chore(#563): cut 1.5.0-beta.1+66 (closed test)

Bump pubspec to 1.5.0-beta.1+66 and add the four release-gate docs for
the first 1.5.0 beta: Experimental section + OKIMesh CoreScope (#509,
#549, #550), About screen (#526, #527), repeater CLI and broker fixes.
Tagged off dev, not promoted to main, so offband.app and production stay
on 1.4.0.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,35 @@
 
 All notable changes to Offband Meshcore. Pre-releases are tagged `-beta.N` / `-rc.N`.
 
+## [1.5.0-beta.1] - 2026-08-04
+
+First beta of the 1.5.0 line, for the closed test track. Introduces an Experimental
+section (with CoreScope), an About screen, and repeater CLI and broker fixes.
+
+### Added
+
+- **Experimental section**, unlocked by a hidden 7-tap on the Build row in settings.
+  Disabling it clears all experimental toggles (#509, #553).
+- **OKIMesh CoreScope integration (Experimental).** Query how many OKIMesh CoreScope
+  observers heard each packet, over the 0xC6 protocol, with an observer/observations
+  badge, adaptive polling with backoff, and tap / long-press to refresh (#549, #550).
+  This is tied specifically to the OKIMesh CoreScope service, not a generic or
+  self-hosted backend. Requires forthcoming Offband firmware (0xC6, cap2 bit and
+  firmware ver code >= 22, tracked in #611); it stays inert on current firmware.
+- **About screen** in its own top-level Settings category, with outbound links to
+  the website, Play listing, and donate page (#526, #527).
+
+### Fixed
+
+- Repeater CLI: late replies are surfaced instead of discarded, commands get their
+  own timeout budget, the armed timeout window is reported accurately, and a
+  prefixed reply only completes the command that owns the prefix (#528, #529, #531,
+  #532, #533).
+- Broker: import never changes the broker enabled state, and a blank-field GET no
+  longer leaks the echoed key line (#469, #470).
+- Channel "Send Again" is gated on `repeatCount == 0` rather than sent status
+  (#555).
+
 ## [1.4.0] - 2026-07-30
 
 A follow-up to the 1.3.0 production launch: settings for headless devices, a

discord/1.5.0-beta.1.md

@@ -0,0 +1,15 @@
+🧪 **Testing build: Offband Meshcore 1.5.0-beta.1** is on the closed test track.
+
+This is the first beta of the 1.5.0 line. It's a testing build, so treat it as not-yet-stable, and your bug reports are exactly what make the production release solid.
+
+**What's new to poke at:**
+
+🔓 **Experimental section.** A hidden **7-tap on the Build row** in settings unlocks an Experimental area. Turning the section back off clears every experimental toggle.
+
+🛰️ **OKIMesh CoreScope (Experimental).** See how many **OKIMesh CoreScope** observers heard each packet, with an observer/observations badge and tap or long-press to refresh. This is tied specifically to OKIMesh's CoreScope, not a generic backend. **Heads-up:** it needs a **forthcoming Offband firmware** (not available for download yet) and stays inert until you're on it. It's here so it's ready to test the moment that firmware ships.
+
+ℹ️ **About screen.** About now has its own Settings category with links to the website, Play listing, and donate page.
+
+🛠️ **Fixes:** steadier repeater CLI (late replies, timeout budgets), broker import no longer touches the enabled state or leaks a key line, and channel "Send Again" gating.
+
+Not on the test track yet and want in? Ask here. Thanks for testing. 📡

play/1.5.0-beta.1.txt

@@ -0,0 +1,3 @@
+Offband Meshcore 1.5.0-beta.1 (closed test)
+
+A testing build of the 1.5.0 line. New: an Experimental section unlocked by a 7-tap on the Build row, with OKIMesh CoreScope (per-packet observer counts from OKIMesh's service) inside it. Note it needs a forthcoming Offband firmware and stays inert until then. Also a new About screen with website, Play, and donate links, plus repeater CLI and broker import fixes. Bug reports welcome.

pubspec.yaml

@@ -16,7 +16,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.4.0+65
+version: 1.5.0-beta.1+66
 
 environment:
   sdk: ^3.9.2

release-notes/1.5.0-beta.1.md

@@ -0,0 +1,34 @@
+## Offband Meshcore 1.5.0-beta.1
+
+First beta of the 1.5.0 line, for the closed test track. This is a testing build,
+so features here are still being proven. Bug reports are what make the production
+releases solid.
+
+### New to test
+
+- **Experimental section.** A hidden **7-tap on the Build row** in settings unlocks
+  an Experimental area. Turning the section off again clears every experimental
+  toggle (#509, #553).
+- **OKIMesh CoreScope (Experimental).** See how many **OKIMesh CoreScope** observers
+  heard each packet: an observer / observations badge with adaptive polling and tap
+  or long-press to refresh (#549, #550). This is tied specifically to OKIMesh's
+  CoreScope service, not a generic or self-hosted backend.
+  - **Heads-up:** it needs a **forthcoming Offband firmware** (0xC6 support, firmware
+    ver code 22 or newer, tracked in #611) that is **not yet available for download**.
+    Until you are on that firmware it stays inert. This is here so it is ready to test
+    the moment the firmware ships.
+- **About screen.** About now lives in its own Settings category, with links out to
+  the website, the Play listing, and the donate page (#526, #527).
+
+### Fixed
+
+- **Repeater CLI** is steadier: late replies are surfaced instead of dropped,
+  commands have their own timeout budget, the reported timeout window matches what
+  was actually armed, and a prefixed reply only completes the command that owns the
+  prefix (#528, #529, #531, #532, #533).
+- **Broker import** never flips the broker enabled state, and a blank-field GET no
+  longer leaks the echoed key line (#469, #470).
+- **Channel "Send Again"** is gated correctly on the repeat count (#555).
+
+Thanks for testing. If something acts weird, that is exactly what this track is for,
+and your reports keep production solid for everyone.