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AlexRV12andClaude Opus 5 0df128cc93 feat: let operators compose flows when the workspace grants the right

Adds operator_settings.builder_flows: a workspace setting that lets every
operator compose flows out of runnables that already exist. It does not make
them authors. The boundary the operator role draws is authoring code and running
arbitrary code, and this does not move it: check_flow_is_composition_only walks
the value and refuses anything carrying code, including the shapes an obvious
walk misses (code hoisted into a flow_node, an AI agent step's tools, and a
linked ai_agent resource whose tool list is resolved at run time).

What the walk cannot settle it returns for the caller to authorize under RLS:
the worker tags the steps pin, every runnable they reference, and the (path,
hash) of every version-pinned step. Composing a path is enough to run it and to
run it as whoever it runs as, since the worker resolves a step's path with the
root DB handle and adopts that runnable's on_behalf_of. A pinned hash needs its
own check because dispatch ignores the path beside it.

The gate runs on every write and on both request-supplied-value paths, flow
preview and flow dependencies, or either becomes the way to run what the write
path refuses.

Operators of a builder workspace consume a full author seat; the EE companion
carries the counting.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Dsf6VC4MVLisiEoeQkgbr4

2026-09-18 17:53:11 +02:00