Implements the core bin-packing algorithms for distributing file entries into partitions. Functions like dispatch_file_entry_p_by_size (largest-first greedy), dispatch_empty_file_entries (spreads zero-size files evenly), and dispatch_file_entries_by_limits (dynamic partition creation with size/count limits) are self-contained and could be extracted for any item-grouping problem. They only depend on types.h and partition.h, making them reusable in other C projects needing similar load-balancing logic.

Provides a double-linked list implementation for partition management, including add_partitions, remove_partition, find_smallest_partition_index, and get_partition_at. These functions are generic and could be reused in any project requiring a dynamic list of weighted buckets. The code is clean, uses assertions, and handles edge cases like empty partitions.

Contains a collection of reusable utility functions: str_to_uintmax (with human-friendly size multipliers), parent_path (robust path parent extraction), clone_env/push_env (safe environment manipulation for hooks), and valid_file (pattern matching with fnmatch). These functions are well-tested (see tests/test-parent_path.c) and could be extracted for use in other C programs needing similar string or path operations.

A sophisticated shell script that orchestrates parallel data migrations using fpart and external copy tools. It implements a disk-based job queue, manages concurrent workers (local or over SSH), supports resume/replay of runs, and provides real-time status via SIGINFO. The script demonstrates advanced shell patterns: FIFO-based logging, process group management, trap handlers, and robust error handling. It could serve as a reference for building similar distributed job schedulers in shell.