learn

learn is a command for Claude Code from XRenSiu/claude-code-forge. It costs 0 tokens per session (1,466 once invoked), scanned A, original, MIT.

A session-learning command that extracts reusable patterns, solutions, practices, or avoided mistakes from the current conversation. It saves them as a skill, rule, or pattern, or shows a preview first.

In plain words
What is it for?
Use it after solving a recurring problem, discovering an implementation pattern, or establishing a project rule that should be reused in later work.
Why use it?
Useful knowledge from a solved problem can otherwise disappear when the session ends. It preserves that knowledge for reuse and can add it to an existing skill or rule.

Command for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: reads .claude/ paths; mentions CLAUDE.md.

Part of the pdforge plugin — 10 skills, 13 commands, 5 agents, 2 hooks shipped together

Good fit Use it after solving a recurring problem, discovering an implementation pattern, or establishing a project rule that should be reused in later work.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/xrensiu/claude-code-forge/learn
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/XRenSiu/claude-code-forge

Made for: Claude Code.

Or install pdforge, the plugin that ships this one along with the rest of its 10 skills, 13 commands, 5 agents, 2 hooks.

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 learn

README.md
[![agentmods](https://agentmods.dev/badge/commands/xrensiu/claude-code-forge/learn/github.svg)](https://agentmods.dev/commands/xrensiu/claude-code-forge/learn)
Your own site
<a href="https://agentmods.dev/commands/xrensiu/claude-code-forge/learn"><img src="https://agentmods.dev/badge/commands/xrensiu/claude-code-forge/learn/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 learn

Your own site · 80×15
<a href="https://agentmods.dev/commands/xrensiu/claude-code-forge/learn"><img src="https://agentmods.dev/badge/commands/xrensiu/claude-code-forge/learn.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,466 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 $0.00000 $0.01466
Opus 5.5 $0.00000 $0.00586
Sonnet 5.5 $0.00000 $0.00293
Haiku 4.5 $0.00000 $0.00147

Measured 1mo ago against content hash 4209479148cb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

learn 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/pdforge/commands/learn.md · 285 lines

How it starts

The opening of the file, as written. The whole thing — 285 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/learn Command

独特功能! Extract reusable patterns from the current session into Skills or Rules.

Purpose

Traditional workflow: Problem solved → Knowledge lost With /learn: Problem solved → Pattern extracted → Knowledge preserved

This command analyzes the current conversation to identify:

  • Recurring patterns
  • Novel solutions
  • Best practices discovered
  • Anti-patterns avoided

Usage

/learn [output-type] [options]

Arguments

Argument Required Default Description
output-type No auto What to create: skill, rule, pattern, auto

Options

Option Description
--name Name for the extracted artifact
--description Description of what was learned
--preview Show what would be extracted without saving
--append Append to existing skill/rule instead of creating new

Examples

# Auto-detect what to extract
/learn

# Extract as a new skill
/learn skill --name "handling-webhook-retries"

# Extract as a rule
/learn rule --name "api-versioning-pattern"

# Preview without saving
/learn --preview

# Add to existing skill
/learn --append skills/error-handling

What Gets Extracted

From Debugging Sessions

Pattern: "Root cause analysis for race conditions"
Extracted:
  - Reproduction steps
  - Diagnostic commands used
  - Solution approach
  - Prevention strategies

From Implementation Sessions

Pattern: "OAuth2 flow implementation"
Extracted:
  - Architecture decisions
  - Security considerations
  - Error handling patterns
  - Testing strategies

From Review Sessions

Pattern: "Common TypeScript pitfalls"
Extracted:
  - Anti-patterns found
  - Recommended alternatives
  - Detection commands

Output Types

skill

Creates a new Skill in .claude/skills/:

---
name: [extracted-name]
description: [Use when...] Extracted from session on [date].
---

# [Skill Name]

## Context
[Why this pattern emerged]

## Pattern
[The reusable workflow/approach]

## Examples
[Code from the session]

## Anti-patterns
[What to avoid, if discovered]

Read the full file on GitHub · 285 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 · 285 lines · 0 tokens per session scan A 4209479148cb

Subscribe to this mod's changes

learn is a command published in the GitHub repository XRenSiu/claude-code-forge (2 stars, last pushed 29d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,466 tokens. 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 2026-09-05.