Investigate infrastructure alerts and prepare fixes

Why use this

1. An operator responding to an infrastructure alert may see log symptoms, recent deployments and configuration changes that overlap in time. Choosing the first plausible cause can produce a repair that hides the alert without resolving the underlying problem.

2. A source-timed investigation plan could separate observations, hypotheses and proposed changes. It would keep code or infrastructure remediation within established review boundaries and make missing rollback evidence visible before action.

Why an agent / simpler alternative

Useful judgment

Correlate supplied alert/log/deployment context and identify bounded tests of competing explanations.

Simpler alternative

Follow a maintained incident runbook when the alert has a known, verified response.

Unsuitable when

The system is safety-critical or action authority and incident ownership are unclear.

Proposed inputs

1. Name

   Incident evidence bundle

   Owner

   Operator

   Minimum scope

   Relevant alert, log excerpts and deployment timeline

   Quality check

   Check timestamps, environment and redaction of secrets/customer data.

2. Name

   Change and review boundaries

   Owner

   Maintainer

   Minimum scope

   Protected-branch rules, allowed diagnostic scope and rollback expectations

   Quality check

   Identify who approves material infrastructure actions.

Access and setup — proposed or unknown

Proposed minimum

1. Read-only supplied evidence and an offline investigation/change proposal.

Compatibility unknowns

1. Unknown: exact runtime, monitoring access, environment state and repository controls.

External actions requiring approval

1. Changing infrastructure, running disruptive diagnostics, pushing code or altering security settings.

Expected deliverable and review checks

Proposed artifact

Incident hypothesis table and proposed scoped remediation with review and rollback checkpoints.

Critical checks

1. Causal claims remain hypotheses until supported by appropriate evidence.

2. No protected-branch or operator-approval boundary is bypassed.

Missing output evidence

No new workflow run or output inspection was performed for this overlay.

Failure signals and proposed responses

1. Signal

   Logs and deployment events use different clocks or time zones.

   Why it matters

   The apparent sequence could misidentify the triggering change.

   Proposed response

   Normalize documented timestamps and retain unresolved timing uncertainty.

2. Signal

   A proposed fix removes the alert condition without checking service behavior.

   Why it matters

   Monitoring could become quieter while the fault remains.

   Proposed response

   Require a service-level verification plan before accepting remediation.

Effort and cost — unknown

Setup work

1. Establish incident scope and trustworthy timeline evidence.

Ongoing review

1. Review proposed changes and actual recovery evidence separately.

Unknowns

1. Unknown: root cause, diagnostic cost and recovery time.

First check — proposed, unexecuted

Status

proposed_unexecuted

Synthetic fixture

Invented incident notes contain conflicting timestamp zones and a proposal to disable the noisy alert.

Acceptance checks

1. Timing remains unresolved until reconciled.

2. Alert suppression is not labelled a service fix.

Stop conditions

1. Live diagnostics, configuration changes or public pushes require approval.

Limits

1. Editorial incident planning; a synthetic evidence review is not root-cause or runtime validation.