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.
npx skills add madeinoz67/madeinoz-knowledge-system --skill skill-developergit clone --depth 1 https://github.com/madeinoz67/madeinoz-knowledge-systemWrote 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/madeinoz67/madeinoz-knowledge-system/skill-developer)<a href="https://agentmods.dev/skills/madeinoz67/madeinoz-knowledge-system/skill-developer"><img src="https://agentmods.dev/badge/skills/madeinoz67/madeinoz-knowledge-system/skill-developer.svg" alt="Measured on agentmods" 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 | $0.00097 | $0.03001 |
| Opus 5 | $0.00048 | $0.01501 |
| Sonnet 5 | $0.00019 | $0.00600 |
| Haiku 4.5 | $0.00010 | $0.00300 |
Grade A, and why
skill-developer 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 8d 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.
This is a copy
80% identical to skill-developer — 91 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 432 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Skill Developer Guide
Purpose
Comprehensive guide for creating and managing skills in Claude Code with auto-activation system, following Anthropic's official best practices including the 500-line rule and progressive disclosure pattern.
When to Use This Skill
Automatically activates when you mention:
- Creating or adding skills
- Modifying skill triggers or rules
- Understanding how skill activation works
- Debugging skill activation issues
- Working with skill-rules.json
- Hook system mechanics
- Claude Code best practices
- Progressive disclosure
- YAML frontmatter
- 500-line rule
System Overview
Two-Hook Architecture
1. UserPromptSubmit Hook (Proactive Suggestions)
- File:
.claude/hooks/codanna/skill-activation-prompt.ts - Trigger: BEFORE Claude sees user's prompt
- Purpose: Suggest relevant skills based on keywords + intent patterns
- Method: Injects formatted reminder as context (stdout → Claude's input)
- Use Cases: Topic-based skills, implicit work detection
2. PreToolUse Hook - Read Validation (Resource Management)
- File:
.claude/hooks/codanna/pre_read_use.js - Trigger: BEFORE Read tool executes
- Purpose: Validate Read operations to prevent excessive line reads
- Method: Checks requested line limit against thresholds, blocks/warns on large reads
- Use Cases: Prevent token waste, encourage efficient file reading patterns
- Thresholds:
- Allow: ≤400 lines (silent)
- Warn: 401-600 lines (logged, shown to Claude)
- Block: >600 lines (operation blocked)
Configuration File
Location: .claude/skills/skill-rules.json
Defines:
- All skills and their trigger conditions
- Enforcement levels (block, suggest, warn)
- File path patterns (glob)
- Content detection patterns (regex)
- Skip conditions (session tracking, file markers, env vars)
Skill Types
1. Guardrail Skills
Purpose: Enforce critical best practices that prevent errors
Characteristics:
- Type:
"guardrail" - Enforcement:
"block" - Priority:
"critical"or"high" - Block file edits until skill used
- Prevent common mistakes (column names, critical errors)
- Session-aware (don't repeat nag in same session)
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 8d ago First seen · 432 lines · 97 tokens per session scan A 94d5b217b75c
skill-developer is a skill published in the GitHub repository madeinoz67/madeinoz-knowledge-system (3 stars, last pushed 4mo ago), licensed MIT. It adds 97 tokens to every session and 3,001 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. It is 80% identical to skill-developer, differing in 91 lines, and is treated as a copy.
Other skills, from other repositories
autoreview
Pre-commit/ship code review: Codex default; optional Claude or Pi.
graph-mutation-plan
Cookbook for composing an applygraphmutations plan — stable entitykey patterns, the canonical label/edge vocabulary, evidence/invalidation/confidence discipline, and a worked example. Load this when building a non-trivial mutation plan.
convex-insights
Query a running Convex app's logs + health in natural language (official MCP): failures, slow/expensive functions, deploy causality — scoped, evidence-backed, with a dashboard deep link.
happiness-skill
A Chinese-language guide to happiness based on reducing unmet wants, focusing on the present, and treating happiness as a trainable skill.
openclaw-design-system
Compatibility alias for existing OpenClaw installations that now applies Carapace semantic tokens, themes, shared CSS foundations, consumer adapters, and established local primitives.
convex-add
Add a capability to the CURRENT Convex app — consults the served Convex capability catalog for always-current procedures (billing, crons, auth, agent, search, …); falls back to built-in hosting or @convex-dev component search. TRIGGER when the user runs /add, or asks to add hosting/publishing or any backend capability…