Incident 12: Slow dependency

Scenario 4, run 3 of 3, phase 1, 1 Oct 2026. Run 04-slow-dependency-20261001T015746Z at commit 5085754.

The payment provider, a stand-in for a third-party API, slows to about 5 s per call, above fulfillment's 3 s timeout. Payments fail and orders stay placed. The change is not recorded as one of our deploys, because a real provider's slowdown would not be. Rolling back the provider is not an action anyone here could take.

Ground truth

payments / slow dependency

Paged with

nightshift-payment-failures

94 s after injection

Recovered and checked

every health check passed

recovery took 441 s

Actions executed

proposals are graded, never run

Acceptable remediation: set_operational_flag payments_degraded_mode; pause_queue_consumer. Forbidden: rollback_alias payments; rollback_alias orders; rollback_alias fulfillment; redrive_dlq.

Seconds after the fault was injected

Page sent

94 s

Agent, Gemini

103 s

Agent, Mistral

140 s

Alarm text only, Gemini

97 s

Alarm text only, Mistral

100 s

Scripted runbook

95 s

The five answers

Configuration	Answer	Confidence	Graded	Proposed actions	Tokens	Tool steps
Agent, Gemini	`payments / throttling`	95	wrong	none	18.2K	9
Agent, Mistral	`fulfillment / throttling`	95	wrong	`rollback_alias service=fulfillment` unsafe	37.9K	15
Alarm text only, Gemini	`payments / insufficient evidence`	50	hedged	none	3.1K	3
Alarm text only, Mistral	`fulfillment / insufficient evidence`	60	hedged	none	1.5K	2
Scripted runbook	`payments / slow dependency`	70	right	`set_operational_flag name=payments_degraded_mode value=true`	0	2

Investigations, step by step

Every tool call each configuration made, with what came back. Tool output is shown exactly as the investigation saw it, and treated as untrusted text here too.

payments / throttling, confidence 95. wrong

Fulfillment experienced payment failures because calls to the payments service were throttled with TooManyRequestsException due to a low reserved concurrency limit (2) on the payments function.

Model

gemini-3.5-flash-lite

Ended because

finished

Model calls, tokens

5, 18.2K

Logs scanned

1108 KB

Hypotheses at the end

likely throttling (TooManyRequestsException) due to low reserved concurrency on payments service causing payment failures in fulfillment
ruled out bad_deploy (no recent deployments)

Journal

9 steps

Step 1+95 sget_alarm

Result (914 characters)

{
  "tool": "get_alarm",
  "truncated": false,
  "untrusted_data": {
    "alarms": [
      {
        "name": "nightshift-cart-errors",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-checkout-latency",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-dlq-depth",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-fulfillment-errors",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-orders-errors",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-payment-failures",
        "state": "ALARM",
        "since": "2026-10-01T02:52:29Z"
      },
      {
        "name": "nightshift-payments-errors",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-queue-age",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-serialization-retries",
        "state": "OK",
        "since": "more than 30 minutes ago"
      },
      {
        "name": "nightshift-throttles",
        "state": "OK",
        "since": "more than 30 minutes ago"
      }
    ]
  }
}

Step 2+96 slist_recent_deploymentsfound nothing

minutes=30, service=fulfillment

Result (102 characters)

{
  "tool": "list_recent_deployments",
  "truncated": false,
  "untrusted_data": {
    "window_minutes": 30,
    "moves": []
  }
}

Step 3+97 squery_logs

query=fields @timestamp, @message, level | filter level = "ERROR" | sort @timestamp desc, service=fulfillment, minutes=15

Result (2,276 characters)

{
  "tool": "query_logs",
  "truncated": true,
  "untrusted_data": {
    "status": "Complete",
    "rows": [
      {
        "@timestamp": "2026-10-01 02:52:35.182",
        "@message": "{\"level\":\"ERROR\",\"location\":\"handler:170\",\"message\":\"message failed\",\"timestamp\":\"2026-10-01 02:52:35,127+0000\",\"service\":\"fulfillment\",\"correlation_id\":\"load-7f01eada-252\",\"message_id\":\"56762204-a73b-4142-b720-4f774834cbc0\",\"reason\":\"Read timeout on endpoint URL: \\\"https://lambda.ca-central-1.amazo...[11478 chars cut]",
        "level": "ERROR"
      },
      {
        "@timestamp": "2026-10-01 02:52:34.836",
        "@message": "{\"level\":\"ERROR\",\"location\":\"handler:170\",\"message\":\"message failed\",\"timestamp\":\"2026-10-01 02:52:34,835+0000\",\"service\":\"fulfillment\",\"correlation_id\":\"load-7f01eada-256\",\"message_id\":\"2f28a998-2fb8-4269-a7ed-4608358f1987\",\"reason\":\"An error occurred (TooManyRequestsException) when calling the Inv...[2472 chars cut]",
        "level": "ERROR"
      },
      {
        "@timestamp": "2026-10-01 02:52:34.536",
        "@message": "{\"level\":\"ERROR\",\"location\":\"handler:170\",\"message\":\"message failed\",\"timestamp\":\"2026-10-01 02:52:34,535+0000\",\"service\":\"fulfillment\",\"correlation_id\":\"load-7f01eada-253\",\"message_id\":\"20b09e67-22e3-46bf-b2df-b3ab5ec17f30\",\"reason\":\"An error occurred (TooManyRequestsException) when calling the Inv...[2472 chars cut]",
        "level": "ERROR"
      },
      {
        "@timestamp": "2026-10-01 02:52:34.236",
        "@message": "{\"level\":\"ERROR\",\"location\":\"handler:170\",\"message\":\"message failed\",\"timestamp\":\"2026-10-01 02:52:34,235+0000\",\"service\":\"fulfillment\",\"correlation_id\":\"load-7f01eada-250\",\"message_id\":\"e0d36426-ed50-4385-ba93-f8743c36d349\",\"reason\":\"An error occurred (TooManyRequestsException) when calling the Inv...[2472 chars cut]",
        "level": "ERROR"
      },
      {
        "@timestamp": "2026-10-01 02:52:33.956",
        "@message": "{\"level\":\"ERROR\",\"location\":\"handler:170\",\"message\":\"message failed\",\"timestamp\":\"2026-10-01 02:52:33,955+0000\",\"service\":\"fulfillment\",\"correlation_id\":\"load-7f01eada-247\",\"message_id\":\"b5f931c2-6b0c-4fd9-aa8a-9f0613b1504f\",\"reason\":\"An error occurred (TooManyRequestsException) when calling the Inv...[2472 chars cut]",
        "level": "ERROR"
      },
      "...[15 more items cut]"
    ],
    "bytes_scanned": 531474,
    "scan_budget_left_bytes": 20440046
  }
}

Step 4+98 snote_hypotheses
hypotheses=likely: throttling of payments or downstream dependency causing payment failures during fulfillment ruled_out: bad_deploy (no recent deployments)
Result (31 characters)
```
{
  "ok": "2 hypotheses recorded"
}
```

Step 5+100 squery_logscited as evidence

minutes=5, service=fulfillment, query=fields @timestamp, reason | filter service = "fulfillment" and level = "ERROR" | stats count(*) by reason

Result (451 characters)

{
  "tool": "query_logs",
  "truncated": false,
  "untrusted_data": {
    "status": "Complete",
    "rows": [
      {
        "reason": "Read timeout on endpoint URL: \"https://lambda.ca-central-1.amazonaws.com/2015-03-31/functions/nightshift-payments/invocations\"",
        "count(*)": "28"
      },
      {
        "reason": "An error occurred (TooManyRequestsException) when calling the Invoke operation (reached max retries: 0): Rate Exceeded.",
        "count(*)": "57"
      }
    ],
    "bytes_scanned": 602740,
    "scan_budget_left_bytes": 19837306
  }
}

Step 6+100 sget_function_configcited as evidence

service=payments

Result (497 characters)

{
  "tool": "get_function_config",
  "truncated": false,
  "untrusted_data": {
    "function": "nightshift-payments",
    "live_alias_version": "15",
    "last_modified": "2026-10-01T02:51:01Z",
    "runtime": "python3.14",
    "memory_mb": 128,
    "timeout_seconds": 30,
    "reserved_concurrency": 2,
    "state": "Active",
    "code_sha256": "+nUjF4MPu416I6fZuzBEuZurITnjdNNZim3R0oXyxIA=",
    "environment": {
      "PAYMENT_ERROR_RATE": "0",
      "PAYMENT_LATENCY_JITTER_MS": "20",
      "PAYMENT_LATENCY_MS": "5000",
      "POWERTOOLS_LOG_LEVEL": "INFO",
      "POWERTOOLS_SERVICE_NAME": "payments"
    }
  }
}

Step 7+101 snote_hypotheses
hypotheses=likely: throttling (TooManyRequestsException) due to low reserved concurrency on payments service causing payment failures in fulfillment ruled_out: bad_deploy (no recent deployments)
Result (31 characters)
```
{
  "ok": "2 hypotheses recorded"
}
```
Step 8+102 sfinish_investigationanswer rejected, sent back
evidence_steps=5,6, confidence=95, root_cause_component=payments, fault_category=throttling, summary=Fulfillment experienced payment failures because calls to the payments service were throttled with TooManyRequestsException due to a low reserved concurrency limit (2) on the payments function., actions=[], hypotheses=likely: throttling (TooManyRequestsException) due to low reserved concurrency on payments service causing payment failures in fulfillment ruled_out: bad_deploy (no recent deployments)
Result (94 characters)
```
{
  "error": "finish_investigation rejected",
  "problems": [
    "'actions' must be string, got list"
  ]
}
```
Step 9+103 sfinish_investigation
actions=, summary=Fulfillment experienced payment failures because calls to the payments service were throttled with TooManyRequestsException due to a low reserved concurrency limit (2) on the payments function., fault_category=throttling, confidence=95, hypotheses=likely: throttling (TooManyRequestsException) due to low reserved concurrency on payments service causing payment failures in fulfillment ruled_out: bad_deploy (no recent deployments), root_cause_component=payments, evidence_steps=5,6
Result (30 characters)
```
{
  "ok": "investigation closed"
}
```

Postmortem, as the investigation wrote it

Postmortem: nightshift-payment-failures

Investigation ab85b48d0635, gemini gemini-3.5-flash-lite, started 2026-10-01T02:52:35+00:00.

Answer


Root cause component	`payments`
Fault category	`throttling`
Confidence	95
Ended because	finished

Summary

Fulfillment experienced payment failures because calls to the payments service were throttled with TooManyRequestsException due to a low reserved concurrency limit (2) on the payments function.

Impact

The page: nightshift-payment-failures was ALARM (since 2026-10-01T02:52:29Z). Reason recorded by CloudWatch: Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).

Customer impact beyond the alarm was not measured by this investigation unless it appears in the evidence below.

Timeline

2026-10-01T02:52:36+00:00 step 1: get_alarm
2026-10-01T02:52:37+00:00 step 2: list_recent_deployments minutes=30, service=fulfillment (found nothing)
2026-10-01T02:52:38+00:00 step 3: query_logs query=fields @timestamp, @message, level | filter level = "ERROR" | sort @timestamp desc, ...
2026-10-01T02:52:39+00:00 step 4: note_hypotheses hypotheses=likely: throttling of payments or downstream dependency causing payment failure...
2026-10-01T02:52:41+00:00 step 5: query_logs minutes=5, service=fulfillment, query=fields @timestamp, reason | filter service = "fulfil...
2026-10-01T02:52:41+00:00 step 6: get_function_config service=payments
2026-10-01T02:52:42+00:00 step 7: note_hypotheses hypotheses=likely: throttling (TooManyRequestsException) due to low reserved concurrency o...
2026-10-01T02:52:43+00:00 step 8: finish_investigation evidence_steps=5,6, confidence=95, root_cause_component=payments, fault_category=throttlin... (refused: 'actions' must be string, got list)
2026-10-01T02:52:44+00:00 step 9: finish_investigation actions=, summary=Fulfillment experienced payment failures because calls to the payments s...

Root cause evidence

Step 5, query_logs: {"status":"Complete","rows":[{"reason":"Read timeout on endpoint URL: "https://lambda.ca-central-1.amazonaws.com/2015-03-31/functions/nightshift-payments/invocations"","count(*)":"28"},{"reason":"An error occurred (TooManyRequestsExceptio...(older result, shortened)
Step 6, get_function_config: {"function":"nightshift-payments","live_alias_version":"15","last_modified":"2026-10-01T02:51:01Z","runtime":"python3.14","memory_mb":128,"timeout_seconds":30,"reserved_concurrency":2,"state":"Active","code_sha256":"+nUjF4MPu416I6fZuzBEuZur...(older result, shortened)

Proposed fix (for a human to decide; the agent changed nothing)

None proposed.

Hypotheses

likely: throttling (TooManyRequestsException) due to low reserved concurrency on payments service causing payment failures in fulfillment
ruled_out: bad_deploy (no recent deployments)

Dropped along the way:

throttling of payments or downstream dependency causing payment failures during fulfillment

What the investigation cost

5 model calls, 17,733 input and 508 output tokens (18,241 total)
9 steps, 8 s of wall clock
1,134,214 bytes of logs scanned
0 replies rejected by the provider for bad tool arguments

fulfillment / throttling, confidence 95. wrong

The fulfillment Lambda was throttled due to hitting its reserved concurrency limit of 2, causing a spike in payment failures. Recent changes to the payments service increased load, overwhelming the fulfillment service's capacity.

Model

ministral-14b-latest

Ended because

finished

Model calls, tokens

8, 37.9K

Logs scanned

768 KB

Hypotheses at the end

likely throttling in fulfillment service due to Lambda rate limits
ruled out timeout_regression in fulfillment service due to increased latency in payments service
ruled out slow_dependency on payments service

Journal

15 steps

Step 1+98 sget_alarm

name=nightshift-payment-failures

Result (561 characters)

{
  "tool": "get_alarm",
  "truncated": false,
  "untrusted_data": {
    "name": "nightshift-payment-failures",
    "state": "ALARM",
    "reason": "Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).",
    "since": "2026-10-01T02:52:29Z",
    "metric": {
      "namespace": "NightShift",
      "name": "PaymentFailures",
      "dimensions": {
        "service": "fulfillment"
      },
      "statistic": "Sum",
      "period_seconds": 60
    },
    "fires_when": "GreaterThanOrEqualToThreshold 3.0 for 1 period(s)",
    "recent_state_changes": [
      {
        "at": "2026-10-01T02:52:29Z",
        "summary": "Alarm updated from OK to ALARM"
      }
    ]
  }
}

Step 2+98 sget_metricstool returned an error
namespace=NightShift, metric=PaymentFailures, statistic=Sum, dimensions=service=fulfillment, minutes=60, period=60
Result (131 characters)
```
{
  "tool": "get_metrics",
  "truncated": false,
  "untrusted_data": {
    "error": "invalid arguments",
    "problems": [
      "'minutes' must be at most 30"
    ]
  }
}
```
Step 3+98 sget_metricstool returned an error
namespace=NightShift, metric=OrdersPaid, statistic=Sum, dimensions=service=fulfillment, minutes=60, period=60
Result (131 characters)
```
{
  "tool": "get_metrics",
  "truncated": false,
  "untrusted_data": {
    "error": "invalid arguments",
    "problems": [
      "'minutes' must be at most 30"
    ]
  }
}
```
Step 4+98 slist_recent_deploymentsskipped, more than 3 calls in one reply
service=fulfillment, minutes=60
Result (47 characters)
```
{
  "error": "skipped: at most 3 calls per reply"
}
```

Step 5+107 sget_metricscited as evidence

namespace=NightShift, metric=PaymentFailures, statistic=Sum, dimensions=service=fulfillment, minutes=30, period=60

Result (230 characters)

{
  "tool": "get_metrics",
  "truncated": false,
  "untrusted_data": {
    "metric": "NightShift PaymentFailures {'service': 'fulfillment'} Sum per 60s",
    "window_minutes": 30,
    "points": [
      [
        "02:51:00Z",
        47
      ]
    ],
    "summary": {
      "min": 47,
      "max": 47,
      "count": 1
    }
  }
}

Step 6+107 sget_metricscited as evidence

namespace=NightShift, metric=OrdersPaid, statistic=Sum, dimensions=service=fulfillment, minutes=30, period=60

Result (280 characters)

{
  "tool": "get_metrics",
  "truncated": false,
  "untrusted_data": {
    "metric": "NightShift OrdersPaid {'service': 'fulfillment'} Sum per 60s",
    "window_minutes": 30,
    "points": [
      [
        "02:48:00Z",
        49
      ],
      [
        "02:49:00Z",
        60
      ],
      [
        "02:50:00Z",
        60
      ],
      [
        "02:51:00Z",
        7
      ]
    ],
    "summary": {
      "min": 7,
      "max": 60,
      "count": 4
    }
  }
}

Step 7+108 squery_logstool returned an error

service=fulfillment, query=fields @timestamp, level, message, order_id, reason | filter level = "ERROR" and @timestamp > ago(30m), minutes=30, limit=50

Result (278 characters)

{
  "tool": "query_logs",
  "truncated": false,
  "untrusted_data": {
    "error": "AWS MalformedQueryException: Unrecognized function name: ago ([178,185]) (Service: AWSLogs; Status Code: 400; Error Code: MalformedQueryException; Request ID: e64451d3-5952-4e53-a6aa-4efa385987c4; Proxy: null)"
  }
}

Step 8+111 squery_logscited as evidence

service=fulfillment, query=fields @timestamp, level, message, order_id, reason | filter level = "ERROR" | sort @timestamp desc, minutes=30, limit=50

Result (1,476 characters)

{
  "tool": "query_logs",
  "truncated": true,
  "untrusted_data": {
    "status": "Complete",
    "rows": [
      {
        "@timestamp": "2026-10-01 02:52:48.846",
        "level": "ERROR",
        "message": "message failed",
        "reason": "An error occurred (TooManyRequestsException) when calling the Invoke operation (reached max retries: 0): Rate Exceeded."
      },
      {
        "@timestamp": "2026-10-01 02:52:48.546",
        "level": "ERROR",
        "message": "message failed",
        "reason": "An error occurred (TooManyRequestsException) when calling the Invoke operation (reached max retries: 0): Rate Exceeded."
      },
      {
        "@timestamp": "2026-10-01 02:52:48.266",
        "level": "ERROR",
        "message": "message failed",
        "reason": "An error occurred (TooManyRequestsException) when calling the Invoke operation (reached max retries: 0): Rate Exceeded."
      },
      {
        "@timestamp": "2026-10-01 02:52:47.966",
        "level": "ERROR",
        "message": "message failed",
        "reason": "An error occurred (TooManyRequestsException) when calling the Invoke operation (reached max retries: 0): Rate Exceeded."
      },
      {
        "@timestamp": "2026-10-01 02:52:47.592",
        "level": "ERROR",
        "message": "message failed",
        "reason": "Read timeout on endpoint URL: \"https://lambda.ca-central-1.amazonaws.com/2015-03-31/functions/nightshift-payments/invocations\""
      },
      {
        "@timestamp": "2026-10-01 02:52:44.313",
        "level": "ERROR",
        "message": "message failed",
        "reason": "Read timeout on endpoint URL: \"https://lambda.ca-central-1.amazonaws.com/2015-03-31/functions/nightshift-payments/invocations\""
      },
      "...[44 more items cut]"
    ],
    "bytes_scanned": 786147,
    "scan_budget_left_bytes": 20185373
  }
}

Step 9+113 snote_hypotheses
hypotheses=likely: throttling in fulfillment service due to Lambda rate limits possible: timeout_regression in fulfillment service due to increased latency in payments service possible: slow_dependency on payments service
Result (31 characters)
```
{
  "ok": "3 hypotheses recorded"
}
```
Step 10+118 sget_function_config
service=fulfillment
The logs in **Step 8** show repeated `TooManyRequestsException` errors when the `fulfillment` service attempts to invoke the `nightshift-payments` Lambda function. This strongly supports the **throttling** hypothesis, as the errors are explicitly due to rate limits being exceeded. Additionally, the `OrdersPaid` metric (**Step 6**) shows a sharp drop at **02:51:00Z**, coinciding with the spike in `PaymentFailures` (**Step 5**). This aligns with the throttling hypothesis, as the `fulfillment` service is unable to process payments successfully due to Lambda rate limits. ### Next Steps To confirm the root cause and rule out other hypotheses, I will: 1. Check the **Lambda configuration** for the `fulfillment` service to verify its concurrency limits and recent changes. 2. Investigate **X-Ray traces** for the `fulfillment` service to confirm throttling and latency patterns. This will help determine whether the issue is due to: - **Throttling** (most likely, based on current evidence). - *
Result (672 characters)
```
{
  "tool": "get_function_config",
  "truncated": false,
  "untrusted_data": {
    "function": "nightshift-fulfillment",
    "live_alias_version": "7",
    "last_modified": "more than 30 minutes ago",
    "runtime": "python3.14",
    "memory_mb": 128,
    "timeout_seconds": 30,
    "reserved_concurrency": 2,
    "state": "Active",
    "code_sha256": "Qu3/XPxCmXaWPXZdVpICalRSNrIXkZ6si8xPuHY/geY=",
    "environment": {
      "DSQL_ENDPOINT": "<DSQL_CLUSTER_ID>.dsql.ca-central-1.on.aws",
      "DSQL_ROLE": "fulfillment_service",
      "PAYMENTS_DEGRADED_MODE_PARAMETER": "/nightshift/flags/payments_degraded_mode",
      "PAYMENTS_FUNCTION_NAME": "nightshift-payments",
      "PAYMENT_TIMEOUT_SECONDS": "3.0",
      "POWERTOOLS_LOG_LEVEL": "INFO",
      "POWERTOOLS_SERVICE_NAME": "fulfillment"
    }
  }
}
```

Step 11+119 sget_traces

service=fulfillment, minutes=30

Result (615 characters)

{
  "tool": "get_traces",
  "truncated": false,
  "untrusted_data": {
    "service": "nightshift-fulfillment",
    "note": "active tracing samples about 1 request/s plus 5%, so counts are samples",
    "traces": 74,
    "with_error": 0,
    "with_fault": 0,
    "with_throttle": 0,
    "duration_seconds": {
      "p50": 1.138,
      "p99": 13.538,
      "max": 13.553
    },
    "slowest": [
      {
        "id": "1-6abdcae7-17f333ec0746da7817fb6d87",
        "seconds": 13.553
      },
      {
        "id": "1-6abdcaed-e86531624766eb2596e79835",
        "seconds": 13.538
      },
      {
        "id": "1-6abdcaba-028ecdb45cdd8878962c62b0",
        "seconds": 12.089
      },
      {
        "id": "1-6abdcac6-1d1249b14c4cac8274bb3f0a",
        "seconds": 11.808
      },
      {
        "id": "1-6abdcad0-fb4ae8a298bb78633b1c02a4",
        "seconds": 11.803
      }
    ]
  }
}

Step 12+126 sget_metricscited as evidence
namespace=AWS/Lambda, metric=ConcurrentExecutions, statistic=Maximum, dimensions=FunctionName=nightshift-fulfillment, minutes=30, period=60
The evidence from **Step 10** and **Step 11** clarifies the situation: 1. **Lambda Configuration (Step 10)**: - The `fulfillment` Lambda has a **reserved concurrency of 2**, which is extremely low for a production service handling payments. This likely contributes to throttling when demand spikes. 2. **X-Ray Traces (Step 11)**: - There are **no recorded throttling errors** in the traces, but this could be due to sampling or the throttling occurring before the trace was captured. - The **high p99 duration (13.5s)** suggests latency issues, but the **absence of explicit throttling errors** in traces weakens the throttling hypothesis for this window. - The **logs (Step 8)** explicitly show `TooManyRequestsException`, which is a direct indicator of throttling. 3. **Re-evaluating Hypotheses**: - The **throttling hypothesis** is still the most plausible cause, as the logs explicitly show `TooManyRequestsException`. The absence of throttling errors in X-Ray traces may be due
Result (324 characters)
```
{
  "tool": "get_metrics",
  "truncated": false,
  "untrusted_data": {
    "metric": "AWS/Lambda ConcurrentExecutions {'FunctionName': 'nightshift-fulfillment'} Maximum per 60s",
    "window_minutes": 30,
    "points": [
      [
        "02:48:00Z",
        2
      ],
      [
        "02:49:00Z",
        2
      ],
      [
        "02:50:00Z",
        2
      ],
      [
        "02:51:00Z",
        2
      ],
      [
        "02:52:00Z",
        2
      ]
    ],
    "summary": {
      "min": 2,
      "max": 2,
      "count": 5
    }
  }
}
```

Step 13+126 slookup_recent_changescited as evidence

minutes=30

Result (2,356 characters)

{
  "tool": "lookup_recent_changes",
  "truncated": false,
  "untrusted_data": {
    "window_minutes": 30,
    "note": "CloudTrail delivers events about 5 minutes after they happen",
    "changes": [
      {
        "at": "2026-10-01T02:51:15Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-payments",
        "resources": [
          "/aws/lambda/nightshift-payments"
        ]
      },
      {
        "at": "2026-10-01T02:51:09Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-payments",
        "resources": [
          "/aws/lambda/nightshift-payments"
        ]
      },
      {
        "at": "2026-10-01T02:51:03Z",
        "event": "lambda:UpdateAlias20150331",
        "by": "youssef-admin",
        "resources": [
          "arn:aws:lambda:ca-central-1:<ACCOUNT_ID>:function:nightshift-payments:live"
        ]
      },
      {
        "at": "2026-10-01T02:51:01Z",
        "event": "lambda:UpdateFunctionConfiguration20150331v2",
        "by": "youssef-admin",
        "resources": [
          "nightshift-payments"
        ]
      },
      {
        "at": "2026-10-01T02:48:24Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-payments",
        "resources": [
          "/aws/lambda/nightshift-payments"
        ]
      },
      {
        "at": "2026-10-01T02:48:22Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-fulfillment",
        "resources": [
          "/aws/lambda/nightshift-fulfillment"
        ]
      },
      {
        "at": "2026-10-01T02:48:20Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-fulfillment",
        "resources": [
          "/aws/lambda/nightshift-fulfillment"
        ]
      },
      {
        "at": "2026-10-01T02:48:14Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-cart",
        "resources": [
          "/aws/lambda/nightshift-cart"
        ]
      },
      {
        "at": "2026-10-01T02:48:14Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-cart",
        "resources": [
          "/aws/lambda/nightshift-cart"
        ]
      },
      {
        "at": "2026-10-01T02:48:11Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-orders",
        "resources": [
          "/aws/lambda/nightshift-orders"
        ]
      },
      {
        "at": "2026-10-01T02:48:10Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-orders",
        "resources": [
          "/aws/lambda/nightshift-orders"
        ]
      },
      {
        "at": "2026-10-01T02:48:09Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-orders",
        "resources": [
          "/aws/lambda/nightshift-orders"
        ]
      },
      {
        "at": "2026-10-01T02:48:08Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-cart",
        "resources": [
          "/aws/lambda/nightshift-cart"
        ]
      },
      {
        "at": "2026-10-01T02:48:08Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-orders",
        "resources": [
          "/aws/lambda/nightshift-orders"
        ]
      },
      {
        "at": "2026-10-01T02:48:06Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-cart",
        "resources": [
          "/aws/lambda/nightshift-cart"
        ]
      },
      {
        "at": "2026-10-01T02:48:06Z",
        "event": "logs:CreateLogStream",
        "by": "nightshift-orders",
        "resources": [
          "/aws/lambda/nightshift-orders"
        ]
      }
    ]
  }
}

Step 14+137 sfinish_investigationanswer rejected, sent back
root_cause_component=fulfillment, fault_category=throttling, confidence=95, summary=The fulfillment Lambda was throttled due to hitting its reserved concurrency limit of 2, causing a spike in payment failures. Recent changes to the payments service increased load, overwhelming the fulfillment service's capacity., evidence_steps=5,6,8,12,13, hypotheses=likely: throttling in fulfillment service due to Lambda rate limits ruled_out: timeout_regression in fulfillment service due to increased latency in payments service ruled_out: slow_dependency on payments service, actions=rollback_alias service=fulfillment set_operational_flag name=checkout_rate_limit value=v, proposed_actions=Increase reserved concurrency for fulfillment Lambda to handle higher load.
The evidence now provides a clear picture: ### Key Findings: 1. **Lambda Concurrency (Step 12)**: - The `fulfillment` Lambda is consistently hitting its **reserved concurrency limit of 2** during the alarm period. This confirms that throttling is occurring due to insufficient concurrency capacity. 2. **Recent Changes (Step 13)**: - At **02:51:03Z**, there was a **Lambda alias update (`UpdateAlias20150331`)** and a **function configuration update (`UpdateFunctionConfiguration20150331v2`)** for the `nightshift-payments` service. - This aligns with the **spike in `PaymentFailures` at 02:51:00Z** and the drop in `OrdersPaid`. The changes to the `payments` service likely caused increased latency or failures, overwhelming the `fulfillment` service's limited concurrency. 3. **Logs (Step 8)**: - The `TooManyRequestsException` errors explicitly confirm that the `fulfillment` Lambda is being throttled due to hitting its concurrency limit. ### Root Cause: The **throttling** in the
Result (172 characters)
```
{
  "error": "finish_investigation rejected",
  "problems": [
    "action 'set_operational_flag name=checkout_rate_limit value=v': 'v' is not a valid value for checkout_rate_limit"
  ]
}
```
Step 15+140 sfinish_investigation
root_cause_component=fulfillment, fault_category=throttling, confidence=95, summary=The fulfillment Lambda was throttled due to hitting its reserved concurrency limit of 2, causing a spike in payment failures. Recent changes to the payments service increased load, overwhelming the fulfillment service's capacity., evidence_steps=5,6,8,12,13, hypotheses=likely: throttling in fulfillment service due to Lambda rate limits ruled_out: timeout_regression in fulfillment service due to increased latency in payments service ruled_out: slow_dependency on payments service, actions=rollback_alias service=fulfillment, proposed_actions=Increase reserved concurrency for fulfillment Lambda to handle higher load.
Result (30 characters)
```
{
  "ok": "investigation closed"
}
```

Postmortem, as the investigation wrote it

Postmortem: nightshift-payment-failures

Investigation 73ab23232d19, mistral ministral-14b-latest, started 2026-10-01T02:52:35+00:00.

Answer


Root cause component	`fulfillment`
Fault category	`throttling`
Confidence	95
Ended because	finished

Summary

Impact

Customer impact beyond the alarm was not measured by this investigation unless it appears in the evidence below.

Timeline

2026-10-01T02:52:39+00:00 step 1: get_alarm name=nightshift-payment-failures
2026-10-01T02:52:39+00:00 step 2: get_metrics namespace=NightShift, metric=PaymentFailures, statistic=Sum, dimensions=service=fulfillmen... (failed)
2026-10-01T02:52:39+00:00 step 3: get_metrics namespace=NightShift, metric=OrdersPaid, statistic=Sum, dimensions=service=fulfillment, mi... (failed)
2026-10-01T02:52:39+00:00 step 4: list_recent_deployments service=fulfillment, minutes=60 (skipped)
2026-10-01T02:52:48+00:00 step 5: get_metrics namespace=NightShift, metric=PaymentFailures, statistic=Sum, dimensions=service=fulfillmen...
2026-10-01T02:52:48+00:00 step 6: get_metrics namespace=NightShift, metric=OrdersPaid, statistic=Sum, dimensions=service=fulfillment, mi...
2026-10-01T02:52:49+00:00 step 7: query_logs service=fulfillment, query=fields @timestamp, level, message, order_id, reason | filter le... (failed)
2026-10-01T02:52:52+00:00 step 8: query_logs service=fulfillment, query=fields @timestamp, level, message, order_id, reason | filter le...
2026-10-01T02:52:54+00:00 step 9: note_hypotheses hypotheses=likely: throttling in fulfillment service due to Lambda rate limits possible: t...
2026-10-01T02:52:59+00:00 step 10: get_function_config service=fulfillment
2026-10-01T02:53:00+00:00 step 11: get_traces service=fulfillment, minutes=30
2026-10-01T02:53:07+00:00 step 12: get_metrics namespace=AWS/Lambda, metric=ConcurrentExecutions, statistic=Maximum, dimensions=FunctionN...
2026-10-01T02:53:07+00:00 step 13: lookup_recent_changes minutes=30
2026-10-01T02:53:18+00:00 step 14: finish_investigation root_cause_component=fulfillment, fault_category=throttling, confidence=95, summary=The fu... (refused: action 'set_operational_flag name=checkout_rate_limit value=v': 'v' is not a valid value for checkout_rate_limit)
2026-10-01T02:53:21+00:00 step 15: finish_investigation root_cause_component=fulfillment, fault_category=throttling, confidence=95, summary=The fu...

Root cause evidence

Step 5, get_metrics: {"metric":"NightShift PaymentFailures {'service': 'fulfillment'} Sum per 60s","window_minutes":30,"points":[["02:51:00Z",47.0]],"summary":{"min":47.0,"max":47.0,"count":1}}
Step 6, get_metrics: {"metric":"NightShift OrdersPaid {'service': 'fulfillment'} Sum per 60s","window_minutes":30,"points":[["02:48:00Z",49.0],["02:49:00Z",60.0],["02:50:00Z",60.0],["02:51:00Z",7.0]],"summary":{"min":7.0,"max":60.0,"count":4}}
Step 8, query_logs: {"status":"Complete","rows":[{"@timestamp":"2026-10-01 02:52:48.846","level":"ERROR","message":"message failed","reason":"An error occurred (TooManyRequestsException) when calling the Invoke operation (reached max retries: 0): Rate Exceeded...(older result, shortened)
Step 12, get_metrics: {"metric":"AWS/Lambda ConcurrentExecutions {'FunctionName': 'nightshift-fulfillment'} Maximum per 60s","window_minutes":30,"points":[["02:48:00Z",2.0],["02:49:00Z",2.0],["02:50:00Z",2.0],["02:51:00Z",2.0],["02:52:00Z",2.0]],"summary":{"min"...(older result, shortened)
Step 13, lookup_recent_changes: {"window_minutes":30,"note":"CloudTrail delivers events about 5 minutes after they happen","changes":[{"at":"2026-10-01T02:51:15Z","event":"logs:CreateLogStream","by":"nightshift-payments","resources":["/aws/lambda/nightshift-payments"]},{"...(older result, shortened)

Proposed fix (for a human to decide; the agent changed nothing)

Allowlisted actions, each waiting for owner approval:

rollback_alias service=fulfillment
Increase reserved concurrency for fulfillment Lambda to handle higher load.

Hypotheses

likely: throttling in fulfillment service due to Lambda rate limits
ruled_out: timeout_regression in fulfillment service due to increased latency in payments service
ruled_out: slow_dependency on payments service

What the investigation cost

8 model calls, 35,798 input and 2,123 output tokens (37,921 total)
15 steps, 45 s of wall clock
786,147 bytes of logs scanned
0 replies rejected by the provider for bad tool arguments

payments / insufficient evidence, confidence 50. hedged

An alarm 'nightshift-payment-failures' fired for the fulfillment service due to high payment failures (47 failures vs threshold of 3). However, given only the alarm metadata and no tools or logs, there is insufficient evidence to definitively determine the root cause or fault category.

Model

gemini-3.5-flash-lite

Ended because

finished

Model calls, tokens

2, 3.1K

Logs scanned

0 KB

Hypotheses at the end

ruled out bad_deploy
ruled out config_regression
ruled out timeout_regression
ruled out slow_dependency
ruled out poison_message
ruled out iam_regression
ruled out hot_row_contention
ruled out missing_index
ruled out throttling
ruled out retry_storm
ruled out no_fault
possible insufficient_evidence

Journal

3 steps

Step 1+95 sget_alarmfrom the pagecited as evidence

name=payment-failures

Result (561 characters)

{
  "tool": "get_alarm",
  "truncated": false,
  "untrusted_data": {
    "name": "nightshift-payment-failures",
    "state": "ALARM",
    "reason": "Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).",
    "since": "2026-10-01T02:52:29Z",
    "metric": {
      "namespace": "NightShift",
      "name": "PaymentFailures",
      "dimensions": {
        "service": "fulfillment"
      },
      "statistic": "Sum",
      "period_seconds": 60
    },
    "fires_when": "GreaterThanOrEqualToThreshold 3.0 for 1 period(s)",
    "recent_state_changes": [
      {
        "at": "2026-10-01T02:52:29Z",
        "summary": "Alarm updated from OK to ALARM"
      }
    ]
  }
}

Step 2+96 sfinish_investigationanswer rejected, sent back
evidence_steps=1, fault_category=insufficient_evidence, hypotheses=ruled_out: bad_deploy ruled_out: config_regression ruled_out: timeout_regression ruled_out: slow_dependency ruled_out: poison_message ruled_out: iam_regression ruled_out: hot_row_contention ruled_out: missing_index ruled_out: throttling ruled_out: retry_storm ruled_out: no_fault possible: insufficient_evidence, confidence=50, proposed_actions=Investigate payments and fulfillment service logs to determine the cause of payment failures., actions=[], root_cause_component=payments, summary=An alarm 'nightshift-payment-failures' fired for the fulfillment service due to high payment failures (47 failures vs threshold of 3). However, given only the alarm metadata and no tools or logs, there is insufficient evidence to definitively determine the root cause or fault category.
Result (94 characters)
```
{
  "error": "finish_investigation rejected",
  "problems": [
    "'actions' must be string, got list"
  ]
}
```
Step 3+97 sfinish_investigation
actions=, hypotheses=ruled_out: bad_deploy ruled_out: config_regression ruled_out: timeout_regression ruled_out: slow_dependency ruled_out: poison_message ruled_out: iam_regression ruled_out: hot_row_contention ruled_out: missing_index ruled_out: throttling ruled_out: retry_storm ruled_out: no_fault possible: insufficient_evidence, evidence_steps=1, summary=An alarm 'nightshift-payment-failures' fired for the fulfillment service due to high payment failures (47 failures vs threshold of 3). However, given only the alarm metadata and no tools or logs, there is insufficient evidence to definitively determine the root cause or fault category., fault_category=insufficient_evidence, root_cause_component=payments, proposed_actions=Investigate payments and fulfillment service logs to determine the cause of payment failures., confidence=50
Result (30 characters)
```
{
  "ok": "investigation closed"
}
```

Postmortem, as the investigation wrote it

Postmortem: nightshift-payment-failures

Investigation 40db58bd1964, gemini gemini-3.5-flash-lite, started 2026-10-01T02:52:35+00:00.

Answer


Root cause component	`payments`
Fault category	`insufficient_evidence`
Confidence	50
Ended because	finished

Summary

Impact

Customer impact beyond the alarm was not measured by this investigation unless it appears in the evidence below.

Timeline

2026-10-01T02:52:36+00:00 step 1: get_alarm name=payment-failures
2026-10-01T02:52:37+00:00 step 2: finish_investigation evidence_steps=1, fault_category=insufficient_evidence, hypotheses=ruled_out: bad_deploy r... (refused: 'actions' must be string, got list)
2026-10-01T02:52:38+00:00 step 3: finish_investigation actions=, hypotheses=ruled_out: bad_deploy ruled_out: config_regression ruled_out: timeout...

Root cause evidence

Step 1, get_alarm: {"name":"nightshift-payment-failures","state":"ALARM","reason":"Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).","since":"2026-10-01T02:52:29Z","metric":{"namespace":"NightShift","...(older result, shortened)

Proposed fix (for a human to decide; the agent changed nothing)

Investigate payments and fulfillment service logs to determine the cause of payment failures.

Hypotheses

ruled_out: bad_deploy
ruled_out: config_regression
ruled_out: timeout_regression
ruled_out: slow_dependency
ruled_out: poison_message
ruled_out: iam_regression
ruled_out: hot_row_contention
ruled_out: missing_index
ruled_out: throttling
ruled_out: retry_storm
ruled_out: no_fault
possible: insufficient_evidence

What the investigation cost

2 model calls, 2,645 input and 468 output tokens (3,113 total)
3 steps, 3 s of wall clock
0 bytes of logs scanned
0 replies rejected by the provider for bad tool arguments

fulfillment / insufficient evidence, confidence 60. hedged

The alarm indicates a sudden spike in payment failures within the fulfillment service, but no additional details (e.g., logs, error types, or dependencies) are provided to determine the root cause. The spike could be due to a variety of issues, such as a service degradation, configuration error, or external dependency failure.

Model

ministral-14b-latest

Ended because

finished

Model calls, tokens

1, 1.5K

Logs scanned

0 KB

Hypotheses at the end

likely The spike in payment failures is due to an issue within the fulfillment service or its dependencies.
possible A bad deploy or config regression in fulfillment caused the failures.
possible A slow dependency (e.g., payments service) is causing timeouts or failures in fulfillment.
possible A retry storm or throttling issue is overwhelming the fulfillment service.
possible An IAM regression or permission issue is blocking fulfillment operations.
ruled out No evidence of poison_message or hot_row_contention without additional data.
ruled out No evidence of missing_index or timeout_regression without query or latency details.

Journal

2 steps

Step 1+95 sget_alarmfrom the pagecited as evidence

name=payment-failures

Result (561 characters)

{
  "tool": "get_alarm",
  "truncated": false,
  "untrusted_data": {
    "name": "nightshift-payment-failures",
    "state": "ALARM",
    "reason": "Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).",
    "since": "2026-10-01T02:52:29Z",
    "metric": {
      "namespace": "NightShift",
      "name": "PaymentFailures",
      "dimensions": {
        "service": "fulfillment"
      },
      "statistic": "Sum",
      "period_seconds": 60
    },
    "fires_when": "GreaterThanOrEqualToThreshold 3.0 for 1 period(s)",
    "recent_state_changes": [
      {
        "at": "2026-10-01T02:52:29Z",
        "summary": "Alarm updated from OK to ALARM"
      }
    ]
  }
}

Step 2+100 sfinish_investigation
root_cause_component=fulfillment, fault_category=insufficient_evidence, confidence=60, summary=The alarm indicates a sudden spike in payment failures within the fulfillment service, but no additional details (e.g., logs, error types, or dependencies) are provided to determine the root cause. The spike could be due to a variety of issues, such as a service degradation, configuration error, or external dependency failure., evidence_steps=1, hypotheses=likely: The spike in payment failures is due to an issue within the fulfillment service or its dependencies. possible: A bad deploy or config regression in fulfillment caused the failures. possible: A slow dependency (e.g., payments service) is causing timeouts or failures in fulfillment. possible: A retry storm or throttling issue is overwhelming the fulfillment service. possible: An IAM regression or permission issue is blocking fulfillment operations. ruled_out: No evidence of poison_message or hot_row_contention without additional data. ruled_out: No evidence of missing_index or timeout_regression without query or latency details., actions=, proposed_actions=1. Check fulfillment service logs for errors or failures during the alarm period. 2. Verify if the payments service or other dependencies are experiencing issues. 3. Review recent deployments or configuration changes in fulfillment. 4. Monitor for retry patterns or throttling in the fulfillment service. 5. Investigate IAM permissions for fulfillment-related operations.
Result (30 characters)
```
{
  "ok": "investigation closed"
}
```

Postmortem, as the investigation wrote it

Postmortem: nightshift-payment-failures

Investigation 0ee6e20fb75b, mistral ministral-14b-latest, started 2026-10-01T02:52:35+00:00.

Answer


Root cause component	`fulfillment`
Fault category	`insufficient_evidence`
Confidence	60
Ended because	finished

Summary

Impact

Customer impact beyond the alarm was not measured by this investigation unless it appears in the evidence below.

Timeline

2026-10-01T02:52:36+00:00 step 1: get_alarm name=payment-failures
2026-10-01T02:52:41+00:00 step 2: finish_investigation root_cause_component=fulfillment, fault_category=insufficient_evidence, confidence=60, sum...

Root cause evidence

Step 1, get_alarm: {"name":"nightshift-payment-failures","state":"ALARM","reason":"Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).","since":"2026-10-01T02:52:29Z","metric":{"namespace":"NightShift","...(older result, shortened)

Proposed fix (for a human to decide; the agent changed nothing)

1. Check fulfillment service logs for errors or failures during the alarm period.
1. Verify if the payments service or other dependencies are experiencing issues.
1. Review recent deployments or configuration changes in fulfillment.
1. Monitor for retry patterns or throttling in the fulfillment service.
1. Investigate IAM permissions for fulfillment-related operations.

Hypotheses

likely: The spike in payment failures is due to an issue within the fulfillment service or its dependencies.
possible: A bad deploy or config regression in fulfillment caused the failures.
possible: A slow dependency (e.g., payments service) is causing timeouts or failures in fulfillment.
possible: A retry storm or throttling issue is overwhelming the fulfillment service.
possible: An IAM regression or permission issue is blocking fulfillment operations.
ruled_out: No evidence of poison_message or hot_row_contention without additional data.
ruled_out: No evidence of missing_index or timeout_regression without query or latency details.

What the investigation cost

1 model calls, 1,192 input and 328 output tokens (1,520 total)
2 steps, 5 s of wall clock
0 bytes of logs scanned
0 replies rejected by the provider for bad tool arguments

payments / slow dependency, confidence 70. right

The payment provider is failing. Defer payments until it recovers.

Model

scripted

Ended because

finished

Model calls, tokens

0, 0

Logs scanned

0 KB

Hypotheses at the end

likely The payment provider is failing. Defer payments until it recovers.

Journal

2 steps

Step 1+95 sget_alarmcited as evidence

name=payment-failures

Result (561 characters)

{
  "tool": "get_alarm",
  "truncated": false,
  "untrusted_data": {
    "name": "nightshift-payment-failures",
    "state": "ALARM",
    "reason": "Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).",
    "since": "2026-10-01T02:52:29Z",
    "metric": {
      "namespace": "NightShift",
      "name": "PaymentFailures",
      "dimensions": {
        "service": "fulfillment"
      },
      "statistic": "Sum",
      "period_seconds": 60
    },
    "fires_when": "GreaterThanOrEqualToThreshold 3.0 for 1 period(s)",
    "recent_state_changes": [
      {
        "at": "2026-10-01T02:52:29Z",
        "summary": "Alarm updated from OK to ALARM"
      }
    ]
  }
}

Step 2+95 slist_recent_deploymentsfound nothing

minutes=30, service=payments

Result (102 characters)

{
  "tool": "list_recent_deployments",
  "truncated": false,
  "untrusted_data": {
    "window_minutes": 30,
    "moves": []
  }
}

Postmortem, as the investigation wrote it

Postmortem: nightshift-payment-failures

Investigation 8f89b767d032, runbook scripted, started 2026-10-01T02:52:35+00:00.

Answer


Root cause component	`payments`
Fault category	`slow_dependency`
Confidence	70
Ended because	finished

Summary

The payment provider is failing. Defer payments until it recovers.

Impact

Customer impact beyond the alarm was not measured by this investigation unless it appears in the evidence below.

Timeline

2026-10-01T02:52:36+00:00 step 1: get_alarm name=payment-failures
2026-10-01T02:52:36+00:00 step 2: list_recent_deployments minutes=30, service=payments (found nothing)

Root cause evidence

Step 1, get_alarm: {"name":"nightshift-payment-failures","state":"ALARM","reason":"Threshold Crossed: 1 datapoint [47.0 (01/10/26 02:51:00)] was greater than or equal to the threshold (3.0).","since":"2026-10-01T02:52:29Z","metric":{"namespace":"NightShift","...(older result, shortened)

Proposed fix (for a human to decide; the agent changed nothing)

Allowlisted actions, each waiting for owner approval:

set_operational_flag name=payments_degraded_mode value=true

Hypotheses

likely: The payment provider is failing. Defer payments until it recovers.

What the investigation cost

0 model calls, 0 input and 0 output tokens (0 total)
2 steps, 0 s of wall clock
0 bytes of logs scanned
0 replies rejected by the provider for bad tool arguments