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Why pptx-designer?

More software is now written with an LLM in the loop. That makes the generated code—rather than an opaque prompt result—the useful unit of review, versioning, testing, and iteration. pptx-designer is a standard Python package built for that workflow: an assistant can compose explicit function calls, and a developer can inspect, modify, test, and rerun the same file.

It is deliberately not a presentation SaaS or a prompt-to-image black box. The output is a .pptx built from PowerPoint-native objects whenever the chosen component can express them.

Design choice	What it means in practice
Code is the source of truth	Layout, wording, colours, and data live in Python and can be reviewed in Git.
LLM-friendly public APIs	Small, named, composable helpers reduce ambiguity when code is generated or edited by an assistant.
Deterministic build path	The same inputs, package version, fonts, and runtime produce a repeatable build target.
Editable by default	Shapes, text, diagrams, and supported SVG elements are emitted as native PPT objects where possible.
Progressive control	Start with generate_ppt(); move to Build mode when a slide needs exact composition.
Optional AI services	Core layout and drawing do not require an API key; image generation/search is opt-in.

Scope and honest boundaries

pptx-designer adds a higher-level, presentation-oriented layer on top of python-pptx; it does not replace PowerPoint's rendering engine or implement every presentation/SVG feature. Native editability and visual fidelity depend on the component and target Office environment. The SVG compiler intentionally supports an editable subset, not browser-complete SVG. Treat generated PPTX files as build artifacts: open them in the target application and review important slides before delivery.

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Installation

pip install pptx-designer

Optional extras:

pip install pptx-designer[images]      # Stock photo search (Unsplash/Pexels)
pip install pptx-designer[ai-images]   # AI image generation (OpenAI, etc.)

Requirements: Python 3.10+

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Quick Start

A code-first slide

When an AI coding assistant generates PPT code, it produces:

from pptx_designer.tools.shapes import rect
from pptx_designer.tools.text import text, multiline
from pptx_designer.tools.cards import kpi_card
from pptx_designer.tools.layout import page_header
from pptx_designer.tools.images import cover_image
from pptx_designer.core.pipeline import Presentation

C = {
    "primary": "#1D78FA",
    "accent": "#FF6B35",
    "text_dark": "#1A1A1A",
    "text_body": "#4A4A4A",
    "background": "#FFFFFF",
}

prs = Presentation()
slide = prs.slides.add_slide(prs.slide_layouts[6])

page_header(slide, "Q4 Revenue Report", "Financial Summary", C=C)
kpi_card(slide, 1.0, 2.0, 3.5, 1.5, "$12.8M", "Revenue", "+23%", C=C)
kpi_card(slide, 5.0, 2.0, 3.5, 1.5, "89%", "Retention", "+5pp", C=C)
rect(slide, 0.5, 6.8, 12.3, 0.08, fill=C["primary"])

prs.save("output/q4_report.pptx")

A generated deck from structured content

from pptx_designer import generate_ppt

# Structured content makes the generated deck predictable and reviewable.
result = generate_ppt(
    content={
        "title": "Q4 Revenue Report",
        "pages": [
            {"goal": "hook", "title": "Q4 2026", "subtitle": "Record Quarter"},
            {"goal": "content", "title": "Key Metrics", "bullets": ["Revenue: $12.8M", "Growth: +23%"]},
        ]
    },
    style="professional",
    output="output/report.pptx",
)

# A simple query uses the package's built-in planner; no LLM provider is required.
result = generate_ppt("AI startup pitch deck", style="dark cyberpunk")

Pick a distinct style instead of relying on the default

When style is omitted, the planner may choose similar themes for similar requests. Ask the library for deterministic, topic-aware presets, then pass one choice back into generate_ppt() explicitly:

from pptx_designer import generate_ppt, recommend_styles

options = recommend_styles("AI technology platform")
# AI/technology -> dark-tech, neon, sci
chosen = options[0]

result = generate_ppt(
    "AI technology platform",
    style=chosen["style"],
    # Optional atom overrides. Use `layout` in Python; the CLI accepts
    # `--layout-variant` for the same setting.
    decoration=chosen["decoration"],
    layout=chosen["layout"],
    style_seed=17,
    output="output/ai-platform.pptx",
)

print(result["theme_atoms"])  # Persist the actual palette/font/decor/layout selected.

style_seed makes automatic atom selection reproducible. Explicit palette, fonts, decoration, layout, and mood values take precedence over a preset. The current professional renderer applies the palette to slide rendering; decoration and layout atoms are returned and reserved for renderer-level layout composition, rather than promising a visual rearrangement they do not yet make.

---

Build Mode

All presentations are built using composable atoms — simple, predictable functions that create shapes, text, images, and charts.

Shapes

from pptx_designer.tools.shapes import rect, rrect, oval, hexagon, diamond, star5

rect(slide, left=1, top=1, width=4, height=2, fill="#3B82F6")
rrect(slide, left=1, top=3.3, width=4, height=2, fill="#2563EB")
oval(slide, left=6, top=1, width=2, height=2, fill="#10B981")
hexagon(slide, cx=9, cy=2, size=1.5, fill="#F59E0B")

Text

from pptx_designer.tools.text import text, multiline, gradient_text, dramatic_text

text(slide, left=1, top=1, width=8, height=1, txt="Hello World", font_size=32, bold=True)
multiline(slide, left=1, top=2, width=8, height=3, lines=["Line 1", "Line 2", "Line 3"], font_size=14)
gradient_text(slide, left=1, top=1, width=8, height=1, txt="Gradient", preset="gold-shine", font_size=48)

Charts

from pptx_designer.tools.charts import bar_chart

bar_chart(slide, left=2, top=2, data=[("Q1", 0.85, "85%"), ("Q2", 0.92, "92%")])

Diagrams

from pptx_designer.diagrams import DiagramStyle, FlowchartDiagram, Region, TimelineDiagram

region = Region(left=1, top=2, width=10, height=5)
style = DiagramStyle()

FlowchartDiagram(
    data={"nodes": [{"label": "Discover"}, {"label": "Build"}, {"label": "Review"}]},
    style=style,
    region=Region(left=1, top=2, width=10, height=2),
).render(slide)

TimelineDiagram(
    data={"events": [{"year": "2024", "title": "Launch"}, {"year": "2025", "title": "Scale"}]},
    style=style,
    region=Region(left=1, top=4.5, width=10, height=2),
).render(slide)

SVG → PPTX

from pptx_designer import svg_chart

svg = """<svg viewBox="0 0 400 200" xmlns="http://www.w3.org/2000/svg">
  <rect x="20" y="20" width="360" height="160" rx="16" fill="#2563EB"/>
  <text x="200" y="112" text-anchor="middle" font-size="28"
        font-weight="bold" fill="#FFFFFF">Editable SVG</text>
</svg>"""

result = svg_chart(slide, svg, x=1, y=1, w=8, h=4)
print(result.shape_count, result.warnings)

from pptx_designer import svg_chart is the recommended public import. from pptx_designer.tools import svg_chart and the legacy from pptx_designer.tools.svg import svg_chart remain valid. The function returns SVGResult; inspect shape_count, warnings, and errors before delivery.

The compiler creates native PowerPoint shapes and text for its supported SVG subset. It supports common geometry, paths, text/tspan, transforms, gradients, defs/use, and a constrained clipping path workflow. Filters, masks, patterns, animations, external resources, and some SVG paint semantics are not full-fidelity features. Always inspect result.warnings for a production SVG. See the SVG guide for supported input, error handling, and limits.

Effects

from pptx_designer.effects import text_fx, shape_fx

text_fx.apply_shadow(shape, blur=8, distance=3, color="#000000")
shape_fx.apply_3d(shape, depth=10, material="powder")
shape_fx.apply_pattern(shape, "cross", fg="#000000", bg="#FFFFFF")

---

LLM coding workflow

The library is designed for an assistant to write ordinary Python—not to hide layout decisions behind a remote generation service. A reliable workflow is:

1. Define slide content, data, and design constraints in code.
2. Ask the LLM to compose public pptx_designer APIs.
3. Review the generated Python as normal application code.
4. Run it, inspect the .pptx, and keep the code and tests in version control.

This creates a practical feedback loop: a user can edit a title or value in PowerPoint for a one-off change, or edit the keyed Python call and rebuild when the change should be reproducible.

1. Explicit function signatures

def rect(slide, left, top, width, height, fill, line=None, C=None) -> Shape
def text(slide, left, top, width, height, txt, font_size=12, color="text_body", bold=False, ...) -> Shape
def kpi_card(slide, left, top, width, height, number, label, trend="", trend_up=True, C=None, ...) -> list[Shape]

Named arguments and focused helpers give an LLM a constrained target and give reviewers readable code.

2. Composable presentation primitives

Each helper has a narrow responsibility. An LLM can combine them like building blocks, while a developer retains control over every call:

# LLM generates this code
page_header(slide, "Title", "Subtitle", C=C)
kpi_card(slide, 1, 2, 3, 1.5, "$12M", "Revenue", "+20%", C=C)
kpi_card(slide, 5, 2, 3, 1.5, "89%", "Retention", "+5pp", C=C)
rect(slide, 0.5, 6.8, 12.3, 0.08, fill=C["primary"])

3. Theme data and explicit overrides

The built-in palette, typography, and style data help an assistant begin from coherent defaults. For production work, pin explicit choices when visual consistency matters:

from pptx_designer.renderer.theme import ThemeComposer

theme = ThemeComposer().compose(style="dark cyberpunk")
# Returns: colors, typography, decoration, layout_variant

4. No API keys for core drawing features

All shape/text/chart/diagram/effect functions work offline. AI image generation is optional.

Prompting an LLM safely

When using pptx-designer with AI coding assistants, use this system prompt:

You are a PPT generation expert using pptx-designer.

Rules:
1. Use only documented public `pptx_designer` imports; do not invent helpers or private modules.
2. Create a `Presentation()`, add a blank slide, and save the result with `prs.save(path)`.
3. Use named arguments for positions and dimensions. Coordinates are inches.
4. Keep colours in a `C` dictionary or select an explicit theme.
5. Prefer native shapes, text, charts, and diagrams. Check `SVGResult.warnings` after compiling SVG.
6. Generate a runnable Python file and do not claim the PPT is correct until it has been opened or rendered for review.

Available modules:
- pptx_designer.tools.shapes: rect, rrect, oval, hexagon, diamond, star5, triangle, arrow
- pptx_designer.tools.text: text, multiline, gradient_text, dramatic_text, vertical_text
- pptx_designer.tools.charts: bar_chart, comparison_bars
- pptx_designer.tools.cards: kpi_card, highlight_cards, code_block, section_divider, hero_slide
- pptx_designer.tools.layout: page_header, top_bar, page_number
- pptx_designer.data: PALETTES (192 colors), TYPOGRAPHY (74 fonts), STYLES (84 presets)

---

Style system

The library ships palette, typography, and style-preset data. Natural-language style selection is a convenience for exploration; explicit values are more appropriate for a reproducible build:

from pptx_designer.renderer.theme import ThemeComposer

# Natural language
theme = ThemeComposer().compose(style="warm fintech")

# Exact control
theme = ThemeComposer().compose(
    palette="cyber-neon",
    fonts="tech-mono",
    decoration="neon-glow",
    layout="sidebar-left",
)

Built-in design data

Database	Count	Access
Color palettes	192	from pptx_designer.data import PALETTES
Font pairs	74	from pptx_designer.data import TYPOGRAPHY
Style presets	84	from pptx_designer.data import STYLES

Built-in theme atoms (for ThemeComposer):

Atom	Count	Examples
Hardcoded palettes	30	ocean-blue, cyber-neon, golden-luxury
Hardcoded fonts	15	modern-sans, tech-mono, elegant-serif
Decorations	10	accent-bar, neon-glow, brush-stroke
Layouts	12	standard, sidebar-left, grid-2x2

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Template and enterprise utilities

The package also includes project-scanning and proposal utilities for template- and brand-led workflows. These APIs are optional: the code-first Build mode remains the common foundation.

from pptx_designer.enterprise import ProjectScanner, ProposalGenerator

# Scan project for assets
scanner = ProjectScanner()
assets = scanner.scan("./my-project")

# Generate style proposals
proposals = ProposalGenerator().generate(
    query="Q4 business review",
    template=assets.template_path,
)

# Generate with confirmed style
from pptx_designer import generate_ppt
result = generate_ppt(
    content=assets.content_raw,
    template=assets.template_path,
    confirmed_proposal="A",
)

---

Configuration

Image generation and .env

Put a .env beside your own build.py / project files (or in one of its parent directories), then keep it out of Git. Do not put credentials in the installed pptx_designer package directory: upgrades and virtual environments will replace it.

.env.example is the checked-in reference file. Copy it to your own project root, then replace only the provider you plan to use:

Copy-Item .env.example .env

cp .env.example .env

The package reads the nearest .env from the working directory upward. Process environment variables take precedence over values in .env.

# .env in your presentation project
PPT_IMAGE_LLM_PROVIDER=gpt-image
OPENAI_API_KEY=your-api-key
# OPENAI_IMAGE_MODEL=gpt-image-1

Test the configuration without writing image-request code yourself:

pptx-designer image "editorial fragrance bottle on black stone" --image-mode auto -v

auto resolves sources in this order:

1. A host_image_generator supplied by an Agent host.
2. Explicit Python arguments or CLI options.
3. Project .env and process environment variables.
4. An Agent provider configuration that explicitly references an environment key.
5. Stock-image search, then no image / the calling layout's placeholder.

When PPT_IMAGE_LLM_PROVIDER is omitted, auto selects a provider from one configured provider key (OPENAI_API_KEY, ARK_API_KEY, GEMINI_API_KEY, DASHSCOPE_API_KEY, or MOONSHOT_API_KEY).

from pptx_designer import fetch_image

asset = fetch_image(
    "editorial fragrance bottle on black stone",
    mode="auto",
    goal="hook",
)
print(asset["path"])  # local file path, or None when every source declines

Agent hosts can also inject a host_image_generator callback. This is the safe bridge for a host-owned image tool (such as an Agent image-generation capability) when no image API is configured: the callback must return a local image file path, which pptx-designer then places in the slide. The library does not attempt to invoke Agent tools or login credentials by itself. This hook is for Agent/Skill implementers, not ordinary build.py users:

from pptx_designer import fetch_image

def generate_with_host_tool(*, keywords, emotion, goal, width, height):
    # The Agent host calls its own image tool and returns the saved local path.
    return "C:/project/assets/generated/hero.png"

asset = fetch_image(
    "quiet modern architecture at dawn",
    mode="auto",
    host_image_generator=generate_with_host_tool,
)

A Codex provider entry is considered only when it references an environment key. Login/session tokens are never treated as image API keys, and the provider's ordinary text model is never treated as an image model. Set an explicit image_model in the Agent configuration when a non-default image model is required.

Variable	Provider	Description
ARK_API_KEY	Seedream (ByteDance)	Image generation
OPENAI_API_KEY	OpenAI	GPT Image / DALL-E
GEMINI_API_KEY	Google	Gemini images
DASHSCOPE_API_KEY	Alibaba	Wanx images
UNSPLASH_ACCESS_KEY	Unsplash	Stock photos
PEXELS_API_KEY	Pexels	Stock photos

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Development

git clone https://github.com/sunchaokun/pptx-designer.git
cd pptx-designer
pip install -e ".[dev]"

python -m pytest tests/ -q
python -m ruff check src/pptx_designer/compiler tests/test_compiler tests/test_svg_tools.py tests/test_svg_compiler_integration.py

Documentation

• Getting started
• API reference
• LLM authoring guide
• SVG compiler guide
• Changelog

Advanced examples

Explore complete four-page, editable decks in examples/: a luxury fragrance lookbook, a couture editorial deck, and an architecture vision book. Every example includes the build script, original image assets, and its generated .pptx output.

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License

MIT License — see LICENSE for details.