diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1c9f74f14..3b5a7463a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## 1.1.1 — Unreleased
+## 1.2.0 — Unreleased
 
 ### Changes
 - Web relay now supports configurable command heartbeats (`inbound.reply.heartbeatMinutes`, default 30m) that ping Claude with a `HEARTBEAT_OK` sentinel; outbound messages are skipped when the token is returned, and normal/verbose logs record each heartbeat tick.
diff --git a/src/cli/program.ts b/src/cli/program.ts
index c1d8f8af7..a27c6920d 100644
--- a/src/cli/program.ts
+++ b/src/cli/program.ts
@@ -181,6 +181,10 @@ Examples:
     .description("Trigger a heartbeat poll once (web provider, no tmux)")
     .option("--provider <provider>", "auto | web", "auto")
     .option("--to <number>", "Override target E.164; defaults to allowFrom[0]")
+    .option(
+      "--session-id <id>",
+      "Force a session id for this heartbeat (resumes a specific Claude session)",
+    )
     .option(
       "--all",
       "Send heartbeat to all active sessions (or allowFrom entries when none)",
@@ -194,6 +198,7 @@ Examples:
   warelay heartbeat                 # uses web session + first allowFrom contact
   warelay heartbeat --verbose       # prints detailed heartbeat logs
   warelay heartbeat --to +1555123   # override destination
+  warelay heartbeat --session-id <uuid> --to +1555123   # resume a specific session
   warelay heartbeat --all           # send to every active session recipient or allowFrom entry`,
     )
     .action(async (opts) => {
@@ -246,6 +251,7 @@ Examples:
             to,
             verbose: Boolean(opts.verbose),
             runtime: defaultRuntime,
+            sessionId: opts.sessionId,
           });
         }
       } catch {