bug(cli): maka run stop requests fail protocol validation

[jsiu93]

What happened

A foreground tool keeps running after maka run requests a stop:

• With --timeout 10, the CLI returns 1 after 49 seconds and the tool's marker file is present.
• With SIGINT sent after 10 seconds, the CLI returns 130 another 45 seconds later and the marker file is present.
• The request fails with RuntimeHostProtocolError: Unknown turn.stop input field: outcome. void stopPromise.catch(() => {}) consumes the rejection, so users receive zero protocol-error diagnostics while the CLI waits for natural completion.

How to reproduce

WORKSPACE="$HOME/maka-stop-repro"
MARKER="$WORKSPACE/marker"
mkdir -p "$WORKSPACE"
cd "$WORKSPACE"
PROMPT="Execute exactly this one shell command and do nothing else: sh -c 'sleep 40; echo done > $MARKER'. Do not explain."

maka run --connection "$CONNECTION" --model "$MODEL" --yolo --timeout 10 "$PROMPT"
printf 'exit=%s marker=%s\n' "$?" "$(test -f "$MARKER" && echo present || echo absent)"

rm -f "$MARKER"
maka run --connection "$CONNECTION" --model "$MODEL" --yolo "$PROMPT" &
RUN_PID=$!
sleep 10
kill -INT "$RUN_PID"
wait "$RUN_PID"

Expected

The timeout path should stop the tool shortly after 10 seconds, return 1, and leave the marker absent. SIGINT should terminate it promptly, return 130, and leave the marker absent. A rejected stop request should surface a diagnostic.

Root cause

packages/cli/src/runtime-host-run-command.ts:466-468 forwards the entire active Turn object to turn.stop. At runtime that object also contains outcome; the stop-before-start path at packages/cli/src/runtime-host-run-command.ts:330 sends the same object. packages/runtime-host/src/protocol/turn.ts:510 accepts exactly sessionId, turnId, and runId, so protocol decoding rejects the extra field before the request reaches the Host.

Related issues: #3854 covers another client/Host outcome divergence. #3698 and #3713 cover the TUI interrupt path.

Environment

• Maka commit: 4cbe224
• OS: macOS 26.6.1
• Surface: maka run timeout and SIGINT handling
• Node.js: 24.19.0