What is Lens CLAUDE.md?

Project instructions for Lens, an Electron desktop app that searches and resumes local Claude Code and OpenAI Codex session history.

They help developers run Lens locally, build releases for macOS, Windows, or Linux, inspect its architecture, and regenerate its icon.

They explain the project's structure and the commands needed to type-check, build, package, and check translations.

How maliming/Lens configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to maliming/Lens. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/maliming/Lens/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/maliming/Lens

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/maliming/lens/claude-md/github.svg)](https://agentmods.dev/instructions/maliming/lens/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/maliming/lens/claude-md"><img src="https://agentmods.dev/badge/instructions/maliming/lens/claude-md/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/maliming/lens/claude-md"><img src="https://agentmods.dev/badge/instructions/maliming/lens/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 5,458 This file is loaded in full into every session.

When invoked 5,458 The same file — it is already loaded in full.

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.

Model	Per session	Once invoked
Fable 5.1	$0.05458	$0.05458
Opus 5.5	$0.02183	$0.02183
Sonnet 5.5	$0.01092	$0.01092
Haiku 4.5	$0.00546	$0.00546

Measured 2mo ago against content hash 76a26232aee7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

Lens CLAUDE.md 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 2mo 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.

CLAUDE.md · 229 lines

How it starts

The opening of the file, as written. The whole thing — 229 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

What this is

Lens is an Electron desktop app that browses, searches, and resumes local Claude Code (~/.claude/projects/*.jsonl) and OpenAI Codex (~/.codex/sessions/**/*.jsonl) session history. The package name in package.json is lens.

Common commands

npm install
npm run dev          # Vite (http://localhost:5173) + Electron in parallel
npm run typecheck    # tsc --noEmit (run before any commit)
npm run check:i18n   # scripts/check-i18n.mjs — diffs each locale vs en
npm run build        # typecheck + Vite build → dist/  (does NOT package)
npm run preview      # run Electron against built dist/

npm run dist:mac     # release/Lens-<ver>-(arm64|x64).zip
npm run dist:win     # release/Lens-<ver>-win.zip
npm run dist:linux   # release/Lens-<ver>-linux-x86_64.AppImage

npm run build:icon   # regenerate build/icon.{icns,ico,png} from icon.svg
DEMO_BUILD=1 npm run dist:mac   # screenshot-ready build with fake data forced on

There are no tests and no linter configured. npm run build runs tsc --noEmit && vite build. npm run check:i18n is NOT in build — running it reveals real gaps (non-English locales miss ~200 keys each); wire to CI only after you've committed to translating, otherwise it'll fail every build.

Renderer hot-reloads under npm run dev. Main-process edits (electron/main.cjs) require a full restart — there is no main-process reload. Session cache manifests (sessions-cache-claude.json / sessions-cache-codex.json, plus bounded shards when a source exceeds the single-file limit) under the platform userData directory survive across restarts. Parser/cache schema changes require a versioned migration in electron/lib/sessions-cache.cjs; do not rely on manually deleting caches.

High-level architecture

Two-process boundary

electron/main.cjs (Node) — all filesystem IO, JSONL parsing, sub-process spawning (terminal launchers, claude/codex CLI probes), persistence (favorites.json / excludes.json / aliases.json / per-source session caches / app-prefs.json under app.getPath('userData')).
src/ (React 18 + TypeScript + Vite + Tailwind) — pure renderer. No Node access. Talks to main only via window.api.*.
electron/preload.cjs — contextBridge.exposeInMainWorld('api', ...). This is the IPC contract; any new feature that crosses the boundary needs an entry here + a matching ipcMain.handle in main.cjs + a typed signature in src/types.ts under declare global { interface Window { api: { ... } } }.

Read the full file on GitHub · 229 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.

2mo ago First seen · 229 lines · 5,458 tokens per session scan A 76a26232aee7

Subscribe to this mod's changes

Lens CLAUDE.md is an instructions file published in the GitHub repository maliming/Lens (15 stars, last pushed 1mo ago), licensed MIT. It adds 5,458 tokens to every session, about $0.0218 per session on Opus 5.5. 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.

Lens CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
Lens CLAUDE.mdmaliming/Lens	Instructions file	15	1mo ago	MIT	A	5,458	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

Lens: Instructions file for Claude Code