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 mhattingpete/claude-skills-marketplace --skill timeline-creatorgit clone --depth 1 https://github.com/mhattingpete/claude-skills-marketplaceWrote 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/mhattingpete/claude-skills-marketplace/timeline-creator)<a href="https://agentmods.dev/skills/mhattingpete/claude-skills-marketplace/timeline-creator"><img src="https://agentmods.dev/badge/skills/mhattingpete/claude-skills-marketplace/timeline-creator/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/mhattingpete/claude-skills-marketplace/timeline-creator"><img src="https://agentmods.dev/badge/skills/mhattingpete/claude-skills-marketplace/timeline-creator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00047 | $0.00513 |
| Opus 5 | $0.00023 | $0.00257 |
| Sonnet 5 | $0.00009 | $0.00103 |
| Haiku 4.5 | $0.00005 | $0.00051 |
Grade A, and why
timeline-creator 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 13d 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.
What it actually says
Timeline Creator
Create interactive HTML timelines and project roadmaps with Gantt charts and milestones.
When to Use
- "Create timeline for [project]"
- "Generate roadmap for Q1-Q4"
- "Make Gantt chart for schedule"
- "Show project milestones"
Components
- Timeline Header: project name, date range, completion %
- Phase Groups: Q1, Q2, Q3, Q4 or custom phases
- Timeline Items: tasks with start/end dates, progress, status
- Milestones: key deliverables with dates
- Gantt Visualization: horizontal bars showing duration
HTML Structure
<!DOCTYPE html>
<html>
<head>
<title>[Project] Timeline</title>
<style>
body { font-family: system-ui; max-width: 1400px; margin: 0 auto; }
.timeline-bar { background: linear-gradient(90deg, #4299e1, #48bb78); height: 20px; border-radius: 4px; }
.milestone { border-left: 3px solid #e53e3e; padding-left: 10px; }
/* Status colors: #48bb78 (done), #4299e1 (in-progress), #718096 (planned) */
</style>
</head>
<body>
<h1>[Project] Timeline</h1>
<!-- Phase sections with timeline bars -->
<!-- Milestones list -->
</body>
</html>
Timeline Bar Pattern
<div class="timeline-item">
<span>Task Name</span>
<div class="timeline-bar" style="width: [percentage]%; background: [status-color];"></div>
<span>[start] - [end]</span>
</div>
Workflow
- Extract tasks, dates, phases from project
- Calculate duration percentages
- Group by phases (quarters or custom)
- Create HTML with Gantt-style bars
- Add milestones section
- Write to
[project]-timeline.html
Use semantic colors for status, keep layout responsive.
What ships with it
4 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.
- 13d ago First seen · 67 lines · 47 tokens per session scan A b74e45f70ccf
timeline-creator is a skill published in the GitHub repository mhattingpete/claude-skills-marketplace (671 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 47 tokens to every session and 513 once invoked, about $0.0002 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 2026-08-30.
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