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spekka: Skill for Claude Code

.claude/skills/spekka-global-error-handling/SKILL.md

Global Error Handling is a skill for Claude Code from johnreitano/spekka. It costs 27 tokens per session (223 once invoked), scanned A, original, MIT.

A set of guidelines for detecting, reporting, and recovering from errors in software. It covers validation, clear user messages, specific error types, retries, and cleanup of resources such as connections or files.

In plain words
What is it for?
Use it when designing error handling in controllers, APIs, external service calls, or other system boundaries. It helps decide how to validate input, report failures, retry safely, and degrade when non-critical services stop working.
Why use it?
It prevents failures from producing confusing messages, invalid application states, or leaked resources. It also gives temporary service failures a defined retry or fallback approach.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: mentions Claude Code.

This is johnreitano/spekka's own configuration. It tells Claude Code how to work on spekka itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything spekka configures →

not rated 5repo 9mo ago A scan 27 tokens original MIT
View source ↗ johnreitano/spekka
Reuse

Borrowing it

Nothing to install: this file belongs to johnreitano/spekka. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/johnreitano/spekka/main/.claude/skills/spekka-global-error-handling/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/johnreitano/spekka

Made for: Claude Code.

Wrote 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.

agentmods badge for Global Error Handling

README.md
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Your own site
<a href="https://agentmods.dev/skills/johnreitano/spekka/spekka-global-error-handling"><img src="https://agentmods.dev/badge/skills/johnreitano/spekka/spekka-global-error-handling/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.

agentmods 80×15 button for Global Error Handling

Your own site · 80×15
<a href="https://agentmods.dev/skills/johnreitano/spekka/spekka-global-error-handling"><img src="https://agentmods.dev/badge/skills/johnreitano/spekka/spekka-global-error-handling.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 223 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00027 $0.00223
Opus 5.5 $0.00011 $0.00089
Sonnet 5.5 $0.00005 $0.00045
Haiku 4.5 $0.00003 $0.00022

Measured 2mo ago against content hash 40001db5eea5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Global 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 2mo 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.

.claude/skills/spekka-global-error-handling/SKILL.md · 19 lines

What it actually says

Global Error Handling

This Skill provides Claude Code with specific guidance on how it should handle global error handling.

Instructions

  • User-Friendly Messages: Provide clear, actionable error messages to users without exposing technical details or security information
  • Fail Fast and Explicitly: Validate input and check preconditions early; fail with clear error messages rather than allowing invalid state
  • Specific Exception Types: Use specific exception/error types rather than generic ones to enable targeted handling
  • Centralized Error Handling: Handle errors at appropriate boundaries (controllers, API layers) rather than scattering try-catch blocks everywhere
  • Graceful Degradation: Design systems to degrade gracefully when non-critical services fail rather than breaking entirely
  • Retry Strategies: Implement exponential backoff for transient failures in external service calls
  • Clean Up Resources: Always clean up resources (file handles, connections) in finally blocks or equivalent mechanisms
Changes

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.

  1. 2mo ago First seen · 19 lines · 27 tokens per session scan A 40001db5eea5

Subscribe to this mod's changes

Global Error Handling is a skill published in the GitHub repository johnreitano/spekka (5 stars, last pushed 9mo ago), licensed MIT. It adds 27 tokens to every session and 223 once invoked, about $0.0001 per session on Opus 5.5. 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.

Debugging
Related

Global Error Handling compared with skills from other repositories

Global Error Handling next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
Global Error Handlingjohnreitano/spekkaSkill59mo agoMITA27Claude Code
systematic-debuggingopen-metadata/OpenMetadataSkill16kyesterdayApache-2.0A37Claude Code
log-error-digestzebbern/claude-code-guideSkill4.7k3d agoMITA71Claude Code, Codex
cwv-optimizeradobe/skillsSkill319yesterdayApache-2.0A112Claude Code
ci-fixersipyourdrink-ltd/bernsteinSkill1.2kyesterdayApache-2.0A15Claude Code, Codex
incident-response-incident-responsermyndharis/antigravity-skillsSkill1.9k23d agoMITA36Claude Code
triaging-web-analytics-supportPostHog/posthogSkill41kyesterdaynoneA151Claude Code, Codex