Knowledge and code

DevHub answers two different questions in two different places.

Notes in a vault hold what is not obvious from the code: decisions, rules, how a feature should behave and why, verified fixes. An agent asks them with knowledge_search, reads one with vault_file_read and finds a note by a word with vault_files_search. Business Context is the same search for you.

The Repository Index reads a folder’s code and keeps symbols and their relations. An agent asks it with tools such as repo_symbol_search, repo_callers and repo_impact, which tell where a function is, who calls it and what a change would break. The index is built for each MCP folder; see Organizations and projects.

For how something behaves and why, ask the vault first. For where something is and what depends on it, ask the index. If the two disagree, the code shows what is true now; the note should then be corrected.

Put the notes and symbols it needs in the AI Context queue, and the agent takes them in one call at the start of a task.

• Vaults
• Catalog of DevHub tools