refactor: migrate messaging plugins to sdk

CHANGELOG.md

@@ -13,29 +13,18 @@ Docs: https://docs.clawd.bot
 ### Fixes
 - Auth profiles: keep auto-pinned preference while allowing rotation on failover; user pins stay locked. (#1138) — thanks @cheeeee.
 - macOS: avoid touching launchd in Remote over SSH so quitting the app no longer disables the remote gateway. (#1105)
-
 ## 2026.1.18-3
 
 ### Changes
 - Exec: add host/security/ask routing for gateway + node exec.
-- Exec: add `/exec` directive for per-session exec defaults (host/security/ask/node).
 - macOS: migrate exec approvals to `~/.clawdbot/exec-approvals.json` with per-agent allowlists and skill auto-allow toggle.
 - macOS: add approvals socket UI server + node exec lifecycle events.
-- Nodes: add headless node host (`clawdbot node start`) for `system.run`/`system.which`.
-- Nodes: add node daemon service install/status/start/stop/restart.
-- Bridge: add `skills.bins` RPC to support node host auto-allow skill bins.
-- Slash commands: replace `/cost` with `/usage off|tokens|full` to control per-response usage footer; `/usage` no longer aliases `/status`. (Supersedes #1140) — thanks @Nachx639.
-- Sessions: add daily reset policy with per-type overrides and idle windows (default 4am local), preserving legacy idle-only configs. (#1146) — thanks @austinm911.
-- Agents: auto-inject local image references for vision models and avoid reloading history images. (#1098) — thanks @tyler6204.
+- Plugins: ship Discord/Slack/Telegram/Signal/WhatsApp as bundled channel plugins via the shared SDK (iMessage now bundled + opt-in).
 - Docs: refresh exec/elevated/exec-approvals docs for the new flow. https://docs.clawd.bot/tools/exec-approvals
-- Docs: add node host CLI + update exec approvals/bridge protocol docs. https://docs.clawd.bot/cli/node
-- ACP: add experimental ACP support for IDE integrations (`clawdbot acp`). Thanks @visionik.
 
 ### Fixes
-- Exec approvals: enforce allowlist when ask is off; prefer raw command for node approvals/events.
 - Tools: return a companion-app-required message when node exec is requested with no paired node.
-- Streaming: emit assistant deltas for OpenAI-compatible SSE chunks. (#1147) — thanks @alauppe.
-- Model fallback: treat timeout aborts as failover while preserving user aborts. (#1137) — thanks @cheeeee.
+- Tests: avoid extension imports when wiring plugin registries in unit tests.
 
 ## 2026.1.18-2