kb-register-library

kb-register-library is a skill for Claude Code from SteveGJones/ai-first-sdlc-practices. It costs 61 tokens per session (1,211 once invoked), scanned A, original, MIT.

A registration tool for adding an external knowledge-base library to a shared user-level registry. It checks the library path and its index file before saving the library's name and location.

In plain words
What is it for?
Use it to register a library directory, validate its required shelf index and format version, and store an optional description.
Why use it?
It avoids invalid or duplicate library entries and makes a registered knowledge base available for activation across projects.

Skill for Claude Code

Written for Claude Code: disable-model-invocation in frontmatter.

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/steve/corp/semi/library.

Part of the sdlc-knowledge-base plugin — 16 skills, 4 agents shipped together

Good fit Use it to register a library directory, validate its required shelf index and format version, and store an optional description.

Compare 6 skills from other repositories ↓
Install

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.

Claude Code
/plugin marketplace add SteveGJones/ai-first-sdlc-practices
Claude Code
/plugin install sdlc-knowledge-base

Made for: Claude Code.

Or install sdlc-knowledge-base, the plugin that ships this one along with the rest of its 16 skills, 4 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.

agentmods badge for kb-register-library

README.md
[![agentmods](https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-register-library/github.svg)](https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-register-library)
Your own site
<a href="https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-register-library"><img src="https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-register-library/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 kb-register-library

Your own site · 80×15
<a href="https://agentmods.dev/skills/stevegjones/ai-first-sdlc-practices/kb-register-library"><img src="https://agentmods.dev/badge/skills/stevegjones/ai-first-sdlc-practices/kb-register-library.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,211 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 $0.00061 $0.01211
Opus 5.5 $0.00024 $0.00484
Sonnet 5.5 $0.00012 $0.00242
Haiku 4.5 $0.00006 $0.00121

Measured 1mo ago against content hash ab711c2f52ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

kb-register-library 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.

plugins/sdlc-knowledge-base/skills/kb-register-library/SKILL.md · 131 lines

How it starts

The opening of the file, as written. The whole thing — 131 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Register External Library

Add an external knowledge base to the user-scope global registry so it can be activated in any project's .sdlc/libraries.json.

Arguments

  • <name> — a short handle used in attribution output. Lowercase-kebab-case recommended (e.g., corporate-semiconductor, corp-healthcare). Must be unique within ~/.sdlc/global-libraries.json.
  • <absolute-path-to-library-dir> — the absolute path to the library directory (the one containing _shelf-index.md), not the repo root. Must exist at registration time.
  • [description] — optional human note for the user's own reference. Not used by any system behaviour.

Preflight

  • Verify the registry file's parent directory exists. Create ~/.sdlc/ if missing.
  • If ~/.sdlc/global-libraries.json exists, load and validate it.
  • Validate <name> matches ^[a-z][a-z0-9-]*$ (lowercase letters, digits, hyphens; must start with a letter). If not, error with: "Library handle must match ^[a-z][a-z0-9-]*$ — found ''. Choose a different name."
  • If the chosen <name> is already registered, error out with the existing entry's path shown; recommend a different name or manual JSON edit.

Steps

1. Validate the target library path

Run the path validator:

python3 -c "
import sys, os, importlib.util
PLUGIN_ROOT = os.environ.get('CLAUDE_PLUGIN_ROOT', '')
SCRIPTS = os.path.join(PLUGIN_ROOT, 'scripts')
INIT = os.path.join(SCRIPTS, '__init__.py')
if os.path.isfile(INIT) and 'sdlc_knowledge_base_scripts' not in sys.modules:
    spec = importlib.util.spec_from_file_location(
        'sdlc_knowledge_base_scripts',
        INIT,
        submodule_search_locations=[SCRIPTS],
    )
    if spec and spec.loader:
        module = importlib.util.module_from_spec(spec)
        sys.modules['sdlc_knowledge_base_scripts'] = module
        spec.loader.exec_module(module)
from pathlib import Path
from sdlc_knowledge_base_scripts.registry import validate_library_path
ok, reason = validate_library_path(Path('<path>'))
if not ok:
    print(f'ERROR: {reason}')
    exit(1)
print('OK')
"

Read the full file on GitHub · 131 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.

  1. 1mo ago First seen · 131 lines · 61 tokens per session scan A ab711c2f52ef

Subscribe to this mod's changes

kb-register-library is a skill published in the GitHub repository SteveGJones/ai-first-sdlc-practices (41 stars, last pushed 15d ago), licensed MIT. It adds 61 tokens to every session and 1,211 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 2026-09-03.

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