v0.1.0-alpha.9

Decoding-Us Navigator — v0.1.0-alpha.9 (prerelease)

⚠️ Ancient ancestry has been removed

The Ancient ancestry breakdown (Hunter-Gatherer / Steppe / Anatolian Farmer) is disabled in this build. If you saw it in alpha.8 or earlier, those numbers were not trustworthy and should be disregarded.

We found the ancient reference data itself was unusable, so the percentages it produced were not a real measurement of your DNA. Three problems, which compounded:

• The "ancient" reference set was mostly modern populations with only five ancient ones appended — so modern groups (e.g. Colombian, Puerto Rican) could show up as "ancient sources".
• The estimator was a classification model ("which single population are you?") rather than an admixture model ("what mixture are you?"). Those are different questions, and only the second one is meaningful here.
• Most seriously, the five ancient reference populations were indistinguishable from modern Europeans in the underlying model — carrying essentially no ancient signal. As a result the same person could get wildly different answers from the same data (Hunter-Gatherer 72.6% from one source, 7.4% from another).

Rather than show numbers we can't stand behind, we've turned the feature off — in the app, in the exported DNA story, in the AI narration, and in anything published to your PDS. Previously computed ancient results are no longer displayed or shared.

This does not affect anything else. Your input data is fine — we verified chip-vs-WGS genotype agreement at 97.7% with zero orientation errors. And your modern ancestry breakdown is sound and stays enabled.

We're rebuilding ancient ancestry properly, on a real ancient-genome reference with a genuine admixture model, and it won't return until it passes validation (including: the same person must get the same answer from a chip and from a WGS). Design notes: docs/design/ancient-ancestry-rebuild.md.

Improved

• The AI DNA story now covers your modern populations. Previously the narration only ever discussed continental ancestry and ancient components, so the story came out "all ancient" — it never mentioned the present-day populations you most resemble, even though the app had already computed them. The story now works through both layers.

From alpha.8 (also included)

• Ancestry now works on GRCh37 and GRCh38 alignments, not just CHM13/T2T.
• One-click "Analyze my DNA" in Simple mode — coverage, paternal/maternal lines, and ancestry in a single step.
• Import no longer silently drops data; delete/re-import cycles work cleanly.
• Automatic BAM/CRAM index building, installer update checks, and compressed reference downloads (~875 MB vs ~3.2 GB).

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Prerelease build. Installers below: macOS .dmg (universal), Windows -setup.exe, Linux .AppImage / .deb. Verify against SHA256SUMS.