Character Entities

VerifiedSafe

Core system for managing playable and non-playable character entities with identity, location, inventory, and relationships. Defines fundamental patterns for character representation in virtual worlds.

Sby Skills Guide Bot
Data & AIIntermediate
3/4/2026
Claude CodeCursorCodex
#character-state#yaml-schema#world-modeling#entity-relationships#state-ownership

Recommended for

Automated summary

Defines the YAML conventions for representing a character in a MOO-style world: the split between file home and runtime location, canonical state ownership, directory layout and inter-entity relationships.

Strengths

  • Draws a clean line between `home` (file path, never moves) and `location` (runtime position), keeping git diffs stable.
  • Makes CHARACTER.yml the source of truth for location, inventory, gold, traits, relationships and memories, with world files as optional mirrors only.
  • Gives concrete directory rules: directory plus CHARACTER.yml when a character needs item storage, a single file when it just lives in a room.
  • Models relationships keyed by entity ID with feeling, memories and hopes — compact and readable.

Limitations

  • A convention document only: no validation, tooling or migration path when canonical state and its mirror disagree.
  • Tightly coupled to the MOOLLM ecosystem; assumes the card, room and adventure skills already exist.
  • The CARD.yml sidecar is mentioned and deferred to another skill without being specified here.
When to use it

Use it when modelling a new player, NPC or companion and you need to decide where its state lives and how to record its relationships.

When not to use it

Avoid it when you need an executable state machine or validation logic rather than a file-layout convention.

Security analysis

Safe
Quality score82/100

The skill is documentation for a world/character simulation system. It only declares read_file and write_file, and all described operations concern editing YAML/Markdown state files within the character/adventure directory structure. There are no shell commands, network calls, credential access, encoded payloads, or destructive operations; the content is purely narrative data modeling.

No concerns found

How this analysis is made

Examples

New pub NPC
Create a CHARACTER.yml for a new bartender NPC in the pub room: give it a home, a starting location, a short inventory and a relationship entry toward don-hopkins.
Directory or single file
Should the stray cat in the cat cave get its own characters/ directory or stay as pub/cat-cave/terpie.yml? Decide using the character skill's belonging-vs-visiting rule.
State update precedence
Don just picked up a lamp and moved to the coatroom. Update the canonical state in the correct file and tell me whether ADVENTURE.yml needs a mirror update too.

name: character description: Core patterns for all characters — home, location, relationships, inventory allowed-tools:

  • read_file
  • write_file tier: 1 protocol: CHARACTER-AS-ENTITY related: [cat, dog, society-of-mind, persona, room, buff, needs, mind-mirror, incarnation, party] tags: [moollm, entity, location, relationships, inventory, identity]

Character

"File is identity. Location is presence. Relationships are memory."

Characters are entities that exist in the world. Players, NPCs, companions, cats — all are characters.

Home vs Location

The critical distinction:

player:
  home: characters/don-hopkins/   # Where FILE lives (never moves)
  location: pub/                  # Where CHARACTER is (changes)

| Concept | Purpose | Changes? | |---------|---------|----------| | home | Physical file path | NEVER | | location | Current position in world | Runtime |

Why: Stability, safety, git-friendly diffs.

Character State Ownership (CANONICAL vs MIRROR)

Characters own their own state. The CHARACTER.yml file is CANONICAL for:

| State | Stored In | Notes | |-------|-----------|-------| | location | CHARACTER.yml | Where the character is in the world | | inventory | CHARACTER.yml | What the character carries | | gold | CHARACTER.yml | Character's resources | | sims_traits | CHARACTER.yml | Personality (Sims-style) | | mind_mirror | CHARACTER.yml | Personality (Leary-style) | | relationships | CHARACTER.yml | Who they know and feel about | | memories | CHARACTER.yml | What they remember |

ADVENTURE.yml (or other world state files) may MIRROR some state for convenience, but CHARACTER.yml is always the source of truth.

# CHARACTER.yml (CANONICAL — edit this first)
player:
  location: coatroom/  # CANONICAL — character owns their location
  inventory: [lamp]    # CANONICAL — character owns their inventory

# ADVENTURE.yml (MIRROR — optional convenience copy)
player:
  location: coatroom/  # Mirror of CHARACTER.yml

When updating state:

  1. Edit CHARACTER.yml first (canonical)
  2. Optionally update ADVENTURE.yml mirror for convenience
  3. If conflict, CHARACTER.yml wins

Why this matters:

  • Characters can be used across multiple adventures
  • Character state persists independent of adventure state
  • Clear ownership prevents conflicts

Directory Structure

Players (Need Junk Storage)

characters/
  don-hopkins/           # Directory name = character ID
    CHARACTER.yml        # The character file
    CARD.yml             # Optional: makes character a playable card
    cookie-1.yml         # Dispensed items
    notes.yml            # Personal stuff

Sidecar Cards

Any character directory can have a CARD.yml sidecar to make the character card-playable:

# characters/don-hopkins/CARD.yml
card:
  for: ./CHARACTER.yml
  type: hero-story
  tradition: "Pie menus, SimCity, constructionism"
  
  advertisements:
    SUMMON:
      description: "Activate Don's design traditions"

See card skill for full pattern.

Embedded NPCs (Room is Home)

pub/
  bartender.yml          # Lightweight NPC
  cat-cave/
    terpie.yml           # Full family as single files
    stroopwafel.yml
    kitten-myrcene.yml

Rule: Need junk storage? → directory/CHARACTER.yml. Just a character in a room? → character-name.yml.

File Belonging

"Does this character BELONG to a place, or VISIT places?"

| Type | Home | Examples | |------|------|----------| | Belongs | Room directory | pub/bartender.yml, maze/skeleton.yml | | Visits | Own directory/repo | characters/don.yml, github:user/char.yml |

Relationships

Key = other entity ID. From is implicit (file owner).

# In marieke.yml
relationships:
  don-hopkins:
    feeling: "A regular now. One of the good ones."
    memories:
      - "The day he sat with Myr for three hours"
    hopes: "I hope he keeps coming back."
    
  self:  # Private inner data!
    identity: "Third generation. This is who I am."
    fears: "That I'm not enough."
    mantra: "The cats need me. I need them."

Targets

Relationships can point to anything:

  • Characters (don-hopkins)
  • Objects (brass-lamp)
  • Locations (pub/, maze/)
  • Concepts (acme-corporation)
  • Yourself (self) — private storage!

Levels

| Level | Score | Effect | |-------|-------|--------| | Stranger | 0-15 | -10% success, 50% effects | | Familiar | 41-60 | +10% success, 100% effects | | Friend | 61-80 | +20% success, greetings | | Soulmate | 91-100 | +50% success, psychic link |

Inventory (Bidirectional)

Objects stay in their home. Picking up = references, not file moves.

# Don picks up kitten:

# In don-hopkins.yml
inventory:
  - pub/cat-cave/kitten-myrcene.yml
  
# In kitten-myrcene.yml
location: characters/don-hopkins/inventory

# File didn't move. Location changed.

Reset: Snap objects back home: location = home.

Inventory Protocol (Objects vs Refs)

Items in inventory can be OBJECTS or REFS:

| Type | Weight | Bulk | What It Is | |------|--------|------|------------| | Object | Yes | Yes | The actual item (lamp, sword, lunchbox) | | Ref | No | No | Lightweight pointer to a prototype |

Refs are perfect for: catalogs, manuals, maps, guides — things you reference but don't physically carry.

inventory:
  # Full object
  - item: "Brass Lantern"
    type: object
    source: start/lamp.yml
    weight: 2
    fuel: 100
    
  # Lightweight ref
  - item: "ACME Catalog"
    type: ref
    prototype: street/lane-neverending/w1/acme-catalog.yml
    annotations: ["circled portable hole", "margin notes on physics"]

Dispenser Protocol

Some objects dispense refs (like the ACME Catalog Dispenser):

  1. TEAR OFF / TAKE at dispenser
  2. Receive REF in inventory (weight: 0)
  3. REF points to prototype for full content
  4. REF can accumulate instance-specific data (annotations, condition)

Drop Protocol

When dropping a ref in a room:

  1. Remove from inventory
  2. Create pointer file in room directory: [item-name].yml
  3. Pointer contains: prototype path, dropped_by, condition, annotations
  4. Item now lives in that room (can be picked up again)
# kitchen/acme-catalog.yml — dropped instance
object:
  name: "ACME Catalog"
  type: instance
  prototype: ../street/lane-neverending/w1/acme-catalog.yml
  origin: "Torn from dispenser at 4 Lane Neverending"
  dropped_by: "don-hopkins"
  annotations: ["DO NOT ORDER Rocket Skates", "circled portable hole"]

Capacity

inventory_capacity:
  max_weight: 45    # Varies by character
  max_bulk: 10
  refs_free: true   # Refs don't count!

Dispensers (Full Objects)

Some objects clone full objects on pickup. Original stays, you get instance.

# pub/cookie-jar.yml
object:
  id: cookie-jar
  dispenser: true
  instance_template: cookie

When picked up:

  1. Original stays
  2. Instance created: characters/don-hopkins/cookie-1.yml
  3. Instance inherits from prototype

Ephemeral vs Persistent

| Type | File? | Use For | |------|-------|---------| | Ephemeral | No | Quick transaction, one-line dialog | | Persistent | Yes | Ongoing negotiation, relationship state |

Rule: Will this matter in 5 minutes? No → ephemeral. Yes → persistent.

Stats

Two systems:

| System | Scale | Origin | |--------|-------|--------| | Sims Traits | 0-10 | The Sims 1 | | Mind Mirror | 0-7 | Timothy Leary |

Sims Traits

  • Neat — Sloppy ↔ Organized
  • Outgoing — Shy ↔ Social
  • Active — Lazy ↔ Energetic
  • Playful — Serious ↔ Fun-loving
  • Nice — Grouchy ↔ Kind

Distribution: Original Sims used 25 points across 5 traits. Good guideline.

Commands

| Command | Effect | |---------|--------| | LOOK AT [char] | Description, visible state | | TALK TO [char] | Conversation based on relationship | | HELLO [char] | Initiate social interaction | | GOODBYE [char] | End interaction, dismiss ephemeral | | EXAMINE [char] | Deeper observation |

External Homes

Characters can live in other repositories:

player:
  home: github:donhopkins/characters/don.yml
  location: pub/

Code Locations

Characters can be "at" a specific line in a file:

character:
  name: schema-expert
  home: characters/experts/schema-expert/
  location: "@central/apps/insights/pyleela/brain/Schema.py:142"
  # Currently examining line 142 of Schema.py

Location path syntax for code:

  • @repo/path/to/file.py — at a file
  • @repo/path/to/file.py:42 — at specific line
  • @repo/path/to/file.py:42-67 — examining line range
  • @repo/path/dir/ — in a directory (room)
> where is schema-expert?
schema-expert is at @central/apps/insights/pyleela/brain/Schema.py:142
examining the createSyntheticItemIfNeeded method

See room/ for directories as rooms and files as objects.

Party-Based Code Review

Form parties of expert characters to explore code together:

> summon drescher-expert, devops-expert, security-auditor
Party formed: [drescher-expert, devops-expert, security-auditor]

> party: review @central/tools/edgebox/scripts/ingest.py
drescher-expert: "The claim_task function is a schema pattern..."
devops-expert: "The PostgreSQL SKIP LOCKED is elegant..."
security-auditor: "I see proper parameter binding, good..."

> party: focus on lines 280-350
[Multi-perspective analysis of the code section]

Party Navigation:

> go to @central/apps/insights/pyleela/brain/
> enter Schema.py
> look at lines 140-180
> search for "synthetic"
> follow import ExtendedContext
> back
> party: gather here

Each party member brings their expertise. The LLM simulates all perspectives in a single call (see speed-of-light/).

Inner Voice (YAML Jazz)

Comments ARE the character's thoughts:

needs:
  hunger: 3
  # I could eat. But I'm comfortable here.
  # The kittens are asleep on my lap.

Motivation as Declared, Not Felt

Important distinction: When CHARACTER.yml specifies motivations, goals, or needs, these are declarative descriptions — they tell the LLM how to roleplay this character.

The LLM does not genuinely want to achieve these goals. It performs wanting them.

motivations:
  - protect_the_kittens     # Declared, not felt
  - find_good_food          # The LLM roleplays caring about this
  - explore_new_places      # No intrinsic drive — just character data

Why this matters:

  • No genuine agency — the character is a simulacrum
  • Roleplay all the way down (Shanahan)
  • Declared motivations are performed, not experienced
  • This is fine when acknowledged, problematic when mistaken for genuine will

See: representation-ethics/examples/aggregate-patterns.yml for the distinction between aggregate simulation (valid) and individual prediction (not valid).

K-line: MOTIVATION-ROLEPLAY

From the file to a first result

The download contains exactly the content displayed on this page. This copy may differ from the latest version in the source repository.

View the source and supporting files

This download contains SKILL.md only. Any scripts, references, templates and dependencies are not included. Get the required files from the source, preserving their directory structure, before continuing.

1. Download the file

Download SKILL.md

From the root of a test project, save the file as .skill-downloads/character-entities-mmbizjqk/SKILL.md, or use the command below. This folder is for inspecting the skill before installation.

Command for macOS/Linux or WSL: requires a POSIX shell and curl. On Windows without WSL, use the download button and create the folder manually.

mkdir -p '.skill-downloads/character-entities-mmbizjqk' && curl --fail --show-error --location 'https://skills-guides.com/api/skills/character-entities-mmbizjqk/download' --output '.skill-downloads/character-entities-mmbizjqk/SKILL.md.part' && mv '.skill-downloads/character-entities-mmbizjqk/SKILL.md.part' '.skill-downloads/character-entities-mmbizjqk/SKILL.md'

2. Check prerequisites

Read SKILL.md before using it. If it references scripts or external services, inspect them and prepare the required access in your test environment.

No recognized prerequisites section in this file. This does not mean it is self-contained: libraries, tools and access requirements may be mentioned elsewhere in the content or source repository.

The platforms on this page are catalog indications. The paths below follow tool documentation; they do not prove this skill has been run in those tools. No minimum tool version is confirmed for this listing.

3. Load the skill

After inspection, copy the complete folder into your project using one of the commands below, then open a new tool session. The command stops if a folder with the same name already exists: compare the files before replacing it.

Claude Code
test -f '.skill-downloads/character-entities-mmbizjqk/SKILL.md' && test -s '.skill-downloads/character-entities-mmbizjqk/SKILL.md' && mkdir -p '.claude/skills' && test ! -e '.claude/skills/character' && cp -R '.skill-downloads/character-entities-mmbizjqk' '.claude/skills/character'

Cursor
test -f '.skill-downloads/character-entities-mmbizjqk/SKILL.md' && test -s '.skill-downloads/character-entities-mmbizjqk/SKILL.md' && mkdir -p '.cursor/skills' && test ! -e '.cursor/skills/character' && cp -R '.skill-downloads/character-entities-mmbizjqk' '.cursor/skills/character'

Codex
test -f '.skill-downloads/character-entities-mmbizjqk/SKILL.md' && test -s '.skill-downloads/character-entities-mmbizjqk/SKILL.md' && mkdir -p '.agents/skills' && test ! -e '.agents/skills/character' && cp -R '.skill-downloads/character-entities-mmbizjqk' '.agents/skills/character'

OpenSkills

OpenSkills must already be installed. The local install/read procedure is checked with OpenSkills 1.5.0, which requires Node.js ≥ 20.6.0. Catalog slugs are not resolved automatically.

Official OpenSkills installation
openskills install './.skill-downloads/character-entities-mmbizjqk'

openskills read 'character-entities-mmbizjqk'

Reading should display the installed file content and its base directory. It does not run the skill or install its dependencies.

For an agent that reads AGENTS.md, then sync the index. This command changes AGENTS.md: review the diff before using it.

openskills sync

Manual method or another tool: attach SKILL.md to a conversation, or open it in an agent that can read files. Include any required supporting resources. No universal folder is recognized by every tool.

4. Try a first task

Use a short, synthetic input: an API endpoint, a small document or an interface brief. In a new conversation, attach the file or give the agent its path, then adapt this request:

Read .skill-downloads/character-entities-mmbizjqk/SKILL.md and apply its instructions to this example: [describe a test input]. Identify any missing files, dependencies or access. Produce the result requested by the skill without inventing data or running unreviewed scripts.

Expected result: output matching the skill instructions, or a precise list of missing prerequisites. A read confirmation alone does not validate a first use. If an external resource is unavailable, that path remains untested.

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