A setup guide for Sentry, a service that records application errors and performance problems. It covers FastAPI, NestJS, Express, Next.js, React Native, and Flutter apps.

Use it when adding Sentry to an existing app. It helps install and configure the correct software package, scrub private data, upload source maps in continuous integration, and track releases.

It helps developers add error tracking without overlooking privacy settings, release information, source maps, or sensible data-sampling choices.

How arunanksharan/claude-forge configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to arunanksharan/claude-forge. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/arunanksharan/claude-forge/main/.claude/skills/wire-sentry/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/arunanksharan/claude-forge

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/arunanksharan/claude-forge/wire-sentry.svg)](https://agentmods.dev/skills/arunanksharan/claude-forge/wire-sentry)

Your own site

<a href="https://agentmods.dev/skills/arunanksharan/claude-forge/wire-sentry"><img src="https://agentmods.dev/badge/skills/arunanksharan/claude-forge/wire-sentry.svg" alt="Measured on agentmods" height="20"></a>

Per session 84 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 599 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.

Model	Per session	Once invoked
Fable 5.1	$0.00084	$0.00599
Opus 5	$0.00042	$0.00300
Sonnet 5	$0.00017	$0.00120
Haiku 4.5	$0.00008	$0.00060

Measured 8d ago against content hash c85653662cfc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

wire-sentry 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 8d 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.

.claude/skills/wire-sentry/SKILL.md · 32 lines

What it actually says

Wire Up Sentry (claudeforge)

Follow observability/03-sentry.md. Steps:

Identify the stack: which app(s) — FastAPI / NestJS / Express / Next.js / RN / Flutter?
Confirm with user: do they have a Sentry account + project + DSN? If not, ask them to create one and share the DSN.
Install the SDK for the target framework — see the relevant section of 03-sentry.md:
- Python (FastAPI): sentry-sdk[fastapi] + setup_sentry() in startup
- Node (Nest/Express): @sentry/node + @sentry/profiling-node, import-first pattern
- Next.js: @sentry/nextjs via pnpx @sentry/wizard -i nextjs
- React Native: @sentry/react-native via pnpx @sentry/wizard -i reactNative
- Flutter: sentry_flutter package + SentryFlutter.init
Configure the SDK:
- dsn, environment, release (set via env)
- Sample rates: tracesSampleRate: 0.1, profilesSampleRate: 0.1 (start low, tune up if needed)
- sendDefaultPii: false + a before_send / beforeSend scrubber for password/token/api_key fields
- Integrations relevant to the framework (FastAPI, SQLAlchemy, Redis, Celery, etc.)
Set up source maps (web/RN frameworks):
- In CI, after build: npx @sentry/cli sourcemaps upload --release "{{slug}}@{{git-sha}}" ./dist
Set up release tracking:
- Set SENTRY_RELEASE env var to {{slug}}@{{git-sha}}
- Confirm releases appear in Sentry UI
Configure alerts in Sentry UI: route critical errors to Slack/PagerDuty.
Trigger a test error to verify end-to-end: sentry_sdk.capture_message("test") or throw a test exception.

Don't crank tracesSampleRate to 1.0 in production — bill shock. Always scrub PII before sending.

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.

8d ago First seen · 32 lines · 84 tokens per session scan A c85653662cfc

Subscribe to this mod's changes

wire-sentry is a skill published in the GitHub repository arunanksharan/claude-forge (2 stars, last pushed 4mo ago), licensed Unlicense. It adds 84 tokens to every session and 599 once invoked, about $0.0004 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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claude-forge: Skill for Claude Code