Claude Code Guide is a reference collection for configuring and using Claude Code, Anthropic’s command-line coding agent. Developers use it to learn commands, skills, agents, MCP, automation, security, integrations, and troubleshooting. Its catalogue add-ons provide many of the documented skills and agents.
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 agentmods add skills/zebbern/claude-code-guide/timeline-buildernpx skills add zebbern/claude-code-guide --skill timeline-buildergit clone --depth 1 https://github.com/zebbern/claude-code-guideWrote 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/zebbern/claude-code-guide/timeline-builder)<a href="https://agentmods.dev/skills/zebbern/claude-code-guide/timeline-builder"><img src="https://agentmods.dev/badge/skills/zebbern/claude-code-guide/timeline-builder.svg" alt="Measured on agentmods" 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 | $0.00074 | $0.00883 |
| Opus 5 | $0.00037 | $0.00441 |
| Sonnet 5 | $0.00015 | $0.00177 |
| Haiku 4.5 | $0.00007 | $0.00088 |
Grade A, and why
timeline-builder 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 yesterday.
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.
How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Timeline Builder
Generate beautiful interactive timeline HTML pages from JSON configuration data, with three layout modes:
- Vertical layout (
vertical) — A classic top-to-bottom timeline with event cards alternating on either side of the axis - Horizontal layout (
horizontal) — A horizontally scrollable timeline, best for displaying fewer events - Dual-side layout (
dual-side) — Events are placed on the left or right based on thesidefield, great for side-by-side comparisons
All layouts support:
- Click to expand/collapse event details
- Mobile-friendly responsive design
- Custom theme colors, icons, and category labels
- Pure static HTML with zero dependencies — opens directly in any browser
Usage
Basic: Generate from a JSON config file
python3 scripts/generate_timeline.py --config timeline_data.json --output timeline.html
Read JSON from stdin
cat timeline_data.json | python3 scripts/generate_timeline.py --stdin --output timeline.html
Override layout mode (takes precedence over config file)
python3 scripts/generate_timeline.py --config data.json --layout horizontal --output timeline.html
JSON Configuration Format
{
"title": "Project Milestones",
"layout": "vertical",
"theme": {
"primaryColor": "#2563eb",
"secondaryColor": "#7c3aed",
"backgroundColor": "#ffffff",
"textColor": "#1f2937",
"lineColor": "#d1d5db",
"fontFamily": "system-ui, -apple-system, sans-serif"
},
"events": [
{
"date": "2024-01-15",
"title": "Project Kickoff",
"summary": "Approval completed, core team assembled",
"details": "Detailed description text, shown when the card is expanded...",
"icon": "🚀",
"category": "Milestone",
"color": "#10b981",
"side": "left"
}
]
}
CLI Arguments
| Argument | Description |
|---|---|
--config, -c |
Path to the JSON config file (mutually exclusive with --stdin) |
--stdin |
Read JSON from standard input |
--output, -o |
Output HTML file path (defaults to stdout) |
--layout, -l |
Override layout mode: vertical, horizontal, dual-side |
--title, -t |
Override the timeline title |
What ships with it
2 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.
- yesterday First seen · 107 lines · 74 tokens per session scan A 81d364265779
timeline-builder is a skill published in the GitHub repository zebbern/claude-code-guide (4,600 stars, last pushed yesterday), licensed MIT. It adds 74 tokens to every session and 883 once invoked, about $0.0004 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 2026-09-03.
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