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sailfin: Agent for Claude Code

.claude/agents/seed-stabilizer.md

seed-stabilizer is an agent for Claude Code from SailfinIO/sailfin. It costs 58 tokens per session (1,614 once invoked), scanned A, original, GPL-2.0.

A specialist debugging agent for compiler problems that affect self-hosting, meaning a compiler building or correctly compiling its own source code.

In plain words
What is it for?
Use it when compiler builds fail, produce incorrect results, or become slower or more memory-intensive, and detailed intermediate-code analysis is needed.
Why use it?
It focuses investigation on wrong compiled output, LLVM intermediate-code errors, and regressions in memory use or build speed.

Agent for Claude Code

Written for Claude Code: effort in frontmatter. Also seen: model 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 58 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/agents/seed-stabilizer.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 seed-stabilizer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/sailfinio/sailfin/seed-stabilizer"><img src="https://agentmods.dev/badge/agents/sailfinio/sailfin/seed-stabilizer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,614 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 $0.00058 $0.01614
Opus 5.5 $0.00023 $0.00646
Sonnet 5.5 $0.00012 $0.00323
Haiku 4.5 $0.00006 $0.00161

Measured 1mo ago against content hash 0c9ff48acd1b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

seed-stabilizer 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.

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/agents/seed-stabilizer.md · 101 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

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 · 101 lines · 58 tokens per session scan A 0c9ff48acd1b

Subscribe to this mod's changes

seed-stabilizer is an agent published in the GitHub repository SailfinIO/sailfin (8 stars, last pushed 2d ago), licensed GPL-2.0. It adds 58 tokens to every session and 1,614 once invoked, about $0.0002 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 2026-10-02.

Debuggingcapability-based-securitycompile-time-safetycompilerconcurrencyprogramming-languageruntime
Related

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