All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

• list_module_dependents MCP tool - reverse dependency lookup to find all modules that depend on a given module
  • Supports filtering by dependency type (compiler or runtime)
  • Useful for assessing impact before refactoring or deprecating a module

• Support for overriding MCP tool descriptions at compile time via application configuration
  • Example: config :codicil, Codicil.MCP.Tools.FindSimilarFunctions, "custom description"

• BREAKING: Removed get_module_file_path MCP tool as it duplicates functionality available in Tidewave
• Reduced tool count from 6 to 5 tools to minimize overlap between MCP servers

• BREAKING: Renamed all MCP tools for better discoverability and consistency:
  • similar_functions → find_similar_functions
  • function_callers → list_function_callers
  • function_callees → list_function_callees
  • module_relationships → list_module_dependencies
  • module_file → get_module_file_path
  • function_code → get_function_source_code

• Enhanced all MCP tool descriptions with:
  • Clear use cases and trigger phrases for better AI assistant tool selection
  • Explicit debugging and refactoring contexts for callers/callees tools
  • Important notes to use indexed tools instead of shell commands (ls, grep)
  • More action-oriented naming (find/list/get prefixes)

• Multi-clause functions now correctly capture all clauses in the code field
• Added comprehensive test coverage for multi-clause function extraction
• Fixed RateLimiter error handling in tests when GenServer is not running

• mix codicil.migrate task for running database migrations
• module_file MCP tool to get the file path where a module is defined
• function_code MCP tool to retrieve function source code with preceding module-level use/alias/import directives
• Documentation for combining multiple MCP servers (Codicil + Tidewave) in README and module docs

• Fix tracer crash when compiling files with top-level defimpl statements

• mix codicil.setup task for easy database initialization (creates database and runs migrations)

• BREAKING: The exported field in the functions table is now required (NOT NULL constraint added)
• Updated Function changeset to require the exported field at validation level
• Placeholder functions (for external dependencies) now always have exported: true by default

• Tracer now provides clear error messages when CODICIL_LLM_PROVIDER is not set
• Better startup error handling to prevent silent compilation failures

Initial release of Codicil - semantic code search and analysis for Elixir projects via MCP.

MCP Tools:

• similar_functions - Semantic search for functions by behavior description
• function_callers - Find all functions that call a specific function
• function_callees - Find all functions called by a specific function
• module_relationships - Analyze module dependency chains (imports, aliases, uses, requires)