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fix: cap cron context messages (#1103) (thanks @mkbehr)

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This commit is contained in:
Peter Steinberger
2026-01-22 03:52:03 +00:00
parent ffbf75d740
commit 654f9e5053
3 changed files with 52 additions and 6 deletions
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21
src/agents/tools/cron-tool.ts
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@@ -16,6 +16,7 @@ const CRON_ACTIONS = ["status", "list", "add", "update", "remove", "run", "runs"
const CRON_WAKE_MODES = ["now", "next-heartbeat"] as const;
const REMINDER_CONTEXT_MESSAGES_MAX = 10;
const REMINDER_CONTEXT_PER_MESSAGE_MAX = 220;
const REMINDER_CONTEXT_TOTAL_MAX = 700;
const REMINDER_CONTEXT_MARKER = "\n\nRecent context:\n";
@@ -33,7 +34,9 @@ const CronToolSchema = Type.Object({
patch: Type.Optional(Type.Object({}, { additionalProperties: true })),
text: Type.Optional(Type.String()),
mode: optionalStringEnum(CRON_WAKE_MODES),
contextMessages: Type.Optional(Type.Number()),
contextMessages: Type.Optional(
Type.Number({ minimum: 0, maximum: REMINDER_CONTEXT_MESSAGES_MAX }),
),
});
type CronToolOptions = {
@@ -88,7 +91,11 @@ async function buildReminderContextLines(params: {
gatewayOpts: GatewayCallOptions;
contextMessages: number;
}) {
if (params.contextMessages <= 0) return [];
const maxMessages = Math.min(
REMINDER_CONTEXT_MESSAGES_MAX,
Math.max(0, Math.floor(params.contextMessages)),
);
if (maxMessages <= 0) return [];
const sessionKey = params.agentSessionKey?.trim();
if (!sessionKey) return [];
const cfg = loadConfig();
@@ -97,13 +104,13 @@ async function buildReminderContextLines(params: {
try {
const res = (await callGatewayTool("chat.history", params.gatewayOpts, {
sessionKey: resolvedKey,
limit: 12,
limit: maxMessages,
})) as { messages?: unknown[] };
const messages = Array.isArray(res?.messages) ? res.messages : [];
const parsed = messages
.map((msg) => extractMessageText(msg as ChatMessage))
.filter((msg): msg is { role: string; text: string } => Boolean(msg));
const recent = parsed.slice(-params.contextMessages);
const recent = parsed.slice(-maxMessages);
if (recent.length === 0) return [];
const lines: string[] = [];
let total = 0;
@@ -126,7 +133,7 @@ export function createCronTool(opts?: CronToolOptions): AnyAgentTool {
label: "Cron",
name: "cron",
description:
"Manage Gateway cron jobs (status/list/add/update/remove/run/runs) and send wake events. Use `jobId` as the canonical identifier; `id` is accepted for compatibility. Use `contextMessages` to add previous messages as context to the job text.",
"Manage Gateway cron jobs (status/list/add/update/remove/run/runs) and send wake events. Use `jobId` as the canonical identifier; `id` is accepted for compatibility. Use `contextMessages` (0-10) to add previous messages as context to the job text.",
parameters: CronToolSchema,
execute: async (_toolCallId, args) => {
const params = args as Record<string, unknown>;
@@ -152,7 +159,9 @@ export function createCronTool(opts?: CronToolOptions): AnyAgentTool {
}
const job = normalizeCronJobCreate(params.job) ?? params.job;
const contextMessages =
typeof params.contextMessages === "number" ? params.contextMessages : 0;
typeof params.contextMessages === "number" && Number.isFinite(params.contextMessages)
? params.contextMessages
: 0;
if (
job &&
typeof job === "object" &&