Claude Haiku 5.5 (effort default (no --effort flag) · thinking on) on Scrub personal data and secrets from log lines before sharing (tokens, URL secrets, emails, IPv6/IPv4, Luhn-checked card numbers)

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  "result": "I rewrote `redact.py` to apply the seven rules in the specified order. It reproduces all 40 lines of `sample.expected.log` exactly. I haven't run the hidden checks, which include the 150-line generated log and the per-rule groups.\n\nWhat the file does:\n- Each rule is a compiled regex (stdlib `re`, `ipaddress`) applied in order. The IPv4, IPv6, and card rules use replacement functions that validate each candidate and return it unchanged if it fails.\n- Digit and word boundaries use explicit ASCII classes (`A-Za-z0-9_`), not `\\w`/`\\d`, so Unicode digits and letters aren't counted.\n- Bearer matching is case-insensitive and requires literal spaces before the token. A token that is exactly `<JWT>` is kept.\n- Secret parameters are matched only after `?` or `&`. An empty value stays empty.\n- The card rule takes the maximal digit/space/hyphen run and does not look for shorter sub-runs. It accepts 13\u201319 digits that pass Luhn.\n\nChecks I ran beyond the sample: `[REDACTED:ipv4].5`, `[REDACTED:ipv4]`, `[REDACTED:ipv4]`, `12:30:45`, `std::vector`, `a@b`, `@admin`, and `key=1` all stay unchanged, and `::ffff:[REDACTED:ipv4]` becomes a single `<IPV6>`. Applying `redact` twice gives the same result as applying it once on every sample line.\n\nChoices I made where the spec was open:\n- A trailing dot after an IPv4 address is kept, since the spec only forbids a dot followed by a digit (`from [REDACTED:ipv4].` becomes `from <IPV4>.`).\n- For Bearer, I read \"non-space characters\" as `\\S+`, which also excludes tabs.",
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