devlens

A codebase-inspection tool for projects written in TypeScript, JavaScript, Python, Go, Rust, or Java. It uses a prepared graph of code elements such as functions, classes, routes, and components.

In plain words
What is it for?
Finding components, hooks, functions, classes, methods, data types, and web routes across supported projects.
Why use it?
It helps locate how parts of an unfamiliar codebase connect without reading every file first.

Skill for Claude CodeCodex

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 skills/devlensio/devlensoss/devlens
Any agent
npx skills add devlensio/devlensOSS --skill devlens
Clone the repo
git clone --depth 1 https://github.com/devlensio/devlensOSS

Made for: Claude Code, Codex.

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,506 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00000 $0.03506
Opus 5 $0.00000 $0.01753
Sonnet 5 $0.00000 $0.00701
Haiku 4.5 $0.00000 $0.00351

Measured 2d ago against content hash ef9f169cbeed, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

devlens 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.

plugins/devlens/skills/devlens/SKILL.md · 118 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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 · 118 lines · 0 tokens per session scan A ef9f169cbeed

Subscribe to this mod's changes

devlens is a skill published in the GitHub repository devlensio/devlensOSS (55 stars, last pushed 10d ago), licensed AGPL-3.0. It costs nothing until one of its globs matches a file; then it loads 3,506 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 2026-08-30.