What is prompt-librarian?

A curator for a shared collection of AI prompts. It organizes prompts into categories, adds labels and required metadata, records authorship, and manages their ranking.

It is for adding and publishing prompts, rebuilding categories, applying naming rules, recording sources, and ranking prompts by evaluation results.

It keeps the prompt library consistent, traceable, searchable, and limited to prompts that passed the required checks.

prompt-librarian — Agent for Claude Code by frankxai

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.

Clone the repo

git clone --depth 1 https://github.com/frankxai/agentic-creator-os

Made for: Claude Code.

Or install agentic-creator-os, the plugin that ships this one along with the rest of its 133 commands, 80 agents.

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/frankxai/agentic-creator-os/prompt-librarian/github.svg)](https://agentmods.dev/agents/frankxai/agentic-creator-os/prompt-librarian)

Your own site

<a href="https://agentmods.dev/agents/frankxai/agentic-creator-os/prompt-librarian"><img src="https://agentmods.dev/badge/agents/frankxai/agentic-creator-os/prompt-librarian/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/frankxai/agentic-creator-os/prompt-librarian"><img src="https://agentmods.dev/badge/agents/frankxai/agentic-creator-os/prompt-librarian.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 118 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,333 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.

Model	Per session	Once invoked
Fable 5.1	$0.00118	$0.01333
Opus 5.5	$0.00047	$0.00533
Sonnet 5.5	$0.00024	$0.00267
Haiku 4.5	$0.00012	$0.00133

Measured 2mo ago against content hash 709370e78319, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prompt-librarian 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 2mo 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/prompt-librarian.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Prompt Librarian

Mission

Be the curator. Every pattern that lands in repos/prompt-library/prompts/ is correctly named, frontmattered, attributed, evaluated, red-teamed, categorized, tagged, ranked. The Library-of-Alexandria invariants hold.

When to invoke

@prompt-conductor dispatches flow-curate.
Any flow with publish: true lands here as the final write step.
"rebuild the library", "rerank by eval score", "what categories do we have", "add this pattern".

Hard rules

Never publish a pattern missing: id, version, lane, category, provenance, eval.score, red_team.status.
Never publish with red_team.status: fail. Return to red-team.
Never publish with eval.score < 3.5. Return to optimizer.
Verb-prefix naming. All pattern IDs follow <verb>_<topic> (Fabric convention): analyze_*, create_*, extract_*, summarize_*, answer_*, audit_*, check_*, compare_*, improve_*, write_*, rate_*, introspect_*, profile_*.
One-folder-per-pattern. No mega-files. Each pattern is prompts/<id>/.
Attribution mandatory. provenance.source, provenance.source_url, provenance.attribution, provenance.license all present.
Banned phrases: pattern body runs through lib/voice/frankx-voice.ts check during publish.

Library invariants (verified on every publish)

All patterns have unique id.
All patterns have version in semver.
All patterns have a colocated evals/promptfoo.yaml.
All patterns have a colocated README.md with 80-word human summary.
All patterns with provenance.license other than original have an entry in ATTRIBUTION.md.
taxonomy/categories.yaml lists every category used.
taxonomy/techniques.yaml lists every technique tag used.
taxonomy/lanes.yaml lists every lane used.

Ranking method

Rankings are auto-generated to rankings/by-eval-score.md (eval score desc) and curated manually in rankings/top-50.md (editorial picks balancing eval, novelty, utility).

Read the full file on GitHub · 103 lines

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.

2mo ago First seen · 103 lines · 118 tokens per session scan A 709370e78319

Subscribe to this mod's changes

prompt-librarian is an agent published in the GitHub repository frankxai/agentic-creator-os (12 stars, last pushed yesterday), licensed Apache-2.0. It adds 118 tokens to every session and 1,333 once invoked, about $0.0005 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 2026-08-31.

Claude Code Data and AI Multi-Agent Prompting agentic-skills ai-agents autonomous-coding claude-code-plugins

prompt-librarian next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
prompt-librarianfrankxai/agentic-creator-os	Agent	12	yesterday	Apache-2.0	A	118	Claude Code
Architekt aplikacji LLMTheJacksonCode/Agent-Architecture	Agent	110	1mo ago	MIT	A	103	Claude Code
Traktuje prompt jak kodTheJacksonCode/Agent-Architecture	Agent	110	1mo ago	MIT	A	116	Claude Code
prompt-engineer-pmVandanaAjayDubey111/great-pm	Agent	3	1mo ago	MIT	A	71	Claude Code
llm-engineer10Legs/freelance-developer-harness	Agent	33	2mo ago	MIT	A	109	Claude Code
llm-integration-agentboranesn/agentic-base	Agent	3	3mo ago	MIT	A	47	Claude Code
ai-evaluatorProductfculty-aipm/PM-Copilot-by-Product-Faculty	Agent	80	6mo ago	none	A	282	Claude Code