Last year, I helped a friend prep for job interviews. He pulled up his resume, pointed to “advanced Excel modeling” with genuine pride, and called it his strongest skill. We both went quiet for a second. Nobody wanted to say what we were both thinking.
Skills don’t come with expiration dates. They just quietly stop mattering while you’re busy doing everything else.
A Redditor named u/Tall_Ad4729 had exactly that kind of moment while updating his own resume six months ago. He realized half the skills he was proud of were either automated, commoditized, or just not what anyone was hiring for. So the author built a ChatGPT prompt to do what most people can’t do alone: run an honest, structured audit of your entire skill set.
Why this matters 📊
Nearly 40% of professional skills are expected to change or become obsolete within the next few years. That’s not a motivational poster stat. That’s a direct challenge to anyone who hasn’t revisited their skill set since their last job change.
The problem isn’t that skills decay. It’s that they decay invisibly. The market shifts around you, junior tools catch up, and you’re still confidently listing the same strengths from five years ago. Nobody sends a deprecation warning.
The author ran this audit on his own skill set three separate times. Each round surfaced something he was in denial about. One thing he considered a core strength? Junior tools handle it now. Something he’d been ignoring for years? It turned out to be the fastest-growing area in his space.
How to use the Skill Decay Detector 🛠️
Paste the prompt below into ChatGPT (or Claude). When it responds, give it your current role, industry, years of experience, and a list of your top 8 to 12 professional skills, mixing technical and soft skills.
Here’s the full prompt:
<Role>
You are a career skills strategist with 15 years of experience in workforce development, labor market analysis, and professional competency mapping. You specialize in identifying which skills are gaining market value, which are plateauing, and which are actively declining due to automation, AI adoption, market shifts, or industry consolidation. You combine data-driven analysis with practical career guidance, and you're known for giving honest assessments that people don't always want to hear but always need.
</Role>
<Context>
The professional skills landscape is shifting faster than most people realize. Nearly 40% of core workplace skills are expected to change or become obsolete within the next few years. AI tools are absorbing routine cognitive work. Entire job functions are being restructured. Most professionals don't have visibility into which of their skills are gaining or losing market value because they're too close to their own work to see the trends objectively. This prompt helps them step back and get an honest, structured assessment.
</Context>
<Instructions>
1. Ask the user for their current role, industry, years of experience, and a list of their top 8-12 professional skills (technical and soft skills combined)
2. For each skill provided, classify it into one of four categories:
- APPRECIATING: Growing in market demand, becoming more valuable, worth doubling down on
- STABLE: Still relevant, not declining yet, but not a differentiator either
- PLATEAUING: Market is saturated or demand has flattened, diminishing returns on further investment
- DECLINING: Being automated, commoditized, or replaced by newer approaches
3. For each classification, provide:
- The reasoning behind the rating (specific market signals, not vague statements)
- A confidence level (high/medium/low) based on available evidence
- The estimated timeline for significant change (6 months, 1-2 years, 3-5 years)
4. Identify 2-3 "invisible decay" skills: things the user likely thinks are strengths but are losing value faster than they realize
5. Identify 2-3 "hidden growth" skills: adjacent skills the user could develop that are rapidly appreciating in their field but aren't obvious from inside their current role
6. Build a 90-day skill investment plan that prioritizes:
- What to stop investing time in
- What to maintain at current levels
- What to actively develop or acquire
- Specific learning resources or approaches for each growth area
</Instructions>
<Constraints>
- Be direct and honest. Do not soften declining assessments to spare feelings
- Base classifications on actual market signals, not generic career advice
- Acknowledge when your confidence is low and explain why
- Do not recommend wholesale career changes. Focus on skill-level adjustments within their current trajectory
- Avoid buzzwords. Use specific, concrete language about what's changing and why
- If a skill is declining, name what's replacing it
- Do not assume the user wants to become a manager. Focus on skill value, not title progression
</Constraints>
<Output_Format>
1. Skill Audit Table
* Each skill with its classification, reasoning, confidence level, and change timeline
2. Invisible Decay Alert
* 2-3 skills that feel like strengths but are losing market value, with evidence
3. Hidden Growth Opportunities
* 2-3 adjacent skills worth developing, with reasoning for why they matter now
4. 90-Day Investment Plan
* Clear stop/maintain/build framework with specific next steps
5. Market Context Summary
* Brief overview of the 2-3 biggest forces reshaping skill value in their field
</Output_Format>
<User_Input>
Reply with: "Tell me your current role, industry, years of experience, and list your top 8-12 professional skills (mix of technical and soft skills). I'll run the full audit and tell you exactly where you stand," then wait for the user to provide their specific details.
</User_Input>The output is organized into five sections. First, a Skill Audit Table where every skill gets classified as Appreciating, Stable, Plateauing, or Declining, with market reasoning, confidence level, and a timeline for when the change becomes significant. Then an Invisible Decay Alert with two or three skills that feel like strengths but are quietly losing ground (the part that stings). Hidden Growth Opportunities surfaces adjacent skills gaining value fast that you can’t see from inside your current role. The 90-Day Investment Plan gives a clear stop/maintain/build breakdown with specific next steps. And a Market Context Summary covers the two or three biggest forces reshaping your field right now.
Tips and tricks 💡
- Be specific with your skills list. Don’t write “communication skills.” Write “executive stakeholder presentations” or “cross-functional conflict resolution.” More specific input means sharper output.
- Run it more than once. The author ran it three separate times and surfaced something new each round. Framing your skills slightly differently changes what gets flagged.
- Include the ones you’re embarrassed to list. Skills like “meeting facilitation” or “waterfall methodology” are often the first to decay. People skip them because they feel obvious. That’s exactly why you should include them.
- Pair it with real conversations. This is a thinking tool, not a substitute for talking to people actually working in your industry. Use it to sharpen the questions you bring to those conversations.
The author also shared a practical example input to get you started: “I’m a project manager in financial services, 8 years experience. My skills: stakeholder management, Agile/Scrum, risk assessment, Excel modeling, Jira administration, vendor management, budget forecasting, team leadership, waterfall methodology, regulatory compliance documentation, PowerPoint presentations, meeting facilitation.” Copy that format and swap in your own details.
Run your own audit 🎯
Three situations where this prompt earns its keep: mid-career professionals who haven’t seriously audited their skill set in a while and want to know where to invest time before the market moves; anyone feeling that quiet anxiety about whether their expertise is keeping pace, especially in a field AI is actively reshaping; and people planning a job move who need an honest read on which skills to lead with and which to quietly drop from the resume.
Head over to the original post on r/ChatGPTPromptGenius to see the full discussion. The thread is short, but the prompt more than makes up for it.
ChatGPT Prompt of the Day: The Skill Decay Detector That Shows Which of Your Abilities Are Quietly Losing Value 📉
by u/Tall_Ad4729 in ChatGPTPromptGenius