Capture your first test error with Sentry and verify it appears in the dashboard.

MITAuto-check passed

Install Sentry Hello World

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill sentry-hello-world -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace sentry-hello-world --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/sentry-hello-world .claude/skills/sentry-hello-world && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
sentry-hello-world
GitHub stars
2.8k
Token cost
~3.5k tokens
SKILL.md length
657 words
Files
4 (incl. references)
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Capture your first test error with Sentry and verify it appears in the dashboard.

  • Works in 6 steps: Verify the SDK Is Active → Capture a Test Message → Capture a Test Exception → …
  • Testing a new Sentry integration
  • SKILL.md covers Overview, Prerequisites, Instructions and Examples, plus 4 more sections
  • Calls node, python and curl; reaches sentry.io

What it does

Sentry Hello World is an agent skill from jeremylongshore/tons-of-skills-marketplace. Capture your first test error with Sentry and verify it appears in the dashboard. Use when testing a new Sentry integration, verifying error capture works after install-auth, or learning how to enrich events with user context, tags, and breadcrumbs. Trigger with phrases like "test sentry", "sentry hello world", "verify sentry", "first sentry error", "sentry capture test".

Its SKILL.md is about 3.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `references/errors.md`, `references/examples.md` and `references/implementation.md`). Compatibility notes: Designed for Claude Code

It works with Sentry, TypeScript, Python and Node.js. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • Testing a new Sentry integration
  • Verifying error capture works after install-auth
  • Learning how to enrich events with user context
  • With phrases like test sentry

Example prompts

  • “test sentry”
  • “sentry hello world”
  • “verify sentry”
  • “/sentry-hello-world”

Requirements

  • Python 3
  • Node.js
  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(node:*), Bash(python:*), Bash(npm:*), Grep

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Verify the SDK Is Active
  2. Capture a Test Message
  3. Capture a Test Exception
  4. Add User Context and Tags
  5. Add Breadcrumbs
  6. Verify in the Sentry Dashboard

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Bash(node:*)
    • Bash(python:*)
    • Bash(npm:*)
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • node
    • python
    • curl

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • sentry.io

    Also links to:

    • docs.sentry.io

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Sentry Hello World loads about 3.5k tokens when it runs, and up to ~4.1k if it reads all its reference files. Until then it costs about 98 tokens; SKILL.md has 657 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~98
When it runs · the whole SKILL.md, loaded when a task matches
~3.5k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~4.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 657 words, ~3,479 tokens.

Download SKILL.mdSave it as .claude/skills/sentry-hello-world/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
sentry-hello-world
description
Capture your first test error with Sentry and verify it appears in the dashboard. Use when testing a new Sentry integration, verifying error capture works after install-auth, or learning how to enrich events with user context, tags, and breadcrumbs. Trigger with phrases like "test sentry", "sentry hello world", "verify sentry", "first sentry error", "sentry capture test".
allowed-tools
Read, Write, Edit, Bash(node:*), Bash(python:*), Bash(npm:*), Grep
compatibility
Designed for Claude Code
version
1.51.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
saas, sentry, testing, dashboard, quickstart

Sentry Hello World

Overview

Send your first test events to Sentry — a captured message, a captured exception, and a fully-enriched error with user context, tags, and breadcrumbs — then verify each one appears in the Sentry dashboard. This skill covers both Node.js (@sentry/node) and Python (sentry-sdk).

Prerequisites

  • Completed sentry-install-auth setup (SDK installed, DSN configured)
  • Valid SENTRY_DSN in environment variables
  • instrument.mjs loaded before app code (Node.js) or sentry_sdk.init() called (Python)
  • Network access to *.ingest.sentry.io

Instructions

Step 1 — Verify the SDK Is Active

Before sending test events, confirm the SDK initialized correctly. If getClient() returns undefined, the SDK was never initialized — go back to sentry-install-auth.

TypeScript (Node.js):

typescript
import * as Sentry from '@sentry/node';

const client = Sentry.getClient();
if (!client) {
  console.error('Sentry SDK not initialized. Ensure instrument.mjs is loaded first.');
  console.error('Run with: node --import ./instrument.mjs your-script.mjs');
  process.exit(1);
}
console.log('Sentry SDK active — DSN configured');

Python:

python
import sentry_sdk

client = sentry_sdk.Hub.current.client
if client is None or client.dsn is None:
    print("Sentry SDK not initialized. Call sentry_sdk.init() first.")
    exit(1)
print("Sentry SDK active — DSN configured")
Step 2 — Capture a Test Message

captureMessage sends an informational event without a stack trace. Use it to verify basic connectivity between your app and Sentry.

TypeScript:

typescript
import * as Sentry from '@sentry/node';

// captureMessage returns the event ID (a 32-char hex string)
const eventId = Sentry.captureMessage('Hello Sentry! SDK verification test.', 'info');
console.log(`Message sent — Event ID: ${eventId}`);

// Also test 'warning' level — appears with yellow indicator in dashboard
Sentry.captureMessage('Warning-level test message', 'warning');

// IMPORTANT: flush before process exits or events may be lost
await Sentry.flush(2000);

Python:

python
import sentry_sdk

event_id = sentry_sdk.capture_message("Hello Sentry! SDK verification test.", level="info")
print(f"Message sent — Event ID: {event_id}")

sentry_sdk.capture_message("Warning-level test message", level="warning")

# Flush to ensure delivery before process exits
sentry_sdk.flush()
Step 3 — Capture a Test Exception

captureException sends a full error with stack trace. Always pass an actual Error object (not a string) so Sentry generates a proper stack trace.

TypeScript:

typescript
import * as Sentry from '@sentry/node';

try {
  throw new Error('Hello Sentry! This is a test exception.');
} catch (error) {
  const eventId = Sentry.captureException(error);
  console.log(`Exception sent — Event ID: ${eventId}`);
}

await Sentry.flush(2000);

Python:

python
import sentry_sdk

try:
    raise ValueError("Hello Sentry! This is a test exception.")
except Exception as e:
    event_id = sentry_sdk.capture_exception(e)
    print(f"Exception sent — Event ID: {event_id}")

sentry_sdk.flush()
Step 4 — Add User Context and Tags

Enrich events with identity and metadata so you can filter and search in the dashboard. setUser attaches to all subsequent events in the current scope. setTag creates indexed, searchable key-value pairs.

TypeScript:

typescript
import * as Sentry from '@sentry/node';

// Attach user identity — appears in the "User" section of every event
Sentry.setUser({
  id: 'test-user-001',
  email: 'dev@example.com',
  username: 'developer',
});

// Tags are indexed and searchable — use for filtering in Issues view
Sentry.setTag('test_run', 'hello-world');
Sentry.setTag('team', 'platform');

// setContext adds structured data (not indexed, but visible in event detail)
Sentry.setContext('test_metadata', {
  ran_at: new Date().toISOString(),
  node_version: process.version,
  purpose: 'SDK verification',
});

// This event will carry user, tags, and context
Sentry.captureMessage('Test event with full context attached', 'info');

await Sentry.flush(2000);

Python:

python
import sentry_sdk
from datetime import datetime, timezone
import sys

sentry_sdk.set_user({"id": "test-user-001", "email": "dev@example.com", "username": "developer"})

sentry_sdk.set_tag("test_run", "hello-world")
sentry_sdk.set_tag("team", "platform")

sentry_sdk.set_context("test_metadata", {
    "ran_at": datetime.now(timezone.utc).isoformat(),
    "python_version": sys.version,
    "purpose": "SDK verification",
})

sentry_sdk.capture_message("Test event with full context attached", level="info")

sentry_sdk.flush()
Step 5 — Add Breadcrumbs

Breadcrumbs record a trail of events leading up to an error. They appear in the event detail view, giving you the chronological context of what happened before the crash.

TypeScript:

typescript
import * as Sentry from '@sentry/node';

Sentry.addBreadcrumb({
  category: 'auth',
  message: 'User authenticated successfully',
  level: 'info',
});

Sentry.addBreadcrumb({
  category: 'http',
  message: 'GET /api/users returned 200',
  level: 'info',
  data: { status_code: 200, url: '/api/users', method: 'GET' },
});

Sentry.addBreadcrumb({
  category: 'ui',
  message: 'User clicked "Submit Order" button',
  level: 'info',
});

// This exception will carry all three breadcrumbs above
try {
  throw new Error('Order processing failed — breadcrumb trail attached');
} catch (error) {
  Sentry.captureException(error);
}

await Sentry.flush(2000);

Python:

python
import sentry_sdk

sentry_sdk.add_breadcrumb(category="auth", message="User authenticated successfully", level="info")
sentry_sdk.add_breadcrumb(category="http", message="GET /api/users returned 200", level="info",
                          data={"status_code": 200, "url": "/api/users"})
sentry_sdk.add_breadcrumb(category="ui", message="User clicked Submit Order button", level="info")

try:
    raise RuntimeError("Order processing failed — breadcrumb trail attached")
except Exception as e:
    sentry_sdk.capture_exception(e)

sentry_sdk.flush()
Step 6 — Verify in the Sentry Dashboard
  1. Open https://sentry.io and select your project
  2. Navigate to the Issues tab — test errors appear as grouped issues
  3. Click an issue to inspect the event detail:
    • Stack Trace — file path, line number, and surrounding code context
    • User section — id, email, username from setUser()
    • Tags sidebar — test_run: hello-world, team: platform
    • Breadcrumbs tab — chronological trail of events before the error
    • Additional Data — custom context from setContext()
  4. Use the search bar to filter: test_run:hello-world narrows to your test events
  5. Confirm Environment matches your SENTRY_ENVIRONMENT value
  6. Confirm Release matches your SENTRY_RELEASE value (if set)
  7. Delete test issues when done: select issues > Resolve or Delete

Examples

Complete Verification Script (TypeScript)

Save as test-sentry.mjs and run with node --import ./instrument.mjs test-sentry.mjs to exercise all capabilities at once.

typescript
// Run with: node --import ./instrument.mjs test-sentry.mjs
import * as Sentry from '@sentry/node';

async function main() {
  console.log('--- Sentry Hello World Verification ---\n');

  // 1. Verify SDK
  const client = Sentry.getClient();
  if (!client) {
    console.error('ERROR: Sentry SDK not initialized.');
    console.error('Run with: node --import ./instrument.mjs test-sentry.mjs');
    process.exit(1);
  }
  console.log('[OK] Sentry SDK active');

  // 2. Set user context and tags
  Sentry.setUser({ id: 'test-001', email: 'dev@example.com', username: 'developer' });
  Sentry.setTag('test_run', 'hello-world');
  Sentry.setTag('environment', process.env.SENTRY_ENVIRONMENT || 'test');
  console.log('[OK] User context and tags set');

  // 3. Capture a message
  const msgId = Sentry.captureMessage('Hello Sentry — SDK verification', 'info');
  console.log(`[OK] Message captured — Event ID: ${msgId}`);

  // 4. Capture an exception with breadcrumbs
  Sentry.addBreadcrumb({ category: 'test', message: 'Starting verification script', level: 'info' });
  Sentry.addBreadcrumb({ category: 'test', message: 'About to throw test error', level: 'warning' });

  try {
    throw new Error('Hello Sentry! Verification test exception.');
  } catch (error) {
    const errId = Sentry.captureException(error);
    console.log(`[OK] Exception captured — Event ID: ${errId}`);
  }

  // 5. Flush and report
  await Sentry.flush(5000);
  console.log('\n[DONE] All events flushed — check your Sentry dashboard at https://sentry.io');
  console.log('Navigate to Issues tab, filter by tag: test_run:hello-world');
}

main();
Complete Verification Script (Python)

Save as test_sentry.py and run with python test_sentry.py (after calling sentry_sdk.init() in your setup).

python
# Run with: python test_sentry.py (after sentry_sdk.init() in your setup)
import sentry_sdk
import os
import sys

def main():
    print("--- Sentry Hello World Verification ---\n")

    # 1. Verify SDK
    client = sentry_sdk.Hub.current.client
    if client is None or client.dsn is None:
        print("ERROR: Sentry SDK not initialized.")
        print("Ensure sentry_sdk.init(dsn=...) is called before this script.")
        sys.exit(1)
    print("[OK] Sentry SDK active")

    # 2. Set user context and tags
    sentry_sdk.set_user({"id": "test-001", "email": "dev@example.com", "username": "developer"})
    sentry_sdk.set_tag("test_run", "hello-world")
    sentry_sdk.set_tag("environment", os.environ.get("SENTRY_ENVIRONMENT", "test"))
    print("[OK] User context and tags set")

    # 3. Capture a message
    msg_id = sentry_sdk.capture_message("Hello Sentry — SDK verification", level="info")
    print(f"[OK] Message captured — Event ID: {msg_id}")

    # 4. Capture an exception with breadcrumbs
    sentry_sdk.add_breadcrumb(category="test", message="Starting verification script", level="info")
    sentry_sdk.add_breadcrumb(category="test", message="About to throw test error", level="warning")

    try:
        raise ValueError("Hello Sentry! Verification test exception.")
    except Exception as e:
        err_id = sentry_sdk.capture_exception(e)
        print(f"[OK] Exception captured — Event ID: {err_id}")

    # 5. Flush and report
    sentry_sdk.flush()
    print("\n[DONE] All events flushed — check your Sentry dashboard at https://sentry.io")
    print("Navigate to Issues tab, filter by tag: test_run:hello-world")

if __name__ == "__main__":
    main()
Show full SKILL.md (265 more words)Show less

Output

  • Test message visible in Sentry dashboard Issues tab within 30 seconds
  • Test exception visible with full stack trace pointing to correct file and line
  • User context (id, email, username) attached to every event
  • Tags (test_run, team) searchable in the Issues sidebar filter
  • Breadcrumb trail visible in event detail, showing events leading up to the error
  • Custom context visible under "Additional Data" in event detail
  • Event IDs printed to console for cross-referencing with dashboard

Error Handling

ErrorCauseSolution
Event not appearing in dashboardDSN misconfigured or env var not loadedRun echo $SENTRY_DSN to verify; re-copy from Project Settings > Client Keys
getClient() returns undefinedSDK not initialized before test code runsUse node --import ./instrument.mjs flag or import instrument at top of entry
Missing stack trace on exceptionError captured as string instead of Error objectAlways pass new Error('...') to captureException, never a bare string
No user context on eventsetUser() called after captureException()Call setUser() before any capture calls
Events delayed > 60 secondsNetwork or proxy blocking *.ingest.sentry.ioCheck firewall rules; test with curl https://sentry.io/api/0/
Sentry Logger [warn]: Too many requestsRate limited by Sentry ingestLower tracesSampleRate in init; check quota at Settings > Subscription
flush() times outLarge event queue or slow networkIncrease timeout: Sentry.flush(10000); check network latency
Breadcrumbs not appearingMax breadcrumbs exceeded (default 100)Configure maxBreadcrumbs in Sentry.init() or clear with Sentry.getCurrentScope().clearBreadcrumbs()

Resources

Next Steps

Proceed to sentry-error-capture for production error-handling patterns with scope isolation, custom fingerprinting, and error grouping strategies.

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files (references) in skills/.curated/sentry-hello-world of jeremylongshore/tons-of-skills-marketplace.

  • SKILL.md
  • references/errors.md
  • references/examples.md
  • references/implementation.md

Open the folder on GitHubat commit cfae287

Compare with similar skills

Sentry Hello World next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Sentry Hello World compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sentry Hello World this skilljeremylongshore/tons-of-skills-marketplace2.8k—~3.5kAutomated safety check: PassMIT
Node Backend Development Guidelinesdiet103/claude-code-infrastructure-showcase10k2 repos~2kAutomated safety check: PassMIT
Dbgtheodo-group/debug-that158—~2.5kAutomated safety check: PassMIT
Brightdata SDK JSbrightdata/skills264—~3kAutomated safety check: PassMIT
Full Stack ScaffoldDokhacgiakhoa/Agent-Skills-4-Vibe-Coding-CLI508—~548Automated safety check: PassCustom licence
Copilot SDKintellectronica/agent-skills295—~3.2kAutomated safety check: PassCC0-1.0

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Questions about Sentry Hello World

What does Sentry Hello World do?

Capture your first test error with Sentry and verify it appears in the dashboard. Sentry Hello World is an agent skill from jeremylongshore/tons-of-skills-marketplace. Capture your first test error with Sentry and verify it appears in the dashboard.

When should I use Sentry Hello World?

Sentry Hello World fits situations like: testing a new Sentry integration; verifying error capture works after install-auth; learning how to enrich events with user context; with phrases like test sentry.

How do I install Sentry Hello World in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill sentry-hello-world -a claude-code`. Or copy the skill folder (skills/.curated/sentry-hello-world in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/sentry-hello-world in your project. Claude Code loads it when a task matches its description.

How do I install Sentry Hello World in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill sentry-hello-world -a codex`. Or copy the skill folder (skills/.curated/sentry-hello-world in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/sentry-hello-world in your project. Codex loads it when a task matches its description.

Can I use Sentry Hello World in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill sentry-hello-world -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/sentry-hello-world, .gemini/skills/sentry-hello-world, .github/skills/sentry-hello-world and .opencode/skills/sentry-hello-world in your project.

What does Sentry Hello World need to run?

Going by SKILL.md and its folder, Sentry Hello World needs the command-line tools its instructions call (node, python and curl). Our summary lists: Python 3; Node.js. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(node:*), Bash(python:*), Bash(npm:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Sentry Hello World access the network?

SKILL.md names 2 domains. In commands or code: sentry.io; the agent is likely to contact it when it follows the instructions. As links in the text: docs.sentry.io. This is read from the text; nothing was executed.

Is Sentry Hello World safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Sentry Hello World use?

Sentry Hello World is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Sentry Hello World use?

About 3.5k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 643 tokens, read only when the agent opens those files.

What are the alternatives to Sentry Hello World?

Skills that share tags, products or a category with Sentry Hello World: Node Backend Development Guidelines (diet103/claude-code-infrastructure-showcase, 10k stars), Dbg (theodo-group/debug-that, 158 stars), Brightdata SDK JS (brightdata/skills, 264 stars) and Full Stack Scaffold (Dokhacgiakhoa/Agent-Skills-4-Vibe-Coding-CLI, 508 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sentry Hello World?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.