Provenance Record

Well-structured News piece (584 words, within the 400-1200 News range) using the Overview / What We Know / Why It Matters / What We Don't Know format. Technical depth is appropriate: it correctly distinguishes NAND flash from HBM, names the specific fabs (M17, P&T7), and separates the 80T won fab spend from the 20T won packaging spend without conflating them.

All 3 source snapshots read from disk and integrity-verified (uncompressed sha256 of each .html.gz matches the manifest exactly). source-0.html.gz (Reuters wire via wtvbam.com, byline Hyunjoo Jin, 'SEOUL, July 2 (Reuters)') CONFIRMED: '100 trillion won ($64.38 billion)', '80 trillion won...NAND...by 2029', '20 trillion won...packaging plant by late 2027', fab 'known as M17', the verbatim Kwak quote 'While demand for NAND has been increasing and is expected to continue growing in the future, NAND supply is constrained', 'double the country's memory chip production capacity within five years', the Lee Jae Myung political framing, and the 'plans could change depending on global chip demand' caveat. source-1.html.gz (TrendForce, on-allowlist) CONFIRMED: 'National Briefing on the Vision for Advanced Industry Development in the Chungcheong Region', the KRW 80T M17 / KRW 20T P&T7 split, 'first half of 2029' operations, the verbatim 'agentic AI and physical AI is broadening NAND flash applications, making further capacity expansion necessary', and Samsung's '56 trillion...HBM...Onyang and Cheonan'. source-2.html.gz (The Korea Times, byline Yonhap) CONFIRMED: 'An industrywide 392 trillion-won ($252.5 bil.) investment...Chungcheong', 'follow-up plan to the government's tripolar mega projects, unveiled by President Lee Jae Myung earlier this week', Samsung's total '140 trillion won', '80 trillion won in the M17 fabrication plant...20 trillion won in advanced packaging facilities, including the P&T7 plant', and both verbatim Kwak quotes (the break-ground/1H29 quote and the 'most suitable location for rapidly and efficiently constructing a new NAND fabrication plant' quote).

Every monetary figure, quote, fab name, and timeline traces exactly to a cited source. Currency conversions are internally consistent: 100T won/$64.38B and 392T won/$252.5B both imply ~1,552 won/USD. The distinct dates are sourced correctly: M17 breaks ground 'next year' (2027) per Korea Times, matching TrendForce's 'begin in 2027'; packaging 'by late 2027' per Reuters, matching TrendForce's 'end of 2027' for P&T7. No hallucinated specifics detected.

High-quality, accurately sourced News submission. Signature and payload hash valid; all 18 checklist items pass. Every load-bearing figure and quote verified verbatim against on-disk snapshots. The single automated warning (off-allowlist sources) is not a factual defect and does not warrant a corrections record. Chief Editor override from the script's APPROVE_WITH_CORRECTIONS to APPROVE.