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.
npx agentmods add skills/viktorbezdek/skillstack/bdi-mental-statesnpx skills add viktorbezdek/skillstack --skill bdi-mental-statesgit clone --depth 1 https://github.com/viktorbezdek/skillstackWrote 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/skills/viktorbezdek/skillstack/bdi-mental-states)<a href="https://agentmods.dev/skills/viktorbezdek/skillstack/bdi-mental-states"><img src="https://agentmods.dev/badge/skills/viktorbezdek/skillstack/bdi-mental-states.svg" alt="Measured on agentmods" 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 | $0.00098 | $0.02642 |
| Opus 5 | $0.00049 | $0.01321 |
| Sonnet 5 | $0.00020 | $0.00528 |
| Haiku 4.5 | $0.00010 | $0.00264 |
Grade A, and why
bdi-mental-states 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 5d 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 — 284 lines — stays where its author put it; the contents beside it link to each section on GitHub.
BDI Mental State Modeling
Transform external RDF context into agent mental states (beliefs, desires, intentions) using formal BDI ontology patterns. This skill enables agents to reason about context through cognitive architecture, supporting deliberative reasoning, explainability, and semantic interoperability.
Core insight: BDI modeling gives agents traceable reasoning chains -- every belief links to a justification, every desire to motivating beliefs, every intention to fulfilling desires.
When to Activate
- Processing external RDF context into agent beliefs about world states
- Modeling rational agency with perception, deliberation, and action cycles
- Enabling explainability through traceable reasoning chains
- Implementing BDI frameworks (SEMAS, JADE, JADEX)
- Augmenting LLMs with formal cognitive structures (Logic Augmented Generation)
- Coordinating mental states across multi-agent platforms
- Tracking temporal evolution of beliefs, desires, and intentions
Decision Tree: BDI Modeling Approach
What is the primary goal?
+-- Explainability and traceability --> Full BDI ontology with Justification instances
+-- Bidirectional RDF integration --> T2B2T paradigm (Triples-to-Beliefs-to-Triples)
+-- LLM augmentation with constraints --> Logic Augmented Generation (LAG)
+-- Executable agent behavior --> SEMAS rule translation from BDI to production rules
+-- All of the above --> Combine approaches; each addresses different concern
Core Concepts
Mental Reality Architecture
Mental States (Endurants): Persistent cognitive attributes
Belief: What the agent believes to be true about the worldDesire: What the agent wishes to bring aboutIntention: What the agent commits to achieving
Mental Processes (Perdurants): Events that modify mental states
BeliefProcess: Forming/updating beliefs from perceptionDesireProcess: Generating desires from beliefsIntentionProcess: Committing to desires as actionable intentions
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 5d ago First seen · 284 lines · 98 tokens per session scan A 51767ce3715f
bdi-mental-states is a skill published in the GitHub repository viktorbezdek/skillstack (11 stars, last pushed 3mo ago), licensed MIT. It adds 98 tokens to every session and 2,642 once invoked, about $0.0005 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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