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Every subscription here points at a real, growing library. Find the niche you need; the plan behind it is often broader than the page — and says so.
21 subscriptions
Learning · excel skills
Spreadsheet skills for spreadsheet users: tables, references, the core formulas.
Learning · claude learning
Claude skills for knowledge workers: tags, references, quotes.
Learning · data analysis learning
Data analysis for analysts: definitions as formulas; profiling.
Learning · chatgpt learning
ChatGPT skills for daily users: rules that change outputs.
Learning · prompt engineering
Prompt engineering for assistant users: role, context, steps, format, constraints.
Learning · chatgpt learning
ChatGPT skills for professionals: checkable analysis.
Learning · excel skills
Spreadsheet skills for spreadsheet users: XLOOKUP, SUMIFS, pivots, validation.
Learning · data analysis learning
Data analysis for analysts: the message, the caveat, the page.
Learning · claude learning
Claude skills for decision-makers: judgement tasks with visible steps.
Learning · prompt engineering
Prompt engineering for teams: variables, reference runs, test sets.
Learning · chatgpt learning
ChatGPT skills for professionals: instructions, projects, saved prompts.
Learning · prompt engineering
Prompt engineering for prompt maintainers: map the failure to a part.
Learning · claude learning
Claude skills for daily users: rules and files across chats.
Learning · excel skills
Spreadsheet skills for shop owners: the workbook that proves it.
Learning · data analysis learning
Data analysis for operators: measurement first, one test.
Learning · excel skills
Spreadsheet skills for spreadsheet users: reconcile, trace, fix.
Learning · claude learning
Claude skills for operators: a project with a checklist.
Learning · prompt engineering
Prompt engineering for operators: five templates with pass rates.
Learning · chatgpt learning
ChatGPT skills for analysts: reproduce every claim.
Learning · data analysis learning
Data analysis for analysts: reviewed by a sceptic.
