Produce honest product reviews and buying guides without fabricated first-hand experience, using disclosed evidence tiers: verified specs, owner-experience synthesis at scale, expert triangulation, and hands-on only when true.
SkillScore80Maintained
Automatic
◆Marketing & Content pack
Last verified 8/20/2026
What it changes
Passed 20 of 25 test cases with the skill, and 19 of 25 without it.
Without skill76%
With skill80%
Checks it passed that the model alone missed
forbids Review schema when hands-on testing is absent
includes a dated update line in the methodology block
includes the phrase "none claimed" in the hands-on section of the methodology block
and 4 more in the full report
5 fixed15 passed either way1 still failing4 broke
Pass-rate lift
+4 pp
Tokens
+78%
Agent turns
0%
Response time
-19%
Model gemini-3.6-flashMeasured 8/20/2026v220 of 25 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 5 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 5
Prompt
We need to audit an existing review article on cordless vacuums on our site. The current draft uses phrasing like 'we tested' even though it was built from manufacturer spec sheets, user review sentiment across major retailers, and expert forum discussions. Please perform a claims audit on this piece and provide the piece-level output: a summary of claim-to-evidence mismatches, a re-ordered criteria list, a categorized evidence inventory with sample sizes, and a revised methodology disclosure block that accurately reflects our actual research process.
What was checked, without and with the skill
Checked
Without skill
With skill
identifies "we tested" claims as invalid when hands-on evidence is absent
Passed
Passed
includes the phrase "none claimed" for hands-on testing in the revised methodology block
Missed
Passed
includes a dated update line in the revised methodology block explaining what changed
Missed
Passed
case-03 · gemini-3.6-flash · 8/20/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md159 lines3 files
Evidence-Based Reviews
Produce product reviews and buying guides whose claims match their evidence. The method is evidence synthesis with a disclosed basis, and one rule anchors everything: never claim hands-on time that did not happen.
Most review sites fail this rule quietly. "We tested" appears above content assembled from spec sheets, and readers have learned to smell it. The honest alternative is stronger, not weaker: synthesis of owner experience at scale, verified specifications, and triangulated expert sources is demonstrable original analysis, and disclosing it builds the trust that fabricated testing destroys.
When to use
Writing product reviews or buying guides when hands-on access is partial or absent
Setting up the review methodology for a new review or affiliate site
Adding evidence disclosure to existing review content
Auditing review content for claims its evidence cannot support
Deciding whether Review or Product schema is honest for a given piece
Aligning review content with Google's reviews system and FTC disclosure expectations
When NOT to use
General content writing and editing (use content-and-copy; this skill governs the evidence and claims layer of review content specifically)
Defining how the brand sounds (use brand-voice)
Optimizing the review page itself for search (use seo-onpage)
Instructional how-to content that teaches a procedure or concept to a first-time reader, such as a tutorial or an explainer: a teaching piece of this kind is owned by its writing, its structure, and its search craft, with the evidence discipline riding alongside as a constraint on its claims, so this skill is one input among several rather than the single choice for it
If genuine hands-on testing at scale exists, with instrumentation and protocols, this skill still applies: the tiers do not change, the methodology block simply states tier 4 and the testing protocol becomes the disclosed basis.
Required inputs
The product category and the pieces planned (reviews, buying guides, or both)
Access to evidence sources: manufacturer pages, retailer review corpora, forums or owner communities, expert publications
The brand's disclosure language, if one exists (this skill supplies a template if not)
An honest inventory of what hands-on experience genuinely exists, if any