haiku45

haiku45 is a skill for Claude Code from V-Songbird/slag. It costs 187 tokens per session (368 once invoked), scanned A, original, MIT.

A project-audit skill that grades the rules in CLAUDE.md and its rule files, plus project skill descriptions, for Claude Haiku 4.5. Claude Haiku 4.5 is a specific language model.

In plain words
What is it for?
Use it when you want project instructions and skills reviewed from Claude Haiku 4.5's perspective.
Why use it?
It provides the same audit and rewrite workflow as the related assay command, with findings written for that model.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

Part of the assay plugin — 9 skills shipped together

Good fit Use it when you want project instructions and skills reviewed from Claude Haiku 4.5's perspective.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/v-songbird/slag/haiku45
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 V-Songbird/slag --skill haiku45
Clone the repo
git clone --depth 1 https://github.com/V-Songbird/slag

Made for: Claude Code.

Or install assay, the plugin that ships this one along with the rest of its 9 skills.

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 haiku45

README.md
[![agentmods](https://agentmods.dev/badge/skills/v-songbird/slag/haiku45/github.svg)](https://agentmods.dev/skills/v-songbird/slag/haiku45)
Your own site
<a href="https://agentmods.dev/skills/v-songbird/slag/haiku45"><img src="https://agentmods.dev/badge/skills/v-songbird/slag/haiku45/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 haiku45

Your own site · 80×15
<a href="https://agentmods.dev/skills/v-songbird/slag/haiku45"><img src="https://agentmods.dev/badge/skills/v-songbird/slag/haiku45.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 187 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 368 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 $0.00187 $0.00368
Opus 5 $0.00093 $0.00184
Sonnet 5 $0.00037 $0.00074
Haiku 4.5 $0.00019 $0.00037

Measured 12d ago against content hash 2a60032bf8a9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

haiku45 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 12d 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.

assay/skills/haiku45/SKILL.md · 26 lines

What it actually says

assay:haiku45

Model target: Claude Haiku 4.5.

Follow ../_shared/audit.md start to finish. That file is the whole procedure — the flags, the seven steps, the report and the fix menu — and this one deliberately repeats none of it.

Carry the target above into your closing sentences, so the reader knows who the advice was written for.

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. 12d ago First seen · 26 lines · 187 tokens per session scan A 2a60032bf8a9

Subscribe to this mod's changes

haiku45 is a skill published in the GitHub repository V-Songbird/slag (1 stars, last pushed 7d ago), licensed MIT. It adds 187 tokens to every session and 368 once invoked, about $0.0009 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 2026-08-31.

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