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The default tab shown when visiting a rule is the starlark BUILD rule formatted and labels linked to other nodes in the build graph:

Inputs and Outputs

The Io tab displays the rule inputs and predeclared outputs:


The Actions tab displays the rule actions that are spawned by the rule. This is a view of bazel aquery 'outputs(.*, LABEL):


The rule attributes documents the types and values of explicit and implicit attributes:


The dependencies tab allows you to visualize the:

  • reverse dependencies (what other targets depend on this rule within the default workspace)
  • reverse dependencies within package (must faster to compute)
  • rule dependencies (other rules this one depends on)


The Events tab shows the build events following a build/test of this rule:

This is covered in further detail in the build events page.

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