Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add queelius/claude-anvil/plugin install kdpWrote 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/queelius/claude-anvil/kdp-listing)<a href="https://agentmods.dev/skills/queelius/claude-anvil/kdp-listing"><img src="https://agentmods.dev/badge/skills/queelius/claude-anvil/kdp-listing/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.
<a href="https://agentmods.dev/skills/queelius/claude-anvil/kdp-listing"><img src="https://agentmods.dev/badge/skills/queelius/claude-anvil/kdp-listing.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00060 | $0.02290 |
| Opus 5 | $0.00030 | $0.01145 |
| Sonnet 5 | $0.00012 | $0.00458 |
| Haiku 4.5 | $0.00006 | $0.00229 |
Grade A, and why
kdp-listing 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 197 lines — stays where its author put it; the contents beside it link to each section on GitHub.
KDP Listing Craft
Generate the four marketing artifacts for an Amazon KDP listing: blurb (book description), keywords, BISAC categories, and author bio. This skill gathers just enough context about the book to write effective marketing copy, then saves all artifacts to the user's project config.
Workflow
1. Load User Config
Read .claude/kdp.local.md if it exists (Read tool). Extract the kdp section and author metadata from YAML frontmatter. Key fields to look for:
kdp.blurb— existing blurb draft (if any)kdp.keywords— existing keyword listkdp.categories— existing BISAC categorieskdp.author_bio— existing biokdp.pen_name— pen name (if different fromauthor.name)kdp.series— series name and volume numberkdp.genre— declared genreauthor.name— author's real nameauthor.bio— general bio text
If the config file is missing, offer to create one from the template at ${CLAUDE_PLUGIN_ROOT}/docs/user-config-template.md.
2. Analyze the Manuscript
Gather enough context to write marketing copy. This skill does not read or analyze the full manuscript — it collects what it needs to sell the book.
Scan for existing context docs (Glob tool): Search for files that summarize the book's content and intent:
outline*,synopsis*,summary*,pitch*worldbuild*,blurb*,logline*README*,CONCEPT*,PREMISE*
Read found docs (Read tool): Read any matching files. These often contain the clearest distillation of what the book is about — more useful for marketing copy than the manuscript itself.
Read the opening (Read tool): Find and read the first chapter or opening section to understand tone, voice, and genre register. Look for the first chapter file, or the first 100 lines of the main manuscript file. The opening establishes the voice that the blurb should echo.
Ask the user to fill gaps: After reading available context, ask for anything still missing:
- Describe the book in 2-3 sentences (the "elevator pitch")
- Name the core conflict or central question
- Identify 2-3 comparable titles ("readers who liked X will like this")
- Describe the target reader (who picks this book up and why)
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.
- 9d ago First seen · 197 lines · 60 tokens per session scan A f05d64e658b0
kdp-listing is a skill published in the GitHub repository queelius/claude-anvil (2 stars, last pushed 2mo ago), licensed MIT. It adds 60 tokens to every session and 2,290 once invoked, about $0.0003 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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