feat: add sitrep-panel skill

Live local HTML progress report (status board, running narrative,
screenshots, newest-first log) served on localhost via a stdlib-only
Python server, so a human can watch a long/delegated agent task
without reading the raw transcript. Adapted from dbl8005/sitrep-panel
(MIT), evaluated and drafted via Codex per this fleet's standard
skill-candidate review process. Bundled server and HTML template
copied unmodified from upstream.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

skills/sitrep-panel/support/scripts/serve.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+"""Serve a sitrep-panel report directory on a free localhost port.
+
+Usage: python3 serve.py <directory> [preferred_port]
+
+Prints exactly one line to stdout on success: `SERVING http://localhost:<port>/`
+then blocks, running the HTTP server — launch this with the caller's
+background/detached mechanism (e.g. Claude Code's Bash tool with
+run_in_background: true). Stdlib only, no dependencies.
+"""
+
+from __future__ import annotations
+
+import functools
+import http.server
+import sys
+
+
+class QuietHandler(http.server.SimpleHTTPRequestHandler):
+    """SimpleHTTPRequestHandler that suppresses per-request access logging,
+    so stdout stays to the one clean SERVING line callers parse."""
+
+    def log_message(self, format: str, *args: object) -> None:  # noqa: A002
+        pass
+
+
+def main() -> None:
+    if len(sys.argv) < 2:
+        print("usage: serve.py <directory> [preferred_port]", file=sys.stderr)
+        sys.exit(1)
+
+    directory = sys.argv[1]
+    preferred_port = int(sys.argv[2]) if len(sys.argv) > 2 else 8934
+    handler = functools.partial(QuietHandler, directory=directory)
+
+    try:
+        httpd = http.server.ThreadingHTTPServer(("127.0.0.1", preferred_port), handler)
+    except OSError:
+        # Preferred port is taken — let the OS assign a free one rather than
+        # guessing and racing another process for it.
+        httpd = http.server.ThreadingHTTPServer(("127.0.0.1", 0), handler)
+
+    port = httpd.server_address[1]
+    print(f"SERVING http://localhost:{port}/", flush=True)
+    httpd.serve_forever()
+
+
+if __name__ == "__main__":
+    main()