v0.18.0

Adds observer slots, unifies binding and pairing into links, reworks zenoh config, and spans stack list across daemons.

Released on July 23, 2026

The peppy auth command group is renamed to peppy platform; update any commands or scripts that call peppy auth.
The --bind and --pair flags are replaced by a single --link flag; switch your commands to use --link.
Launch files now use unified links and defer_links fields in place of the previous separate binding and pairing entries; migrate your launch files to the new fields.
Zenoh settings in peppy_config.json5 are restructured into a zenoh section with tagged zenoh.managed and zenoh.external blocks, replacing the flat zenoh, zenohd, and peer fields, and unknown fields under zenoh are now rejected; move your settings into the new blocks. The new zenoh.external block lets peppy run against an operator-managed zenoh router.
peppy stack list no longer prints DOT graph output; it now always renders a report of per-core-node sections aggregated across every live daemon, including live instance counts and the answering daemon's identity, so update anything that parsed the old graph output.
Generated peppygen modules for slots are now nested at <category>/<link_id>/<member>; update the import paths for your generated code.
The PEPPY_DAEMON_STATE_FILE environment override is removed; the daemon state file now lives under $PEPPY_HOME, so stop setting PEPPY_DAEMON_STATE_FILE.
The "organization"/"org-id" concept is renamed to "workspace"/"namespace" across authentication and daemon output; update references and scripts that use the old terms.

Nodes can now declare observer slots to observe topics, with generated observer bindings (including an ObservedSource type) and delivery of observers to running nodes.
Guides and launch-file documentation now cover observer slots and the links/defer_links model.

Daemons can participate in a federated peer topology across zenoh routers.
Federation-aware CLI commands now surface listener and serve errors instead of hanging.

Removing a node with node remove --stop-instances now also dissolves that node's links.
A new PEPPY_CONFIG environment variable overrides the daemon config file path.
Only one peppy daemon can run per $PEPPY_HOME data root, enforced by an exclusive singleton lock.
Config drift now logs which peppy_config.json5 settings it adds when completing missing defaults.
Newly generated core-node default names use the compact cn-{adj}-{surname} format instead of the longer core-node-{adj}-{surname}-{4digits}-{10digits} form.
The bundled Cap'n Proto compiler is now installed under $PEPPY_HOME/bin, and its location is documented.

External federation guidance adds a dedicated section on namespace handling outside the Peppy platform.