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fix(circuit-breaker): wire target-aware detection into background manager

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This commit is contained in:
tad-hq
2026-03-17 13:40:46 -06:00
parent 1fdce01fd2
commit 5d5755f29d
2 changed files with 203 additions and 23 deletions
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src/features/background-agent/manager.ts
+26 -23
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@@ -74,7 +74,7 @@ interface MessagePartInfo {
sessionID?: string
type?: string
tool?: string
state?: { status?: string }
state?: { status?: string; input?: Record<string, unknown> }
}
interface EventProperties {
@@ -918,29 +918,32 @@ export class BackgroundManager {
task.progress.lastTool = partInfo.tool
const circuitBreaker = resolveCircuitBreakerSettings(this.config)
if (partInfo.tool) {
task.progress.toolCallWindow = recordToolCall(
task.progress.toolCallWindow,
partInfo.tool,
circuitBreaker
)
task.progress.toolCallWindow = recordToolCall(
task.progress.toolCallWindow,
partInfo.tool,
circuitBreaker,
partInfo.state?.input
)
const loopDetection = detectRepetitiveToolUse(task.progress.toolCallWindow)
if (loopDetection.triggered) {
log("[background-agent] Circuit breaker: repetitive tool usage detected", {
taskId: task.id,
agent: task.agent,
sessionID,
toolName: loopDetection.toolName,
repeatedCount: loopDetection.repeatedCount,
sampleSize: loopDetection.sampleSize,
thresholdPercent: loopDetection.thresholdPercent,
})
void this.cancelTask(task.id, {
source: "circuit-breaker",
reason: `Subagent repeatedly called ${loopDetection.toolName} ${loopDetection.repeatedCount}/${loopDetection.sampleSize} times in the recent tool-call window (${loopDetection.thresholdPercent}% threshold). This usually indicates an infinite loop. The task was automatically cancelled to prevent excessive token usage.`,
})
return
}
if (circuitBreaker.enabled) {
const loopDetection = detectRepetitiveToolUse(task.progress.toolCallWindow)
if (loopDetection.triggered) {
log("[background-agent] Circuit breaker: repetitive tool usage detected", {
taskId: task.id,
agent: task.agent,
sessionID,
toolName: loopDetection.toolName,
repeatedCount: loopDetection.repeatedCount,
sampleSize: loopDetection.sampleSize,
thresholdPercent: loopDetection.thresholdPercent,
})
void this.cancelTask(task.id, {
source: "circuit-breaker",
reason: `Subagent repeatedly called ${loopDetection.toolName} ${loopDetection.repeatedCount}/${loopDetection.sampleSize} times in the recent tool-call window (${loopDetection.thresholdPercent}% threshold). This usually indicates an infinite loop. The task was automatically cancelled to prevent excessive token usage.`,
})
return
}
}
}
const maxToolCalls = circuitBreaker.maxToolCalls