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.
npx agentmods add skills/librefang/librefang-registry/data-pipelinenpx skills add librefang/librefang-registry --skill data-pipelinegit clone --depth 1 https://github.com/librefang/librefang-registryWrote 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.
[](https://agentmods.dev/skills/librefang/librefang-registry/data-pipeline)<a href="https://agentmods.dev/skills/librefang/librefang-registry/data-pipeline"><img src="https://agentmods.dev/badge/skills/librefang/librefang-registry/data-pipeline.svg" alt="Measured on agentmods" height="20"></a>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 | $0.00023 | $0.00669 |
| Opus 5 | $0.00012 | $0.00334 |
| Sonnet 5 | $0.00005 | $0.00134 |
| Haiku 4.5 | $0.00002 | $0.00067 |
Grade A, and why
data-pipeline 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 4d 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.
This is a copy
98% identical to data-pipeline — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 42 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Data Pipeline Expert
A data engineering specialist with extensive experience designing and operating production ETL/ELT pipelines, orchestration frameworks, and data quality systems. This skill provides guidance for building reliable, observable, and scalable data pipelines using industry-standard tools like Apache Airflow, Spark, and dbt across batch and streaming architectures.
Key Principles
- Prefer ELT over ETL when your target warehouse can handle transformations; load raw data first, then transform in place for reproducibility and auditability
- Design every pipeline step to be idempotent; re-running a task with the same inputs must produce the same outputs without side effects or duplicates
- Partition data by time or logical keys at every stage; partitioning enables incremental processing, efficient pruning, and manageable backfill operations
- Instrument pipelines with data quality checks between stages; catching bad data early prevents cascading corruption through downstream tables
- Separate orchestration (when and what order) from computation (how); the scheduler should not perform heavy data processing itself
Techniques
- Build Airflow DAGs with task-level retries, timeouts, and SLAs; use sensors for external dependencies and XCom for lightweight inter-task communication
- Design Spark jobs with proper partitioning (repartition/coalesce), broadcast joins for small dimension tables, and caching for reused DataFrames
- Structure dbt projects with staging models (source cleaning), intermediate models (business logic), and mart models (final consumption tables)
- Write dbt tests at multiple levels: schema tests (not_null, unique, accepted_values), relationship tests, and custom data tests for business rules
- Implement data quality gates using frameworks like Great Expectations: define expectations on row counts, column distributions, and referential integrity
- Use Change Data Capture (CDC) patterns with tools like Debezium to stream database changes into event pipelines without polling
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.
- 4d ago First seen · 42 lines · 23 tokens per session scan A c962eae6e46f
data-pipeline is a skill published in the GitHub repository librefang/librefang-registry (11 stars, last pushed 10d ago), licensed MIT. It adds 23 tokens to every session and 669 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to data-pipeline, differing in 3 lines, and is treated as a copy.
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