loki/docs/testing/plans/16-functions-and-tools.md

Test Plan: Functions and Tools

Behaviors to test

Function declarations

• Functions::init loads from visible_tools config
• Tool declarations parsed from bash scripts (argc annotations)
• Tool declarations parsed from python scripts (docstrings)
• Tool declarations parsed from typescript (JSDoc + type inference)
• Each declaration has name, description, parameters
• Agent tools loaded via Functions::init_agent
• Global tools loaded via build_global_tool_declarations

Tool compilation

• Bash tools compiled to bin directory
• Python tools compiled to bin directory
• TypeScript tools compiled to bin directory
• clear_agent_bin_dir removes old binaries
• Tool file priority: .sh > .py > .ts > .js

User interaction functions

• append_user_interaction_functions adds user__ask/confirm/input/checkbox
• Only appended in REPL mode
• User interaction tools work at depth 0 (direct prompt)
• User interaction tools escalate at depth > 0

MCP meta functions

• append_mcp_meta_functions adds invoke/search/describe per server
• Meta functions removed when ToolScope rebuilt without those servers
• Function names follow mcp_invoke_ pattern

Function selection

• select_functions filters by role's enabled_tools
• "all" enables everything
• Specific tool names enabled selectively
• mapping_tools aliases resolved
• Agent functions included when agent active
• MCP meta functions included when servers active

Old code reference

• src/function/mod.rs — Functions struct, init, init_agent
• src/config/paths.rs — agent_functions_file (priority)
• src/parsers/ — bash, python, typescript parsers