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Review caught a real internal contradiction: step 4 requires opening a linked source (a post's URL, a project's site) to verify a claim, but hard rule 6 said the skill may only read from the two declared interfaces — neither of which is a general web fetch. Declares a third interface (web content fetch) with explicit controls: http/https only, private/ loopback/link-local address ranges rejected (closes the SSRF vector a token's own attacker-controlled link.website field would otherwise open), a timeout, a response-size cap, and re-validation on redirect. Rule 6 now scopes "no browser automation" against open-ended browsing rather than against fetching one already-known URL, which is what it was actually contradicting. Also, per the same review: - New hard rule 7: a hard ~30-tool-call ceiling per card, so an adversarially ambiguous token can't turn one card into unbounded tool use — write the card with what's verified so far and say the cap was hit, same "neutral over fabricated" principle applied to cost/time. - New hard rule 8: a product-facing note that a hedged single-sourced negative claim about a named/identifiable party still carries reputational and legal exposure, even when the hedge itself is correct. - interfaces.md's turn-budget row and "what this skill must never do" section updated to match (three interfaces, not two; the 30-call cap is this skill's own stop condition, not one for the runtime to second-guess with a lower limit of its own). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>