const SEARCH_TOOL = "cbm_search_tools";

/** Advanced graph tools loaded on demand through `cbm_search_tools`. */
export const LAZY_TOOLS = new Set([
  "cbm_query_graph",
  "cbm_trace_path",
  "cbm_detect_changes",
  "cbm_manage_adr",
  "cbm_ingest_traces",
  "cbm_get_graph_schema",
  "cbm_get_architecture",
  "cbm_check_index_coverage",
]);

/**
 * Schema-less tools emitted by codebase-memory-mcp's obsolete Pi generator.
 *
 * They use the removed `{ name, run }` registration shape, which leaves their
 * provider payload without a description or input schema. Claude rejects the
 * whole request when any one of these tools is active. This package provides
 * the supported `cbm_*` replacements, so the legacy tools must stay inactive.
 */
export const LEGACY_SCHEMALESS_TOOLS = new Set([
  "index_repository",
  "search_graph",
  "query_graph",
  "trace_path",
  "get_code_snippet",
  "get_graph_schema",
  "get_architecture",
  "search_code",
  "list_projects",
  "delete_project",
  "index_status",
  "check_index_coverage",
  "detect_changes",
  "manage_adr",
  "ingest_traces",
]);

/** Return the active tool set for a fresh session. */
export function initialActiveTools(active: readonly string[]): string[] {
  const keep = active.filter(
    (name) => !LAZY_TOOLS.has(name) && !LEGACY_SCHEMALESS_TOOLS.has(name),
  );
  return [...new Set([...keep, SEARCH_TOOL])];
}