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/arabelatso/skills-4-se/runtime-error-explainernpx skills add ArabelaTso/Skills-4-SE --skill runtime-error-explainergit 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/runtime-error-explainer)<a href="https://agentmods.dev/skills/arabelatso/skills-4-se/runtime-error-explainer"><img src="https://agentmods.dev/badge/skills/arabelatso/skills-4-se/runtime-error-explainer.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 5.1 | $0.00098 | $0.04476 |
| Opus 5 | $0.00049 | $0.02238 |
| Sonnet 5 | $0.00020 | $0.00895 |
| Haiku 4.5 | $0.00010 | $0.00448 |
Grade A, and why
runtime-error-explainer 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 2d 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 — 850 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Runtime Error Explainer
Analyze runtime and compilation errors with clear explanations and actionable fixes.
Core Capabilities
This skill helps debug runtime and compilation errors by:
- Parsing error output - Extract key information from error messages and stack traces
- Identifying root causes - Determine why errors occur during execution or compilation
- Explaining clearly - Translate technical errors into understandable language
- Providing fixes - Suggest concrete code changes with before/after examples
- Preventing recurrence - Recommend best practices to avoid similar errors
Error Analysis Workflow
Step 1: Gather Error Context
Collect all relevant information about the error.
Essential Information:
- Complete error message and stack trace
- Programming language and version
- Code that triggered the error
- How the error was triggered (command, action, input)
Additional Context (if available):
- Recent code changes
- Environment details (OS, IDE, dependencies)
- Input data or parameters that caused error
- Configuration files
How to Gather:
# Python - Run with full traceback
python script.py
# Python - More verbose error output
python -v script.py
# Java - Compile with verbose output
javac -verbose MyClass.java
# Java - Run with stack trace
java -XX:+ShowCodeDetailsInExceptionMessages MyClass
Step 2: Categorize the Error
Identify the error type using references/error_catalog.md:
Error Categories:
-
Syntax/Compilation Errors
- Python: SyntaxError, IndentationError
- Java: Compilation errors (missing semicolons, type errors)
-
Runtime Errors
- Python: TypeError, AttributeError, ValueError, KeyError, IndexError
- Java: NullPointerException, IllegalArgumentException, ArrayIndexOutOfBoundsException
-
Import/Dependency Errors
- Python: ImportError, ModuleNotFoundError
- Java: ClassNotFoundException, NoClassDefFoundError
-
Type Errors
- Python: TypeError (wrong types in operations)
- Java: Type mismatch compilation errors
What ships with it
2 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.
- 2d ago First seen · 850 lines · 98 tokens per session scan A 0747239ab130
runtime-error-explainer is a skill published in the GitHub repository ArabelaTso/Skills-4-SE (248 stars, last pushed 15d ago), licensed Apache-2.0. It adds 98 tokens to every session and 4,476 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 2026-09-03.
Other skills, from other repositories
analysis-to-delivery
通用需求分析到开发设计工作流 — thin Skill router,加载规则与路径按声明。Use when starting any new feature requiring structured analysis-to-delivery workflow.
exploratory-data-analysis
Perform bounded, local exploratory analysis of explicitly supported scientific files. Use for redacted CSV/TSV/JSON profiles; optional NumPy, HDF5, FASTA/FASTQ, and basic image metadata inspection; missingness/leakage audits; outlier and transformation sensitivity; and rigorous EDA report scaffolds. Other domain…
google-ads-audit
Google Ads account audit and business context setup. Run this first — it gathers business information, analyzes account health, and saves context that all other ads skills reuse. Trigger on "audit my ads", "ads audit", "set up my ads", "onboard", "account overview", "how's my account", "ads health check", "what should…
webhook-management
Configure and validate CCAM webhook targets across supported chat, incident, automation, and generic providers. Use when listing provider requirements, creating or updating a target, scoping it to alert rules, sending a test notification, reviewing delivery history, or deleting a target.
gesellschaftsrechtliche-satzungen-agb
Für Gesellschaftsrechtliche Satzungen AGB Abgrenzung: ordnet Norm, Beweislast und Gegenargument; Ergebnis: Prüfprodukt mit Risiko und nächstem Schritt. Fachgebiet: AGB-Recht-Prüfer. Route: gesellschaftsrechtliche-satzungen-agb.
master-yinguang
Use when user asks about 印光大师, 净土, 念佛, 持名念佛, 十念法, 摄耳谛听, 老实念佛, 信愿行, 带业往生, 仗佛慈力, 自力他力, 竖出横超, 往生, 极乐, 阿弥陀佛, 净土三经, 敦伦尽分, 闲邪存诚, 因果报应, 文钞, 一函遍复, or wants teaching in 印光大师 Yinguang's voice. Triggers include "印光"、"文钞"、"老实念佛"、"信愿行"、"带业往生"、"仗佛慈力"、"横超竖出"、"都摄六根"、"净念相继"、"敦伦尽分"、"闲邪存诚"、"因果"、"十念法"、"摄耳谛听"、"一函遍复"、"净土三经"、"往生" — invoke…