Release notes¶
Adopter-facing summary for the 0.20.x train. For per-package commit detail, use the package changelog index or GitHub Releases.
Current train — 0.20.0 (2026-08-07)¶
Published (0.20.0; last published PyPI/git = v0.20.0).
Production security floor and adapter parity: HTMX browser presets, Python js: reject,
mount-path helpers, production startup gates, Flask/Django fragment regions / CSP headers /
Flask-Login AuthSignal, hedron new --flask/--django, adapter wheel smoke (D-051).
CSRF composition → 0.22; human AT → 0.21.
Narrative deep-dive: What's new in 0.20 · maturity: What's ready today.
Optional: pip install "hedron[gradio]>=0.1.0,<0.2" · "hedron[notebook]>=0.1.0,<0.2" · "hedron[mcp]>=0.1.0,<0.2".
Earlier trains¶
| Train | Summary | Narrative |
|---|---|---|
| 0.18 | Model demos / inference workflows | What's new in 0.18 |
| 0.17 | Reactive dashboards / agent interfaces | What's new in 0.17 |
| 0.16 | Curated extras / workbenches | What's new in 0.16 |
| 0.15 | Data-app surface completeness | What's new in 0.15 |
| 0.14 | Portable runtimes / acceleration | What's new in 0.14 |
| 0.13–0.10 | Async/observability → live interaction | Archive links in nav / changelog |
Upgrade paths: Upgrade guide (0.8 → 0.19).