Developer Builds Circuit Breaker After Claude Code Quota Silently Killed 15 Automated Jobs

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A developer running 15 Claude Code-powered LaunchAgent jobs on macOS discovered that hitting the platform's weekly usage limit caused all jobs to fail silently for six hours without any alerts. When the quota is reached, Claude Code returns an error to stderr, but macOS launchd simply logs an exit code and retries on the next cycle, creating a silent failure loop that can persist for days. The developer only found out the following morning through a manual check, by which time automated tasks like social post generation, thumbnail processing, and knowledge base ingestion had all been skipped. To fix this, they built a Python-based circuit breaker script that intercepts Claude invocations, scans output for quota-related error patterns, and immediately blocks further calls while sending a Discord alert and persisting the tripped state to a JSON file. The approach mirrors an electrical circuit breaker: once tripped, all downstream jobs halt visibly until the developer manually resets the state after the quota window resets.

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