learning-to-rule-or-skill

learning-to-rule-or-skill is a skill for Claude Code, Codex from event4u-app/agent-config. It costs 42 tokens per session (3,857 once invoked), scanned A, original, MIT.

A process for turning repeated mistakes or successful patterns into reusable rules or skills for a coding agent.

In plain words
What is it for?
Use it after a task, during a retrospective, or when audit logs show a recurring pattern worth capturing.
Why use it?
It helps preserve lessons from completed work so the same problem does not have to be solved from scratch each time.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it after a task, during a retrospective, or when audit logs show a recurring pattern worth capturing.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/event4u-app/agent-config/learning-to-rule-or-skill
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.

Any agent
npx skills add event4u-app/agent-config --skill learning-to-rule-or-skill
Clone the repo
git clone --depth 1 https://github.com/event4u-app/agent-config

Made for: Claude Code, Codex.

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 learning-to-rule-or-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/event4u-app/agent-config/learning-to-rule-or-skill/github.svg)](https://agentmods.dev/skills/event4u-app/agent-config/learning-to-rule-or-skill)
Your own site
<a href="https://agentmods.dev/skills/event4u-app/agent-config/learning-to-rule-or-skill"><img src="https://agentmods.dev/badge/skills/event4u-app/agent-config/learning-to-rule-or-skill/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 learning-to-rule-or-skill

Your own site · 80×15
<a href="https://agentmods.dev/skills/event4u-app/agent-config/learning-to-rule-or-skill"><img src="https://agentmods.dev/badge/skills/event4u-app/agent-config/learning-to-rule-or-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,857 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Rogue Agent · line 73
    Skill modifies its own code, configuration, or behavior at runtime. Self-modification enables an agent to escalate privileges, disable safety constraints, or install persistent backdoors.
    Fix: Prevent the skill from modifying its own code, SKILL.md, or configuration files. Treat skill files as read-only at runtime.
How audits are shown
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 $0.00042 $0.03857
Opus 5 $0.00021 $0.01929
Sonnet 5 $0.00008 $0.00771
Haiku 4.5 $0.00004 $0.00386

Measured 2d ago against content hash e515d216e86c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

learning-to-rule-or-skill 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.

src/skills/learning-to-rule-or-skill/SKILL.md · 399 lines

How it starts

The opening of the file, as written. The whole thing — 399 lines — stays where its author put it; the contents beside it link to each section on GitHub.

learning-to-rule-or-skill

When to use

Use this skill when:

  • A repeated mistake appears across multiple tasks
  • A successful pattern should be reused in the future
  • A new constraint or workflow should be captured permanently
  • Reviewing post-task learnings or retrospectives
  • Deciding whether a learning belongs in a rule or a skill
  • After completing a task — reflecting on what worked or caused friction
  • Mining the audit log (agents/runtime/state/audit/<YYYY-MM>.jsonl, audit-log-v1) surfaced a repeated phase pattern via extract_audit_patterns.ts — the pattern's count ≥ 2 already satisfies the repetition gate
  • A comparative analysis handed over a ### SEED — block from its ## Seeds section (/analyze:repo § 6). This is an accepted intake shape: the block already carries the proposed name, kind, target template, one-line description, and the Extends instead? answer, so step 4's overlap search starts from a stated candidate rather than a blank page — it does not skip that search, and a seed whose Extends instead? line is missing is incomplete intake, not a shortcut. The repetition gate is satisfied differently here: the evidence is the anchored ADOPT/ADAPT verdict behind the seed rather than a recurrence count — a mechanism confirmed once against a named own-repo defect is not the one-off case the gate exists to filter.

Do not use this skill when:

  • The learning is one-off and unlikely to repeat
  • The issue is too vague to turn into guidance
  • The content already exists in an equivalent rule or skill

Goal

  • Turn repeated learnings into reusable project guidance
  • Decide correctly between rule, skill, or update to an existing one
  • Prevent the same mistakes from happening again
  • Keep the system small, clear, and non-duplicative

Preconditions

  • A concrete learning, mistake, or successful pattern exists
  • The learning can be stated clearly in one or two sentences
  • Existing rules and skills can be checked for overlap

Read the full file on GitHub · 399 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 Changed e515d216e86c
  2. 4d ago Changed 14304cf4adf9
  3. 8d ago First seen · 399 lines · 42 tokens per session scan A cebd25b197f9

Subscribe to this mod's changes

learning-to-rule-or-skill is a skill published in the GitHub repository event4u-app/agent-config (10 stars, last pushed today), licensed MIT. It adds 42 tokens to every session and 3,857 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 2026-09-04.

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