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Workflows can now set graph-level on_failure="exit" to stop after a failed node when no explicit recovery route matches. Fabro skips the unconditional edge, checks configured retry targets, and ends the run as failed if no retry target exists. The default on_failure="route" preserves existing workflow behavior. A node can also set its own on_failure to override the graph policy in either direction: a best-effort node can use on_failure="route" inside an exit graph, or a single critical node can use on_failure="exit" while the rest of the graph keeps the default.

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Model stylesheet templates

The root graph’s model_stylesheet now supports MiniJinja templates. A stylesheet can use typed run inputs and server-managed variables through inputs and vars. Conditions, loops, filters, macros, local values, and static includes use the same template engine as workflow goals and prompts. Fabro renders the stylesheet before parsing and applying its rules. Undefined values produce the existing template_undefined_variable diagnostic. Offline validation skips stylesheet syntax checks until those values are available, which avoids a second error from incomplete generated stylesheet text. Stylesheet templates do not expose goal, env, or secrets. Stylesheets on imported graphs remain ignored and now produce an imported_model_stylesheet_ignored warning.