Agent skill

Codex Slides Browser

by nexu-io in nexu-io/codex-slides

Compatibility entry point for opening and operating Codex Slides in Codex's in-editor Browser, including scenario selection, Design Files, brand systems, decks, and Play mode.

MITAuto-check passedDocuments & Office

Install Codex Slides Browser

skills CLI
$ npx skills add nexu-io/codex-slides --skill codex-slides-browser -a claude-code

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

GitHub CLI
$ gh skill install nexu-io/codex-slides codex-slides-browser --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/nexu-io/codex-slides.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/codex-slides-browser .claude/skills/codex-slides-browser && 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
codex-slides-browser
GitHub stars
928
Token cost
~685 tokens
SKILL.md length
324 words
Files
2
Skills in repo
7
Repo updated
First seen
Licence
MIT

At a glance

Compatibility entry point for opening and operating Codex Slides in Codex's in-editor Browser, including scenario selection, Design Files, brand systems, decks, and Play mode.

  • Works in 6 steps: Call open_codex_slides when the MCP tool… → Navigate the returned resource link in… → For a new deck, always open and verify… → …
  • The user asks to open
  • Calls node
  • Directly manipulate Codex Slides

What it does

Codex Slides Browser is an agent skill from nexu-io/codex-slides. Compatibility entry point for opening and operating Codex Slides in Codex's in-editor Browser, including scenario selection, Design Files, brand systems, decks, and Play mode. Use when the user asks to open, launch, preview, view, play, inspect, or directly manipulate Codex Slides or a deck without leaving Codex.

Its SKILL.md is about 690 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `agents/openai.yaml`).

It sits in Documents & Office, covering Slides and decks and Design systems. It works with Microsoft PowerPoint. The repository describes itself as: 🎨 Open-source AI slide studio inside Codex: image-native decks, every slide a full visual canvas. ⚡ 10+ high-quality slides in ~4–5 minutes — Fast mode renders every page in… The licence is MIT.

When your agent uses it

  • The user asks to open
  • Directly manipulate Codex Slides
  • A deck without leaving Codex

Example prompts

  • “/codex-slides-browser”

Workflow steps

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

  1. Call open_codex_slides when the MCP tool is available. Otherwise run
  2. Navigate the returned resource link in the Codex in-editor Browser. Do not
  3. For a new deck, always open and verify the home/create screen before any
  4. Keep the Browser visible and operate the checkpoints in order: clarify,
  5. Use direct MCP tools or the canonical skill CLI for deterministic recovery
  6. Verify the visible outcome before reporting completion.

What it can do on your machine

Read from SKILL.md and the folder at commit dbc2a59. 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:

    • node

    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

Codex Slides Browser loads about 685 tokens when it runs. Until then it costs about 84 tokens; SKILL.md has 324 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~84
When it runs · the whole SKILL.md, loaded when a task matches
~685

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 nexu-io/codex-slides at commit dbc2a59, republished under its MIT licence (© nexu-io). 324 words, ~685 tokens.

Download SKILL.mdSave it as .claude/skills/codex-slides-browser/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
codex-slides-browser
description
Compatibility entry point for opening and operating Codex Slides in Codex's in-editor Browser, including scenario selection, Design Files, brand systems, decks, and Play mode. Use when the user asks to open, launch, preview, view, play, inspect, or directly manipulate Codex Slides or a deck without leaving Codex.

Codex Slides Browser

This specialized skill remains for compatibility. The canonical codex-slides sibling skill owns the full workflow and portable CLI.

  1. Call open_codex_slides when the MCP tool is available. Otherwise run node ../codex-slides/scripts/codex-slides.mjs open --json '<input>' from this skill directory. Pass projectId when the user named a deck; otherwise omit it for the create workspace. Use view:"scenarios" for the 24-workflow catalog, view:"design-files" plus projectId and optional filePath for project files, or view:"brand-system" plus projectId for the brand editor.
  2. Navigate the returned resource link in the Codex in-editor Browser. Do not stop after printing the URL and do not ask the user to open it manually. Follow browserHandoff.url exactly so slide, panel, version, mode, checkpoint, conversation, and run focus are preserved.
  3. For a new deck, always open and verify the home/create screen before any research, outline, or rendering call. Submit the topic in that UI so it creates a durable project and opens the guided workspace. Use start_project / CLI start-project only if UI submission needs a deterministic fallback, then navigate its project resource immediately.
  4. Keep the Browser visible and operate the checkpoints in order: clarify, outline review, inspiration/style selection, render, deck review. Do not run the entire workflow invisibly in the Codex conversation.
  5. Use direct MCP tools or the canonical skill CLI for deterministic recovery and mutations, then reload or inspect the Browser result.
  6. Verify the visible outcome before reporting completion.

Long Deck Agent, outline, and render operations can continue after navigation. Use start_project_run, retain its runId, and use get_project_run, wait_project_run, or cancel_project_run without closing the Browser.

Use the Browser for scenario/slot selection, @ Design File references, brand system editing, Play from the current slide or the beginning, dual-window presenter mode, speaker notes editing/AI generation, slide navigation, direct on-canvas marking, layout inspection, and other visual interactions. If the Browser capability is unavailable in the current Codex surface, return the resource link and explain that limitation rather than claiming it opened.

© nexu-io, MIT. 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 1 other file in skills/codex-slides-browser of nexu-io/codex-slides.

  • SKILL.md
  • agents/openai.yaml

Open the folder on GitHubat commit dbc2a59

Compare with similar skills

Codex Slides Browser 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.

Codex Slides Browser compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Codex Slides Browser this skillnexu-io/codex-slides928—~685Automated safety check: PassMIT
Slidesnexu-io/open-design100k—~287Automated safety check: PassApache-2.0
Brand Voice Generatorcoleam00/second-brain-skills832—~2.5kAutomated safety check: PassNone
Data Viz Deckthatrebeccarae/claude-marketing162—~1.8kAutomated safety check: PassMIT
Baoyu DesignDejavuMoe/Smoji1141 repos~2.7kAutomated safety check: PassMIT
Image To Editable Pptningzimu/image-to-editable-ppt-skill2.8k—~4.3kAutomated safety check: PassMIT

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  • Codex Slides Research

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Questions about Codex Slides Browser

What does Codex Slides Browser do?

Compatibility entry point for opening and operating Codex Slides in Codex's in-editor Browser, including scenario selection, Design Files, brand systems, decks, and Play mode. Codex Slides Browser is an agent skill from nexu-io/codex-slides. Compatibility entry point for opening and operating Codex Slides in Codex's in-editor Browser, including scenario selection, Design Files, brand systems, decks, and Play mode.

When should I use Codex Slides Browser?

Codex Slides Browser fits situations like: the user asks to open; directly manipulate Codex Slides; A deck without leaving Codex.

How do I install Codex Slides Browser in Claude Code?

Run `npx skills add nexu-io/codex-slides --skill codex-slides-browser -a claude-code`. Or copy the skill folder (skills/codex-slides-browser in nexu-io/codex-slides) into .claude/skills/codex-slides-browser in your project. Claude Code loads it when a task matches its description.

How do I install Codex Slides Browser in Codex?

Run `npx skills add nexu-io/codex-slides --skill codex-slides-browser -a codex`. Or copy the skill folder (skills/codex-slides-browser in nexu-io/codex-slides) into .agents/skills/codex-slides-browser in your project. Codex loads it when a task matches its description.

Can I use Codex Slides Browser 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 nexu-io/codex-slides --skill codex-slides-browser -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/codex-slides-browser, .gemini/skills/codex-slides-browser, .github/skills/codex-slides-browser and .opencode/skills/codex-slides-browser in your project.

What does Codex Slides Browser need to run?

Going by SKILL.md and its folder, Codex Slides Browser needs the command-line tools its instructions call (node).

Does Codex Slides Browser 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 Codex Slides Browser 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 Codex Slides Browser use?

Codex Slides Browser is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Codex Slides Browser use?

About 685 tokens (SKILL.md is roughly 2.7k 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 Codex Slides Browser?

Skills that share tags, products or a category with Codex Slides Browser: Slides (nexu-io/open-design, 100k stars), Brand Voice Generator (coleam00/second-brain-skills, 832 stars), Data Viz Deck (thatrebeccarae/claude-marketing, 162 stars) and Baoyu Design (DejavuMoe/Smoji, 114 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Codex Slides Browser?

nexu-io (a GitHub organization) maintains it in nexu-io/codex-slides, which has 928 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on July 21, 2026.

Source: nexu-io/codex-slides on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.