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Changelog

[0.3.0]

Fixed

Central directory now folds into the last data volume when there is room, instead of unconditionally creating a separate .zip volume holding only metadata. A 1368 MiB file split at 1024 MiB used to produce three files (.z01, .z02, .zip) where .zip was ~80 bytes; it now produces two (.z01, .zip).

Changed

VolumeManager.start_final_volume() accepts an optional reserved_bytes hint. The writer pre-serializes the central directory and passes its exact size + EOCD size so the volume manager can decide whether to fold. Default of 0 preserves the previous behavior.

[0.2.0]

Security

Fix path traversal (zip slip) in sanitize_arcname
Add ZIP32 overflow guards (4GB file limit, 65535 entry limit)
Detect and skip symlinks
Sanitize directory entry arcnames through sanitize_arcname

Added

CI workflow (lint, type-check, test across Python 3.9–3.13)
Trusted publisher PyPI publishing via OIDC
CLI tests, volume boundary tests, overflow guard tests
API reference and limitations documentation
Compression parameter validation
Volume count warning when exceeding 99 volumes
Streaming compression in writestr for large buffers
CI: p7zip-full for integration tests, 80% coverage threshold

Fixed

Local file headers no longer split across volume boundaries
close() is now idempotent (safe on re-entry)
__exit__ skips finalization on error instead of writing corrupt archive
Archive name length validated against 65535-byte ZIP limit
space_remaining() returns sys.maxsize instead of float("inf")
CLI returns exit code 1 for unknown subcommands
README clone URL matches repository URL
create() returns list[Path] for consistency with close()
parse_size type annotation includes float
Removed placeholder author email from pyproject.toml
Pinned build tool version in publish workflow

Removed

Dead code: _is_utf8() method, SPLIT_ARCHIVE_SIG constant
Python 3.14 from classifiers (not yet released)