[markhammond]

Adds two model families, a quantile-forecaster interface shared with TimesFM, batch forecasting for every model, and a host-chosen Kronos seeding policy. All packages move to 0.2.0.

Changes

t0 — Tsfm.Forecasting.T0 (new, Apache-2.0). t0-alpha and t0-beta, ported from tfc-t0 0.6.0. Same call shape as TimesFM (ForecastJoint with known-future flags, Forecast over OHLCVA). Accepts any context length (left-padded and masked) and decodes up to 1024 steps per pass. Each checkpoint's scaler convention is read from its config.json. No weights are packaged, because both checkpoints exceed nuget.org's 250 MB limit; the README has pinned, checksummed download commands.

Timestral — Tsfm.Forecasting.Timestral (new, Apache-2.0). Timestral 5M/28M/123M/209M, ported from mistralai/timestral 1.0.0. Applies the reference forecaster's defaults (symmetric averaging, non-negative clipping, refine frame, quantile cap) so published numbers reproduce. The averaging's negated input runs in the same forward pass as the original rather than a second call, which makes the port faster than Python on CPU at every size (5M: 11 vs 19 ms; 209M: 138 vs 191 ms).

Timestral weights — .Weights.5M, .Weights.28M (new). Embedded at pinned revisions; the build checks each payload's SHA-256. They are under Mistral's Modified MIT licence, which is revenue-restricted (USD 20M/month), not open source:

• the licence ships as each package's LICENSE.txt, set via PackageLicenseFile, and must be accepted on install;
• the repo's MIT LICENSE is not packed into these two packages.

Shared interface and batching.

• IQuantileForecaster (core) is implemented by TimesFM, t0 and Timestral.
• ForecastJointBatch / ForecastBatch take ReadOnlyMemory entries and write [entry][step][quantile] into a caller-sized span.
• t0 and Timestral batch arbitrary entries in one pass; TimesFM stacks entries of the same shape.
• KronosForecaster.InferBatch forecasts the final window of many instruments in one pass.
• Core also gains IModelWeights for tokenizer-free checkpoints.

Kronos seeding policy. KronosForecaster.Seed decides each window's random draws from its anchor bar and a series key. The default AnchorTime keeps the 0.1.x behaviour; PerSeries gives each SeriesKey its own stream; Salted derives a fresh, reproducible run from either.

Tooling.

• scripts/pack.sh: fetches the weights, packs, verifies, and prints the upload order.
• Fetch scripts for t0 and Timestral, with pinned revisions and SHA-256 checks.
• CI runs the new weight-free tests, and fetches the 5M/28M weights for the pack job.

Compatibility

• TimesFM and Kronos single calls produce bit-identical output to 0.1.3, checked against captured 0.1.3 outputs after both were refactored onto the batch paths.
• Binary-breaking: KronosForecaster.Infer/InferPath gain a trailing optional seriesKey. Callers' source is unchanged, but code compiled against 0.1.3 must be recompiled.

Verification

• t0 parity (tests/Tsfm.Forecasting.T0.Parity), both checkpoints: scaling and masks match exactly; layers within 6e-7 relative; forecasts within 5e-7. Includes the quickstart notebook's electricity-price and M4 examples.
• Timestral parity (tests/Tsfm.Forecasting.Timestral.Parity), all four sizes, defaults on and off: every stage within 1.5e-6 relative, forecasts within 9e-7, including the covariate path and a mixed batch.
• Tests: t0 27, Timestral 14 weight-free + 7 on the embedded weights, Kronos integration 10, TimesFM 9, Kronos unit 16. All pass.
• Packaging: dotnet pack + verify-packages.sh pass for all 9 packages. Each package's licence was checked in its packed .nuspec.