ContextSpook

ContextSpook is a Ruby library that collects and organizes project information to help AI assistants understand codebases better. It provides a domain-specific language (DSL) for describing project context, which can then be exported as structured JSON data.

The DSL is general-purpose and can be used for any kind of project or collection of files, whether software development, documentation, research data, educational materials, creative projects, or any other type of organized information. The contexts/project.rb example below demonstrates how to describe a Ruby project, but the same principles apply across many different domains.

Add this line to your application's Gemfile:

gem 'context_spook'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install context_spook

Now you can generate context from a block directly in Ruby using the DSL:

context = ContextSpook::generate_context do
  context do
    variable branch: `git rev-parse --abbrev-ref HEAD`.chomp
    
    namespace "structure" do
      command "tree", tags: %w[ project_structure ]
    end
    
    namespace "lib" do
      Dir['lib/**/*.rb'].each do |filename|
        file filename, tags: 'lib'
      end
    end
    
    # ... rest of your context definition, see below for full example
  end
end

This approach can be used to dynamically generate a context when it is not configurable via a user context definition file, or as a fallback when users have not yet created such files.

Afterwards you can store the context as JSON in Ruby or send it to another application.

File.write 'context.json', context.to_json

Alternatively store the block's content above to a file contexts/project.rb:

# contexts/project.rb
context do
  variable branch: `git rev-parse --abbrev-ref HEAD`.chomp

  namespace "structure" do
    command "tree", tags: %w[ project_structure ]
  end

  namespace "lib" do
    Dir['lib/**/*.rb'].each do |filename|
      file filename, tags: 'lib'
    end
  end

  namespace "spec" do
    Dir['spec/**/*.rb'].each do |filename|
      file filename, tags: 'spec'
    end
  end

  namespace "gems" do
    file 'context_spook.gemspec'
    file 'Gemfile'
    file 'Gemfile.lock'
  end

  file 'Rakefile',  tags: 'gem_hadar'

  file 'README.md', tags: 'documentation'

  meta ruby: RUBY_DESCRIPTION

  meta code_coverage: json('coverage/coverage_context.json')
end

Now you can generate the context from the file, and store it as JSON in Ruby or send it to another application.

context = ContextSpook::generate_context('contexts/project.rb')
File.write 'context.json', context.to_json

Generate context and save to file:

./bin/context_spook contexts/project.rb > context.json

Or pipe directly to another tool:

./bin/context_spook contexts/project.rb | ollama_chat_send

You will see two orange warning messages, that demonstrates how errors like missing files or commands with failing exit codes are handled.

The DSL collects various types of project information:

• Variables: Key-value pairs (e.g., git branch)
• Files: Content, size, line count, and tags for each file
• Commands: Shell command outputs with exit codes and working directory
• Metadata: Project-wide attributes (e.g., Ruby version, coverage data)

The generated JSON is designed to be sent to Language Model assistants to provide them with comprehensive context about your codebase. This helps AI assistants understand:

• The project structure and file organization
• Key source files and their contents
• Command outputs that reveal project state
• Metadata about the development environment
• Coverage information for code quality

{
  "files": {
    "lib/context_spook.rb": {
      "namespace": "lib",
      "content": "...",
      "size": 1234,
      "lines": 56,
      "tags": [
        "lib"
      ]
    }
  },
  "commands": {
    "tree": {
      "namespace": "structure",
      "output": "lib\n├── context_spook\n│   └── generator.rb\n└── context_spook.rb\n\n2 directories, 3 files",
      "exit_code": 0,
      "working_directory": "/path/to/project"
    }
  },
  "metadata": {
    "ruby": "ruby 3.1.0 ...",
    "code_coverage": {}
  },
  "variables": {
    "branch": "main"
  }
}

The gem is available as open source under the terms of the MIT License