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 emaraschio/cursor-commands --skill add-error-handlinggit clone --depth 1 https://github.com/emaraschio/cursor-commandsWrote 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/emaraschio/cursor-commands/add-error-handling)<a href="https://agentmods.dev/skills/emaraschio/cursor-commands/add-error-handling"><img src="https://agentmods.dev/badge/skills/emaraschio/cursor-commands/add-error-handling.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 | $0.00013 | $0.00416 |
| Opus 5 | $0.00006 | $0.00208 |
| Sonnet 5 | $0.00003 | $0.00083 |
| Haiku 4.5 | $0.00001 | $0.00042 |
Grade A, and why
add-error-handling 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 8d 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.
What it actually says
Overview
Implement comprehensive error handling for the current code to make it robust and resilient to failures while maintaining good user experience.
Steps
- Error Detection
- Identify potential failure points and edge cases
- Find unhandled exceptions and error conditions
- Detect missing validation and boundary checks
- Analyze async operations and network calls
- Error Handling Strategy
- Implement try-catch blocks where appropriate
- Add input validation and sanitization
- Create meaningful error messages and logging
- Design graceful degradation for non-critical failures
- Recovery Mechanisms
- Implement retry logic for transient failures
- Add fallback options for service unavailability
- Create circuit breakers for external dependencies
- Design proper error propagation and handling
- User Experience
- Provide clear error messages to users
- Implement proper error status codes for APIs
- Add loading states and error boundaries for UI
- Include helpful suggestions for error resolution
Add Error Handling Checklist
- Identified all potential failure points and edge cases
- Implemented try-catch blocks where appropriate
- Added input validation and sanitization
- Created meaningful error messages and logging
- Implemented retry logic for transient failures
- Added fallback options and circuit breakers
- Provided clear error messages to users
- Implemented proper error status codes for APIs
- Added loading states and error boundaries for UI
Guardrails
- Never swallow errors silently; handle them meaningfully, or log and rethrow.
- Handle errors at meaningful boundaries instead of wrapping every call in try/catch.
- Do not commit, push, merge, or run destructive commands without explicit user consent.
- Never include secrets or credentials in error messages or logs; flag any exposure instead of printing or committing it.
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.
- 8d ago First seen · 50 lines · 13 tokens per session scan A 188706d8f1d2
add-error-handling is a skill published in the GitHub repository emaraschio/cursor-commands (9 stars, last pushed 1mo ago), licensed MIT. It adds 13 tokens to every session and 416 once invoked, about $0.0001 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 2026-08-31.
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Root-cause analysis with hypothesis tracking. Trigger: 'debug', 'broken', 'not working', 'fix this bug', /debug.