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Agent skill

Timeline Creator

by mhattingpete in mhattingpete/claude-skills-marketplace

Create HTML timelines and project roadmaps with Gantt charts, milestones, phase groupings, and progress indicators.

Apache-2.0Auto-check passedProduct & Project Management

Install Timeline Creator

skills CLI
$ npx skills add mhattingpete/claude-skills-marketplace --skill timeline-creator -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mhattingpete/claude-skills-marketplace timeline-creator --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mhattingpete/claude-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/visual-documentation-plugin/skills/timeline-creator .claude/skills/timeline-creator && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
timeline-creator
GitHub stars
680
Token cost
~482 tokens
SKILL.md length
120 words
Files
5 (incl. references, assets)
Skills in repo
16
Repo updated
First seen
Licence
Apache-2.0

At a glance

Create HTML timelines and project roadmaps with Gantt charts, milestones, phase groupings, and progress indicators.

  • Works in 5 steps: Timeline Header: project name, date… → Phase Groups: Q1, Q2, Q3, Q4 or custom… → Timeline Items: tasks with start/end… → …
  • Users request timelines
  • SKILL.md covers When to Use, Components, HTML Structure and Timeline Bar Pattern, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Timeline Creator is an agent skill from mhattingpete/claude-skills-marketplace. Create HTML timelines and project roadmaps with Gantt charts, milestones, phase groupings, and progress indicators. Use when users request timelines, roadmaps, Gantt charts, project schedules, or milestone visualizations.

Its SKILL.md is about 480 tokens, which your agent loads only when the skill is triggered. The skill folder holds 7 other files, including reference files and assets (for example `references/design_patterns.md` and `references/svg_library.md`).

It sits in Product & Project Management, covering Project management. The repository describes itself as: Claude Code Skills for software engineering workflows - Git automation, testing, and code review. The licence is Apache-2.0.

When your agent uses it

  • Users request timelines
  • Project schedules
  • Milestone visualizations

Example prompts

  • “/timeline-creator”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Timeline Header: project name, date range, completion %
  2. Phase Groups: Q1, Q2, Q3, Q4 or custom phases
  3. Timeline Items: tasks with start/end dates, progress, status
  4. Milestones: key deliverables with dates
  5. Gantt Visualization: horizontal bars showing duration

What it can do on your machine

Read from SKILL.md and the folder at commit b5b34bc. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are html).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Timeline Creator loads about 482 tokens when it runs, and up to ~7.6k if it reads all its reference files. Until then it costs about 60 tokens; SKILL.md has 120 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~60
When it runs · the whole SKILL.md, loaded when a task matches
~482
With references · SKILL.md plus every file in references/, read only if the agent opens them
~7.6k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mhattingpete/claude-skills-marketplace at commit b5b34bc, republished under its Apache-2.0 licence (© mhattingpete). 120 words, ~482 tokens.

Download SKILL.mdSave it as .claude/skills/timeline-creator/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.
name
timeline-creator
description
Create HTML timelines and project roadmaps with Gantt charts, milestones, phase groupings, and progress indicators. Use when users request timelines, roadmaps, Gantt charts, project schedules, or milestone visualizations.

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

  1. Timeline Header: project name, date range, completion %
  2. Phase Groups: Q1, Q2, Q3, Q4 or custom phases
  3. Timeline Items: tasks with start/end dates, progress, status
  4. Milestones: key deliverables with dates
  5. Gantt Visualization: horizontal bars showing duration

HTML Structure

html
<!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

html
<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

  1. Extract tasks, dates, phases from project
  2. Calculate duration percentages
  3. Group by phases (quarters or custom)
  4. Create HTML with Gantt-style bars
  5. Add milestones section
  6. Write to [project]-timeline.html

Use semantic colors for status, keep layout responsive.

© mhattingpete, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 4 other files (references, assets) in visual-documentation-plugin/skills/timeline-creator of mhattingpete/claude-skills-marketplace.

  • SKILL.md
  • assets/templates/base_template.html
  • assets/templates/timeline_components.html
  • references/design_patterns.md
  • references/svg_library.md

Open the folder on GitHubat commit b5b34bc

Compare with similar skills

Timeline Creator next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Timeline Creator compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Timeline Creator this skillmhattingpete/claude-skills-marketplace680—~482Automated safety check: PassApache-2.0
CCPM Project Managementautomazeio/ccpm8.4k—~1.1kAutomated safety check: PassMIT
Uvastral-sh/claude-code-plugins3132 repos~980Automated safety check: PassApache-2.0
Project Managementkunchenguid/firstmate7.7k—~2.1kAutomated safety check: PassMIT
Hivemind Goalsactiveloopai/hivemind1.6k—~1.7kAutomated safety check: NotesApache-2.0
Ichartjswanghetommy/ichartjs352—~4.3kAutomated safety check: PassApache-2.0

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Categories

Questions about Timeline Creator

What does Timeline Creator do?

Create HTML timelines and project roadmaps with Gantt charts, milestones, phase groupings, and progress indicators. Timeline Creator is an agent skill from mhattingpete/claude-skills-marketplace. Create HTML timelines and project roadmaps with Gantt charts, milestones, phase groupings, and progress indicators.

When should I use Timeline Creator?

Timeline Creator fits situations like: users request timelines; project schedules; milestone visualizations.

How do I install Timeline Creator in Claude Code?

Run `npx skills add mhattingpete/claude-skills-marketplace --skill timeline-creator -a claude-code`. Or copy the skill folder (visual-documentation-plugin/skills/timeline-creator in mhattingpete/claude-skills-marketplace) into .claude/skills/timeline-creator in your project. Claude Code loads it when a task matches its description.

How do I install Timeline Creator in Codex?

Run `npx skills add mhattingpete/claude-skills-marketplace --skill timeline-creator -a codex`. Or copy the skill folder (visual-documentation-plugin/skills/timeline-creator in mhattingpete/claude-skills-marketplace) into .agents/skills/timeline-creator in your project. Codex loads it when a task matches its description.

Can I use Timeline Creator in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mhattingpete/claude-skills-marketplace --skill timeline-creator -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/timeline-creator, .gemini/skills/timeline-creator, .github/skills/timeline-creator and .opencode/skills/timeline-creator in your project.

What does Timeline Creator need to run?

SKILL.md names no scripts, command-line tools or credentials: Timeline Creator is instructions for the agent only.

Does Timeline Creator access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Timeline Creator safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Timeline Creator use?

Timeline Creator is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Timeline Creator use?

About 482 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 7.1k tokens, read only when the agent opens those files.

What are the alternatives to Timeline Creator?

Skills that share tags, products or a category with Timeline Creator: CCPM Project Management (automazeio/ccpm, 8.4k stars), Uv (astral-sh/claude-code-plugins, 313 stars), Project Management (kunchenguid/firstmate, 7.7k stars) and Hivemind Goals (activeloopai/hivemind, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Timeline Creator?

mhattingpete (a GitHub user) maintains it in mhattingpete/claude-skills-marketplace, which has 680 GitHub stars. The repository holds 16 skills in this directory. The repository was last updated on July 25, 2026.

Source: mhattingpete/claude-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.