A guide for defining service reliability targets using service-level indicators (SLIs), service-level objectives (SLOs), and error budgets. An SLI is a measured service signal, an SLO is its target, and an error budget is the allowed amount of failure.

Use it to choose indicators for APIs, batch jobs, or frontends, create SLO documents, calculate error budgets, set burn-rate alerts, and run periodic reviews.

It helps teams set measurable service-quality expectations and decide when reliability work should take priority. It also provides a way to review targets and plan alerts based on them.

How AsiaOstrich/EngramGraph configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to AsiaOstrich/EngramGraph. 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/AsiaOstrich/EngramGraph/main/.agents/skills/slo-assistant/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/AsiaOstrich/EngramGraph

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/asiaostrich/engramgraph/slo-assistant/github.svg)](https://agentmods.dev/skills/asiaostrich/engramgraph/slo-assistant)

Your own site

<a href="https://agentmods.dev/skills/asiaostrich/engramgraph/slo-assistant"><img src="https://agentmods.dev/badge/skills/asiaostrich/engramgraph/slo-assistant/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/asiaostrich/engramgraph/slo-assistant"><img src="https://agentmods.dev/badge/skills/asiaostrich/engramgraph/slo-assistant.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 82 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 615 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	$0.00082	$0.00615
Opus 5.5	$0.00033	$0.00246
Sonnet 5.5	$0.00016	$0.00123
Haiku 4.5	$0.00008	$0.00061

Measured 14d ago against content hash 832b154b02d9, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

slo 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 14d 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.

.agents/skills/slo-assistant/SKILL.md · 53 lines

What it actually says

SLO Assistant | SLO 助手

Language: English | 繁體中文

Guide SLI selection, SLO setting methodology, and Error Budget management.

引導 SLI 選取、SLO 設定方法論和 Error Budget 管理。

Capabilities | 功能

Capability	Description	說明
SLI Selection	Guide SLI choice by service type (API/Batch/Frontend)	按服務類型引導 SLI 選取
SLO Setting	5-step SLO setting methodology	5 步驟 SLO 設定方法論
Error Budget	Calculate budget, set burn rate alerts	計算預算、設定 burn rate 告警
SLO Document	Generate SLO specification document	產生 SLO 規格文件
SLO Review	Quarterly SLO review guide	季度 SLO 審查引導

Usage | 使用方式

/slo                              # Show SLO guide
/slo create "payment-service"     # Create SLO for service
/slo review                       # Quarterly SLO review
/slo budget                       # Error Budget calculation

Next Steps Guidance | 下一步引導

SLO 引導完成。建議下一步：

執行 /observability --alerting 設定 SLO-based 告警 ⭐ 推薦

執行 /incident 整合 SLO 影響評估

執行 /checkin 提交變更

Reference | 參考

Detailed guide: guide.md — SLI/SLO/error-budget definition and management. Read it when defining SLOs, selecting SLIs, calculating error budgets, or setting reliability targets.
Core standard: slo-standards.md
Related: observability-standards.md
Related: alerting-standards.md

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

guide.md 7.1 KB

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.

14d ago First seen · 53 lines · 82 tokens per session scan A 832b154b02d9

Subscribe to this mod's changes

slo is a skill published in the GitHub repository AsiaOstrich/EngramGraph (3 stars, last pushed today), licensed MIT. It adds 82 tokens to every session and 615 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-10-16.

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