Agent skill

Deck Build

by iancooper in iancooper/practical-messaging

Build the Practical Messaging .pptx decks from outlines/ — the house Markdown grammar, what builddeck.py does with each block, how figures and photographs are laid out, and how to answer an overflow.

No licenceAuto-check passedDocuments & Office

Install Deck Build

skills CLI
$ npx skills add iancooper/practical-messaging --skill deck-build -a claude-code

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

GitHub CLI
$ gh skill install iancooper/practical-messaging deck-build --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/iancooper/practical-messaging.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/deck-build .claude/skills/deck-build && 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
deck-build
GitHub stars
101
Token cost
~3.8k tokens
SKILL.md length
2,202 words
Files
1
Skills in repo
3
Repo updated
First seen
Licence
None found

At a glance

Build the Practical Messaging .pptx decks from outlines/ — the house Markdown grammar, what builddeck.py does with each block, how figures and photographs are laid out, and how to answer an overflow.

  • Works in 4 steps: ⚑ Soft wrapping means a line is not a… → ⚑ #note: runs to the blank line, not to… → #note: is stripped and Presenter notes:… → …
  • Editing outlines/DayOne.md
  • SKILL.md covers The grammar, What the builder does, Three things the .pptx does… and Finding a slide by its number, plus 4 more sections
  • Calls python3 and git

What it does

Deck Build is an agent skill from iancooper/practical-messaging. Build the Practical Messaging .pptx decks from outlines/ — the house Markdown grammar, what builddeck.py does with each block, how figures and photographs are laid out, and how to answer an overflow. Use when editing outlines/DayOne.md or DayTwo.md, changing tools/builddeck.py or tools/outline.py, adding or moving a slide, wiring an

Its SKILL.md is about 3.8k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Documents & Office, covering PowerPoint presentations and Slides and decks. It works with Microsoft PowerPoint.

When your agent uses it

  • Editing outlines/DayOne.md
  • Changing tools/builddeck.py
  • Tools/outline.py

Example prompts

  • “/deck-build”

Requirements

  • Python 3

Workflow steps

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

  1. ⚑ Soft wrapping means a line is not a block. The outlines are written to a ~110-column
  2. ⚑ #note: runs to the blank line, not to the end of its own line. Skipping only the
  3. #note: is stripped and Presenter notes: is kept. That asymmetry is the whole of rule
  4. Anchor a cut on '\n## X\n'. Section headings recur inside prose in backticks

What it can do on your machine

Read from SKILL.md and the folder at commit 5d0ea23. 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

    Shell commands in SKILL.md call:

    • python3
    • git

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

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    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

Deck Build loads about 3.8k tokens when it runs. Until then it costs about 87 tokens; SKILL.md has 2,202 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~87
When it runs · the whole SKILL.md, loaded when a task matches
~3.8k

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

Without a licence we can't republish the file, so here is its outline and opening line. It has 2,202 words (~3,770 tokens).

“outlines/*.md → tools/outline.py (grammar) → tools/build_deck.py (styles.md) → build/*.pptx and build/preview/*.png.”

— opening of SKILL.md by iancooper
name
deck-build

Read the full SKILL.md on GitHub

Files

Just SKILL.md in .claude/skills/deck-build of iancooper/practical-messaging.

Open the folder on GitHubat commit 5d0ea23

Compare with similar skills

Deck Build 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.

Deck Build compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Deck Build this skilliancooper/practical-messaging101—~3.8kAutomated safety check: PassNone
Image To Editable Pptningzimu/image-to-editable-ppt-skill2.8k—~4.3kAutomated safety check: PassMIT
Slidesfcakyon/claude-codex-settings1.2k1 repos~1.1kAutomated safety check: PassMIT
Ppt Image FirstNyxTides/ppt-image-first1.2k—~1.6kAutomated safety check: PassApache-2.0
Gpt Image2 PptJuneYaooo/gpt-image2-ppt-skills1.3k—~8.9kAutomated safety check: NotesApache-2.0
HTML Slide To PPTXmucsbr/ppt-agent-workflow-san643—~1.1kAutomated safety check: PassNone

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Questions about Deck Build

What does Deck Build do?

Build the Practical Messaging .pptx decks from outlines/ — the house Markdown grammar, what builddeck.py does with each block, how figures and photographs are laid out, and how to answer an overflow. Deck Build is an agent skill from iancooper/practical-messaging.py does with each block, how figures and photographs are laid out, and how to answer an overflow.

When should I use Deck Build?

Deck Build fits situations like: editing outlines/DayOne.md; changing tools/builddeck.py; tools/outline.py.

How do I install Deck Build in Claude Code?

Run `npx skills add iancooper/practical-messaging --skill deck-build -a claude-code`. Or copy the skill folder (.claude/skills/deck-build in iancooper/practical-messaging) into .claude/skills/deck-build in your project. Claude Code loads it when a task matches its description.

How do I install Deck Build in Codex?

Run `npx skills add iancooper/practical-messaging --skill deck-build -a codex`. Or copy the skill folder (.claude/skills/deck-build in iancooper/practical-messaging) into .agents/skills/deck-build in your project. Codex loads it when a task matches its description.

Can I use Deck Build 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 iancooper/practical-messaging --skill deck-build -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/deck-build, .gemini/skills/deck-build, .github/skills/deck-build and .opencode/skills/deck-build in your project.

What does Deck Build need to run?

Going by SKILL.md and its folder, Deck Build needs the command-line tools its instructions call (python3 and git). Our summary lists: Python 3.

Does Deck Build access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Deck Build 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 Deck Build use?

No licence was found for Deck Build or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.

How many tokens does Deck Build use?

About 3.8k tokens (SKILL.md is roughly 15k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Deck Build?

Skills that share tags, products or a category with Deck Build: Image To Editable Ppt (ningzimu/image-to-editable-ppt-skill, 2.8k stars), Slides (fcakyon/claude-codex-settings, 1.2k stars), Ppt Image First (NyxTides/ppt-image-first, 1.2k stars) and Gpt Image2 Ppt (JuneYaooo/gpt-image2-ppt-skills, 1.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Deck Build?

iancooper (a GitHub user) maintains it in iancooper/practical-messaging, which has 101 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on September 13, 2026.

Source: iancooper/practical-messaging on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.