Add local in-memory pubsub

README.md

@@ -91,6 +91,7 @@ The bootstrap implementation provides:
   `geth db status <name>`
 - local SQLite-backed KV commands: `geth kv create/set/get`
 - local document resource registration: `geth document create/status`
+- local daemon-lifetime pubsub snapshots: `geth pubsub pub/sub`
 - SSH certificate flow metadata:
   - `geth ssh cert request --public-key <path> --principal <name>`
   - `geth ssh cert requests`
@@ -101,7 +102,7 @@ The bootstrap implementation provides:
   - `geth ssh revocation list`
   - `geth ssh revocation export --out <path>`
 
-Other command groups exist as explicit stubs: `pipe`, `pubsub`, and `ssh`.
+Other command groups exist as explicit stubs: `pipe` and `ssh`.
 
 ## Resource Modules
 
@@ -111,7 +112,8 @@ Everything meaningful is modeled as a resource. Planned resource kinds are:
 - `kv`: Iroh Documents backed key-value stores
 - `pipe`: dumbpipe-like byte streams over Iroh
 - `document`: Automerge documents over Iroh streams
-- `pubsub`: lossy notifications, not authoritative storage
+- `pubsub`: lossy notifications, not authoritative storage; the bootstrap
+  keeps only an in-memory daemon-lifetime ring buffer
 - `cas`: content-addressed blob storage and distribution
 - `ssh-proxy`: authorized SSH proxy/admin access over Iroh