Mostly efficient domain-specific guidance, but it repeats the unkeyed-header list across 'Autonomous Testing Priority', 'Attack Surface Signals', 'Payload & Detection Patterns', and the 'Burp Suite Intruder wordlist', and the inline 'Disclosed Report Citations' carry time-sensitive bounty amounts and years (2017–2024) outside any deprecated/old-patterns section; not a 1 because it avoids explaining basics Claude already knows, not a 3 because of the redundancy and dated padding.

Provides copy-paste-ready executable curl commands with specific headers, grep/Intruder wordlists, and concrete path-trick payloads (e.g. 'GET /account/profile.css', '?cb=$RANDOM'); not a 2 because the commands are complete and runnable rather than pseudocode.

The 10-step methodology is clearly sequenced with explicit validation checkpoints — Step 3's cache-busting canary, Step 7 'Validate cache storage' from a separate IP/incognito, and the standalone 'Gate 0 Validation' checklist with feedback criteria; not a 2 because validation and the validate→fix→retry loop are explicit for this high-risk operation.

Well-sectioned with clear headers but monolithic at ~330 lines with no references/, scripts/, or assets/ bundle files; content that could be split (the 7-entry citations list, header wordlists, detailed impact scenarios) is inline; not a 1 because organization is strong, not a 3 because for a skill this large nothing is offloaded to one-level-deep reference files.

Lists multiple concrete sub-techniques — 'X-Forwarded-Host poisoning', 'X-HTTP-Method-Override / GCS cache', 'reflected→stored XSS via cache', 'classic Omer-Gil Web Cache Deception', 'Cloudflare Cache Deception Armor bypass', 'session-token cache deception', 'Akamai hop-by-hop smuggling → server-side edge poisoning', 'Kettle's 2024 path-normalization WCD' — matching the anchor for multiple specific concrete actions; it is not a 2 because the enumeration is comprehensive rather than partial.

Explicitly answers both what (a hunting skill enumerating concrete cache-attack sub-classes with an ownership boundary against hunt-host-header) and when via the explicit 'Use when hunting cache poisoning, Web Cache Deception, CDN-fronted apps.' trigger clause; not a 2 because the 'Use when...' clause is present, satisfying the cap rule.

Natural user-facing terms are well covered via 'Use when hunting cache poisoning, Web Cache Deception, CDN-fronted apps', plus 'cache poison vulnerabilities'; not a 2 because common variations users would actually say are present rather than only technical jargon.

Carves a clear niche and resolves overlap explicitly — 'Host/X-Forwarded-Host injection that reaches app logic ... is owned by hunt-host-header; this skill owns the case where the poisoned response is CACHED and served to other users'; not a 2 because the conflict boundary is stated outright rather than merely implied.