feat: @step(start=True)/@step(end=True) annotations, single-step flows, and node_info metadata#3120

Merged

talsperre merged 16 commits intomasterfrom

romain/worktree/mutate_graph

Apr 28, 2026

Commits on Apr 27, 2026

Modify the graph to allow for single step flows and custom names

romain-intel
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talsperre
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Fix start/end step regressions: events, SFN, cards, argo, graph, lint

talsperre
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Use attribute name as authoritative step identifier in graph
talsperre
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Fix trigger_on_finish and card kwarg backward compat

romain-intel
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talsperre
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Document FunctionSpec contract in DAGNode and _base_step_decorator

romain-intel
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talsperre
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Address P1 review feedback on custom start/end step support

romain-intel
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talsperre
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Migrate test_graph_endpoints_fallback to pytest-mock

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Add composition tests for single-step flows

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Apply black formatting to conftest.py

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Allow bare @step on single-step flows; drop dead underscore filter

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Rebuild card UI bundle for dag.svelte changes

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Simplify transform_flow_graph shape detection

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test: rename single-letter loop vars (s -> step, d -> deco)

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test: split sourceless DAGNode contract into its own file

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test: split card-dag tests out of test_graph_inference

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test: slim _graph_endpoints unit tests, drop redundant happy-path checks

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