kb-add

A knowledge-base helper that saves a learning, rule, or note in the most suitable knowledge-base file.

In plain words
What is it for?
Adding notes to a project's knowledge base, creating or updating files, and maintaining tags, dates, links, and other frontmatter.
Why use it?
It removes the need to decide where each new piece of project knowledge belongs and keeps required file metadata consistent.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/charlesjones-dev/claude-code-plugins-dev/kb-add
Any agent
npx skills add charlesjones-dev/claude-code-plugins-dev --skill kb-add
Clone the repo
git clone --depth 1 https://github.com/charlesjones-dev/claude-code-plugins-dev

Made for: Claude Code, Codex.

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,182 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00031 $0.02182
Opus 5 $0.00015 $0.01091
Sonnet 5 $0.00006 $0.00436
Haiku 4.5 $0.00003 $0.00218

Measured 2d ago against content hash b9b33cd66712, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

kb-add 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 2d 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/ai-knowledge/skills/kb-add/SKILL.md · 163 lines

How it starts

The opening of the file, as written. The whole thing — 163 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Knowledge Base Quick Add

You are a knowledge base assistant. Your job is to take a piece of knowledge from the user and save it to the appropriate KB file.

Frontmatter Schema

Every KB file you create or update MUST have valid YAML frontmatter. When creating a new file, include all required fields. When updating an existing file whose content actually changed, set last-updated to today's date.

---
tags: [topic-tag-1, topic-tag-2]       # Required: lowercase tags for discovery
related: [[other-kb-file]]             # Optional: cross-references to related KB files
created: YYYY-MM-DD                    # Required: date created
last-updated: YYYY-MM-DD              # Required: date last modified (update on every write)
pinned: false                          # Optional: true = always loaded. Default false
scope: "src/api/**"                    # Optional: glob pattern(s) for auto-matching. String or array.
---

Resolving today's date (cross-platform, CRITICAL): Never guess, infer, or increment prior dates. When this skill writes created / last-updated, resolve today's date once at the start of the write phase, then reuse that single value for every write. Try these commands in order and use the first that returns a YYYY-MM-DD string:

  • macOS / Linux / WSL / Git Bash (bash, zsh, sh): date +%Y-%m-%d
  • Windows PowerShell / pwsh: Get-Date -Format 'yyyy-MM-dd'
  • Windows cmd.exe: powershell -NoProfile -Command "Get-Date -Format 'yyyy-MM-dd'"
  • Portable fallback (Node or Python available): node -e "console.log(new Date().toISOString().slice(0,10))" or python -c "import datetime; print(datetime.date.today().isoformat())"

Only update last-updated when the file's content actually changed. If an edit would leave the file byte-identical, do not rewrite it or bump the date.

When a KB file has related entries in its frontmatter, you MUST also include a ## Related section at the end of the file body with the same references as [[wiki-links]]. This enables Obsidian graph view and link navigation. Always keep the related frontmatter AND the body ## Related section in sync. If there are no related files, omit the ## Related section entirely.

Read the full file on GitHub · 163 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. 2d ago First seen · 163 lines · 31 tokens per session scan A b9b33cd66712

Subscribe to this mod's changes

kb-add is a skill published in the GitHub repository charlesjones-dev/claude-code-plugins-dev (34 stars, last pushed 1mo ago), licensed MIT. It adds 31 tokens to every session and 2,182 once invoked, about $0.0002 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 2026-08-30.

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