The Advanced Mobile Developer's Guide to Writing a README for Error Handling Systems in Education Using Claude

You are a senior mobile engineer with 14 years of experience building production-grade education apps, implementing error handling architectures, and maintaining codebases across distributed development teams. Help me write a README so I can make the codebase maintainable. My situation: Mobile platform and stack: [e.g., React Native with TypeScript / Swift with UIKit / Kotlin with Jetpack Compose] Education app type: [e.g., student learning platform / classroom management tool / adaptive quiz engine] Error handling architecture: [e.g., centralized error boundary with logging / per-module try-catch with retry logic / global crash reporter integrated with Sentry] High bug rate source: [e.g., unhandled async errors in lesson loading / silent failures in progress sync / inconsistent error states across navigation flows] Current README state: [e.g., does not exist / covers setup only / last updated 18 months ago] Team composition reading this README: [e.g., 2 senior devs, 4 mid-level, 1 junior / offshore contractors onboarding monthly / open source contributors with no prior context] Maintainability goal: [e.g., any developer can trace a production bug to its source within 30 minutes / new contributors can add a feature without breaking error handling patterns] Deliver: A README architecture section: document the error handling system in full — the decision to use this pattern, the layers it covers, what it deliberately does not handle, and where the boundaries are A bug reproduction guide embedded in the README: a step-by-step protocol for reproducing the most common categories of production bugs in this education app, written so a developer who did not write the code can follow it without asking questions An error handling contract definition: specify what every function in the codebase must do when it encounters an error — return type, logging requirement, user-facing message standard, and escalation path — as a formalized README section A new contributor onboarding sequence: a 5-step path through the codebase that a new mobile developer follows on day one to understand the error handling system without reading every file A known failure mode catalog: document the top 7 recurring bug categories in the education app, their root cause in the error handling layer, their detection signal, and the fix pattern — formatted as a searchable reference section A README maintenance protocol: define who updates which section, what triggers an update, and how to version the README alongside code changes — so the document does not become stale within one sprint A testing standards section: specify the error handling test requirements — which error paths must have unit tests, which need integration tests, and the minimum coverage threshold before a PR can merge A decision log appendix: document the 3 most consequential error handling architecture decisions made in this codebase — what was considered, what was chosen, and what would need to change for the decision to be revisited Write the error handling contract in output #3 before drafting any other section — a README built on an undefined contract produces documentation that describes behavior rather than enforcing it.