Class: RailsAiBridge::Serializers::Providers::DevinRulesSerializer

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_ai_bridge/serializers/providers/devin_rules_serializer.rb

Overview

Generates .devin/rules/*.md files for Devin rule discovery. Each file is hard-capped at MAX_CHARS_PER_FILE characters (under Devin's 6K limit).

Constant Summary collapse

MAX_CHARS_PER_FILE =

Per-file character cap before truncation.

5_800

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ DevinRulesSerializer

Returns a new instance of DevinRulesSerializer.

Parameters:



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# File 'lib/rails_ai_bridge/serializers/providers/devin_rules_serializer.rb', line 16

def initialize(context)
  @context = context
end

Instance Attribute Details

#context ⇒ Hash (readonly)

Returns Introspection context passed to serializers.

Returns:

  • (Hash) —

    Introspection context passed to serializers.



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# File 'lib/rails_ai_bridge/serializers/providers/devin_rules_serializer.rb', line 13

def context
  @context
end

Instance Method Details

#call(output_dir) ⇒ Hash<Symbol, Array<String>>

Writes rule markdown files under .devin/rules/ when content changes.

Parameters:

  • output_dir (String) —

    Root directory (typically the Rails app root) where .devin/rules is created.

Returns:

  • (Hash<Symbol, Array<String>>) —

    +:written+ and +:skipped+ arrays of absolute file paths.



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# File 'lib/rails_ai_bridge/serializers/providers/devin_rules_serializer.rb', line 24

def call(output_dir)
  rules_dir = File.join(output_dir, '.devin', 'rules')
  FileUtils.mkdir_p(rules_dir)

  written = []
  skipped = []

  files = {
    'rails-context.md' => render_context_rule,
    'rails-mcp-tools.md' => render_mcp_tools_rule
  }

  files.each do |filename, content|
    next unless content

    # Enforce Devin's 6K limit
    content = content[0...MAX_CHARS_PER_FILE] if content.length > MAX_CHARS_PER_FILE

    filepath = File.join(rules_dir, filename)
    if File.exist?(filepath) && File.read(filepath) == content
      skipped << filepath
    else
      File.write(filepath, content)
      written << filepath
    end
  end

  { written: written, skipped: skipped }
end