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Claude (adr9-steward) bb578d71e3 docs(adr): ADR 009 values compare by float rules, NaN canonical
NaN payloads are not preserved: every NaN is one canonical value in the
delta and crosses as ADR 005's `nan` token, so ADR 009 no longer changes
ADR 005 clause 11. Zeros follow IEEE: -0.0 equals +0.0, and a zero sum
takes the sign IEEE gives the same addends. The round-trip property test
asserts a NaN comes back as the canonical NaN.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VdfEGXA7aJ6ftMsCc9PJze
2026-10-09 22:44:30 -07:00
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