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[v3-4-test] Let plugins add their own actions to Dag, run and task instance rows (#75229) - #75427
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…pache#75229) Airflow draws a fixed set of actions beside a Dag, a Dag Run and a Task Instance -- trigger, clear, mark state -- and a plugin had no way to put anything next to them. A plugin could add a whole page as a tab, but not a single button on the row or header card where the user already is, so the work it offers for one entity had to be reached by navigating away from that entity. An action is either a `link`, which opens a URL templated with the entity's context, or `react`, which mounts the plugin's own component behind a trigger button. The React kind is handed `open`, `onClose` and `triggerRef` and portals whatever surface it wants -- a popover, a dialog, a drawer -- rather than being given a modal to fill, because the right surface depends on what the plugin is showing. Actions are scoped by the same `applies_to` field paths as tabs and panels, through the same matchers, so a button can be offered only where it applies: only on failed task instances, only on Dags of a given team. That is the reason the two were designed together. A React action's `name` is the global its bundle registers under, so it cannot share one with a React App or another React action -- the second to load would silently win. Such an action is refused rather than loaded. (cherry picked from commit c510e4d)
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October 22, 2026 19:43
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Backport of #75229 to
v3-4-test.The automatic backport workflow failed on a transient GitHub API error in its "Get PR information" step (run 39811753215), so it never attempted the cherry-pick. Picked by hand from c510e4d — it applied with no conflicts, and the resulting diff matches the original commit line for line.
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