Manuka is an open-source intelligence (OSINT) honeypot designed to monitor reconnaissance attempts by threat actors during the early stages of the cyber kill chain. The tool creates a simulated environment consisting of staged OSINT sources, including social media profiles and leaked credentials, to attract and track adversary interest. It focuses specifically on detecting threats at Stage 1 (Reconnaissance) of the cyber kill chain, providing visibility into pre-attack activities that traditional network-focused honeypots typically miss. Manuka aligns with MITRE's PRE-ATT&CK framework and generates actionable intelligence for blue teams by monitoring signs of adversary reconnaissance. The platform tracks various OSINT-based attack vectors, such as exposed corporate meetings, therapy sessions, and educational content that can be discovered through simple web searches. The honeypot generates early-warning signals for defenders by detecting when threat actors are gathering intelligence about an organization through publicly available sources. This approach helps security teams identify potential threats before attackers progress to more advanced stages of the attack lifecycle. Manuka provides real-time insights into reconnaissance activities, enabling organizations to understand how adversaries might be profiling their digital footprint and exposed assets through open-source intelligence gathering techniques.