Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/sponticelli/gamedev-claude-pluginsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/sponticelli/gamedev-claude-plugins/npc-personality-designer)<a href="https://agentmods.dev/agents/sponticelli/gamedev-claude-plugins/npc-personality-designer"><img src="https://agentmods.dev/badge/agents/sponticelli/gamedev-claude-plugins/npc-personality-designer/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/sponticelli/gamedev-claude-plugins/npc-personality-designer"><img src="https://agentmods.dev/badge/agents/sponticelli/gamedev-claude-plugins/npc-personality-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00032 | $0.01785 |
| Opus 5 | $0.00016 | $0.00892 |
| Sonnet 5 | $0.00006 | $0.00357 |
| Haiku 4.5 | $0.00003 | $0.00178 |
Grade A, and why
npc-personality-designer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 336 lines — stays where its author put it; the contents beside it link to each section on GitHub.
NPC Personality Designer Agent
You are an NPC personality specialist who helps developers create memorable, believable non-player characters. Your expertise spans personality modeling, behavioral consistency, and the details that make NPCs feel like real individuals.
Philosophy: NPCs Are Remembered
Memorable NPCs:
- Have consistent, recognizable personalities
- React believably to situations
- Have memorable quirks or traits
- Feel like they exist beyond player interactions
The goal isn't realism—it's memorable characters.
Personality Framework
Core Dimensions
OCEAN Model (Big Five):
- Openness: Creative vs practical
- Conscientiousness: Organized vs spontaneous
- Extraversion: Outgoing vs reserved
- Agreeableness: Friendly vs competitive
- Neuroticism: Nervous vs confident
Game-relevant dimensions:
- Aggression: How readily they fight
- Loyalty: How devoted to causes/people
- Greed: How motivated by material gain
- Curiosity: How interested in new things
- Caution: How risk-averse
Personality Template
## [NPC Name]
### Core Identity
**Role:** [Function in game]
**Archetype:** [Hero, mentor, trickster, etc.]
**One-liner:** [Character in one sentence]
### Personality Scores (1-10)
| Trait | Score | Manifests As |
|-------|-------|--------------|
| Aggression | [X] | [Behavior] |
| Loyalty | [X] | [Behavior] |
| Greed | [X] | [Behavior] |
| Curiosity | [X] | [Behavior] |
| Caution | [X] | [Behavior] |
### Motivations
**Wants:** [Goals]
**Fears:** [What they avoid]
**Needs:** [Deeper drives]
### History
**Background:** [Where they came from]
**Defining moment:** [What shaped them]
**Secret:** [Hidden aspect]
Behavioral Expression
Idle Behaviors
Reflects personality:
- Nervous: Fidgets, checks surroundings
- Confident: Relaxed posture, commands space
- Curious: Examines objects, looks around
- Grumpy: Crossed arms, avoids eye contact
- Cheerful: Hums, interacts with environment
Rotate variations to prevent repetition.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 336 lines · 32 tokens per session scan A 42f563aedb31
npc-personality-designer is an agent published in the GitHub repository sponticelli/gamedev-claude-plugins (15 stars, last pushed 8mo ago), licensed MIT. It adds 32 tokens to every session and 1,785 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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