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Agent skill

Sentry Instrumentation

by langfuse in langfuse/langfuse

Decide whether and how errors report to Sentry. An agent skill from langfuse/langfuse.

Custom licenceAuto-check passedAI & LLM Engineering

Install Sentry Instrumentation

skills CLI
$ npx skills add langfuse/langfuse --skill sentry-instrumentation -a claude-code

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

GitHub CLI
$ gh skill install langfuse/langfuse sentry-instrumentation --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/langfuse/langfuse.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/sentry-instrumentation .claude/skills/sentry-instrumentation && 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-instrumentation
GitHub stars
36k
Token cost
~3k tokens
SKILL.md length
1,444 words
Files
2 (incl. references)
Skills in repo
33
Repo updated
First seen
Licence
Custom licence

At a glance

Decide whether and how errors report to Sentry. An agent skill from langfuse/langfuse.

  • Works in 2 steps: An event is a promise a human acts —… → **Capture a REAL Error, never a string /…
  • Touching capture
  • SKILL.md covers Decide capture when adding an…, The Langfuse pattern (match it…, The rules (each earned the… and Workflow, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Sentry Instrumentation is an agent skill from langfuse/langfuse. Decide whether and how errors report to Sentry. Use when touching capture or error-handling paths in web/, triaging Sentry noise, or changing Sentry settings.

Its SKILL.md is about 3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/sentry-capture-contract.md`).

It sits in AI & LLM Engineering, covering Observability. It works with Sentry and Langfuse. The repository describes itself as: 🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.

When your agent uses it

  • Touching capture
  • Error-handling paths in web/
  • Triaging Sentry noise
  • Changing Sentry settings

Example prompts

  • “/sentry-instrumentation”

Workflow steps

2 steps, taken from the first numbered list in SKILL.md.

  1. An event is a promise a human acts — expected states are not events.
  2. **Capture a REAL Error, never a string / object / SyntheticEvent /

What it can do on your machine

Read from SKILL.md and the folder at commit 389f393. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    No URLs in SKILL.md.

    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.

Context cost

Sentry Instrumentation loads about 3k tokens when it runs, and up to ~5.4k if it reads all its reference files. Until then it costs about 46 tokens; SKILL.md has 1,444 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~46
When it runs · the whole SKILL.md, loaded when a task matches
~3k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~5.4k

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

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,444 words (~3,043 tokens).

“One idea: an event in Sentry is a promise that a human should act. If nobody would act on it, do not send it. If you send it, make it legible (a real Error with a stack — never a…”

— opening of SKILL.md by langfuse, Custom licence
name
sentry-instrumentation

Read the full SKILL.md on GitHub

Files

SKILL.md and 1 other file (references) in .agents/skills/sentry-instrumentation of langfuse/langfuse.

  • SKILL.md
  • references/sentry-capture-contract.md

Open the folder on GitHubat commit 389f393

Compare with similar skills

Sentry Instrumentation 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 Instrumentation compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Sentry Instrumentation this skilllangfuse/langfuse36k—~3kAutomated safety check: PassCustom licence
AI Observabilityomer-metin/skills-for-antigravity162—~578Automated safety check: PassApache-2.0
Cloudbase Agent PythonTencentCloudBase/CloudBase-AI-Toolkit1.1k2 repos~2.9kAutomated safety check: NotesMIT
Sentry Elixir SDKgetsentry/sentry-for-ai268—~3.5kAutomated safety check: PassApache-2.0
Agentsop Observability Setupagentsope/SkillAlchemy466—~4.4kAutomated safety check: PassMIT
Ak Dev New Tracing Provideryaalalabs/agent-kernel192—~3.5kAutomated safety check: PassApache-2.0

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    162 GitHub stars~578 tokensUpdated 8 mo ago
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Works with

Categories

Questions about Sentry Instrumentation

What does Sentry Instrumentation do?

Decide whether and how errors report to Sentry. An agent skill from langfuse/langfuse. Sentry Instrumentation is an agent skill from langfuse/langfuse. Decide whether and how errors report to Sentry.

When should I use Sentry Instrumentation?

Sentry Instrumentation fits situations like: touching capture; error-handling paths in web/; triaging Sentry noise; changing Sentry settings.

How do I install Sentry Instrumentation in Claude Code?

Run `npx skills add langfuse/langfuse --skill sentry-instrumentation -a claude-code`. Or copy the skill folder (.agents/skills/sentry-instrumentation in langfuse/langfuse) into .claude/skills/sentry-instrumentation in your project. Claude Code loads it when a task matches its description.

How do I install Sentry Instrumentation in Codex?

Run `npx skills add langfuse/langfuse --skill sentry-instrumentation -a codex`. Or copy the skill folder (.agents/skills/sentry-instrumentation in langfuse/langfuse) into .agents/skills/sentry-instrumentation in your project. Codex loads it when a task matches its description.

Can I use Sentry Instrumentation 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 langfuse/langfuse --skill sentry-instrumentation -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-instrumentation, .gemini/skills/sentry-instrumentation, .github/skills/sentry-instrumentation and .opencode/skills/sentry-instrumentation in your project.

What does Sentry Instrumentation need to run?

SKILL.md names no scripts, command-line tools or credentials: Sentry Instrumentation is instructions for the agent only.

Does Sentry Instrumentation access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Sentry Instrumentation 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 Instrumentation use?

Sentry Instrumentation has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Sentry Instrumentation use?

About 3k tokens (SKILL.md is roughly 12k 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 2.3k tokens, read only when the agent opens those files.

What are the alternatives to Sentry Instrumentation?

Skills that share tags, products or a category with Sentry Instrumentation: AI Observability (omer-metin/skills-for-antigravity, 162 stars), Cloudbase Agent Python (TencentCloudBase/CloudBase-AI-Toolkit, 1.1k stars), Sentry Elixir SDK (getsentry/sentry-for-ai, 268 stars) and Agentsop Observability Setup (agentsope/SkillAlchemy, 466 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Sentry Instrumentation?

langfuse (a GitHub organization) maintains it in langfuse/langfuse, which has 35,555 GitHub stars. The repository holds 33 skills in this directory. The repository was last updated on October 9, 2026.

Source: langfuse/langfuse on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.