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sailfin: Skill for Claude Code

.claude/skills/pin-seed/SKILL.md

pin-seed is a skill for Claude Code from SailfinIO/sailfin. It costs 0 tokens per session (868 once invoked), scanned A, original, GPL-2.0.

A release-version tool for the Sailfin seed compiler, which is the compiler used to build the Sailfin compiler itself.

In plain words
What is it for?
Use it to pin Sailfin to a named released seed version and optionally run a smoke compile.
Why use it?
It updates the project to use a specific compiler version, downloads that version, and can check that it builds correctly.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

This is SailfinIO/sailfin's own configuration. It tells Claude Code how to work on sailfin 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 sailfin configures →

not rated 8repo 2d ago A scan 0 tokens GPL-2.0
View source ↗ SailfinIO/sailfin sfn.dev
Reuse

Borrowing it

Nothing to install: this file belongs to SailfinIO/sailfin. 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/SailfinIO/sailfin/main/.claude/skills/pin-seed/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/SailfinIO/sailfin

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 pin-seed

README.md
[![agentmods](https://agentmods.dev/badge/skills/sailfinio/sailfin/pin-seed/github.svg)](https://agentmods.dev/skills/sailfinio/sailfin/pin-seed)
Your own site
<a href="https://agentmods.dev/skills/sailfinio/sailfin/pin-seed"><img src="https://agentmods.dev/badge/skills/sailfinio/sailfin/pin-seed/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 pin-seed

Your own site · 80×15
<a href="https://agentmods.dev/skills/sailfinio/sailfin/pin-seed"><img src="https://agentmods.dev/badge/skills/sailfinio/sailfin/pin-seed.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 868 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 $0.00000 $0.00868
Opus 5.5 $0.00000 $0.00347
Sonnet 5.5 $0.00000 $0.00174
Haiku 4.5 $0.00000 $0.00087

Measured 1mo ago against content hash 29bb4c9a9834, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

pin-seed 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 1mo ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/pin.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/pin-seed/SKILL.md · 86 lines

The source is not reproduced here

Licensed GPL-2.0

The repository is licensed GPL-2.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

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. 1mo ago First seen · 86 lines · 0 tokens per session scan A 29bb4c9a9834

Subscribe to this mod's changes

pin-seed is a skill published in the GitHub repository SailfinIO/sailfin (8 stars, last pushed 2d ago), licensed GPL-2.0. It costs nothing until one of its globs matches a file; then it loads 868 tokens. 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 2026-10-02.

Languagescapability-based-securitycompile-time-safetycompilerconcurrencyprogramming-languageruntime
Related

pin-seed compared with skills from other repositories

pin-seed next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
pin-seedSailfinIO/sailfinSkill82d agoGPL-2.0A0Claude Code
cicilisaman-pasha/ciciliSkill505d agoGPL-3.0A64Claude Code, Codex
swift-docspledgeandgrow/pledge-skillsSkill103mo agoMITA32Claude Code, Codex
migrate-oxfmtoxc-project/oxcSkill23ktodayMITA48Claude Code, Codex
vera-languageaallan/veraSkill420todayMITA61Claude Code, Codex
module-newphel-lang/phel-langSkill5334d agoMITA13Claude Code
integration-fixturephel-lang/phel-langSkill5334d agoMITA10Claude Code