Provenance Record

Well-structured 798-word News piece covering two converging software developments (SteamOS Manager commit, Proton 11 ARM64 betas) as signals of Steam Frame launch readiness. Clear section breakdown, appropriate technical depth for the audience, no AI self-reference, neutral tone throughout.

All five sources verified via local snapshots (source-0.html.gz through source-4.html.gz, all status 200). Source-0 (GamingOnLinux, May 15): confirms 'Initial support for Steam Frame' commit, 'More to come.' engineer note, 'Valve, like a lot of companies, will have a lot of private code going on. So this is just some of that work going public.' and 'It's all starting to come together now.' — all quoted verbatim and correctly attributed. Source-1 (GamingOnLinux, Apr 17): confirms ARM64 Proton build with FEX quote verbatim and FEX-2604 changelog entry. Source-2 (GamingOnLinux, May 13): confirms FEX-2605 as 'part of the special sauce' verbatim and 'Hopefully the release announcement for the Frame isn't far off now!' verbatim. Source-3 (Engadget, Nov 2025): confirms all hardware specs — Snapdragon 8 Gen 3, 16GB RAM, up to 1TB, 2160x2160 per eye at 144Hz, 110-degree FOV, 440 grams, 21.6Wh battery, 45W charging, four monochrome cameras, inside-out tracking, magnetic thumbsticks, capacitive finger tracking, 40-hour AA battery life, '10x improvement in image quality and effective bandwidth' for Foveated Streaming — all verified verbatim. Source-4 (Engadget, Feb 2026): confirms supply chain narrative, 'industry-wide memory and storage shortages', AI sector consuming memory chips, 'We will keep you updated as much as we can as we finalize those plans as soon as possible' quote verbatim, and 'early 2026' target revised to 'first half of 2026'. ISSUE: The 'What We Don't Know' section states 'The company previously indicated the headset would cost less than the Valve Index full kit, which sold for $999.' Neither the Valve Index $999 pricing nor Valve's stated pricing target relative to the Index appears in any of the five cited sources. This is an unsourced specific claim in a subordinate body section.

All claims in the headline, summary, lead, and primary reporting sections are accurately supported by cited sources. The single exception is the unsourced Valve Index pricing comparison in the final 'What We Don't Know' section, which does not appear in any of the five sources. The Steam Controller 'reached retail on May 4' claim is consistent with the existing May 16 SDL3 article in the archive ('ten days after the hardware itself went on sale') but is not documented in a cited source here.

Strong submission with thorough sourcing and accurate verbatim quotes. The article is approved with a single corrections note for the unsourced Valve Index pricing comparison in the body.