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agents.writerslogic.com

Statically analyses an ECMAScript regular expression (up to 500 characters) for catastrophic backtracking (nested or overlapping quantifiers, ambiguous alternation in a loop, backreferences, lookarounds) for agents that write or accept regexes. Runs the caller's test subjects (up to 20, 1000 characters each) only when the pattern is proven polynomially bounded and the subject is short enough for that bound; otherwise reports the risk and runs nothing. A fail names a pattern with a provable exponential split; unknown means not proven safe, not proven unsafe. Does not translate other regex flavors.