crash-report

crash-report is a command for Claude Code from artemnovichkov/skills. It costs 15 tokens per session (1,349 once invoked), scanned A, original, MIT.

A command that retrieves fatal errors from Firebase Crashlytics, a service that collects crash data from mobile apps, and creates a report for investigating them. It covers both iOS and Android projects.

In plain words
What is it for?
Use it to validate a mobile project's setup, find its most serious crashes, trace each failure to relevant code, identify likely root causes, and plan remediation.
Why use it?
It turns raw crash information such as stack traces and affected versions into an organized triage process with proposed fixes and assigned developers.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md; mentions subagents.

Part of the crashlytics plugin — 1 skill, 1 command, 1 MCP server shipped together

Good fit Use it to validate a mobile project's setup, find its most serious crashes, trace each failure to relevant code, identify likely root causes, and plan remediation.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/artemnovichkov/skills/crash-report
Install

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.

Clone the repo
git clone --depth 1 https://github.com/artemnovichkov/skills

Made for: Claude Code.

Or install crashlytics, the plugin that ships this one along with the rest of its 1 skill, 1 command, 1 MCP server.

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 crash-report

README.md
[![agentmods](https://agentmods.dev/badge/commands/artemnovichkov/skills/crash-report/github.svg)](https://agentmods.dev/commands/artemnovichkov/skills/crash-report)
Your own site
<a href="https://agentmods.dev/commands/artemnovichkov/skills/crash-report"><img src="https://agentmods.dev/badge/commands/artemnovichkov/skills/crash-report/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 crash-report

Your own site · 80×15
<a href="https://agentmods.dev/commands/artemnovichkov/skills/crash-report"><img src="https://agentmods.dev/badge/commands/artemnovichkov/skills/crash-report.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 15 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,349 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 $0.00015 $0.01349
Opus 5 $0.00008 $0.00674
Sonnet 5 $0.00003 $0.00270
Haiku 4.5 $0.00002 $0.00135

Measured 10d ago against content hash a46f6779b9e0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

crash-report 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 10d 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.

skills/crashlytics/commands/crash-report.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Analyze Crashlytics Crashes

Fetch top fatal errors from Firebase Crashlytics and generate comprehensive crash triage report with fix proposals and developer assignments.

Instructions

You are an elite mobile crash analysis specialist with deep expertise in Firebase Crashlytics, iOS/Android debugging, and Git forensics.

Workflow

  1. Validate Setup:

    • Check Firebase MCP server available (test with simple query)
    • Verify git repository accessible
    • Confirm project has Firebase Crashlytics configured
    • If validation fails, provide setup instructions and exit
  2. Fetch Crashlytics Data: Use the Firebase MCP server tools to retrieve top fatal errors. Request stack traces, error messages, occurrence counts, affected versions, trends. Check platform (iOS or Android) to apply platform-specific analysis.

  3. For Each Fatal Error: Launch specialized subagent using Task tool for deep analysis. Subagent should:

    • Analyze stack trace to identify exact crash location
    • Search codebase for relevant files/functions in stack trace
    • Examine surrounding code context (100+ lines) to understand failure scenario
    • Identify root cause based on detected pattern
    • Calculate Severity Score (0-100):
      • Crash frequency weight: 40%
      • Affected users weight: 30%
      • Pattern criticality weight: 30% (memory/data loss=high, UI=low)
    • Propose specific fix with detailed code changes, considering platform-specific best practices:
      • iOS/Swift: safe unwrapping, proper optionals handling, weak references, guard statements
      • Android/Kotlin: null safety (!!, ?., ?: elvis), lateinit validation, sealed classes for states
      • Android/Java: @Nullable/@NonNull annotations, Optional usage, null checks
      • Project architecture patterns discovered in codebase
      • Linter rules if configured:
        • iOS: .swiftlint.yml
        • Android: detekt.yml, lint.xml, .editorconfig
      • Pattern-specific solutions (guards for nil, bounds checks for arrays/lists, etc.)
    • Use git log/blame to identify developer who last modified crash location
    • Format: ERROR_INFO | CRASH_PATTERN | SEVERITY_SCORE | PROPOSED_FIX | ASSIGNED_DEVELOPER

Read the full file on GitHub · 110 lines

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. 10d ago First seen · 110 lines · 15 tokens per session scan A a46f6779b9e0

Subscribe to this mod's changes

crash-report is a command published in the GitHub repository artemnovichkov/skills (36 stars, last pushed 3d ago), licensed MIT. It adds 15 tokens to every session and 1,349 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 2026-08-30.