The Arm-Qualcomm verdict made headlines for its $2 award. The finding that matters more is about who controls the compliance tests a custom chip must pass before it can ship. The verdict nobody read closely On Oct. 13, a federal jury in Delaware delivered the second verdict in two years between Arm and Qualcomm. The number that drew the most attention was the damages award: $2, one for each claim Qualcomm won. Both companies declared victory, and IMHO both had some reason to. Arm prevailed on four of the six claims . On the other hand, Qualcomm won a finding that Arm interfered with its business with Meta, plus an additional finding under its Architecture License Agreement that I think deserves far more attention than it received. The jury found that Arm breached Qualcomm’s Architecture License Agreement by withholding two deliverables, ACKs and OOBs. To most people, these acronyms mean very little, which may explain why most coverage moved quickly on to royalties and to the $2. But they describe something we may know very well: the tests a custom processor must pass before anyone can call it an Arm processor. What a compliance kit actually does Arm licenses its technology in two ways. Most customers take Arm-designed cores “as is” and integrate them into their chips, under a Technology License Agreement (TLA). A smaller group, including Apple, Qualcomm, and Nvidia, signed up for an Architecture License Agreement (ALA) that lets them design their own cores executing the Arm instruction set. That freedom comes with an obligation. A custom core has to behave exactly as the architecture specifies, down to obscure corner cases, or software written for Arm will eventually break on it. A licensee demonstrates this with the Architecture Compliance Kit, or ACK. Qualcomm’s filing says its engineers run roughly 48,000 ACK tests. According to Tirias Research , an industry analyst firm that reported daily from the courtroom and drew on Qualcomm’s pre-trial statement of proof, out-of-band (OOB) packages tell engineers which of those tests apply to a specific processor design, and ACK patches fix problems in the tests themselves. Qualcomm alleged that Arm withheld these materials from late 2022 into 2025. Anyone who has run a large verification team will recognize why this matters. When a test fails, the first question is whether the bug lives in the design or in the test. With tens of thousands of tests, a custom microarchitecture and a development effort measured in many person-years, a test bug without a patch can cost weeks of engineering time chasing a problem that does not exist in the silicon. Multiply that across a program, and the delay becomes strategic, especially since, as Tirias observed , licensing decisions made today shape products that reach customers several years later. On the other hand, Arm argued that the underlying ACK remained available, that quarterly releases continued, and that the additional OOBs, patches, and engineering support were not mandatory deliverables under the contract. The jury disagreed on the contract question, but the underlying point is a fair one to debate. Tirias framed it well, asking when withholding support effectively becomes withholding part of the product. The clause worth billions The $2 award made the verdict look surprisingly small. However, Section 8.3 of Qualcomm’s architecture license, as Tirias describes it , provides that if Arm breaches certain obligations and fails to cure within 30 days of written notice, royalty rates on qualifying products can fall to zero for five years. Qualcomm says it gave notice of these breaches in November 2022, repeated it in December, and received a denial from Arm. This means the largest potential remedy in the entire dispute, which Arm itself values in the billions of dollars, rests exactly on a breach about test deliverables. The remedy depends on neither the Meta interference finding, nor access to Arm’s v10 architecture, nor any pricing dispute.