Claude Code Viewer is a web client for managing Claude Code projects, including starting or resuming conversations, monitoring tasks, and browsing session history. Its catalogue entries provide skills, commands, hooks, instructions, and settings that extend the client’s workflow.
Borrowing it
Nothing to install: this file belongs to d-kimuson/claude-code-viewer. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/d-kimuson/claude-code-viewer/main/AGENTS.mdgit clone --depth 1 https://github.com/d-kimuson/claude-code-viewerWrote 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.
[](https://agentmods.dev/instructions/d-kimuson/claude-code-viewer/agents-md)<a href="https://agentmods.dev/instructions/d-kimuson/claude-code-viewer/agents-md"><img src="https://agentmods.dev/badge/instructions/d-kimuson/claude-code-viewer/agents-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.
<a href="https://agentmods.dev/instructions/d-kimuson/claude-code-viewer/agents-md"><img src="https://agentmods.dev/badge/instructions/d-kimuson/claude-code-viewer/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.01507 | $0.01507 |
| Opus 5.5 | $0.00603 | $0.00603 |
| Sonnet 5.5 | $0.00301 | $0.00301 |
| Haiku 4.5 | $0.00151 | $0.00151 |
Grade A, and why
claude-code-viewer AGENTS.md scanned grade A with 1 finding 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.
Runs shell commandslowCapability
Expected in a hook, worth knowing in a rule or an instructions file.
- Use `Command.string` instead of `child_process` Copies of this mod
1 near-identical copy found in the catalogue:
- claude-code-viewer CLAUDE.md — 89% identical, 14 lines differ
How it starts
The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Critical Rules (Read First)
Language:
- Code, comments, and commit messages should be in English
NEVER:
- Use
astype casting in ANY context including test code (explain the problem to the user instead) - Use raw
fetchor bypass TanStack Query for API calls - Run
pnpm devorpnpm start(dev servers) - Use
node:fs,node:path, etc. directly (use Effect-TS equivalents)
ALWAYS:
- Use Effect-TS for all backend side effects
- Use Hono RPC + TanStack Query for all API calls
- Follow TDD: write tests first, then implement
- Run
pnpm typecheckandpnpm fixbefore committing
Commit Message Rules
Conventional Commits format: type: description
Release Note Awareness:
- Commit messages are included in release notes; write for users.
Type Selection:
| Type | Release Note | Purpose |
|---|---|---|
feat |
Features | User-facing new feature |
fix |
Bug Fixes | User-impacting bug fix |
chore, ci, build, refactor |
Excluded | Internal changes |
Critical: Use fix only for user-facing bugs. Internal fixes (linter errors, type errors, build scripts) must use chore.
Message Quality Examples:
- Bad:
fix: fix lingui error(internal issue) - Bad:
feat: add button(too vague) - Good:
feat: add dark mode toggle to settings - Good:
fix: session list not updating after deletion - Good:
chore: update lingui compiled messages
Project Overview
Claude Code Viewer reads Claude Code session logs directly from JSONL files (~/.claude/projects/) with zero data loss. It's a web-based client built as a CLI tool serving a Vite application.
Core Architecture:
- Frontend: Vite + TanStack Router + React 19 + TanStack Query
- Backend: Hono (standalone server) + Effect-TS (all business logic)
- Data: Direct JSONL reads with strict Zod validation
- Real-time: Server-Sent Events (SSE) for live updates
Recommended Coding Process
This project is designed with the philosophy of achieving both rapid feedback and code quality maintenance (passing checks = nearly guaranteed runtime correctness) by leveraging:
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.
- 1mo ago First seen · 187 lines · 1,507 tokens per session scan A 32b5bbe52ce1
claude-code-viewer AGENTS.md is an instructions file published in the GitHub repository d-kimuson/claude-code-viewer (1,300 stars, last pushed 2mo ago), licensed MIT. It adds 1,507 tokens to every session, about $0.0060 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deno copilot-instructions.md
Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.