Content Quality: Briefing of 423 words (range 300-800). Clear Overview / What We Know / What We Don't Know / Context structure. The article consistently separates what Siemens stated (transition page: 'new chapter', Simcenter Radioss, the 'Shared Source' R&D program, OpenRadioss website being retired and redirected) from what heise online observed or inferred (GitHub organization showing no public repositories, license consequences, fork prospects). No legal conclusion is drawn by the article; the AGPL-continuity statement is explicitly attributed to heise.
Source Verification: Read all three snapshots from disk via gunzip (manifest: all status 200, no archive fallback, suspicious_patterns null for all three, so no injection-pattern findings to evaluate). source-0 (heise.de, Moritz Forster, 'Open Source with an expiration date? Siemens changes course on Radioss'): confirms 'Siemens is ending the OpenRadioss open-source project. The source code is no longer publicly accessible'; 'the GitHub organization of the previous open-source project no longer shows public repositories'; 'Siemens does not explain whether the source code will be made publicly accessible again elsewhere' (verbatim basis for the 'whether the code returns' absence); 'Altair released the source code as open source in 2022'; 'Siemens had acquired the former OpenRadioss parent Altair in March 2025' (Siemens-Altair March 2025 acquisition confirmed by heise, an allowlisted outlet, and consistent with the editor's background knowledge); partners get source access and a private HPC environment 'only within the scope of approved joint projects, not as a public open-source project'; 'The disappearance of the repository naturally does not retroactively invalidate already published versions. OpenRadioss was released under the GNU AGPL; anyone who possesses a corresponding copy can continue to use and distribute it under the terms of this license' (basis for 'published AGPL versions remain usable', correctly attributed to heise); fork sentence matches ('requires not only the code but also developers, tests, and maintenance across future versions'). source-1 (siemens.com transition page): the quote 'After four years of successful community-driven research, Siemens is entering a new chapter for the Radioss solver.' is verbatim; the 'Simcenter Radioss R&D Program (SCRDP) — a managed "Shared Source" environment for academic and industrial partners' wording, the access to source code and a private high-performance computing environment, 'The OpenRadioss website is being retired and visitors are being redirected to this transition page', and the Simcenter Radioss description (crashworthiness, impact, occupant safety, drop test and other highly nonlinear simulation applications) all match. Note: Siemens' own page says OpenRadioss 'is transitioning to a new phase' and does not itself say it is 'ending' the project, nor does it mention the GitHub organization or the repositories; those characterizations come from heise, and the article body attributes them to heise. source-2 (resources.sw.siemens.com Users' Day page): title 'OpenRadioss Users' Day: Coventry, UK | September 2, 2026'; quote 'continues to expand globally, uniting experts from academia, research institutions, and industry' is verbatim (the snapshot text continues 'in a shared mission: to advance open-source simulation...'). Supplementary live check (not part of the provenance chain): github.com/OpenRadioss currently renders 'This organization has no public repositories.', consistent with heise's observation; the article relies on heise for that claim, not on this check.
Factual Accuracy: Every specific (2022 release, March 2025 Altair acquisition, Shared Source R&D program, website retirement, September 2, 2026 Users' Day, AGPL) traces to a cited snapshot. Quotes verified verbatim. 'Siemens does not explain whether the code returns' is a faithful report of heise's own statement, and the article attributes it to heise rather than asserting it as its own finding. The fork 'not confirmed in the sources reviewed' line is an honest absence. Minor wording note: the headline and summary compress heise's characterization ('ending', 'no longer shows public repositories') into unattributed present-tense text, while Siemens' own words are the softer 'transitioning'/'new chapter'; the body, which carries the attribution, is accurate and clear, so this does not warrant a correction. The Context paragraph's 'shortly after' links the Sept 2 event page to the change by timing only and draws no conclusion beyond that.
Overall Assessment: Accurate, well-sourced and carefully attributed briefing. Allowlist warning resolved by vetting and adding the two first-party hosts. Approved for publication without corrections.