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duckdb-r: Skill for Claude Code

.claude/skills/series-forward/SKILL.md

series-forward is a skill for Claude Code from duckdb/duckdb-r. It costs 88 tokens per session (4,337 once invoked), scanned A, original, no licence file.

A Git workflow for moving a patch series onto a newer main branch by creating a forward copy beside the original and switching to it after it catches up. Git is the version-control system used to track code changes and branches.

In plain words
What is it for?
It is for forwarding a series when the main branch has moved underneath it and its branches need the newer base.
Why use it?
It lets branch users depend on a newer base without rewriting the existing reference they use. This avoids breaking consumers while the series is updated.

Skill for Claude Code ✓ vendor

Written for Claude Code: installed under .claude/.

This is duckdb/duckdb-r's own configuration. It tells Claude Code how to work on duckdb-r itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything duckdb-r configures →

not rated 231repo +1 changed 16d ago A scan 88 tokens custom licence
View source ↗ duckdb/duckdb-r r.duckdb.org
Reuse

Borrowing it

Nothing to install: this file belongs to duckdb/duckdb-r. 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/duckdb/duckdb-r/main/.claude/skills/series-forward/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/duckdb/duckdb-r

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.

agentmods badge for series-forward

README.md
[![agentmods](https://agentmods.dev/badge/skills/duckdb/duckdb-r/series-forward/github.svg)](https://agentmods.dev/skills/duckdb/duckdb-r/series-forward)
Your own site
<a href="https://agentmods.dev/skills/duckdb/duckdb-r/series-forward"><img src="https://agentmods.dev/badge/skills/duckdb/duckdb-r/series-forward/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.

agentmods 80×15 button for series-forward

Your own site · 80×15
<a href="https://agentmods.dev/skills/duckdb/duckdb-r/series-forward"><img src="https://agentmods.dev/badge/skills/duckdb/duckdb-r/series-forward.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,337 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 unknown 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 $0.00088 $0.04337
Opus 5.5 $0.00035 $0.01735
Sonnet 5.5 $0.00018 $0.00867
Haiku 4.5 $0.00009 $0.00434

Measured 16d ago against content hash 393fe616890d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

series-forward 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 16d 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/series-forward/SKILL.md · 334 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

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. 16d ago Changed · -113 lines · +18 tokens per session 393fe616890d
  2. 1mo ago Changed · +84 lines 966bf21f8ca0
  3. 1mo ago Changed · +21 lines 45df86a39765
  4. 1mo ago Changed · +43 lines d1dfb1e96806
  5. 1mo ago First seen · 299 lines · 70 tokens per session scan A 8d8e930f8729

Subscribe to this mod's changes

series-forward is a skill published in the GitHub repository duckdb/duckdb-r (231 stars, last pushed 14d ago), with no licence file. It adds 88 tokens to every session and 4,337 once invoked, about $0.0004 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 2026-09-13.

DatabasesGit and workflowduckdbolapr
Related

series-forward compared with skills from other repositories

series-forward next to 6 skills from other repositories
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series-forwardduckdb/duckdb-rSkill23114d agononeA88Claude Code
analytical-databases-expertpersonamanagmentlayer/pclSkill4411d agoApache-2.0A100Claude Code
duckdbericrisco/rsc-harnessSkill5032d agoMITC85Claude Code, Codex
duckdbalivirgo/Major-AI-SkillsSkill2yesterdayMITA45Claude Code
create-prprisma/ormSkill48kyesterdayApache-2.0A48Claude Code, Codex
draft-release-notesprisma/ormSkill48kyesterdayApache-2.0A174Claude Code, Codex
publish-npm-versionprisma/ormSkill48kyesterdayApache-2.0A182Claude Code, Codex