fix(regex): generalize Perl ASCII-strict fold crossings - #1067
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Protect non-ASCII literal source code points under Perl /aa whenever an unrestricted fold alternative crosses into ASCII. Keep all-non-ASCII multi-character folds enabled. Add system-Perl-first and direct Joni matrices for forward and reverse full folds, scoping, character classes, set composition, and ASCII restrictions. Record the recovered wrong-worktree snapshot incident required by AGENTS.md. Generated with [OpenAI Codex](https://openai.com/codex) Co-Authored-By: OpenAI Codex <codex@openai.com>
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Summary
/aasource-crossing protection to every non-ASCII source fold that enters ASCIIValidation
make: warning-free in 3m50, 17 tasks, exit 0reg_fold.t: unchanged at 7,106/7,111; broadfold_grind_aa.tremains a classified routing gateStack
This draft is stacked on
fix/phase36-joni-lookbehind-acceptance-v3at exactparent
6dc8f49f88d45f2c940baabdbedae6a4568309dc. The broader/aaowner familyremains under focused classification before Java fold routing is removed.
References
dev/design/phase36-regex-parity.md.