formats a single issue in ultra-compact agent mode format
+// Output: just "ID: Title" - no colors, no emojis, no brackets
+func formatAgentIssue(buf *strings.Builder, issue *types.Issue) {
+	buf.WriteString(fmt.Sprintf("%s: %s\n", issue.ID, issue.Title))
+}
+
 // formatIssueCompact formats a single issue in compact format to a buffer
 func formatIssueCompact(buf *strings.Builder, issue *types.Issue, labels []string) {
 	labelsStr := ""
@@ -451,9 +457,12 @@ var listCmd = &cobra.Command{
 
 		// Handle limit: --limit 0 means unlimited (explicit override)
 		// Otherwise use the value (default 50 or user-specified)
+		// Agent mode uses lower default (20) for context efficiency
 		effectiveLimit := limit
 		if cmd.Flags().Changed("limit") && limit == 0 {
 			effectiveLimit = 0 // Explicit unlimited
+		} else if !cmd.Flags().Changed("limit") && ui.IsAgentMode() {
+			effectiveLimit = 20 // Agent mode default
 		}
 
 		filter := types.IssueFilter{
@@ -743,7 +752,14 @@ var listCmd = &cobra.Command{
 
 			// Build output in buffer for pager support (bd-jdz3)
 			var buf strings.Builder
-			if longFormat {
+			if ui.IsAgentMode() {
+				// Agent mode: ultra-compact, no colors, no pager
+				for _, issue := range issues {
+					formatAgentIssue(&buf, issue)
+				}
+				fmt.Print(buf.String())
+				return
+			} else if longFormat {
 				// Long format: multi-line with details
 				buf.WriteString(fmt.Sprintf("\nFound %d issues:\n\n", len(issues)))
 				for _, issue := range issues {
@@ -859,7 +875,14 @@ var listCmd = &cobra.Command{
 
 		// Build output in buffer for pager support (bd-jdz3)
 		var buf strings.Builder
-		if longFormat {
+		if ui.IsAgentMode() {
+			// Agent mode: ultra-compact, no colors, no pager
+			for _, issue := range issues {
+				formatAgentIssue(&buf, issue)
+			}
+			fmt.Print(buf.String())
+			return
+		} else if longFormat {
 			// Long format: multi-line with details
 			buf.WriteString(fmt.Sprintf("\nFound %d issues:\n\n", len(issues)))
 			for _, issue := range issues {

internal/ui/styles.go

@@ -4,6 +4,7 @@ package ui
 
 import (
 	"fmt"
+	"os"
 	"strings"
 
 	"github.com/charmbracelet/lipgloss"
@@ -17,6 +18,23 @@ func init() {
 	}
 }
 
+// IsAgentMode returns true if the CLI is running in agent-optimized mode.
+// This is triggered by:
+//   - BD_AGENT_MODE=1 environment variable (explicit)
+//   - CLAUDE_CODE environment variable (auto-detect Claude Code)
+//
+// Agent mode provides ultra-compact output optimized for LLM context windows.
+func IsAgentMode() bool {
+	if os.Getenv("BD_AGENT_MODE") == "1" {
+		return true
+	}
+	// Auto-detect Claude Code environment
+	if os.Getenv("CLAUDE_CODE") != "" {
+		return true
+	}
+	return false
+}
+
 // Ayu theme color palette
 // Dark: https://terminalcolors.com/themes/ayu/dark/
 // Light: https://terminalcolors.com/themes/ayu/light/

internal/ui/styles_test.go

@@ -152,3 +152,26 @@ func TestRenderCommandAndCategoryAreUppercaseSafe(t *testing.T) {
 		t.Fatalf("command output missing text: %q", cmd)
 	}
 }
+
+func TestIsAgentMode(t *testing.T) {
+	// Test default (no env vars) - t.Setenv automatically restores after test
+	t.Setenv("BD_AGENT_MODE", "")
+	t.Setenv("CLAUDE_CODE", "")
+	if IsAgentMode() {
+		t.Fatal("expected false with no env vars")
+	}
+
+	// Test BD_AGENT_MODE=1
+	t.Setenv("BD_AGENT_MODE", "1")
+	t.Setenv("CLAUDE_CODE", "")
+	if !IsAgentMode() {
+		t.Fatal("expected true with BD_AGENT_MODE=1")
+	}
+
+	// Test CLAUDE_CODE auto-detection
+	t.Setenv("BD_AGENT_MODE", "")
+	t.Setenv("CLAUDE_CODE", "something")
+	if !IsAgentMode() {
+		t.Fatal("expected true with CLAUDE_CODE set")
+	}
+}