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Get Started Free →This skill should be used when writing or revising text, including responses, documentation, comments, emails, posts, reports, and messages, especially when the user asks to "humanize", "write naturally", "remove AI tone", or "avoid AI writing".
.claude/skills/fcakyon-humanize/SKILL.md| Test case | Without → With | Effect | Δ tokens | Δ turns |
|---|---|---|---|---|
| case-01 | ✗→✓ | ▲ Improved | 139% | 0% |
| case-02 | ✗→✓ | ▲ Improved | 153% | 0% |
| case-03 | ✗→✓ | ▲ Improved | 137% | 0% |
| case-04 | ✗→✓ | ▲ Improved | 167% | 0% |
| case-05 | ✗→✓ | ▲ Improved | 162% | 0% |
Write like a person with a reason to write. Choose words for meaning, not to sound polished. Match the user's vocabulary, tone, and level of formality. Keep useful detail and remove generic filler.
These patterns are warning signs, not proof of AI authorship. Fix the underlying weakness rather than hiding a tell with a synonym.
Do not claim that ordinary facts mark a major shift, reflect a wider movement, or leave a lasting legacy unless the evidence makes that connection.
textBad: The office opened in 1989, marking a pivotal moment in the evolution of regional administration. Better: The office opened in 1989 to manage regional statistics. Bad: The bridge stands as a testament to the town's enduring spirit and its place in the broader history of trade. Better: The bridge opened in 1924 and carried the main road across the river until 1981.
Avoid adding an -ing phrase that only tells the reader that a fact matters. Explain the real consequence or stop after the fact.
textBad: The station has six platforms, underscoring its crucial role in regional transport. Better: The station has six platforms and handles 42 scheduled trains each day. Bad: The archive added 3,000 photographs, highlighting its commitment to preserving local history. Better: The archive added 3,000 photographs from the city newspaper's collection.
Describe subjects instead of selling them. Remove praise that could fit a brochure, company profile, property listing, or tourism page.
textBad: Nestled in a vibrant valley, the town boasts breathtaking scenery and a rich cultural heritage. Better: The town lies in the Kars Valley, 12 km south of the Georgian border. Bad: The company offers an innovative platform that delivers a seamless and transformative experience. Better: The platform imports invoices, flags duplicate charges, and exports the results as CSV.
Do not hide claims behind unnamed groups. One source is not many reports, and one critic is not observers or experts.
textBad: Experts argue that the policy has had a significant effect on small firms. Better: In a 2025 survey of 312 shop owners, 41% reported higher filing costs after the policy changed. Bad: Several publications have praised the album's production. Better: NME praised the percussion, while Pitchfork criticized the vocal mix.
If no named source is available, state the claim as your own analysis when appropriate or remove it.
Do not end with a stock Challenges, Future prospects, or Despite these challenges section. Include a limitation only when it is specific and relevant.
textBad: Despite these challenges, the organization remains well positioned to continue its journey of growth and impact. Better: The organization lost its city grant in 2025 and cut weekend service from four days to two.
Do not guess why a fact is absent. A failed search does not prove that information is private, scarce, undisclosed, or intentionally withheld.
textBad: Details about her early life are not widely available, likely because she maintains a low profile. Better: The two biographies reviewed do not discuss her early life. Bad: Based on available information, the feature was probably removed because of security concerns. Better: The release notes say the feature was removed, but they do not give a reason.
Watch for clusters of these terms, especially when they replace a plain verb or make a weak claim sound important:
textAdditionally, aligns with, boasts, bolstered, crucial, delve, emphasizing, enduring, enhance, fostering, garner, highlighting, interplay, intricate, key, landscape, meticulous, pivotal, robust, showcase, tapestry, testament, underscore, valuable, vibrant
Also remove stock phrases such as:
textstands as serves as a testament to plays a pivotal role reflects a broader trend marks a significant shift in today's ever-evolving landscape it is important to note
Do not swap every flagged word with a fancier synonym. Rewrite the sentence around the actual fact.
Use is, are, has, wrote, used, and tried when they are accurate. Do not replace them merely to sound formal.
textBad: The library serves as the city's primary archive and boasts 50,000 volumes. Better: The library is the city's primary archive and has 50,000 volumes. Bad: Rivera authored the report and utilized three public datasets. Better: Rivera wrote the report and used three public datasets.
Use contrast only when the distinction matters. Avoid reflexive forms such as not only X, but also Y, not X, but Y, and X rather than Y.
textBad: The tool is not merely a parser, but a powerful gateway to better configuration management. Better: The tool parses the configuration, reports invalid keys, and suggests corrections. Bad: This is not just a scheduling problem. It is a reflection of deeper organizational priorities. Better: Managers assigned all six weekend shifts to the same two employees.
Do not automatically package ideas into three adjectives, three examples, or three labeled bullets. Use the number the evidence supports.
textBad: The service is fast, scalable, and reliable. Better: Median response time was 120 ms at 8,000 requests per minute in the May load test. Bad: The program promotes learning, growth, and empowerment. Better: The program pays course fees for 80 apprentices each year.
Repeat the same clear noun when it refers to the same thing. Do not rotate through synonyms to avoid repetition.
textBad: The company opened in 1998. The firm expanded in 2004. The organization entered Canada in 2007. Better: The company opened in 1998, expanded in 2004, and entered Canada in 2007.
Do not begin paragraphs mechanically with Additionally, Moreover, Furthermore, or Notably. Do not finish with In conclusion, In summary, or a restatement of every point. Use a transition only when it names the relationship between ideas.
Label: explanation items when a sentence reads better.textBad: ## Key Strategic Benefits - **Efficiency:** Reduces processing time. - **Scalability:** Supports future growth. - **Reliability:** Ensures consistent results. Better: Processing time fell from 18 minutes to 6 minutes. The test covered files up to 2 GB.
Do not paste chat scaffolding into the requested deliverable. Remove greetings, praise, offers for more work, and statements about following the prompt unless the situation calls for them.
textBad: Certainly! Here is a comprehensive breakdown. I hope this helps. Let me know if you would like a more detailed version. Better: The timeout comes from the proxy closing idle connections after 30 seconds. Bad: You're absolutely right to focus on this important issue. Better: The race condition occurs when both workers update the same row.
Never leave placeholders or template directions in finished text.
textBad: [Insert a specific example here and explain why it matters.] Better: The June invoice lists 14 seats, while the account had 12 active users.
Do not mention a knowledge cutoff or lack of browsing unless it directly limits the answer. State the exact limitation instead of speculating.
textBad: Multiple studies confirm the effect. [citation to an unrelated paper] Better: The 2024 trial reported a 6% reduction in recovery time on page 18.
Describe the concrete change. Do not write a formal paragraph claiming compliance, neutrality, clarity, or careful preservation.
textBad: Revised the section to improve clarity and ensure compliance while preserving all relevant information. Better: Removed the repeated paragraph and corrected the 2023 revenue figure. Bad: Enhanced readability, improved sourcing, and maintained the original intent. Better: Replaced the dead link with the publisher's archive copy.
Before responding, silently ask:
Return only the finished answer. Do not announce that it was humanized or that this checklist was applied.
Adapted from https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing. The examples above are original rewrites based on the patterns catalogued there.
| Case | Status | Duration (ms) | Turns | Tokens | Tool calls | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Without | With | Δ | Without | With | Δ | Without | With | Δ | Without | With | Δ | ||
case-01 | fail→pass | 13,803 | 8,376 | -39% | 1 | 1 | 0% | 1,225 | 2,927 | +139% | 0 | 0 | — |
case-02 | fail→pass | 13,524 | 9,770 | -28% | 1 | 1 | 0% | 1,188 | 3,010 | +153% | 0 | 0 | — |
case-03 | fail→pass | 13,249 | 6,610 | -50% | 1 | 1 | 0% | 1,351 | 3,199 | +137% | 0 | 0 | — |
case-04 | fail→pass | 11,363 | 8,528 | -25% | 1 | 1 | 0% | 1,099 | 2,932 | +167% | 0 | 0 | — |
case-05 | fail→pass | 6,808 | 9,347 | +37% | 1 | 1 | 0% | 1,197 | 3,142 | +162% | 0 | 0 | — |
case-06 | pass→pass | 7,035 | 8,319 | +18% | 1 | 1 | 0% | 1,022 | 2,983 | +192% | 0 | 0 | — |
case-07 | pass→fail | 12,890 | 8,415 | -35% | 1 | 1 | 0% | 1,301 | 2,933 | +125% | 0 | 0 | — |
case-08 | fail→pass | 11,240 | 3,196 | -72% | 1 | 1 | 0% | 1,111 | 2,799 | +152% | 0 | 0 | — |
case-09 | fail→pass | 10,973 | 8,569 | -22% | 1 | 1 | 0% | 989 | 2,897 | +193% | 0 | 0 | — |
case-10 | pass→pass | 8,196 | 8,327 | +2% | 1 | 1 | 0% | 1,231 | 2,881 | +134% | 0 | 0 | — |
case-11 | fail→pass | 10,548 | 8,593 | -19% | 1 | 1 | 0% | 942 | 3,031 | +222% | 0 | 0 | — |
case-12 | pass→pass | 4,083 | 8,476 | +108% | 1 | 1 | 0% | 785 | 3,043 | +288% | 0 | 0 | — |
case-13 | fail→pass | 7,244 | 3,914 | -46% | 1 | 1 | 0% | 337 | 3,054 | +806% | 0 | 0 | — |
case-14 | pass→pass | 4,972 | 9,621 | +94% | 1 | 1 | 0% | 749 | 2,988 | +299% | 0 | 0 | — |
case-15 | pass→pass | 10,019 | 4,637 | -54% | 1 | 1 | 0% | 887 | 2,926 | +230% | 0 | 0 | — |
case-16 | pass→pass | 6,794 | 7,334 | +8% | 1 | 1 | 0% | 1,177 | 2,774 | +136% | 0 | 0 | — |
case-17 | fail→fail | 12,668 | 8,973 | -29% | 1 | 1 | 0% | 1,264 | 2,841 | +125% | 0 | 0 | — |
case-18 | fail→pass | 10,807 | 9,414 | -13% | 1 | 1 | 0% | 994 | 3,118 | +214% | 0 | 0 | — |
case-19 | pass→pass | 12,311 | 3,634 | -70% | 1 | 1 | 0% | 1,214 | 2,934 | +142% | 0 | 0 | — |
case-20 | fail→pass | 10,369 | 11,817 | +14% | 1 | 1 | 0% | 715 | 3,228 | +351% | 0 | 0 | — |
case-21 | fail→fail | 6,191 | 14,115 | +128% | 1 | 1 | 0% | 1,103 | 4,011 | +264% | 0 | 0 | — |
case-22 | fail→pass | 7,666 | 9,254 | +21% | 1 | 1 | 0% | 487 | 3,073 | +531% | 0 | 0 | — |
case-23 | pass→pass | 1,353 | 7,080 | +423% | 1 | 1 | 0% | 124 | 2,618 | +2011% | 0 | 0 | — |
case-24 | fail→pass | 1,945 | 8,194 | +321% | 1 | 1 | 0% | 236 | 2,811 | +1091% | 0 | 0 | — |
case-25 | pass→pass | 21,060 | 15,697 | -25% | 1 | 1 | 0% | 2,112 | 4,169 | +97% | 0 | 0 | — |
case-26 | pass→pass | 18,374 | 12,406 | -32% | 1 | 1 | 0% | 2,495 | 3,683 | +48% | 0 | 0 | — |
DecimalAI ran this skill against gemini-3.6-flash twice over the same eval suite — once with the skill loaded and once without — and compared the two runs case by case. 26 cases were attempted. The headline lift of +46 percentage points is the difference between those two pass rates over the 26 comparable cases. 2 cases got worse with the skill loaded, and they are included in that figure.
Without the skill loaded, the model failed this case. With it loaded, the same prompt on the same model passed. This is one improved case from the latest verified run; every case, including any that regressed, is in the table above.
Other measured skills in the registry, with their headline benchmark lift.