Refuse GoogleOther with a bare 403 - #6
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robots.txt refuses it since #5, but Google caches robots.txt for up to a day, and meanwhile it walks every filter combination of /servers and /api/v1/search at ~120/min. Answer it in the gate with a few bytes and no data. robots.txt stays readable so it can learn the refusal; Googlebot is untouched. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
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Follow-up to #5. GoogleOther is still crawling at ~120/min (1,768 × 200 and 1,230 × 402 in its last 3,000 requests on dev2), because Google caches robots.txt for up to a day.
The gate now answers any
GoogleOtheruser agent with a 45-byte 403 before the gateway or throttle, except/robots.txt, which it needs to read to learn the refusal. Googlebot (Search) is untouched.Tests: 72/72 against a real Postgres, including a new test (GoogleOther: 403 on /api and /servers, 200 on /robots.txt; Googlebot: 200 on /servers). Lint is clean.
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