data-data-observability

data-data-observability is a skill for Claude Code, Codex from j4flmao/agent-skills. It costs 105 tokens per session (4,605 once invoked), scanned A, original, MIT.

A guide to monitoring the health of data across pipelines, warehouses, and reporting tools. It covers freshness, volume, schema changes, quality, lineage, anomalies, and incident response.

In plain words
What is it for?
It is for designing freshness and volume checks, detecting schema drift and anomalies, tracking lineage, setting alerts, and planning incident response.
Why use it?
It helps teams notice when data is late, missing, unexpectedly changed, or unreliable. This makes data incidents easier to investigate and manage.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: positional $N argument; mentions Codex.

Good fit It is for designing freshness and volume checks, detecting schema drift and…

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Install with agentmods
npx agentmods add skills/j4flmao/agent-skills/data-observability
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add j4flmao/agent-skills --skill data-observability
Clone the repo
git clone --depth 1 https://github.com/j4flmao/agent-skills

Made for: Claude Code, Codex.

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.

agentmods badge for data-data-observability

README.md
[![agentmods](https://agentmods.dev/badge/skills/j4flmao/agent-skills/data-observability.svg)](https://agentmods.dev/skills/j4flmao/agent-skills/data-observability)
Your own site
<a href="https://agentmods.dev/skills/j4flmao/agent-skills/data-observability"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/data-observability.svg" alt="Measured on agentmods" height="20"></a>
Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,605 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00105 $0.04605
Opus 5 $0.00053 $0.02302
Sonnet 5 $0.00021 $0.00921
Haiku 4.5 $0.00011 $0.00460

Measured 3d ago against content hash 16ee2469cd4d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

data-data-observability 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 3d 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.

skills/data/data-observability/SKILL.md · 502 lines

How it starts

The opening of the file, as written. The whole thing — 502 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Data Observability

Purpose

Design comprehensive data observability across pipelines: freshness, volume, schema, quality, lineage, and incident management.

Agent Protocol

Trigger

Exact user phrases: "data observability", "data quality monitoring", "data profiling", "data health", "freshness check", "row count anomaly", "schema drift", "data incident", "data lineage", "data monitoring", "observability platform".

Input Context

  • Data stack (warehouse, lake, pipelines, BI tools)
  • Number of tables/datasets to monitor
  • Existing quality checks and monitoring
  • Team size and on-call rotation
  • SLAs for data freshness and quality
  • Incident management workflow
  • Monitoring budget and tooling preferences

Output Artifact

Data observability architecture with monitoring checks, alerting rules, and incident response playbook.

Response Format

# Observability checks per dataset
# Freshness, volume, schema, quality
# Alert thresholds
# Incident response workflow

Completion Criteria

  • Freshness checks configured for all critical datasets
  • Volume monitoring with anomaly detection
  • Schema drift detection on source and staging tables
  • Quality checks on key columns (nulls, uniqueness, referential integrity)
  • Lineage tracking from source to dashboard
  • Alerting configured with severity levels
  • Incident response runbook written

Workflow

Step 1: Dataset Inventory

Catalog all datasets by criticality and ownership. Tier 1: executive dashboards, financial reports, customer-facing data, regulatory data. Tier 2: operational reports, team-level analytics, internal tools. Tier 3: experimental, exploratory, ad-hoc queries.

Inventory Schema

For each dataset: name, owner, tier, source system, freshness SLA, location (table/view/API), upstream dependencies, downstream consumers, expected row count range, quality rules.

Step 2: Freshness Monitoring

Freshness Checks

Check data arrival within expected SLA window. Monitor: last_updated timestamp vs expected schedule. For batch: compare DAG completion time to SLA time. For streaming: compare latest event timestamp to current time.

Read the full file on GitHub · 502 lines

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.

  1. 3d ago First seen · 502 lines · 105 tokens per session scan A 16ee2469cd4d

Subscribe to this mod's changes

data-data-observability is a skill published in the GitHub repository j4flmao/agent-skills (21 stars, last pushed yesterday), licensed MIT. It adds 105 tokens to every session and 4,605 once invoked, about $0.0005 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 2026-09-03.

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