Keywords: Large Language Models, Course Grounded Tutoring, Retrieval Augmented Generation, Best Matching 25, Versioned Source Corpus, Bounded Hints, Claim Verification, Human Escalation, Offline Component Testing, Learning Transfer, Educational Data Privacy.

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Source of Funding:

No specific external funding source is reported in the source manuscript.

Competing Interests Statement:

There are no conflicts of interest by the authors in any way.

Consent for publication:

The authors give consent for the publication.

Authors' contributions:

All the authors contributed equally to the article.

Informed Consent:

Not Applicable. The reported offline checks used constructed records and no human participants.

Availability of Data and Material:

Constructed test inputs and deterministic procedures are described in the manuscript.

Institutional Review Board Statement:

Not Applicable. No human participants or identifiable student records were included in the offline checks.

Ethical Approval:

Not Applicable to the constructed offline unit tests.