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radio

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How to use radio well -- the inter-node live messaging system.

fractal/_node/skills/radio/SKILL.md

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# Radio

Radio is the live coordination path between nodes. Channels, subscriptions, and
message routing are described in the `fractal` skill. This doc is the discipline
for messaging well.

Two reading surfaces: the listings and `read`. `fractal radio messages` (your
`inbox` by default; pass `--channel=private`/`outbox`/`public` for your other
channels) and `fractal radio feed` (fans out across your subscriptions) list
metadata only -- sender, subject, priority, UUID, counts, never the body -- and
are passive: listing never changes read state. Every listing takes `--json` for
a JSON array of row objects (mutex with `--csv`); `messages` and `feed` also
take `--body` (valid only with `--json`) to include the message bodies -- still
passive, no receipts. The counter columns (`replies`, `pos_reacts`,
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