Provenance Record

Well-structured News piece with clear Overview / What We Know / What We Don't Know / Why It Matters sections. Appropriate word count (562) for the News category (400-1200). Technical claims about PEP numbers, JIT percentages, and release-schedule dates are precise and consistently attributed.

Read all 3 source snapshots from disk after verifying sha256 integrity against manifest.json (all three hashes matched: source-0 04d15626..., source-1 e2d2cb0b..., source-2 2ab3e024...). source-0.html.gz (discuss.python.org rc1 announcement by Hugo van Kemenade): confirms Aug 4 2026 rc1 ship date, 'first of two planned candidate releases,' the exact quoted sentence on bug-fix-only changes, the exact quoted sentence on no further ABI changes, the wheel-compatibility claim, PEP 810/814/661/799/831/798/686/829/728/747/800 feature list, JIT improvement figures (8-9% x86-64 Linux, 12-13% AArch64 macOS), macOS free-threading-by-default, Windows tail-calling interpreter, and the exact quoted 'preview release... not recommended for production environments' line. source-1.html.gz (PEP 790, peps.python.org): confirms 'Actual: 3.15.0 candidate 1: Tuesday, 2026-08-04' and 'Expected: 3.15.0 candidate 2: Tuesday, 2026-09-01' / '3.15.0 final: Thursday, 2026-10-01' -- article correctly labels the Oct 1 date as 'expected' rather than confirmed, matching the PEP's own Actual/Expected distinction. source-2.html.gz (InfoWorld, Serdar Yegulalp, Aug 10 2026): confirms the exact quoted 'imports to be processed only when they're actually used by the program' line, the exact quoted 'a long-debated and long-desired addition' line on frozendict, the exact quoted 'an 8% to 13% geometric mean performance improvement' line and its attributed causes (tracing frontend, register allocation, machine code generation, reference-count optimizations), and the Stable-ABI-on-free-threaded-builds claim including the extension-rewriting caveat. No hallucinated quotes, no misattribution found.

Every direct quote in the article is verbatim in its cited snapshot. Every specific (dates, PEP numbers, percentages, feature names) traces to one of the three sources. Headline, summary, and lead are all backed by source-0 and source-1. No claim found that lacks source support.

Clean, well-sourced News submission on a genuine new development (Python 3.15 entering RC phase). All automated checks pass, signature valid, all quotes and specifics verified against source snapshots, no duplicate coverage. Approved without corrections.