# Sierra Echo Charlie Open Data

> Index of the subsites at data.sierraechocharlie.com. Each subsite maintains its own agent guide with data sources, formats and access instructions.

## Subsites

- [Microsoft vulnerability review](/msft-patching/llms.txt): agent guide for the vulnerability triage and attribution research dashboard at /msft-patching/.

- [PHP2Shell detection opportunities](/php-shell-rules/llms.txt): potential detections for CVE-2026-109618 and CVE-2026-109619, 38 referenced indicators and 10 behavioral opportunities, investigation queries, memory-error signatures and a browser-local tester at /php-shell-rules/.