The `humanizer` skill is adapted from blader/humanizer.

    Upstream:  https://github.com/blader/humanizer
    Version:   2.11.2
    Vendored:  2026-08-24
    License:   MIT

The pattern catalogue in references/patterns.md and the guidance in
references/false-positives.md derive from that project, which in turn draws its
patterns from Wikipedia's "Signs of AI writing", maintained by WikiProject AI
Cleanup and available under CC BY-SA 4.0:

    https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing

Changes made when vendoring:

  - Split the single upstream SKILL.md into a lean SKILL.md plus two reference
    files, matching this repository's skill layout.
  - Replaced the upstream frontmatter with the coding-os skill schema.
  - Added the boundary against the technical-writing skill, the list of
    coding-os surfaces the skill applies to, and the community-post failure
    modes observed in this project.
  - Folded in fixes from upstream pull requests open at the time of vendoring:
    corrected the §7 and §8 examples that added facts absent from their source
    text (#233), extended the §31 and §33 watch lists (#240), reconciled the
    self-check with the patterns that require removing a claim (#236), and
    protected inline code spans during a file rewrite (#235).
  - Added pattern 36 (uniform sentence and paragraph length) from upstream #211.
  - Did not adopt upstream #200 (anti-detector techniques). The goal here is
    prose a person wants to read, not text engineered to defeat a classifier.

Guardrails against manufacturing false personality, and against asserting that
a given text was model-written, are adapted from the technical-writing skill in
vercel/eve (Apache-2.0): https://github.com/vercel/eve

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