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 blockmatic/basilic --skill add-error-handlinggit clone --depth 1 https://github.com/blockmatic/basilicWrote 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/blockmatic/basilic/add-error-handling)<a href="https://agentmods.dev/skills/blockmatic/basilic/add-error-handling"><img src="https://agentmods.dev/badge/skills/blockmatic/basilic/add-error-handling.svg" alt="Measured on agentmods" 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 | $0.00034 | $0.00265 |
| Opus 5 | $0.00017 | $0.00133 |
| Sonnet 5 | $0.00007 | $0.00053 |
| Haiku 4.5 | $0.00003 | $0.00026 |
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 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.
What it actually says
Purpose
Implement comprehensive error handling for current code to make it robust and resilient while maintaining good UX.
Steps
- Error Detection: Identify potential failure points, edge cases, unhandled exceptions, missing validation, async/network call issues
- Error Handling Strategy: Implement try-catch blocks, add input validation/sanitization, create meaningful error messages/logging, design graceful degradation
- Recovery Mechanisms: Retry only when the write is replay-safe (idempotency key or equivalent deduplication). Otherwise keep an explicit no-retry path. Permitted retries need a bounded deadline, cancellation, and backoff. Add fallbacks and circuit breakers only where they do not hide the owning failure
- User Experience: Provide clear error messages, implement proper error status codes for APIs, add loading states/error boundaries for UI, include helpful suggestions
Follow the error-handling page listed from the technical docs path in AGENTS.md.
Completion
Read completion evidence before reporting completion.
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 Changed · +7 lines a90c90cb80ca
- 4d ago First seen · 16 lines · 34 tokens per session scan A 76897524c720
add-error-handling is a skill published in the GitHub repository blockmatic/basilic (89 stars, last pushed yesterday), licensed MIT. It adds 34 tokens to every session and 265 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 2026-09-03.
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