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 skills add ArabelaTso/Skills-4-SE --skill program-to-tlaplus-spec-generatorgit clone --depth 1 https://github.com/ArabelaTso/Skills-4-SEWrote 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/arabelatso/skills-4-se/program-to-tlaplus-spec-generator)<a href="https://agentmods.dev/skills/arabelatso/skills-4-se/program-to-tlaplus-spec-generator"><img src="https://agentmods.dev/badge/skills/arabelatso/skills-4-se/program-to-tlaplus-spec-generator/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/skills/arabelatso/skills-4-se/program-to-tlaplus-spec-generator"><img src="https://agentmods.dev/badge/skills/arabelatso/skills-4-se/program-to-tlaplus-spec-generator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00089 | $0.01870 |
| Opus 5 | $0.00044 | $0.00935 |
| Sonnet 5 | $0.00018 | $0.00374 |
| Haiku 4.5 | $0.00009 | $0.00187 |
Grade A, and why
program-to-tlaplus-spec-generator 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 9d 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 — 350 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Program to TLA+ Spec Generator
Overview
This skill enables automatic generation of TLA+ specifications from source code. It analyzes program structure, identifies state variables and transitions, and produces well-formed TLA+ modules with proper syntax and semantics.
Generation Workflow
Follow this sequential process to generate TLA+ specifications from code:
1. Analyze Input Program
Read and understand the source code:
- Identify scope: Determine which components/modules to formalize
- Understand purpose: What does the system do? What properties matter?
- Detect patterns: Is it concurrent? Distributed? Sequential? State machine?
- Note language: Adapt analysis to language-specific constructs
Ask clarifying questions if needed:
- Which components should be included in the spec?
- Are there specific properties or invariants to capture?
- What level of abstraction is desired?
2. Extract State Variables
Identify variables that represent system state:
Look for:
- Global variables and shared state
- Object fields that persist across operations
- Database/storage state
- Message queues or buffers
- Locks, semaphores, and synchronization primitives
- Process/thread state (running, waiting, etc.)
Determine types:
- Booleans, integers, sets, sequences, records
- Map program types to TLA+ types
- Identify bounded vs unbounded values
Output: List of state variables with TLA+ type declarations
3. Identify System Actions
Extract operations that modify state:
Look for:
- Functions/methods that change state
- Event handlers and callbacks
- Message send/receive operations
- Lock acquire/release
- State transitions in state machines
- Concurrent operations
For each action, identify:
- Preconditions (when can it execute?)
- State changes (what variables are modified?)
- Postconditions (what must be true after?)
- Parameters and return values
Output: List of actions with their effects
4. Determine Initial State
What ships with it
3 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.
- 9d ago First seen · 350 lines · 89 tokens per session scan A 90ef8c734c8d
program-to-tlaplus-spec-generator is a skill published in the GitHub repository ArabelaTso/Skills-4-SE (252 stars, last pushed 22d ago), licensed Apache-2.0. It adds 89 tokens to every session and 1,870 once invoked, about $0.0004 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 2026-09-03.
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