Class CBMModuleDefIndex

src/pipeline/pass_parallel.c:1389–1389

     * to shrink the def array passed to the LSP from O(all_defs) to
     * O(relevant_defs). NULL → each file sees the full all_defs[]. */
    struct CBMModuleDefIndex *module_def_index;
    /* Tier 2 full: pre-built per-language registries (project-wide,
     * finalized, READ-ONLY). When non-NULL for a lang, the worker uses
     * cbm_run_X_lsp_cross_with_registry — skip per-file build entirely.