chore(release): prepare v0.1.9

.github/workflows/notify-release.yaml

@@ -0,0 +1,42 @@
+name: Notify Release
+
+on:
+  push:
+    tags:
+      - v*
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Release tag to simulate"
+        required: true
+
+jobs:
+  discord:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Prepare env
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            echo "TAG=${{ github.event.inputs.tag }}" >> "$GITHUB_ENV"
+          else
+            echo "TAG=${GITHUB_REF_NAME}" >> "$GITHUB_ENV"
+          fi
+
+      - name: Read changelog
+        id: changelog
+        uses: andstor/file-reader-action@v1
+        with:
+          path: "docs/changelogs/${{ env.TAG }}.md"
+
+      - name: Notify Discord
+        uses: rjstone/discord-webhook-notify@v2
+        with:
+          webhookUrl: ${{ secrets.DISCORD_WEBHOOK_URL }}
+          username: FoundationForecast Releases
+          severity: info
+          title: "🚀 New release ${{ env.TAG }}"
+          description: "Changelog: https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/${{ env.TAG }}.md"
+          details: ${{ steps.changelog.outputs.contents }}
+          footer: "pushed via GitHub Actions"

README.md

@@ -118,10 +118,11 @@ Some models require specific Python versions (e.g. FlowState 3.11-3.13, TabPFN &
 
 ## News
 
-Recent additions and checkpoints (newest first). See the [changelog](https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/v0.1.8.md) for full release notes.
+Recent additions and checkpoints (newest first). See the [changelog](https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/v0.1.9.md) for full release notes.
 
 | When | What | Checkpoint / detail |
 |------|------|---------------------|
+| Sep 2026 | **Quantile interpolation** | Arbitrary `level` / `quantiles` on fixed-knot models with edge clamping; removed `level=0` sentinel ([v0.1.9](https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/v0.1.9.md)) |
 | Sep 2026 | [**Granite PatchTST-FM r2**](https://huggingface.co/ibm-granite/granite-timeseries-patchtst-fm-r2) | `ibm-granite/granite-timeseries-patchtst-fm-r2` — Apache-2.0 / OpenMDW; requires `granite-tsfm>=0.3.9` ([v0.1.8](https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/v0.1.8.md)) |
 | Sep 2026 | [**T0 beta**](https://huggingface.co/theforecastingcompany/t0-beta) | `theforecastingcompany/t0-beta` — requires `tfc-t0>=0.5.0` ([v0.1.8](https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/v0.1.8.md)) |
 | Sep 2026 | **TiRex-2 zeroshot (GIFT-Eval CI)** | `NX-AI/TiRex-2-gifteval-zs` added to gift-eval replication ([v0.1.8](https://github.com/TimeCopilot/foundationforecast/blob/main/docs/changelogs/v0.1.8.md)) |

docs/changelogs/index.md

@@ -2,6 +2,7 @@
 
 Welcome to the FoundationForecast Changelog. Here you will find a list of changes, updates, and improvements for each release. Explore the details of each version below.
 
+- [v0.1.9](v0.1.9.md)
 - [v0.1.8](v0.1.8.md)
 - [v0.1.7](v0.1.7.md)
 - [v0.1.6](v0.1.6.md)

docs/changelogs/v0.1.9.md

@@ -0,0 +1,37 @@
+### Features
+
+* **Quantile interpolation for arbitrary `level` and `quantiles`**: Fixed-knot models (TiRex, TimesFM, TabPFN, FlowState, Tafsut, Toto 2.0, and others) always run their native quantile knots, then linearly interpolate (with edge clamping) to any requested prediction level or quantile. PatchTST-FM continues to evaluate quantiles natively in the 0.01–0.99 range.
+
+    ```python
+    import pandas as pd
+    from foundationforecast.models.tirex import TiRex
+
+    df = pd.read_csv(
+        "https://timecopilot.s3.amazonaws.com/public/data/air_passengers.csv",
+        parse_dates=["ds"],
+    )
+    model = TiRex()
+    fcst = model.forecast(df, h=12, freq="MS", level=[50, 80])
+    assert "TiRex-lo-50" in fcst.columns
+    ```
+
+* **`foundationforecast.core.quantiles`**: Shared helpers (`interpolate_quantiles`, `resolve_quantile_values`, `backend_quantile_levels`, `select_clipped_quantile_values`) and documentation for edge clamping when requests fall outside a model's supported quantile range. Output column names always reflect the user's request.
+
+* **PatchTST-FM family example notebook**: Added [`patchtst-fm-family.ipynb`](../examples/patchtst-fm-family.ipynb) comparing IBM Research and Granite PatchTST-FM r1/r2 checkpoints.
+
+### Fixes
+
+* **Removed undocumented `level=0` sentinel**: Point forecasts always appear in the model alias column; pass standard `level` values or `quantiles=` directly.
+* **TimesFM v1**: Restore default quantiles on point-only forecasts; strip native q-columns before assigning interpolated output.
+* **FlowState / TimesFM v2–v3**: Drop legacy exact-length quantile guards in favor of interpolation.
+* **Chronos**: Map clipped quantiles on the last axis after batching `(batch, horizon, n_quantiles)` tensors.
+* **Duplicate quantile columns**: Reject requests whose `int(100 × quantile)` suffixes collide (for example `0.151` and `0.159`).
+
+### Documentation
+
+* Expanded [Probabilistic forecasting](../forecasting-parameters.md) with interpolation, edge clamping, and native-backend clamping behavior.
+* Updated TiRex, TimesFM, TabPFN, and related family notebooks for the new API.
+
+---
+
+**Full Changelog**: https://github.com/TimeCopilot/foundationforecast/compare/v0.1.8...v0.1.9

mkdocs.yml

@@ -42,6 +42,7 @@ nav:
       - Contributing: contributing.md
   - Changelogs:
       - changelogs/index.md
+      - changelogs/v0.1.9.md
       - changelogs/v0.1.8.md
       - changelogs/v0.1.7.md
       - changelogs/v0.1.6.md

pyproject.toml

@@ -73,7 +73,7 @@ license = "Apache-2.0"
 name = "foundationforecast"
 readme = "README.md"
 requires-python = ">=3.10"
-version = "0.1.8"
+version = "0.1.9"
 
 [project.optional-dependencies]
 plot = [