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Cohort Analysis

CommunityPopular
phuryn
cohort-analysis

Perform cohort analysis on user engagement data — retention curves, feature adoption trends, and segment-level insights. Use when analyzing user retention by cohort, studying feature adoption over time, investigating churn patterns, or identifying engagement trends.

Overview

Publisherphuryn
Repositorypm-skills
Skill namecohort-analysis
Stars
26.4K
Forks
2.8K
Bundled files
Instructions only
LicenseMIT
Links
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • Self-contained

    Everything the model needs lives in the instructions — no extra files to sync.

  • Open source

    Published by phuryn on GitHub. Read the source before you install it.

Installation

Install the Cohort Analysis AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/phuryn/pm-skills.git /tmp/pm-skills
mkdir -p .claude/skills
cp -r /tmp/pm-skills/pm-data-analytics/skills/cohort-analysis .claude/skills/cohort-analysis
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Cohort Analysis in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Cohort Analysis on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Cohort Analysis is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Cohort Analysis & Retention Explorer

Purpose

Analyze user engagement and retention patterns by cohort to identify trends in user behavior, feature adoption, and long-term engagement. Combine quantitative insights with qualitative research recommendations.

How It Works

Step 1: Read and Validate Your Data

  • Accept CSV, Excel, or JSON data files with user cohort information
  • Verify data structure: cohort identifier, time periods, engagement metrics
  • Check for missing values and data quality issues
  • Summarize key statistics (cohort sizes, date ranges, metrics available)

Step 2: Generate Quantitative Analysis

  • Calculate cohort retention rates and engagement trends
  • Identify retention curves, drop-off patterns, and anomalies
  • Compute feature adoption rates across cohorts
  • Calculate month-over-month or period-over-period changes
  • Generate Python analysis scripts using pandas and numpy if requested

Step 3: Create Visualizations

  • Generate retention heatmaps (cohorts vs. time periods)
  • Create line charts showing cohort progression
  • Build comparison charts for feature adoption
  • Visualize drop-off points and engagement trends
  • Output as interactive charts or static images

Step 4: Identify Insights & Patterns

  • Spot one or more significant patterns:
    • Early churn in specific cohorts
    • Late-stage engagement changes
    • Feature adoption clusters
    • Seasonal or temporal trends
  • Highlight surprising findings and deviations
  • Compare cohort performance to establish baselines

Step 5: Suggest Follow-Up Research

  • Recommend qualitative research methods:
    • Targeted user interviews with churning users
    • Feature usage surveys with engaged cohorts
    • Session replays of key interaction patterns
    • Win/loss analysis for high vs. low retention cohorts
  • Design follow-up quantitative studies
  • Suggest A/B tests or feature experiments

Usage Examples

Example 1: Upload CSV Data

Upload cohort_engagement.csv with columns: cohort_month, weeks_active,
user_id, feature_x_usage, engagement_score

Request: "Analyze retention patterns and identify why Q4 2025 cohorts
underperform compared to Q3"

Example 2: Describe Data Format

"I have monthly user cohorts from Jan-Dec 2025. Each row shows:
cohort date, user ID, purchase frequency, and support tickets.
Analyze which cohorts show best long-term retention."

Example 3: Feature Adoption Analysis

Upload feature_usage.xlsx with cohort adoption data.

Request: "Compare adoption curves for our new feature across cohorts.
Which cohorts adopted fastest? Any patterns?"

Key Capabilities

  • Data Reading: Import CSV, Excel, JSON, SQL query results
  • Retention Analysis: Calculate and visualize retention rates over time
  • Cohort Comparison: Compare metrics across cohort groups
  • Anomaly Detection: Flag unusual patterns or drop-offs
  • Python Scripts: Generate reusable analysis code for ongoing analysis
  • Visualizations: Create heatmaps, charts, and interactive dashboards
  • Research Design: Suggest targeted follow-up studies and interview approaches
  • Statistical Summary: Provide quantitative metrics and correlation analysis

Tips for Best Results

  1. Include time dimension: Provide data across multiple time periods
  2. Define cohort clearly: Make cohort grouping explicit (signup month, feature launch date, etc.)
  3. Provide context: Explain product changes, launches, or events during the period
  4. Multiple metrics: Include retention, engagement, feature usage, revenue, etc.
  5. Sufficient data: At least 3-4 cohorts for meaningful pattern identification
  6. Request specific output: Ask for visualizations, Python scripts, or research recommendations

Output Format

You'll receive:

  • Data Summary: Cohort overview and data quality assessment
  • Quantitative Findings: Key metrics, retention rates, and trend analysis
  • Visualizations: Charts showing retention curves, adoption patterns
  • Pattern Identification: 2-3 significant insights from the data
  • Research Recommendations: Specific qualitative and quantitative follow-ups
  • Analysis Scripts (if requested): Python code for reproducible analysis
  • Next Steps: Prioritized actions based on findings

Further Reading

Frequently asked questions

What does the Cohort Analysis AI skill do?

Perform cohort analysis on user engagement data — retention curves, feature adoption trends, and segment-level insights. Use when analyzing user retention by cohort, studying feature adoption over time, investigating churn patterns, or identifying engagement trends.

Why use Cohort Analysis on TypingMind?

Because you install it once and use it with any model. Cohort Analysis is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Cohort Analysis in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/phuryn/pm-skills/tree/main/pm-data-analytics/skills/cohort-analysis. TypingMind reads its SKILL.md and installs it as a skill you can enable per chat.

Which AI models can use Cohort Analysis?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Cohort Analysis?

As many as you like. As long as a model supports skills, you can use Cohort Analysis with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Cohort Analysis AI skill free?

Yes. It is published on GitHub by phuryn under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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