learn

A codebase-understanding command that maps a project's structure, builds a deeper knowledge graph, explains architecture, or guides a developer through the code.

In plain words
What is it for?
Use it to create a full understanding of a repository, inspect its architecture, compare changes, or get an onboarding tour.
Why use it?
It reduces the time spent figuring out unfamiliar code before making changes.

Command

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 commands/lookatitude/guild/learn
Clone the repo
git clone --depth 1 https://github.com/lookatitude/guild
Per session 135 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,063 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 $0.00135 $0.04063
Opus 5 $0.00068 $0.02031
Sonnet 5 $0.00027 $0.00813
Haiku 4.5 $0.00014 $0.00406

Measured 2d ago against content hash 020bd834d9de, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 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.

commands/learn.md · 298 lines

How it starts

The opening of the file, as written. The whole thing — 298 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/guild:learn — understand-everything

The single entry-point for all codebase-understanding capabilities. A thin dispatcher over the learn-* skill family (guild:learn-map, learn-graph, learn-onboard, learn-diff, learn-explain) AND the smart full learn-all path.

One implementation, two triggers (D3): the pipeline this command runs is byte-identical to what /guild:init --learn and defaults.auto_learn: true invoke. There is no separate codebase-understanding engine.

Sub-verbs are positional ARGUMENTS (D3 — one implementation, two triggers). Full command reference: https://guildstack.dev/docs.


Usage

/guild:learn                              smart full learn-all (detect + confirm + pipeline)
/guild:learn map                          CodebaseMap + architecture overview only
/guild:learn graph                        Deep semantic KnowledgeGraph only
/guild:learn graph --rigor=deep           Deep graph, highest fidelity
/guild:learn knowledge                    Deep multi-modal knowledge tier (topics + wiki/diagram index + cross-modal links)
/guild:learn onboard                      Guided architecture tour only
/guild:learn diff                         Change analysis vs HEAD only
/guild:learn diff src/auth/               Change analysis scoped to path
/guild:learn explain src/billing/invoice.ts
/guild:learn explain "how does the auth flow work"

All five global flags + --dry-run apply. --rigor=deep runs the highest-fidelity graph/analysis pass.


No-arg form — smart full learn-all

/guild:learn with no sub-verb triggers the smart full learn-all path. This is the core correction from the brief (learn-knowledge-convergence §"Core Correction"): absent arguments mean "learn this workspace or project completely," NOT "missing argument, print usage, stop."

Read the full file on GitHub · 298 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 · 298 lines · 135 tokens per session scan A 020bd834d9de

Subscribe to this mod's changes

learn is a command published in the GitHub repository lookatitude/guild (7 stars, last pushed 2d ago), licensed MIT. It adds 135 tokens to every session and 4,063 once invoked, about $0.0007 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 2026-08-31.