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[Fix] Fast mode loses large Brain query results #1587

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[Fix] Fast mode loses large Brain query results #1587

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84dd96b
fix: keep Fast Brain query results inline
daniel-lxs Aug 24, 2026
cc839d8
fix: let gbrain control Fast query result size
daniel-lxs Aug 24, 2026
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79 changes: 79 additions & 0 deletions packages/cloud-agents/src/server/fast-agent/__tests__/fast-agent-integration-broker.test.ts
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13 changes: 11 additions & 2 deletions packages/cloud-agents/src/server/fast-agent/fast-agent-integration-broker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,7 @@ const FAST_AGENT_INTEGRATION_TOOL_CACHE_TTL_MS = 5 * 60_000;
const FAST_AGENT_INTEGRATION_TOOL_CACHE_RETRY_MS = 30_000;
const FAST_AGENT_INTEGRATION_DISCOVERY_TIMEOUT_MS = 10_000;
const FAST_AGENT_INTEGRATION_CALL_TIMEOUT_MS = 60_000;
const FAST_AGENT_BRAIN_QUERY_DEFAULT_LIMIT = 6;

type IntegrationToolCacheEntry = {
expiresAt: number;
Expand Down Expand Up @@ -329,20 +330,28 @@ export async function callFastAgentIntegration(

try {
const { apiBaseUrl, authToken } = await resolveBrokerAuth(context);
const effectiveArgs =
integration.id === BRAIN_MCP_ID && request.toolName === 'query'
? {
...request.args,
detail: request.args.detail ?? 'low',
adaptive_return: request.args.adaptive_return ?? true,
limit: request.args.limit ?? FAST_AGENT_BRAIN_QUERY_DEFAULT_LIMIT,
}
: request.args;
const result = await withFastIntegrationTimeout(
(signal) =>
callMcpTool({
url: integrationProxyUrl(apiBaseUrl, integration.id),
headers: { Authorization: `Bearer ${authToken}` },
toolName: request.toolName,
args: request.args,
args: effectiveArgs,
toolCallId: `fast:${audit.id}:${integration.id}:${request.toolName}`,
signal,
}),
FAST_AGENT_INTEGRATION_CALL_TIMEOUT_MS,
`Fast ${integration.id}/${request.toolName} integration call`,
);

try {
await completeSlackFastIntegrationCall({
id: audit.id,
Expand Down
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