PowerPoint presentations

Follow an explicit user or applicable AGENTS.md requirement for an environment or library. Otherwise call load_workspace_dependencies and use its Python executable and bundled presentation libraries. Do not install npm or pip packages or locate a system interpreter for the default workflow. If the tool is unavailable, use an already configured environment and report a missing dependency only when it prevents the requested operation.

Keep scripts and output files in the task workspace. The runtime and skill directory contain shared read-only resources. Match the requested slide language and the supplied presentation's design when editing it.

Name Python scripts for their task, such as edit_pptx.py; avoid module names such as inspect.py, pptx.py, or zipfile.py that shadow imported libraries.

Create and edit

Use python-pptx to inspect or modify an existing presentation. Inspect slide layouts, text runs, images, tables, and charts before editing. Change only the requested content, preserve mixed text formatting, and save to a new file unless the user requests an in-place edit. Rebuilding slides can discard unsupported animation, SmartArt, or other extension content.

For a new deck, use python-pptx with editable text, tables, and charts. Use local image assets rather than network-dependent image URLs. Set slide dimensions, text sizes, and chart data explicitly.

A minimal editable deck, run with the selected Python executable:

from pptx import Presentation
from pptx.chart.data import CategoryChartData
from pptx.enum.chart import XL_CHART_TYPE
from pptx.util import Inches, Pt

presentation = Presentation()
presentation.slide_width = Inches(13.333)
presentation.slide_height = Inches(7.5)
slide = presentation.slides.add_slide(presentation.slide_layouts[6])
title = slide.shapes.add_textbox(Inches(0.6), Inches(0.4), Inches(12), Inches(0.8))
run = title.text_frame.paragraphs[0].add_run()
run.text = "Quarterly report"
run.font.size = Pt(30)
data = CategoryChartData()
data.categories = ["Q1", "Q2"]
data.add_series("Revenue", [12, 18])
slide.shapes.add_chart(XL_CHART_TYPE.COLUMN_CLUSTERED,
                       Inches(0.8), Inches(1.6), Inches(11.5), Inches(4.8), data)
presentation.save("report.pptx")

Use Inches or Cm for positions and sizes and Pt for font sizes. To edit a generated title while retaining its other slides and charts:

from pptx import Presentation

presentation = Presentation("report.pptx")
for shape in presentation.slides[0].shapes:
    if shape.has_text_frame and shape.text == "Quarterly report":
        shape.text_frame.paragraphs[0].runs[0].text = "Quarterly results"
presentation.save("report-edited.pptx")

Check that text and images fit the slide dimensions, titles form a useful sequence, and chart labels agree with source values. Paragraph alignment does not move a text box: when a title must be centered on the slide, center both its paragraph and the text box against presentation.slide_width, then reopen to verify both. A native chart's embedded workbook is part of the deliverable and must contain the intended data. Library support for writing PPTX is not a rendering engine or a guarantee that every PowerPoint feature survives editing.

Check and deliver

Reopen the saved presentation with python-pptx to verify the requested slide count, content, formatting, chart data, and notes, including unchanged content that must be preserved. These checks do not establish text fit, readable contrast, or rendering fidelity.

Deliver after the requested edits are verified. Creating a file or changing content with incidental basic formatting does not require additional operations. Load office-render for requested images or visual inspection and for appearance-focused styling, spacing, sizing, or alignment changes unless the user explicitly skips rendering. For PDF output load office-export-pdf.

Call present({"files":[{"path":"report-edited.pptx"}]}) with the actual final PPTX path. It exposes the current source file without copying or preserving its bytes, so keep that file in place and leave intermediate images and reports out of delivery unless requested. If present is unavailable, use the session's supported file delivery method.