Initial release: full Arma 3 mod management toolchain

Pipeline: parse HTML presets, compare modlists, download from Caddy
file server, create junctions/symlinks to Arma 3 Server directory.
Includes update/sync flows, missing-mod reporting, OS compat layer,
shared config, dep checker, comprehensive test suite (71 tests).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

report_missing.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""
+CLI entry point: cross-reference comparison.json against the file server and
+report which required mods are missing.
+
+Usage:
+    python report_missing.py
+"""
+
+import json
+import sys
+
+from arma_modlist_tools.compat import fix_console_encoding
+from arma_modlist_tools.config import load_config
+from arma_modlist_tools.fetcher import build_server_index
+from arma_modlist_tools.reporter import build_missing_report, save_missing_report
+
+fix_console_encoding()
+
+
+def main() -> None:
+    cfg = load_config()
+
+    if not cfg.comparison.exists():
+        print(f"ERROR: {cfg.comparison} not found. Run compare_modlists.py first.")
+        sys.exit(1)
+
+    comparison = json.loads(cfg.comparison.read_text(encoding="utf-8"))
+    total_mods = (
+        comparison["shared"]["mod_count"]
+        + sum(d["mod_count"] for d in comparison["unique"].values())
+    )
+
+    # ---- Build server index ----
+    print(f"\nChecking server index...")
+    index = build_server_index(cfg.server_url, cfg.server_auth)
+    print(f"  {len(index['by_steam_id'])} mods indexed\n")
+
+    # ---- Build report ----
+    print(f"Cross-referencing {total_mods} required mods...")
+    report = build_missing_report(comparison, index)
+    save_missing_report(report, cfg.missing_report)
+
+    # ---- Print table ----
+    missing = report["missing_mods"]
+    if missing:
+        print(f"\n  Missing from server ({len(missing)}):\n")
+        print(f"  {'steam_id':<14}  {'Group':<28}  Name")
+        print(f"  {'-'*14}  {'-'*28}  {'-'*40}")
+        for m in missing:
+            sid   = m["steam_id"] or "---"
+            group = m["group"]
+            print(f"  {sid:<14}  {group:<28}  {m['name']}")
+    else:
+        print("\n  All required mods are on the server.")
+
+    print()
+    print(f"  {report['on_server']} / {report['total_mods']} found on server")
+    print(f"  Report saved: {cfg.missing_report}")
+    print()
+
+
+if __name__ == "__main__":
+    main()