learn-dev

learn-dev is a command for Claude Code from punt-labs/quarry. It costs 31 tokens per session (182 once invoked), scanned A, original, MIT.

A command for saving a durable fact, URL, or distilled lesson to a developer memory system. A saved lesson is given preference during later retrieval.

In plain words
What is it for?
Use it to remember project facts, ingest a URL, or save a reusable lesson, optionally with a name.
Why use it?
It keeps useful knowledge from being lost between tasks or sessions.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the quarry-dev plugin — 1 skill, 16 commands, 1 agent, 5 hooks shipped together

Good fit Use it to remember project facts, ingest a URL, or save a…

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/punt-labs/quarry/learn-dev
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/punt-labs/quarry

Made for: Claude Code.

Or install quarry-dev, the plugin that ships this one along with the rest of its 1 skill, 16 commands, 1 agent, 5 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-dev

README.md
[![agentmods](https://agentmods.dev/badge/commands/punt-labs/quarry/learn-dev.svg)](https://agentmods.dev/commands/punt-labs/quarry/learn-dev)
Your own site
<a href="https://agentmods.dev/commands/punt-labs/quarry/learn-dev"><img src="https://agentmods.dev/badge/commands/punt-labs/quarry/learn-dev.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 182 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 $0.00031 $0.00182
Opus 5 $0.00015 $0.00091
Sonnet 5 $0.00006 $0.00036
Haiku 4.5 $0.00003 $0.00018

Measured yesterday against content hash 632fea85037f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

learn-dev 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 yesterday.

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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • learn — 91% identical, 2 lines differ
plugin/commands/learn-dev.md · 23 lines

What it actually says

Input

Arguments: $ARGUMENTS

If the arguments end with " as <name>", the text before that clause is the lesson and <name> is the name. Otherwise the full argument string is the lesson and no name is given.

Task

Call mcp__quarry-dev__learn with:

  • lesson set to the lesson text
  • name set to the parsed name, if any

The result is already formatted by a PostToolUse hook and displayed above. Do not repeat or reformat the data. Do not send any text after the tool call.

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. yesterday First seen · 23 lines · 31 tokens per session scan A 632fea85037f

Subscribe to this mod's changes

learn-dev is a command published in the GitHub repository punt-labs/quarry (3 stars, last pushed 2d ago), licensed MIT. It adds 31 tokens to every session and 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 2026-09-05.