incident-triage

incident-triage is a skill for Claude Code from rpraharaj/forward-deployed-engineer. It costs 105 tokens per session (2,209 once invoked), scanned A, original, MIT.

A method for finding the cause of a production incident—a live-system failure or degradation—by tracing errors through code, logs, metrics, services, and recent changes.

In plain words
What is it for?
Use when production is broken, customers report errors, alerts fire, or a batch job fails or produces incorrect results.
Why use it?
It helps restore service quickly while keeping immediate mitigation separate from the later search for the underlying cause.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the fde-core plugin — 30 skills shipped together

Good fit Use when production is broken, customers report errors, alerts fire, or a batch job fails or produces incorrect results.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rpraharaj/forward-deployed-engineer/incident-triage
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add rpraharaj/forward-deployed-engineer --skill incident-triage
Clone the repo
git clone --depth 1 https://github.com/rpraharaj/forward-deployed-engineer

Made for: Claude Code.

Or install fde-core, the plugin that ships this one along with the rest of its 30 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for incident-triage

README.md
[![agentmods](https://agentmods.dev/badge/skills/rpraharaj/forward-deployed-engineer/incident-triage/github.svg)](https://agentmods.dev/skills/rpraharaj/forward-deployed-engineer/incident-triage)
Your own site
<a href="https://agentmods.dev/skills/rpraharaj/forward-deployed-engineer/incident-triage"><img src="https://agentmods.dev/badge/skills/rpraharaj/forward-deployed-engineer/incident-triage/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for incident-triage

Your own site · 80×15
<a href="https://agentmods.dev/skills/rpraharaj/forward-deployed-engineer/incident-triage"><img src="https://agentmods.dev/badge/skills/rpraharaj/forward-deployed-engineer/incident-triage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,209 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00105 $0.02209
Opus 5 $0.00053 $0.01104
Sonnet 5 $0.00021 $0.00442
Haiku 4.5 $0.00011 $0.00221

Measured 10d ago against content hash 559ea88f6fa5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

incident-triage scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

fde-core/skills/incident-triage/SKILL.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Incident triage

Finding the cause fast, in a system you don't know.

Why this exists

An FDE gets pulled into incidents on systems they've known for days. That's genuinely harder than it is for the permanent team — you don't know what normal looks like, where the logs are, or which of the four services named payments-* is involved.

But you have two real advantages, and they're worth naming. You have no assumptions about where the problem is, which is exactly the bias that keeps experienced engineers looking in the wrong place for an hour. And you're comfortable saying "I don't know this system, walk me through it" — which under pressure, when everyone else is performing competence, is often what unblocks the room.

The main discipline: mitigation and diagnosis are different jobs. Doing them in the wrong order, or blurring them, extends outages. Stop the bleeding first, understand it after, and be explicit about which you're doing at any moment.

When this applies

  • Production is broken, degraded, or alerting
  • Customers are reporting errors
  • A batch job failed or produced wrong output
  • The start of a rescue engagement — usually the first task

When it doesn't

  • A bug found in development — that's ordinary debugging, no urgency framing needed
  • A performance concern that is not an active incident — measure it with nfr-validation if NFRs exist, otherwise ordinary debugging. Do not page this skill for "it has been getting slower."
  • Post-incident improvement work — that's observability-gap (fde-operate)

Prerequisites

None — incidents don't wait for artifacts. Where they exist, 02-system-map.md and any traces are valuable. Where they don't, this skill degrades to careful work with a stranger's system, which is the normal FDE condition anyway.

Procedure

1. Establish impact before cause

The first question is never "why." It's what is broken, for whom, since when, and is it getting worse.

  • What's the observable symptom?
  • Which users, how many, which regions or tenants?
  • When did it start? Be precise — this is the single most useful fact you'll get.
  • Is it ongoing, intermittent, or resolved?
  • Is it worsening?

Read the full file on GitHub · 190 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 190 lines · 105 tokens per session scan A 559ea88f6fa5

Subscribe to this mod's changes

incident-triage is a skill published in the GitHub repository rpraharaj/forward-deployed-engineer (6 stars, last pushed 23d ago), licensed MIT. It adds 105 tokens to every session and 2,209 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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