- Fix memory leak in delta_deserialize() on BLOCK_MATCH error path
- Fix memory leak on malloc failure for literal data
- Add port range validation (1-65535) for -p/--port and --server-port
- Restore -V/--version flag with usage text
- Use MAX_DATA_PAYLOAD_SIZE consistently (remove local MAX_DATA_SIZE)
- Fix integer truncation in config_send/config_receive for delta_block_size
- Add log messages for malloc failures
- Extract config_set_defaults() helper to eliminate duplication
- Add 10 new CLI tests for argument parsing
- Restore PROTOCOL_VERSION to a forward-compatible 2.1.0 and document wire format
- Add NULL guard to config_delete
- Add pipeline cancellation flag and cancellation-aware queue helper
- Join running threads before destroying pipeline contexts on creation failure
- Fix NULL dereference and memory leaks in manifest/chunk handling
- Fix TLS/TCP socket fd leak on connect error paths
- Add compression-level range validation (1-22)
- Close previous log file before opening a new one
- Use getline for unbounded pattern-file lines
- Fix thread-unsafe localtime() and add log level bounds check
- Fix file_load_data to clean up data on read size mismatch
- Add hard ceiling to decompression buffer growth
- Fix mkdir_r bounds check and restore glob comments
- Add send_str NULL guard and mutex-protect bandwidth limiter
- Update AGENTS.md for per-thread io_ssl contract
- Fix FILE* leak when --log-file specified multiple times
- Add strtoull endptr validation for --delta-block/--delta-max
- Add range validation (1-22) for -c compression level
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