Add Qwen Code support to convert.sh and install.sh

- Add convert_qwen() to scripts/convert.sh for generating Qwen SubAgent .md files
- Add install_qwen() to scripts/install.sh for installing to .qwen/agents/ (project-scoped)
- Add qwen detection, tool label, and install cases
- Update README.md with Qwen in supported tools table + usage section
- Add integrations/qwen/agents/ to .gitignore + create .gitkeep
- Add Qwen Code compatibility note to CONTRIBUTING.md
- Preserve tools: field in Qwen output when present in source agents
- Fix interactive installer to show dynamic [1-N] toggle range
- Update README roadmap checklist to include Qwen Code

Qwen SubAgents use minimal YAML frontmatter (name, description) with optional tools: field preserved from source. Body content passes through unchanged.
Tested with 120 agents — all convert and install successfully.

scripts/convert.sh

@@ -17,6 +17,7 @@
 #   aider        — Single CONVENTIONS.md for Aider
 #   windsurf     — Single .windsurfrules for Windsurf
 #   openclaw     — OpenClaw SOUL.md files (openclaw_workspace/<agent>/SOUL.md)
+#   qwen         — Qwen Code SubAgent files (~/.qwen/agents/*.md)
 #   all          — All tools (default)
 #
 # Output is written to integrations/<tool>/ relative to the repo root.
@@ -297,6 +298,41 @@ HEREDOC
   fi
 }
 
+convert_qwen() {
+  local file="$1"
+  local name description tools slug outfile body
+
+  name="$(get_field "name" "$file")"
+  description="$(get_field "description" "$file")"
+  tools="$(get_field "tools" "$file")"
+  slug="$(slugify "$name")"
+  body="$(get_body "$file")"
+
+  outfile="$OUT_DIR/qwen/agents/${slug}.md"
+  mkdir -p "$(dirname "$outfile")"
+
+  # Qwen Code SubAgent format: .md with YAML frontmatter in ~/.qwen/agents/
+  # name and description required; tools optional (only if present in source)
+  if [[ -n "$tools" ]]; then
+    cat > "$outfile" <<HEREDOC
+---
+name: ${slug}
+description: ${description}
+tools: ${tools}
+---
+${body}
+HEREDOC
+  else
+    cat > "$outfile" <<HEREDOC
+---
+name: ${slug}
+description: ${description}
+---
+${body}
+HEREDOC
+  fi
+}
+
 # Aider and Windsurf are single-file formats — accumulate into temp files
 # then write at the end.
 AIDER_TMP="$(mktemp)"
@@ -393,6 +429,7 @@ run_conversions() {
         opencode)    convert_opencode    "$file" ;;
         cursor)      convert_cursor      "$file" ;;
         openclaw)    convert_openclaw    "$file" ;;
+        qwen)        convert_qwen        "$file" ;;
         aider)       accumulate_aider    "$file" ;;
         windsurf)    accumulate_windsurf "$file" ;;
       esac
@@ -428,7 +465,7 @@ main() {
     esac
   done
 
-  local valid_tools=("antigravity" "gemini-cli" "opencode" "cursor" "aider" "windsurf" "openclaw" "all")
+  local valid_tools=("antigravity" "gemini-cli" "opencode" "cursor" "aider" "windsurf" "openclaw" "qwen" "all")
   local valid=false
   for t in "${valid_tools[@]}"; do [[ "$t" == "$tool" ]] && valid=true && break; done
   if ! $valid; then
@@ -444,7 +481,7 @@ main() {
 
   local tools_to_run=()
   if [[ "$tool" == "all" ]]; then
-    tools_to_run=("antigravity" "gemini-cli" "opencode" "cursor" "aider" "windsurf" "openclaw")
+    tools_to_run=("antigravity" "gemini-cli" "opencode" "cursor" "aider" "windsurf" "openclaw" "qwen")
   else
     tools_to_run=("$tool")
   fi