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docs(runner): add issue #26 references to orphan process prevention comments #40

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labtgbot merged 1 commit into from
Jun 15, 2026
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docs(runner): add issue #26 references to orphan process prevention comments #40

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9 changes: 7 additions & 2 deletions src/agent/tools/exec/runner.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -19,12 +19,17 @@ const PDEATHSIG_HELPER = new URL("../../../../bin/prctl-pdeathsig", import.meta.
export const MAX_CONCURRENT = 10;
let activeCount = 0;

/** Registry of all spawned child processes for cleanup on agent stop. */
/**
* Registry of all spawned child processes for cleanup on agent stop.
* Prevents orphan/zombie process accumulation when the agent exits
* (graceful shutdown, SIGTERM, or uncaught exception). See issue #26.
*/
const spawnedProcesses = new Set<ReturnType<typeof spawn>>();

/**
* Kill all spawned child processes that are still running.
* Called during agent shutdown to prevent zombie process accumulation.
* Called during agent shutdown (stopAgent) and on process.exit
* to prevent orphan processes from surviving the agent (issue #26).
*/
export function killAllSpawnedProcesses(): void {
for (const child of spawnedProcesses) {
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