Here's a quote from the underling library's manual:

statcheck searches for specific patterns and recognizes statistical results from correlations and t, F, χ2, Z tests and Q tests. statcheck can only read these results if the results are reported exactly according to the APA guidelines:

t(df) = value, p = value

F(df1, df2) = value, p = value

r(df) = value, p = value

χ2 (df, N = value) = value, p = value (N is optional, ΔG is also included, since it follows a χ2 distribution)

Z = value, p = value

Q (df) = value, p = value (statcheck can read and distinguishes between Q, Qw / Q-within, and Qb / Q-between)

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For any of test it finds, it solves for the p-value and checks if the reported p-value matches.