Manage vault notes: list, read, create, update, delete, stat, create_from_template. Operates on .md files in the markdown vault.

Edit notes. Single mode: provide path, operation, content. Batch mode: provide operations array (max 50, sequential, stops on first error). AST ops (append/prepend/replace) target headings or block IDs with fuzzy matching. Freeform ops (line_replace/string_replace) for line range or literal string. frontmatter_set merges YAML. dryRun=true previews as unified diff without writing.

Read and search markdown notes. Vault scope: general markdown notes vault. Actions: search (heading-aware fragment retrieval with TF-IDF + proximity), semantic_search (vector + lexical hybrid for conceptual queries), global_search (cross-vault exact-match grep), outline (file or directory structure tree), read (full file or single section by heading), frontmatter_get (parse YAML frontmatter), bulk_read (read multiple files/headings in one call), backlinks (find all notes linking to a given path).

Manage agent workflow state: check status, fire transitions, view history, or reset. Based on a Petri net state machine.

System administration: check status, get indexing info, vault structure overview, and manage the server.