chattolib/.beans/chattolib-tyjb--relicense-chattolib-from-mit-to-mpl-20-with-apache.md

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chattolib-tyjb

title: Relicense chattolib from MIT to MPL-2.0 (with Apache-2.0 for vendored protos) status: completed type: task priority: high created_at: 2026-07-12T23:57:31Z

updated_at: 2026-07-12T23:59:34Z

Switch the library's license from MIT to MPL-2.0 for chattolib's own code, keeping Apache-2.0 for the vendored Chatto proto material (proto/** and src/chattolib/_pb/**). Ship LICENSE, LICENSES/, REUSE.toml, LICENSING.md, update pyproject metadata. Historical MIT releases (<= 0.4.9) stay MIT on PyPI forever; the relicense affects new versions only.

Summary of Changes

Relicensed chattolib from MIT to MPL-2.0 (with Apache-2.0 preserved for vendored Chatto/buf material). Follows Chatto's own REUSE-based split.

• LICENSE replaced with the canonical MPL-2.0 text.
• Added LICENSES/MPL-2.0.txt and LICENSES/Apache-2.0.txt (REUSE convention).
• Added REUSE.toml with the machine-readable licence map:
  • Default: MPL-2.0 for chattolib's own code (TheCodemancer copyright).
  • proto/chatto/** and src/chattolib/_pb/chatto/**: Apache-2.0 (ChattoCorp copyright).
  • proto/buf/** and src/chattolib/_pb/buf/**: Apache-2.0 (Buf Technologies copyright).
• Added LICENSING.md explaining the dual arrangement in prose.
• pyproject.toml: license = "MPL-2.0 AND Apache-2.0" (SPDX expression, PEP 639), license-files = ["LICENSE", "LICENSES/*.txt"].
• Refreshed README.md License section; noted that MIT releases (<= 0.4.9) stay MIT on PyPI forever.
• Build validated: wheel bundles LICENSE + LICENSES/*.txt under chattolib-0.4.9.dist-info/licenses/. twine check passes with the new SPDX expression.

Historical MIT releases (0.0.1 through 0.4.9) remain MIT-licensed on PyPI; the relicence applies to newly published releases only.