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PPTX Slide Specification

Seth HobsonCommunityCreated by kimtthDistributed by Seth Hobson

  • Skill
  • Content generator
  • Documents and content
  • MIT
  • No issues found
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From the author

Use when authoring or repairing a coordinate-explicit JSON specification for an editable PPTX deck.
— the description by kimtth

AutoGineer summary

Written by AutoGineer from the skill’s own files, not by the author

This skill provides a strict structural contract for defining PowerPoint presentations via JSON. It mandates absolute positioning, explicit bounding boxes, and consistent layout policies to ensure that generated decks are fully editable and visually predictable. By treating the JSON layout tree as an audit contract rather than a suggestion, it prevents rendering engines from making arbitrary layout decisions.

What it does

  • Defines a JSON schema for PPTX slide structure, including metadata, accessibility, and layout trees.
  • Enforces absolute coordinate-based positioning for all slide objects.
  • Provides rules for maintaining safe margins, footer rails, and consistent z-indexing.
  • Sets minimum standards for text legibility and object classification.
  • Offers a systematic repair order for fixing layout issues or dense content.
  • Requires explicit declaration of slide size, object styles, and reading order.

When to use it

  • When you need to generate a programmatically editable PPTX deck from data.
  • When you are debugging or repairing a JSON specification that results in poor slide layout.
  • When you need to ensure consistent branding and spacing across a large presentation.
  • When you are building a tool that maps data to specific slide coordinates.

Advantages

  • Ensures full editability of the resulting PPTX file.
  • Eliminates layout drift caused by automatic rendering adjustments.
  • Provides a clear, audit-ready contract for presentation structure.
  • Promotes accessibility through explicit reading order and metadata.

Usage examples

“How should I structure the JSON for a new slide in my PPTX specification?”
The agent provides a template containing the required slide ID, title, accessibility reading order, and a layout_tree object with absolute bbox coordinates.
“My slide content is overlapping the footer; how do I fix this using the layout contract?”
The agent guides you to adjust the bbox y-coordinates to respect the content_bottom and footer_top constraints defined in the layout_policy.

Install

  1. Download the skill as a ZIP:

    https://mp-staging.autogineer.com/agent-skills/wshobson/pptx-slide-specification/download

  2. Unzip it into the cross-client skills folder of your project:

    mkdir -p .agents/skills && unzip pptx-slide-specification.zip -d .agents/skills

Documentation by kimtth

PPTX Slide Specification

Author final coordinates directly in layout_tree. No renderer may decide placement, shrink text, or infer layout after the audit.

Required contract

  • The root JSON contains summary and slides.

  • Every slide has a stable id, a message-led title, an accessibility reading order, and a complete layout_tree.

  • A layout tree declares slide size, root group, id-keyed groups and objects, final inch bboxes, styles, z-indexes, and classifications.

  • Every meaningful object has id, kind, role, classification, content, style, bbox, and z_index.

  • Production summary contains an explicit layout_policy (safe margin, content bottom, footer top, minimum gap) and accessibility metadata.

Authoring rules

  1. Use stable readable IDs, absolute groups, and positive inch dimensions.

  2. Keep normal content inside the safe margin and above the footer rail. Only background layout_design objects may be full bleed.

  3. Use native text, shape, line, table, and image objects. Recreate labels and values from any supporting visual as native objects.

  4. Give meaningful images alt text. Record source_ref for sourced claims.

  5. Keep content text at 9 pt or greater; shorten, resize, or split dense content before reducing type.

  6. Use shared grids, consistent gaps, explicit color, explicit font size, and an intentional z-order.

Build contract

A task-local builder starts from a blank slide layout and maps all bboxes with Inches(...). Explicitly set wrapping, disabled auto-size, text insets, anchors, alignment, fonts, colors, line settings, image aspect ratio, and hidden-slide state. Reject zero or negative geometry before adding an object.

See references/layout-contract.md for the compact schema and repair guidance.

Files

LICENSE

MIT License

Copyright (c) 2024 Seth Hobson

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Requirements and compatibility

Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta

“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.

Security

No issues found by our static scan· No issues found

A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.

Attribution and licence

Created by
kimtth
Publisher
Seth Hobson (Community)
Distributed by
Seth Hobson
Source
wshobson/agents · plugins/pptx-deck-creation/skills/pptx-slide-specification · commit 4bde316
Licence
MIT License (redistribution allowed)
  • LICENSE (added by AutoGineer from LICENSE)
  • ATTRIBUTION.md (written by AutoGineer)
Synced

AutoGineer is not affiliated with or endorsed by kimtth or Seth Hobson.

Download ZIP

The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download pptx-slide-specification.zip