Search and read documents, repos, URLs, and other resources stored in OpenViking under viking://resources/. Use whenever the user asks about docs, specs, codebases, papers, or notes that were added to OpenViking ("check the docs", "what does our design doc say", "find it in OpenViking"), or when a task needs reference material this session does not have. Covers picking between find, grep, glob, and list, and drilling from a hit down to the exact file.