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How to Control Mac Mini 5,2 CPU Fan Speed on Ubuntu 24.04

Users running Ubuntu 24.04 on a Mid 2011 Mac mini 5,2 can manage CPU fan speeds using the applesmc and mbpfan tools. The Linux applesmc driver exposes Intel Mac temperature sensors and fan controls through the sysfs interface, allowing manual or automated speed adjustments. mbpfan version 2.4.0 is available as a standard package in Ubuntu 24.04 and links fan speed to CPU temperature readings from coretemp. Users can configure temperature thresholds and fan speed limits in the mbpfan configuration file based on values reported by their specific hardware. Leaving the fan in manual mode at low RPM is flagged as a risk, since it prevents the fan from responding to increased CPU or GPU load.

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ProgrammingDEV Community ·

Why AI-Generated Tests Can't Verify Their Own Code Changes

Software engineers face a hidden flaw in AI-assisted development: when an AI agent writes both a code patch and its accompanying tests in the same session, the tests cannot serve as independent verification. Because both artifacts share the same context and assumptions, a passing test suite may simply confirm the agent's own interpretation rather than the original ticket's requirements. The author proposes a three-lane workflow to address this, involving spec-isolated properties, content-addressed fixtures, and a skip budget that agent-generated diffs cannot modify. A key safeguard is deriving test contracts directly from ticket text in a separate workspace, before the agent session begins, with oracle files locked from agent edits. The article presents this as a practical workflow pattern rather than a formally studied solution, offering reproducible code skeletons for teams to adapt.

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ProgrammingDEV Community ·

Open Source AI Gateway Bifrost Passes Real-World Access Control Test by Court Staffer

A California county court operations staffer tested Bifrost, an open source AI gateway from Maxim AI, to evaluate its role-based access control capabilities. The author built three distinct roles mirroring real courtroom staff — interpreter, reporter, and clerk — each scoped to different AI models and daily spending limits. All nine access attempts behaved as configured, with every expected refusal blocked at the gateway level before reaching the AI provider and logged with the associated role name. The test highlighted a key principle the author applies in actual court work: permissions should map to job functions, not titles, following the least-privilege model familiar from tools like AWS IAM. The author also drew a parallel to California court rules, which presume records are open but require any sealing orders to be narrowly tailored — mirroring how access control policies should be designed.

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ProgrammingDEV Community ·

How to Structure Person Schema for Pseudonymous Web3 Authors Using ENS Data

Developer Gabriel Mangabeira has published a technical guide on how pseudonymous Web3 authors can structure Person schema markup to help search engines and AI tools verify authorship when no legal name or traditional biography exists. The guide recommends using identifier fields with PropertyValue objects to represent ENS names and Ethereum wallet addresses, rather than treating wallet data as the core identity itself. It also advises using sameAs to link to resolved identity profiles such as web3.bio, and reserving hasCredential strictly for independently verifiable credentials. The piece is aimed at crypto and DeFi publishers, whose content often falls under Google's YMYL category, making author trust signals especially important for search quality evaluation. Mangabeira cautions that this approach should be framed as identity verification rather than an SEO ranking tactic, as no confirmed evidence links structured wallet data to improved rankings.

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