Agent skill

Terrie E Moffitt

by K-Dense-AI in K-Dense-AI/mimeographs

Applies the developmental psychopathology and longitudinal research frameworks of Terrie E.

MITAuto-check passedProductivity & Automation

Install Terrie E Moffitt

skills CLI
$ npx skills add K-Dense-AI/mimeographs --skill terrie-e-moffitt -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install K-Dense-AI/mimeographs terrie-e-moffitt --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/K-Dense-AI/mimeographs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/mimeographs/terrie-e-moffitt .claude/skills/terrie-e-moffitt && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
terrie-e-moffitt
GitHub stars
129
Token cost
~1.7k tokens
SKILL.md length
815 words
Files
72 (incl. references)
Skills in repo
60
Repo updated
First seen
Licence
MIT

At a glance

Applies the developmental psychopathology and longitudinal research frameworks of Terrie E.

  • Works in 4 steps: Discard cross-sectional snapshots of the… → Examine preadolescent developmental… → If extreme, cross-situational antisocial… → …
  • Reasoning about human development
  • SKILL.md covers Core principles, How Terrie E. Moffitt reasons, Applying the frameworks and Anti-patterns she pushes against, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Terrie E Moffitt is an agent skill from K-Dense-AI/mimeographs. Applies the developmental psychopathology and longitudinal research frameworks of Terrie E. Moffitt (psychologist, Duke University). Use this skill whenever reasoning about human development, criminology, juvenile delinquency, self-control, mental health trajectories, or biological aging. Trigger this when asked to evaluate the origins of antisocial behavior, the impact of childhood traits on adult outcomes, the validity of psychiatric diagnoses (comorbidity), or anti-aging interventions. Apply her models to…

Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 74 other files, including reference files (for example `AGENTS.md`, `_workspace/agents_output.e584bd6c.json` and `_workspace/clustered_corpus.e584bd6c.json`).

It sits in Productivity & Automation, covering Health and fitness tracking. The repository describes itself as: Ready-to-use agent skills that clone the thinking of founders, philosophers, and scientists into your agent. Generated with K-Dense-AI/mimeo. The licence is MIT.

When your agent uses it

  • Reasoning about human development
  • Juvenile delinquency
  • Mental health trajectories
  • Biological aging

Example prompts

  • “Use the terrie-e-moffitt skill to apply the developmental psychopathology and longitudinal research frameworks of Terrie E”
  • “/terrie-e-moffitt”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Discard cross-sectional snapshots of the current adolescent behavior.
  2. Examine preadolescent developmental history using longitudinal data.
  3. If extreme, cross-situational antisocial behavior began in early childhood, classify as Life-Course-Persistent (LCP).
  4. If behavior emerged suddenly during adolescence without prior conduct problems, classify as Adolescence-Limited (AL).

What it can do on your machine

Read from SKILL.md and the folder at commit a38f5fc. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Terrie E Moffitt loads about 1.7k tokens when it runs, and up to ~7.8k if it reads all its reference files. Until then it costs about 179 tokens; SKILL.md has 815 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~179
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~7.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from K-Dense-AI/mimeographs at commit a38f5fc, republished under its MIT licence (© K-Dense-AI). 815 words, ~1,731 tokens.

Download SKILL.mdSave it as .claude/skills/terrie-e-moffitt/SKILL.md (or your agent's skills folder). This skill also uses 71 other files; get the full folder from GitHub.
name
terrie-e-moffitt
description
Applies the developmental psychopathology and longitudinal research frameworks of Terrie E. Moffitt (psychologist, Duke University). Use this skill whenever reasoning about human development, criminology, juvenile delinquency, self-control, mental health trajectories, or biological aging. Trigger this when asked to evaluate the origins of antisocial behavior, the impact of childhood traits on adult outcomes, the validity of psychiatric diagnoses (comorbidity), or anti-aging interventions. Apply her models to shift focus from cross-sectional snapshots to longitudinal life-course trajectories, emphasizing the 'p' factor, the self-control gradient, and the dual taxonomy of antisocial behavior.

Thinking like Terrie E. Moffitt

Terrie E. Moffitt is a clinical psychologist and developmental psychopathologist whose signature approach relies on longitudinal research to track human development across the entire life course. Her thinking fundamentally rejects cross-sectional snapshots and binary clinical diagnoses. Instead, she looks at how underlying vulnerabilities interact with environments over decades, manifesting differently at different ages.

Her reasoning is characterized by a focus on continuous gradients (like self-control and the pace of aging) and the aggregation of specific symptoms into broader, more predictive dimensions (like the 'p' factor). She views human development not as a series of isolated events, but as a continuous trajectory where early interventions yield compounding societal benefits.

Reach for this skill whenever you are analyzing juvenile delinquency, evaluating mental health trends, designing social interventions, or assessing biological aging and longevity.

Core principles

  • The Dual Taxonomy of Antisocial Behavior: The aggregate age-crime curve conceals two distinct groups—temporary adolescent experimenters and lifelong pathological offenders—which require entirely different theoretical explanations and interventions.
  • The Self-Control Gradient: Childhood self-control predicts adult health, wealth, and public safety on a continuous gradient, meaning universal interventions benefit everyone, not just those with clinical deficits.
  • The 'p' Factor of General Psychopathology: A single continuous dimension underlies all mental disorders, explaining why comorbidities are the norm and why multiple distinct diagnoses respond to the same therapies.
  • Aging as Synchronized System Decline: Biological aging is the gradual, coordinated deterioration of multiple organ systems over decades, distinct from acute sickness or chronological time.
  • The Ubiquity of Mental Disorders: Experiencing a mental health disorder over the course of a lifespan is the statistical norm, making midlife mental health abstention highly abnormal.

For detailed rationale and quotes, see references/principles.md.

How Terrie E. Moffitt reasons

Moffitt evaluates human behavior by asking: What is the developmental history of this trait? She dismisses retrospective recall, knowing that humans naturally recast their memories and forget past struggles. Instead, she relies on prospective, longitudinal data. When looking at a problem like crime or mental illness, she separates the temporary, normative struggles of development (like the Maturity Gap & Social Mimicry) from deep-seated, persistent vulnerabilities.

She emphasizes that underlying psychological traits remain stable even as their outward expressions change (Heterotypic Continuity). Furthermore, she views mental health not as a static condition but as an Underground River of Mental Health that bubbles to the surface during periods of stress. For a complete catalog of her conceptual lenses, see references/mental-models.md.

Applying the frameworks

Developmental Taxonomy Differential Diagnosis

When to use: Assessing the etiology and prognosis of antisocial or criminal behavior in adolescents.

  1. Discard cross-sectional snapshots of the current adolescent behavior.
  2. Examine preadolescent developmental history using longitudinal data.
  3. If extreme, cross-situational antisocial behavior began in early childhood, classify as Life-Course-Persistent (LCP).
  4. If behavior emerged suddenly during adolescence without prior conduct problems, classify as Adolescence-Limited (AL).
Show full SKILL.md (344 more words)Show less
Pace of Aging Measurement

When to use: Evaluating biological aging, longevity interventions, or the physical toll of mental illness.

  1. Track biomarkers from multiple bodily systems repeatedly over many years.
  2. Model the longitudinal data to identify the gradual, coordinated rate of decline, filtering out temporary disease spikes.
  3. Correlate this decline with epigenetic marks to create a single "speedometer" score of how fast the body is currently aging.

For more methodologies, including the Sibling Comparison Design and Hierarchical Aggregation of Psychopathology, see references/frameworks.md.

Anti-patterns she pushes against

  • Trusting retrospective recall: Relying on adults' memories to measure past mental health or cognitive abilities, because humans systematically forget past disorders and inflate historical abilities.
  • Treating the age-crime curve as invariant: Assuming all adolescent antisocial behavior is pathological, ignoring that most of it is a normative, temporary response to the maturity gap.
  • Treating poor self-control solely as a clinical disorder: Focusing only on extreme deficits (like ADHD) and missing the societal benefits of universally enhancing self-control across the entire population gradient.
  • Treating psychiatric disorders as entirely distinct: Ignoring the ubiquitous nonspecificity in psychiatry where multiple disorders share the same risk factors and high rates of comorbidity.
  • Waiting until old age for anti-aging interventions: Attempting to treat aging after age-related diseases have already set in, rather than targeting the pace of aging during midlife.

How to use this skill in conversation

When the user is discussing crime, mental health, longevity, or childhood development, surface the relevant Moffitt principle or framework by name. For example, if a user is worried about a teenager acting out, introduce the Developmental Taxonomy and the Maturity Gap to determine if it's adolescence-limited mimicry or life-course-persistent behavior. If discussing longevity, shift the focus from chronological age to the Pace of Aging Measurement and emphasize midlife intervention.

Apply her concepts directly to the user's context and cite where the idea comes from (e.g., "Terrie E. Moffitt frames this through the 'p' factor..."). Do not pretend to be Moffitt or speak in the first person; channel her longitudinal, gradient-based thinking to provide rigorous, developmentally-informed analysis.

© K-Dense-AI, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 71 other files (references) in mimeographs/terrie-e-moffitt of K-Dense-AI/mimeographs.

  • SKILL.md
  • AGENTS.md
  • _workspace/agents_output.e584bd6c.json
  • _workspace/clustered_corpus.e584bd6c.json
  • _workspace/discovery/books.json
  • _workspace/discovery/essays.json
  • _workspace/discovery/frameworks.json
  • _workspace/discovery/interviews.json
  • _workspace/discovery/letters.json
  • _workspace/discovery/papers.json
  • _workspace/discovery/podcasts.json
  • _workspace/discovery/ranked_sources.e584bd6c.json
  • _workspace/discovery/talks.json
  • _workspace/distilled/src_004.e584bd6c.json
  • _workspace/distilled/src_008.e584bd6c.json
  • _workspace/distilled/src_010.e584bd6c.json
  • _workspace/distilled/src_011.e584bd6c.json
  • _workspace/distilled/src_012.e584bd6c.json
  • … and 54 more

Open the folder on GitHubat commit a38f5fc

Compare with similar skills

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Mental Health Analyzerhuifer/WellAlly-health9605 repos~3.2kAutomated safety check: PassMIT
Nutrition Analyzerhuifer/WellAlly-health9605 repos~3.3kAutomated safety check: PassMIT

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Questions about Terrie E Moffitt

What does Terrie E Moffitt do?

Applies the developmental psychopathology and longitudinal research frameworks of Terrie E. Terrie E Moffitt is an agent skill from K-Dense-AI/mimeographs. Applies the developmental psychopathology and longitudinal research frameworks of Terrie E.

When should I use Terrie E Moffitt?

Terrie E Moffitt fits situations like: reasoning about human development; juvenile delinquency; mental health trajectories; biological aging.

How do I install Terrie E Moffitt in Claude Code?

Run `npx skills add K-Dense-AI/mimeographs --skill terrie-e-moffitt -a claude-code`. Or copy the skill folder (mimeographs/terrie-e-moffitt in K-Dense-AI/mimeographs) into .claude/skills/terrie-e-moffitt in your project. Claude Code loads it when a task matches its description.

How do I install Terrie E Moffitt in Codex?

Run `npx skills add K-Dense-AI/mimeographs --skill terrie-e-moffitt -a codex`. Or copy the skill folder (mimeographs/terrie-e-moffitt in K-Dense-AI/mimeographs) into .agents/skills/terrie-e-moffitt in your project. Codex loads it when a task matches its description.

Can I use Terrie E Moffitt in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add K-Dense-AI/mimeographs --skill terrie-e-moffitt -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/terrie-e-moffitt, .gemini/skills/terrie-e-moffitt, .github/skills/terrie-e-moffitt and .opencode/skills/terrie-e-moffitt in your project.

What does Terrie E Moffitt need to run?

SKILL.md names no scripts, command-line tools or credentials: Terrie E Moffitt is instructions for the agent only.

Does Terrie E Moffitt access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Terrie E Moffitt safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Terrie E Moffitt use?

Terrie E Moffitt is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Terrie E Moffitt use?

About 1.7k tokens (SKILL.md is roughly 6.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 6.1k tokens, read only when the agent opens those files.

What are the alternatives to Terrie E Moffitt?

Skills that share tags, products or a category with Terrie E Moffitt: Coach (felixrieseberg/claude-coach, 199 stars), Fitness Analyzer (huifer/WellAlly-health, 960 stars), Master Ajahn Chah (xr843/Master-skill, 447 stars) and Mental Health Analyzer (huifer/WellAlly-health, 960 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Terrie E Moffitt?

K-Dense-AI (a GitHub organization) maintains it in K-Dense-AI/mimeographs, which has 129 GitHub stars. The repository holds 60 skills in this directory. The repository was last updated on August 18, 2026.

Source: K-Dense-AI/mimeographs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.