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Build an Incident Agent That Learns From Confirmed Fixes

Aashik’s On-Call Copilot prototype shows how an incident agent can search project history, ask for missing context and retain engineer-confirmed fixes without treating a memory hit as proof.
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An incident agent becomes useful across on-call rotations when it can recall what actually resolved a similar failure—not merely repeat an earlier guess. Aashik’s On-Call Copilot prototype combines alert inspection, bounded tool use, project-specific memory and engineer-confirmed outcomes to support that workflow. The design is a practical blueprint, not a demonstrated production system: its author reports no measured accuracy or operational-impact results.

What the agent is meant to remember

A conventional assistant may recognize a symptom but lack the operational history of the affected service. On-Call Copilot is organized around a more specific question: has this project seen the failure before, and what fixed it?

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The durable record is the resolution an engineer supplies or confirms, rather than only the agent’s initial hypothesis. The prototype also records whether a prior recommendation was helpful. That distinction matters: a plausible suggestion is not the same thing as a verified fix.

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How an incident moves through the prototype

  1. Submit an alert. The engineer provides the alert, which the agent can inspect and turn into structured facts.
  2. Look for relevant history. The agent can search the active project’s private memory for similar incidents, fixes, owners or feedback. If enabled, it can separately search a shared collection of anonymized, generic lessons.
  3. Clarify incomplete reports. When an alert lacks useful context, the agent can ask the engineer a question and suggest safe initial checks instead of asserting a root cause.
  4. Return a diagnosis and actions. A model-driven loop selects from the available tools, subject to a maximum step count.
  5. Record the outcome. Once the incident is resolved, the engineer-supplied resolution can be retained for future recall, along with feedback on an earlier recommendation.

The four tools described are inspect_alert, recall_project_memory, recall_shared_lessons and ask_engineer_question. Their names and returned results preserve the distinction between project history and shared lessons; a cross-project lesson is not presented as an incident that happened in the active project.

Keep private history separate from shared lessons

The described design gives each project a private memory bank and maintains a separate bank for shared, generic lessons. An engineer reviews a proposed shared lesson before it is retained. After edits, the implementation redacts project and service identifiers again.

Those steps create a privacy boundary, but they do not establish that disclosure risk is eliminated. Anonymization can still leave sensitive or identifying context in a lesson. Teams adopting this pattern should decide what may be shared, review the actual text, and treat the shared collection as a different source of evidence from the project’s own incident history.

What a recalled fix can—and cannot—tell you

The article illustrates the idea with a search-api alert involving 502 responses and a database connection-pool timeout. In the example, a prior resolution staggered a scheduled reindex and increased connection-pool capacity, after which the 502 rate returned to normal. This is a scenario in the article, not a measured production result or evidence that the same remedy will work elsewhere.

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Aashik’s key warning is concise: “A memory hit is not proof.” A past incident can help prioritize investigation, but the present alert still needs diagnosis. Services change, symptoms can have multiple causes, and an old fix may be inappropriate or risky under current conditions.

For an implementation, the important question is not simply whether the agent found a similar record. Check whether the record is a confirmed outcome, which project or shared scope it came from, and whether prior feedback says the recommendation helped. The prototype describes those distinctions but does not publish a quantified evaluation of recall quality or decision accuracy.

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What the implementation demonstrates

Aashik describes On-Call Copilot as a Streamlit interface around an OnCallCopilot class, with Hindsight providing persistent memory and a Groq client shown in the model tool-calling loop. This is the author’s implementation account, not independent validation of reliability or production readiness.

The project suggests useful design questions for anyone building an incident assistant:

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  • Is each memory private to one project, or can it cross project boundaries?
  • Are confirmed outcomes stored separately from hypotheses and recommendations?
  • Can engineers record that a suggestion was unhelpful?
  • Can shared lessons be distinguished from events in the current service?
  • Are tool calls bounded, and can the agent request clarification rather than force a diagnosis?

The article does not report benchmarks, accuracy rates, response-time improvements or a measured reduction in incident duration. Its contribution is the workflow and memory-boundary design, not evidence that the prototype improves operational metrics.

Source: Aashik, “How I Built an Incident Agent That Remembers Fixes With Hindsight,” DEV Community, September 28, 2026.

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