Raven

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A CLI for knowledge management with first-class support for LLM agents.

Raven adds a few features on top of markdown:

• A lightweight schema for defining types
• Syntax for annotating content inline with traits
• Bidirectional linking

And enables precise retrieval and powerful workflows with:

• A full-featured CLI for interacting with your notes
• An efficient query language
• First-class agent support

Everything stays local in plain text files.

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Table of Contents

• Installation
• Example Usage
• Agent Setup
• Vault Structure
• Core Concepts
  • Types
  • Traits
  • References
• Creating Objects
• Querying
• Workflows
• Documentation

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Installation

Install with Homebrew:

brew tap aidanlsb/tap
brew install aidanlsb/tap/rvn
rvn version

Or install with Go:

go install github.com/aidanlsb/raven/cmd/rvn@latest
rvn version

Quickstart

rvn init my-vault
cd my-vault
rvn new project "My First Project" --field status=active
rvn query "object:project .status==active"

This creates:

• schema.yaml — type and trait definitions
• raven.yaml — vault configuration and saved queries
• .raven/ — index and internal state (disposable, rebuildable)

Requires Go 1.23+. See Install Go.

Raven is an early-stage project and subject to change.

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Example Usage

Hermod (Odin's messenger in Norse mythology and PKM enthusiast for this walkthrough) tracks three things: projects that need resolution, people involved, and meetings where words become binding.

He uses Raven to keep it all straight. Types project, person, and meeting each map to a folder of markdown files with yaml frontmatter for fields. Traits @todo and @decision are inline annotations that make content queryable. The rest is just markdown.

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Starting the day

Each morning, Hermod opens his daily note:

rvn daily

This creates and opens daily/2026-01-17.md — a running log for the day.

---
type: date
---

# Saturday

@todo Bring the terms to Vanaheim before the new moon
@todo Follow up with Skirnir on his contacts there

Still waiting to hear back from Odin.

Creating the project

A diplomatic mission to Vanaheim is taking shape. Hermod opens a project to track it:

rvn new project vanaheim-embassy --field status=active

This creates project/vanaheim-embassy.md with status: active in the frontmatter and the rest free for notes.

Adding people

Two names will recur. Skírnir has dealt with Vanaheim before; Forseti must approve any terms that touch on old grievances:

rvn new person skirnir --field realm=asgard --field role=envoy
rvn new person forseti --field realm=asgard --field role=arbiter

Now [[person/skirnir]] and [[person/forseti]] can be used as references anywhere in Hermod's notes, which link back to their own pages.

Recording the meeting

After the council, Hermod writes up the meeting:

---
type: meeting
date: 2026-01-17
project: [[project/vanaheim-embassy]]
---

# Council at Glaðsheim

[[person/skirnir]] reports that Vanaheim is willing to negotiate, but wants concessions

[[person/forseti]] warns this may reopen an older land dispute.

@todo Bring the terms to Odin and await his decision
@todo Confirm Forseti has reviewed the old grievances

@decision No commitments until Odin speaks.

The traits @todo and @decision make the content of Hermod's note queryable, and the references connect this meeting to the people and project involved.

Querying what's open

Days later, Hermod checks what remains unresolved from meetings linked to the Vanaheim embassy:

rvn query "trait:todo within(object:meeting .project==vanaheim-embassy)"

meeting/2026-01-17-council-gladsheim.md
  @todo Bring the terms to Odin and await his decision
  @todo Confirm Forseti has reviewed the old grievances

Two open threads, both traceable to the meeting they came from.

Reviewing references

Skírnir arrives at Hermod's hall with news. Before they speak, Hermod pulls up everything connected to him:

rvn backlinks skirnir

meeting/2026-01-17-council-gladsheim.md
  [[person/skirnir]] reports that Vanaheim is willing to negotiate

meeting/2026-01-08-vanaheim-embassy.md
  [[person/skirnir]] negotiated the terms with Freyr's blessing

project/vanaheim-embassy.md
  Prior contact: [[person/skirnir]]

Everything Hermod has ever written about Skírnir, pulled up in one command.

Asking an agent

Odin summons him. Before the meeting, Hermod asks his agent:

"What should I report on the Vanaheim matter?"

The agent calls Raven's MCP tools — querying open todos, recent meetings, and decisions linked to the project — and returns a synthesis:

Two open todos from the council meeting on Jan 17. Vanaheim wants concessions on the eastern trade routes — no commitment has been made yet (@decision). Forseti's review of old grievances is still outstanding. Bottom line: one blocker before Odin can decide.

The agent doesn't need to search or guess — it queries structured data and reasons over what it finds.

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Agent Setup

Raven is designed to work with LLM agents. The MCP server exposes every Raven command as a tool.

MCP Setup (Claude Code, Claude Desktop, Cursor)

Install Raven into your MCP client config with one command:

rvn mcp install --client claude-desktop --vault-path /path/to/your/vault

You can also target other supported clients:

rvn mcp install --client claude-code --vault-path /path/to/your/vault
rvn mcp install --client cursor --vault-path /path/to/your/vault

Check installation status across all clients:

rvn mcp status

For unsupported clients or fully manual setup, print the JSON snippet:

rvn mcp show --vault-path /path/to/your/vault

Once connected, ask the agent:

"Help me set up my Raven vault"

The agent will walk through schema creation, creating your first objects, and learning the query language — all through conversation.

See the full MCP reference for configuration options and available tools.

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Vault Structure

Everything is plain text.

hermod-vault/
├── .raven/
│   └── index.db          # SQLite index (disposable)
├── schema.yaml            # type and trait definitions
├── raven.yaml             # vault config, saved queries, workflows
├── daily/
│   └── 2026-02-17.md
├── project/
│   └── vanaheim-embassy.md
├── person/
│   ├── skirnir.md
│   └── forseti.md
└── meeting/
    └── 2026-01-17-council-gladsheim.md

• Folders map to types — person/ holds all person objects
• Files are markdown with YAML frontmatter — structured fields up top, freeform content below
• The SQLite index is disposable — delete it and run rvn reindex to rebuild from files
• Files are the source of truth — edit them with any editor, sync with cloud storage or git

See the file format reference for the full specification.

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Core Concepts

Types

Types define the kinds of objects in your vault. Each type has fields, a default folder, and a display name field.

# schema.yaml
version: 2

types:
  project:
    name_field: name
    default_path: project/
    fields:
      name:
        type: string
        required: true
      status:
        type: enum
        values: [backlog, active, paused, done]
        default: active

  person:
    name_field: name
    default_path: person/
    fields:
      name:
        type: string
        required: true
      realm:
        type: string
      role:
        type: string

Edit schema.yaml directly, or build it from the CLI:

rvn schema add type meeting --name-field name --default-path meeting/
rvn schema add field meeting date --type date
rvn schema add field meeting attendees --type ref[] --target person

Traits

Traits are inline annotations that make content queryable. They can appear anywhere in the body of a file.

@todo Bring the terms to Vanaheim before the new moon
@decision No commitments until Odin speaks
@priority(high) The Bifrost repairs cannot wait

Define traits in the schema:

rvn schema add trait priority --type enum --values low,medium,high

References

References (refs) connect objects using [[type/name]] syntax. Use them in both frontmatter and content.

---
type: meeting
project: [[project/vanaheim-embassy]]
attendees:
  - [[person/skirnir]]
  - [[person/forseti]]
---

[[person/skirnir]] reported back from his talks with Freyr.

Every ref creates a two-way link. Use rvn backlinks person/skirnir to see everything that mentions Skírnir.

See Core Concepts for a deeper introduction, and the schema reference for the full specification.

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Creating Objects

New typed objects

rvn new project "Vanaheim Embassy" --field status=active
rvn new person Skirnir --field realm=asgard --field role=envoy

Daily notes

Dates are a built-in type that powers the daily note workflow.

rvn daily              # today
rvn daily yesterday    # yesterday's note
rvn daily 2026-02-14   # specific date

Quick capture

Append to any file from the command line. Defaults to the daily note.

rvn add "Heard rumors of unrest in Niflheim — worth investigating"
rvn add "@todo Confirm Forseti reviewed the old grievances" --to project/vanaheim-embassy

Editing files

Files are plain markdown — edit them with any editor:

rvn open project/vanaheim-embassy    # opens in $EDITOR

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Querying

The query language has two modes: object queries find files, trait queries find annotations.

Object queries

rvn query 'object:project'                           # all projects
rvn query 'object:project .status==active'            # active projects
rvn query 'object:meeting refs([[person/skirnir]])'     # meetings mentioning Skírnir

Trait queries

rvn query 'trait:todo'                                # all todos
rvn query 'trait:todo .value==todo'                   # open todos only
rvn query 'trait:todo within(object:meeting)'         # todos inside meetings
rvn query 'trait:decision refs([[project/vanaheim-embassy]])'  # decisions on a project

Full-text search

rvn search "trade routes"                             # search all content
rvn search "Freyr" --type meeting                     # search within a type

Bulk operations on query results

rvn query 'trait:todo .value==todo' --apply 'update done' --confirm

Saved queries

Define common queries in raven.yaml:

queries:
  open-todos:
    query: "trait:todo .value==todo"
    description: Open todos
  active-projects:
    query: "object:project has(trait:todo)"
    description: Projects marked with @todo

rvn query open-todos
rvn query active-projects

See the query language reference for the full syntax including boolean composition, nested queries, and date predicates.

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Workflows

Workflows are multi-step pipelines that combine Raven tools with agent reasoning. Raven executes deterministic tool steps, then hands off to the agent at agent steps.

# workflows/meeting-prep.yaml
description: Prepare a brief for a meeting
inputs:
  meeting_id:
    type: ref
    target: meeting
    required: true

steps:
  - id: meeting
    type: tool
    tool: raven_read
    arguments:
      path: "{{inputs.meeting_id}}"
      raw: true

  - id: compose
    type: agent
    prompt: |
      Prepare me for this meeting.
      {{steps.meeting.data.content}}
    outputs:
      markdown:
        type: markdown
        required: true

Run via CLI or agent:

rvn workflow run meeting-prep --input meeting_id=meeting/2026-01-17-council-gladsheim

See the workflows reference for the full specification.

Documentation

Raven keeps long-form docs in your vault's .raven/docs cache. Browse them with rvn docs (sync with rvn docs fetch), or read them on GitHub:

Getting Started:

1. Getting Started — first-session flow and verification
2. Core Concepts — types, traits, references
3. Configuration — raven.yaml and config.toml

Types & Traits:

• Schema Introduction — practical schema.yaml basics
• Schema Reference — schema.yaml specification
• File Format — markdown + frontmatter spec
• Templates — type and daily templates

Querying / Vault Management / Workflows / Agents:

• Query Language — full RQL syntax
• Bulk Operations — patterns for operating at scale
• Hooks Removal Decision — rationale and alternatives
• Workflows — pipeline specification
• MCP Reference — agent integration

Interactive learning:

rvn docs          # browse the full documentation

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