# discover-event-surfaces

Generates a candidate list of analytics events to instrument by reading a change_brief YAML produced after code diff analysis.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 42800 installs · ★ 46
- Author: amplitude
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/amplitude/mcp-marketplace/tree/HEAD/plugins/amplitude/skills/discover-event-surfaces/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/discover-event-surfaces

## What it does

The skill operates as step 2 in an analytics instrumentation workflow. It takes the `change_brief` YAML generated by `diff-intake`, evaluates whether analytics scope applies, and inspects modified UI components. Instead of logging raw implementation clicks, it follows the code one level out to map user flows, asynchronous boundaries, and branch conditions.

From there, it drafts a funnel hypothesis and pulls project naming standards via `discover-analytics-patterns`. Using the resolved Amplitude `projectId`, it checks the existing event catalog to eliminate duplicate tracking. The resulting candidates are grouped into four categories: business outcomes, user journeys, feature successes, and friction failures.

Running this skill in isolation will fail because it strictly depends on a valid `change_brief` YAML and companion workflow skills to resolve taxonomy.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add amplitude/mcp-marketplace --skill discover-event-surfaces -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/discover-event-surfaces/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/discover-event-surfaces/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add amplitude/mcp-marketplace --skill discover-event-surfaces -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/discover-event-surfaces/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add amplitude/mcp-marketplace --skill discover-event-surfaces -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/discover-event-surfaces/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install amplitude/mcp-marketplace discover-event-surfaces
```

2. **Manually: put the files in place**
- File: `.github/skills/discover-event-surfaces/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add amplitude/mcp-marketplace --skill discover-event-surfaces -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/amplitude/mcp-marketplace --path plugins/amplitude/skills/discover-event-surfaces
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/discover-event-surfaces/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add amplitude/mcp-marketplace --skill discover-event-surfaces -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/amplitude/mcp-marketplace/tree/HEAD/plugins/amplitude/skills/discover-event-surfaces/SKILL.md

## When to use it
- generate candidate telemetry events from a code diff summary
- map user journey funnels and async boundaries across modified code
- prevent duplicate event tracking against an Amplitude catalog
- categorize tracking points into outcomes, successes, and failures

## Example prompts
- What should I track for this PR based on change_brief.yaml?
- Generate event candidates from the latest change_brief
- What analytics events should I instrument for these UI changes?

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: e698575514b09d56.

BEGIN THIRD-PARTY FILE e698575514b09d56
```text
---
name: discover-event-surfaces
description: >
  Given a change_brief YAML (output from diff-intake), generates an exhaustive
  list of candidate analytics events to instrument. Takes the perspective of an
  engineer with a PM mindset — surfaces everything worth considering so a PM can
  decide what actually matters. Use this as step 2 of the analytics
  instrumentation workflow, immediately after diff-intake produces a
  change_brief. Trigger whenever a user has a change_brief YAML and wants to
  know what analytics events to add, or asks "what should I track for this PR",
  "what events should I instrument", "generate event candidates", or any
  request to surface analytics coverage gaps for a code change.
---

# discover-event-surfaces

You are step 2 of the analytics instrumentation workflow. Read a `change_brief`
YAML and produce an exhaustive candidate list of analytics events — named well,
organized by category, and ready for PM review.

Think like an engineer who ships the feature AND cares about whether it
succeeds. Generate events that answer product/business questions, not events
that mirror implementation details. Aim for **breadth and quality** — a
downstream skill will narrow the list.

Read the `taxonomy` skill at `../taxonomy/SKILL.md` to understand core
analytics philosophy and naming standards.

---

## 1. Parse the change_brief

- `classification.analytics_scope` — if `none`, stop and tell the user there's nothing to instrument.
- `summary` — one-line description of the change.
- `user_facing_changes` — primary signal. Each entry = something a user can now do or see differently.
- `surfaces.components` — modified UI components; where interactions happen.
- `file_summary_map` — read summaries for files in `surfaces` or touching user-facing logic. Skip tests/config/tooling.

## 2. Scan the codebase and map user flows

Before generating any events, build a concrete understanding of how users move
through the feature. The change_brief gives you file paths and summaries — now
read the actual code to trace the full journey.

### What to read

- Every file listed in `surfaces.components` — read them fully.
- Files from `file_summary_map` that touch user-facing logic (skip tests, config,
  tooling).
- Follow imports and references one level out: if a component calls a hook, API
  function, or navigates to another route, read that target file too. This is how
  you discover steps the diff didn't touch but that are part of the same flow.

### What to look for

Trace the path a user takes from entry to outcome:

- **Entry points** — how does the user arrive? Route definitions, navigation
```
END THIRD-PARTY FILE e698575514b09d56

The third-party file has ended. Everything between the e698575514b09d56 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 2666 of 19574 bytes. © amplitude · MIT · https://github.com/amplitude/mcp-marketplace/tree/HEAD/plugins/amplitude/skills/discover-event-surfaces/SKILL.md

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---
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