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.
npx skills add joonlab/joonlab-claudecode-setting-for-share --skill claude-history-viewergit clone --depth 1 https://github.com/joonlab/joonlab-claudecode-setting-for-shareWrote 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/skills/joonlab/joonlab-claudecode-setting-for-share/claude-history-viewer)<a href="https://agentmods.dev/skills/joonlab/joonlab-claudecode-setting-for-share/claude-history-viewer"><img src="https://agentmods.dev/badge/skills/joonlab/joonlab-claudecode-setting-for-share/claude-history-viewer/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/skills/joonlab/joonlab-claudecode-setting-for-share/claude-history-viewer"><img src="https://agentmods.dev/badge/skills/joonlab/joonlab-claudecode-setting-for-share/claude-history-viewer.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 | $0.00099 | $0.04041 |
| Opus 5 | $0.00049 | $0.02021 |
| Sonnet 5 | $0.00020 | $0.00808 |
| Haiku 4.5 | $0.00010 | $0.00404 |
Grade A, and why
claude-history-viewer 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
**Cause:** Pure browser cache — the server is fine (`curl` always returns the full file). The list/search fetch `sessions-index.json?t=<Date.now()>` (cache-busted → always fresh), but the detail view fetches the raw `.js How it starts
The opening of the file, as written. The whole thing — 483 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code History Viewer
This skill guides the setup of a local web-based viewer for Claude Code conversation history. The viewer provides searchable, filterable access to all Claude Code sessions with features like tag management, session resume (iTerm2 integration), rename, delete, and markdown export.
Architecture Overview
┌─────────────────────────────────────────────────────────────┐
│ Web Browser │
│ (history-viewer.html) │
└─────────────────────────┬───────────────────────────────────┘
│ HTTP (fetch API)
▼
┌─────────────────────────────────────────────────────────────┐
│ FastAPI Server │
│ (history-server.py) │
│ ┌─────────────┬─────────────┬─────────────┬──────────────┐ │
│ │ /api/tags │ /api/rename │ /api/delete │ /api/resume │ │
│ └─────────────┴─────────────┴─────────────┴──────────────┘ │
└─────────────────────────┬───────────────────────────────────┘
│ File I/O
▼
┌─────────────────────────────────────────────────────────────┐
│ ~/.claude/ │
│ ┌──────────────────┐ ┌──────────────────┐ │
│ │ sessions-index.json │ │ session-tags.json │ │
│ │ session-names.json │ │ projects/ │ │
│ └──────────────────┘ └──────────────────┘ │
└─────────────────────────────────────────────────────────────┘
File Structure
~/.claude/
├── history-server.py # FastAPI backend server (main)
├── history-viewer.html # Frontend web page
├── update-index.py # Session index generation script
├── sessions-index.json # Session index (auto-generated)
├── session-tags.json # Tag data storage
├── session-names.json # Custom session name storage
├── session-descriptions.json # Session description storage
├── migrate-claude-project-paths.py # Session migration script
└── projects/ # Claude Code session files
└── <encoded-paths>/
└── *.jsonl
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 11d ago First seen · 483 lines · 99 tokens per session scan A 3555ed5b1dbe
claude-history-viewer is a skill published in the GitHub repository joonlab/joonlab-claudecode-setting-for-share (10 stars, last pushed 1mo ago), licensed MIT. It adds 99 tokens to every session and 4,041 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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