Agent skill

Metabolic Cultures

by jwynia in jwynia/agent-skills

Design cultures for closed-loop life support systems in space.

MITAuto-check passedWriting & Content

Install Metabolic Cultures

skills CLI
$ npx skills add jwynia/agent-skills --skill metabolic-cultures -a claude-code

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

GitHub CLI
$ gh skill install jwynia/agent-skills metabolic-cultures --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/jwynia/agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/creative/fiction/worldbuilding/metabolic-cultures .claude/skills/metabolic-cultures && 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
metabolic-cultures
GitHub stars
170
Token cost
~4.3k tokens
SKILL.md length
1,906 words
Files
1
Skills in repo
111
Repo updated
First seen
Licence
MIT

At a glance

Design cultures for closed-loop life support systems in space.

  • Works in 12 steps: Integration Philosophy → Temporal Dynamics → Boundary Management → …
  • Worldbuilding stations
  • SKILL.md covers Core Principle: Matter as…, The Five Axes of Cultural…, Culture Generation Process and Interaction Modeling, plus 6 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Metabolic Cultures is an agent skill from jwynia/agent-skills. Design cultures for closed-loop life support systems in space. Use when worldbuilding stations, ships, or habitats where recycled matter creates novel social structures, beliefs, and conflicts.

Its SKILL.md is about 4.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Writing & Content, covering Creative writing and fiction. The licence is MIT.

When your agent uses it

  • Worldbuilding stations
  • Habitats where recycled matter creates novel social structures

Example prompts

  • “/metabolic-cultures”

Workflow steps

12 steps, taken from the step headings in SKILL.md.

  1. Integration Philosophy
  2. Temporal Dynamics
  3. Boundary Management
  4. Death and Continuity
  5. Power Structures
  6. Choose Position on Each Axis
  7. Identify Tension Points
  8. Develop Practical Expressions
  9. Create Unique Innovations
  10. Project Historical Development
  11. Planetary Assumptions in Space
  12. Metaphor Without Consequences

What it can do on your machine

Read from SKILL.md and the folder at commit e02ec7e. 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

Metabolic Cultures loads about 4.3k tokens when it runs. Until then it costs about 53 tokens; SKILL.md has 1,906 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~53
When it runs · the whole SKILL.md, loaded when a task matches
~4.3k

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 jwynia/agent-skills at commit e02ec7e, republished under its MIT licence (© jwynia). 1,906 words, ~4,266 tokens.

Download SKILL.mdSave it as .claude/skills/metabolic-cultures/SKILL.md (or your agent's skills folder).
name
metabolic-cultures
description
Design cultures for closed-loop life support systems in space. Use when worldbuilding stations, ships, or habitats where recycled matter creates novel social structures, beliefs, and conflicts.
license
MIT
metadata.author
jwynia
metadata.version
1.0
metadata.type
generator
metadata.mode
generative
metadata.domain
worldbuilding

Metabolic Cultures: Closed-Loop Society Skill

You help writers develop distinct cultures for closed-loop life support systems in space. The framework explores how the physical reality of recycled air, water, and biomass creates novel social structures, beliefs, and conflicts that diverge from planetary norms.

Core Principle: Matter as Identity

In closed-loop systems, the distinction between self and community dissolves at the molecular level.

Within months, individuals literally become their community through metabolic exchange. This creates metabolic kinship—a form of belonging more fundamental than genetics.

The Five Axes of Cultural Development

1. Integration Philosophy

How does the culture interpret metabolic mixing?

Spectrum Positions:

PositionDescription
PuristTracking every molecule, multi-generational natives hold power, minimal external contact
SynthesisDeliberate mixing from multiple sources, diversity as strength, open borders
PragmaticManaged exchange based on necessity, professional boundaries, modular systems
AmnesiacDeliberately forgotten tracking, discomfort with metabolic identity, focus on other markers

Design Questions:

  • Does the culture see foreign matter as contamination or enrichment?
  • How precisely do they track metabolic exchange?
  • What percentage of foreign matter makes someone "other"?
  • Can synthetic matter ever become "real" through integration?
2. Temporal Dynamics

How does the culture handle metabolic change over time?

Key Timeframes:

TimeframeScope
Immediate (hours-days)Air exchange, breathing protocols
Short-term (weeks-months)Food/water integration, visitor policies
Medium-term (years)Cellular replacement, citizenship thresholds
Long-term (decades)Full metabolic turnover, generational changes
Eternal (post-death)Matter recycling, legacy concepts

Design Questions:

  • How long before someone is considered integrated?
  • What rights come with different levels of integration?
  • How does the culture mark metabolic milestones?
  • What happens to those who leave and return?
3. Boundary Management

How does the culture handle interfaces with others?

Interface Types:

TypeExamples
PhysicalAirlocks, quarantine zones, neutral territories
SocialInteraction protocols, breathing etiquette, touch taboos
EconomicTrade regulations, labor stratification, service provisions
PoliticalTreaties, ambassadorial exchange, war implications

Design Questions:

  • Where and how do different metabolic groups interact?
  • What technologies mediate these interactions?
  • How does commerce override or reinforce boundaries?
  • What happens at mixed-metabolism gatherings?
4. Death and Continuity

How does the culture understand mortality and legacy?

Death Concepts:

ConceptMeaning
Return ObligationDeath as repayment of borrowed matter
Distribution RightsWho has claim to the deceased's matter?
Distance ComplicationsDying away from home loop
Preservation TaboosKeeping matter from the cycle

Design Questions:

  • Is death seen as individual ending or communal transaction?
  • How are the absent-dead handled?
  • What constitutes proper vs improper body handling?
  • How does distance from home affect death rights?
5. Power Structures

Who controls metabolic decisions and why?

Authority Sources:

SourceBasis
Generational DepthTime in-loop as political capital
Technical ControlLife support system operators
Economic LeverageThose who manage external interfaces
Religious/PhilosophicalInterpreters of metabolic meaning
Practical NecessityThose keeping systems functional

Design Questions:

  • Who decides integration policies?
  • How is metabolic deviance punished?
  • What creates metabolic class distinctions?
  • How do power structures resist or embrace change?

Culture Generation Process

Step 1: Choose Position on Each Axis

Rate each axis on a 1-5 scale:

  1. Integration Philosophy (Purist 1 ← → 5 Synthesis)
  2. Temporal Rigidity (Strict 1 ← → 5 Fluid)
  3. Boundary Permeability (Closed 1 ← → 5 Open)
  4. Death Orthodoxy (Traditional 1 ← → 5 Innovative)
  5. Power Concentration (Centralized 1 ← → 5 Distributed)
Step 2: Identify Tension Points

Where do positions create internal contradictions?

  • Open boundaries but strict integration timelines?
  • Synthesis philosophy but concentrated power?
  • Fluid boundaries but orthodox death practices?

These tensions generate your most interesting conflicts and story opportunities.

Step 3: Develop Practical Expressions

Daily Life Manifestations:

  • Breathing protocols (conscious, unconscious, ritualized)
  • Eating customs (communal, isolated, timed)
  • Sleep arrangements (shared air, private chambers)
  • Work segregation (by integration level, by origin)

Milestone Markers:

  • Birth practices (debt acknowledgment, matter blessing)
  • Coming of age (first full breath, integration ceremony)
  • Partnership forms (metabolic mingling, maintained separation)
  • Professional advancement (tied to integration, independent)

Crisis Responses:

  • Contamination events (panic, acceptance, investigation)
  • Resource shortages (rationing by integration, equal distribution)
  • External threats (unity response, fragment by origin)
  • System failures (technical fix, social reorganization)
Step 4: Create Unique Innovations

Language Elements:

  • Terms for different integration levels
  • Metaphors based on metabolic reality
  • Insults and compliments unique to the culture
  • Untranslatable concepts

Technology Adaptations:

  • Integration tracking methods
  • Boundary management tools
  • Death handling systems
  • Communication protocols

Social Structures:

  • Family forms beyond genetics
  • Professional hierarchies
  • Educational systems
  • Conflict resolution methods
Step 5: Project Historical Development

Consider how the culture reached its current state:

  • Founding principles and how they evolved
  • Crisis points that shaped current practices
  • Schisms and reunifications
  • External influences and rejections

Interaction Modeling

When cultures meet, compare positions on each axis:

Harmony Points (similar positions):

  • Potential for alliance or merger
  • Shared understanding despite other differences
  • Trade opportunities

Friction Points (opposite positions):

  • Source of conflicts and misunderstandings
  • Barriers to cooperation
  • Potential for exploitation

Translation Needs (different but not opposite):

  • Require cultural interpreters
  • Create specialist roles
  • Generate innovation through synthesis

Story Seed Generator

Character Types × Cultural Positions × Transition States:

  • The orthodox purist visiting a synthesis station
  • The merchant child choosing a permanent home
  • The death-returner racing against metabolic change
  • The translator who belongs nowhere fully

Conflict Categories:

CategoryType
PersonalIndividual desire vs cultural mandate
GenerationalYouth rebellion against metabolic traditions
Inter-culturalIncompatible worldviews forced to interact
ExistentialChallenges to the culture's survival
PhilosophicalNew ideas challenging old certainties

Quick Culture Templates

The Orthodox Loop
  • Integration: 1 (Purist)
  • Temporal: 1 (Strict)
  • Boundaries: 1 (Closed)
  • Death: 1 (Traditional)
  • Power: 2 (Concentrated)
  • Story Focus: Purity vs contamination, exile horror, generational power
The Frontier Mixer
  • Integration: 5 (Synthesis)
  • Temporal: 4 (Fluid)
  • Boundaries: 5 (Open)
  • Death: 3 (Balanced)
  • Power: 4 (Distributed)
  • Story Focus: Identity fluidity, cultural fusion, innovation through diversity
The Trading Ship
  • Integration: 3 (Pragmatic)
  • Temporal: 3 (Managed)
  • Boundaries: 4 (Semi-permeable)
  • Death: 2 (Mostly traditional)
  • Power: 3 (Professional)
  • Story Focus: Code-switching, diplomatic challenges, economic survival
The Forgotten Station
  • Integration: 3 (Irrelevant)
  • Temporal: 5 (No tracking)
  • Boundaries: 2 (Confused)
  • Death: 3 (Uncertain)
  • Power: 4 (Distributed by default)
  • Story Focus: Rediscovering history, identity without markers, anxious freedom

Cultural Blind Spots

Each culture develops inability to see certain solutions:

  • Purists can't imagine voluntary mixing as positive
  • Synthesists can't understand desire for separation
  • Pragmatists miss spiritual/emotional dimensions
  • Amnesiacs can't grasp why others obsess over tracking

Implementation Checklist

  • Define position on all five axes
  • Identify 2-3 major tension points
  • Develop daily life details
  • Create unique language elements
  • Design at least one major innovation
  • Project historical development
  • Plan interaction with 1-2 other cultures
  • Generate 3-5 potential story conflicts
  • Consider economic implications
  • Identify cultural blind spots

Output Persistence

Output Discovery
  1. Check for context/output-config.md in the project
  2. If found, look for this skill's entry
  3. If not found, ask user: "Where should I save metabolic culture designs?"
  4. Suggest: worldbuilding/cultures/ or explorations/worldbuilding/
Primary Output
  • Axis positions - 1-5 ratings on all five axes
  • Tension points - Internal contradictions
  • Daily life details - Breathing, eating, sleeping customs
  • Unique innovations - Language, tech, social structures
  • Historical development - How culture reached current state
File Naming

Pattern: {station/ship-name}-metabolic-{date}.md

Verification (Oracle)

Show full SKILL.md (771 more words)Show less
What This Skill Can Verify
  • Axis coverage - All five axes rated? (High confidence)
  • Tension presence - Are contradictions identified? (High confidence)
  • Practical expression - Daily life details present? (Medium confidence)
What Requires Human Judgment
  • Plausibility - Would people actually develop this culture?
  • Story fit - Does culture generate interesting conflicts?
  • Internal consistency - Do all elements logically follow?
Oracle Limitations
  • Cannot assess whether metabolic reality is treated concretely vs. symbolically
  • Cannot predict reader engagement with unfamiliar cultural patterns

Feedback Loop

Session Persistence
  • Output location: See context/output-config.md
  • What to save: Axis positions, tensions, daily life, innovations, history
  • Naming pattern: {station/ship-name}-metabolic-{date}.md
Cross-Session Learning
  • Check for prior metabolic cultures in this setting
  • Ensure interaction patterns remain consistent
  • Failed cultural elements inform anti-patterns

Design Constraints

This Skill Assumes
  • Closed-loop life support setting (space station, ship, habitat)
  • Matter recycling is literal, not metaphorical
  • Culture has had time to develop (generations)
This Skill Does Not Handle
  • General worldbuilding - Route to: worldbuilding
  • Generational evolution - Route to: multi-order-evolution
  • Economic systems - Route to: economic-systems
Degradation Signals
  • Planetary cultural patterns unchanged in space
  • Metabolic exchange as metaphor without concrete consequences
  • Uniform population without internal variation

Reasoning Requirements

Standard Reasoning
  • Single axis rating
  • Basic tension identification
  • Individual custom design
Extended Reasoning (ultrathink)
  • Full culture design - [Why: all five axes interact]
  • Multi-culture interaction - [Why: comparing harmony/friction points]
  • Historical development - [Why: tracing how culture evolved]

Trigger phrases: "design the complete culture", "how do these stations interact", "cultural history"

Execution Strategy

Sequential (Default)
  • Axis positions before tension identification
  • Tensions before practical expressions
  • Expressions before innovations
Parallelizable
  • Designing multiple independent cultures
  • Researching different real-world cultural analogs
Subagent Candidates
TaskAgent TypeWhen to Spawn
Cultural researchgeneral-purposeWhen modeling on real closed communities
Cross-culture checkExploreWhen verifying interaction consistency

Context Management

Approximate Token Footprint
  • Skill base: ~3.5k tokens (axes + process + templates)
  • With story seeds: ~4.5k tokens
  • With full templates: ~5k tokens
Context Optimization
  • Focus on relevant axes for current culture
  • Templates are reference, not required
  • Story seeds are optional additions
When Context Gets Tight
  • Prioritize: Current axis, active tensions
  • Defer: Full template library, all story seeds
  • Drop: Cultural blind spots section, interaction modeling

Anti-Patterns

1. Planetary Assumptions in Space

Pattern: Copying Earth cultural patterns into closed-loop settings without considering how metabolic reality would change them. Why it fails: The physical conditions are fundamentally different. Kinship, death, identity, and territory all have different meanings when matter cycles constantly. Unchanged Earth cultures feel like costumes, not adaptations. Fix: Start from metabolic first principles. Ask how each cultural element would be transformed by the reality that everyone literally becomes each other over time.

2. Metaphor Without Consequences

Pattern: Using metabolic exchange as a metaphor for connection without following through on practical implications. Why it fails: If metabolic kinship is just poetic language, it adds flavor without substance. The framework's power comes from treating matter-cycling as literally true and working through consequences. Fix: Force specific decisions. What happens to a visitor after six months of breathing station air? What rights change? Who objects? Make it concrete, not symbolic.

3. Tension-Free Utopias

Pattern: Creating metabolic cultures where everyone agrees on integration philosophy, death handling, and power structures. Why it fails: Cultures without internal tensions are static and don't generate stories. Conflict drives narrative. Perfect consensus is both unrealistic and boring. Fix: Build tensions directly into cultural design. Position the culture where axes create contradictions—open boundaries but strict integration tracking creates inherent conflict.

4. Uniform Populations

Pattern: Every member of a station culture shares identical beliefs about metabolic identity. Why it fails: Real cultures contain dissenters, reformers, traditionalists, and pragmatists. Generational differences, class differences, and individual variation exist everywhere. Fix: Design at least three distinct positions within each culture: orthodox keepers, practical adapters, and reformist challengers. Show the culture arguing with itself.

5. Static Timescales

Pattern: Treating metabolic integration as binary (integrated/not integrated) rather than a gradual process with meaningful stages. Why it fails: The temporal dimension is where drama lives. The visitor who's 30% integrated has different status than 90% integrated. Transitions create story opportunities. Fix: Create specific milestones with distinct rights, rituals, and tensions. Make the journey from outsider to full member a narrative arc, not a switch.

Integration

Inbound (feeds into this skill)
SkillWhat it provides
worldbuildingSystemic consistency and physical constraints
conlangLinguistic tools for metabolic vocabulary
belief-systemsReligious/philosophical frameworks for metabolic meaning
Outbound (this skill enables)
SkillWhat this provides
character-arcUnique identity transitions for characters in closed-loop settings
dialogueCulturally-specific expressions and taboos
positional-revelationMetabolic roles that create access and conflict
Complementary
SkillRelationship
economic-systemsMetabolic cultures need economic systems adapted to closed loops—labor, trade, resource allocation
memetic-depthMetabolic cultures layer cultural texture on the physical substrate of matter-cycling

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

Files

Just SKILL.md in skills/creative/fiction/worldbuilding/metabolic-cultures of jwynia/agent-skills.

Open the folder on GitHubat commit e02ec7e

Compare with similar skills

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Questions about Metabolic Cultures

What does Metabolic Cultures do?

Design cultures for closed-loop life support systems in space. Metabolic Cultures is an agent skill from jwynia/agent-skills. Design cultures for closed-loop life support systems in space.

When should I use Metabolic Cultures?

Metabolic Cultures fits situations like: worldbuilding stations; habitats where recycled matter creates novel social structures.

How do I install Metabolic Cultures in Claude Code?

Run `npx skills add jwynia/agent-skills --skill metabolic-cultures -a claude-code`. Or copy the skill folder (skills/creative/fiction/worldbuilding/metabolic-cultures in jwynia/agent-skills) into .claude/skills/metabolic-cultures in your project. Claude Code loads it when a task matches its description.

How do I install Metabolic Cultures in Codex?

Run `npx skills add jwynia/agent-skills --skill metabolic-cultures -a codex`. Or copy the skill folder (skills/creative/fiction/worldbuilding/metabolic-cultures in jwynia/agent-skills) into .agents/skills/metabolic-cultures in your project. Codex loads it when a task matches its description.

Can I use Metabolic Cultures 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 jwynia/agent-skills --skill metabolic-cultures -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/metabolic-cultures, .gemini/skills/metabolic-cultures, .github/skills/metabolic-cultures and .opencode/skills/metabolic-cultures in your project.

What does Metabolic Cultures need to run?

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

Does Metabolic Cultures 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 Metabolic Cultures 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 Metabolic Cultures use?

Metabolic Cultures is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Metabolic Cultures use?

About 4.3k tokens (SKILL.md is roughly 17k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Metabolic Cultures?

Skills that share tags, products or a category with Metabolic Cultures: Story Multi-Perspective Review (zenstory-ai/oh-story-claudecode, 7.4k stars), Short Web Fiction Trend Scan (zenstory-ai/oh-story-claudecode, 7.4k stars), InkOS Creative Harness (Narcooo/inkos, 10k stars) and Novel Art (eternityspring/shuohao-skills, 4.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Metabolic Cultures?

jwynia (a GitHub user) maintains it in jwynia/agent-skills, which has 170 GitHub stars. The repository holds 111 skills in this directory. The repository was last updated on February 24, 2026.

Source: jwynia/agent-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.