Why Git Says 'Repository Not Found' When the Repo Actually Exists

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Developers using multiple GitHub accounts on one machine may encounter a misleading 'Repository not found' error during git pull, even when the repository is accessible in a browser. GitHub deliberately returns a 404 instead of a 403 for unauthorized requests to private repos, to avoid leaking information about their existence. The root cause is typically a credential helper caching a token for the wrong account, causing git to silently authenticate with an identity that lacks access. On machines running the GitHub CLI, the fix is straightforward: use gh auth switch to activate the correct account, then run gh auth setup-git to update git's credential helper. Users without the GitHub CLI can resolve the issue by removing the stale credential from their operating system's credential store and re-authenticating on the next pull.

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AI Task Model Switching Needs Concurrency Contracts to Prevent Race Conditions

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ProgrammingDEV Community ·

How to Evaluate LLM Outputs in Production Using Rubrics and Guardrails

Developers building production AI systems cannot rely on HTTP status codes alone to confirm output quality, as a successful server response may still contain hallucinated or harmful content. The Air Canada chatbot case illustrates this risk: the system returned valid responses while fabricating a bereavement discount policy, ultimately resulting in a tribunal ruling against the airline. A practical evaluation framework combines system prompts that define quality criteria, scored rubrics assessed by a second LLM acting as a judge, and runtime guardrails that block or flag unsafe outputs. This LLM-as-a-judge approach scores responses on dimensions such as factual accuracy, relevance, and harmlessness, scaling more efficiently than manual human review. Running evaluations asynchronously, logging all decisions, and updating rubrics via prompt changes allows teams to maintain continuous output quality monitoring in live environments.

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ProgrammingDEV Community ·

Why AI Agent Decision Logs Should Record Rejected Options, Not Just Actions

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ProgrammingDEV Community ·

Framework Proposes Rigorous Method to Compare Cloud vs On-Device AI Costs

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