Design export repair

Fixes AI-generated deck/PDF exports (built for Claude Design's export path, but the checks are generic OOXML/PDF hygiene, not Claude-specific) that look fine in the app but come apart once exported — text missing its last few characters, fonts that don't match the original design, or a .pptx that some converters choke on even though PowerPoint opens it fine.

Four defect classes were found and fixed against a real broken export; references/defect-classes.md has the full story for each, including how they were confirmed and what the fix trades off. Skim it before extending this skill to a case it doesn't already handle — in particular, defect #4 there is a good example of why "the shape geometry looks right" is not the same claim as "the rendered PDF looks right," and it's worth reading before assuming a new complaint is a geometry problem.

End-to-end: from Claude Design to a clean file

This is written for the person running Claude Code, not just for Claude — skim it once so you know what to actually do. There are two different ways a Design project reaches Claude Code, and they behave differently.

Path A — plain Export (this is the one that matches "my deck/PDF looks broken"): In Claude Design, use Export and pick PDF, PPTX, or HTML. Save the file, then bring it to whichever Claude Code you're using — attach it in the chat if your setup allows that, or save it to disk and give Claude the path. Then tell Claude to use this skill: plain language like "this deck looks broken when I export it to PDF, can you fix it" is enough on its own (the skill's description is written to match that phrasing), or name it directly (design-export-repair) if you want to be explicit.

Path B — the "Send to Claude Code" button. This is a related but different feature from plain Export — it's aimed at continuing design/ prototype work in code, not at fixing a deck export, but you may end up here anyway. It offers two options, and they behave differently:

• "Send to Claude Code Web" opens a brand-new claude.ai/code session with the design bundle already sitting in that session's working directory — there's no file to save or attach, it's just already there. In that new session, tell Claude to look at what's in the working directory and use this skill on it.
• "Send to local coding agent" gives you a prompt to paste into your local terminal Claude Code. Be aware: as of this writing, that default prompt depends on a "Claude Design connector" that local Claude Code doesn't ship, and reliably fails silently (see anthropics/claude-code#69246 if you want the details). The same dialog has a "Download zip instead" option — that one actually works: it downloads a real zip of the design files. Save that zip, point local Claude Code at it (or unzip it into your project folder first), and tell Claude to use this skill on it.

Whichever path you took, scripts/fix_export.py accepts a file, a zip, or a whole directory — unpack.py figures out what it's looking at rather than requiring one specific shape. One thing worth knowing about Path B specifically: its bundle format is Design's own *.dc.html canvas files, which is a different animal from the .pptx this skill's repair pipeline was actually built and verified against (see references/defect-classes.md) — a .dc.html bundle gets routed through the best-effort HTML path (convert_html.py) instead of the fully-tested one. If you're trying to fix a broken deck/PDF export specifically, Path A is the one to reach for.

After either path, Claude runs scripts/fix_export.py and hands back a repaired .pptx (Path A) or PDF, plus a report explaining exactly what was wrong and what changed. Open the repaired .pptx if you want to keep editing in PowerPoint/Keynote/Google Slides, or use the .pdf directly if that's the deliverable you needed.

One honest caveat: buttons and flows in Claude products change over time, and this description of Path B is based on Claude Code's own public issue tracker rather than hands-on testing of that specific handoff. If what you see doesn't match this, don't get stuck on it — just get the actual design files to Claude Code by whatever route works, and tell Claude to use this skill; unpack.py is written to figure out what it's been handed.

Quick summary of what gets fixed

#	Defect	Symptom	Fix
1	[Content_Types].xml declares parts that don't exist in the zip	Some converters fail, drop slides, or garble output; PowerPoint may silently "repair" and hide it	Load + re-save through python-pptx (rebuilds the manifest from what's actually there)
2	A shape's box extends past the slide edge	Can get clipped by renderers that treat the slide as a strict viewport	Translate the shape back in bounds (or scale down + rescale table grids, if the shape is bigger than the slide itself)
3	Custom webfonts (Inter, Plus Jakarta Sans, JetBrains Mono seen in practice) used but not embedded	Renderer without those fonts substitutes something else — wrong look, different text measurements	Install matching bundled/fetched font files where the renderer will find them, before conversion
4	LibreOffice clips the tail of any text run with letter-spacing (a:rPr spc)	Tracked-out labels/kickers/badges lose their last 1-4 characters — this is usually the actual cause of "text is cut off" even when #2 is also present	Render a letter-spacing-neutralized copy through LibreOffice only; the returned .pptx keeps its real letter-spacing for editing

How to run it

Everything is one script:

python3 scripts/fix_export.py <input> --out-dir <where to write results>

<input> can be:

• a .pptx handed directly (this is what Claude Design's export has produced in practice — don't assume it must be wrapped in a zip)
• a .zip — it gets extracted and searched for a .pptx first, then an HTML/CSS/JS bundle (index.html + assets), then a bare .pdf
• a bare .pdf — repair is limited without the source; see below

Read the script's own docstring for the full pipeline description before running it if anything about the input is unusual — it's kept in sync with what the code actually does.

After it runs, look at <out-dir>/repair_report.md. It documents, in order: what was wrong with the package structure, every shape that got repositioned/resized (slide, before/after coordinates), the status of every font the deck uses (installed / fetched / falling back), whether the letter-spacing workaround applied, and a validation pass on the final PDF (page count vs. slide count, any pages that look unexpectedly blank, any text that still touches a page edge). Read this back to the user — it's written to be shown, not just logged, because the whole point of this skill is "nothing changes silently."

Outputs land in <out-dir>:

• *.repaired.pptx — still fully editable, structurally clean, no off-canvas shapes, original letter-spacing intact
• *.repaired.pdf — the clean PDF, converted from a letter-spacing- neutralized render copy (see defect #4) so tracked-out labels don't clip
• repair_report.md / repair_report.json

When the input is a bare PDF with no source file

Structural repair (package structure, shape geometry, font substitution) needs the editable source — there's no way to move a shape or fix a font reference in something that's already been flattened to fixed vector paths and rasterized text. fix_export.py still runs the same PDF validation pass (page count sanity, blank-page check, edge-overflow check) so you at least get an honest read on whether the PDF itself looks broken, but say so plainly to the user rather than implying a fix happened: ask if they can re-export from Design as a .pptx/zip instead, since that's where the actual repair leverage is.

When the input is an HTML/CSS/JS bundle

This path (scripts/convert_html.py) is best-effort, not backed by a real defect investigation the way the .pptx path is — there was no sample of this shape to test against. It applies the generic fixes that most commonly break an HTML deck's print-to-PDF (forces background/color printing, un-hides anything relying on overflow: hidden + scrolling, avoids mid-element page breaks) and picks a page size from whatever the markup hints at. If you hit a real broken HTML export, treat this as a starting point and read references/defect-classes.md's closing section on how to diagnose a new case (render, compare, isolate, don't guess from markup alone) rather than assuming the existing generic fixes cover it.

Extending this skill

If a deck comes through with a defect not in the table above, the method that found defect #4 generalizes: don't debug from the XML/CSS alone, because "looks structurally fine" and "renders fine" are different claims and only the second one is what the user is reporting. Render the untouched original to PDF, render a copy with one specific, isolated change, and compare the two — that's what confirmed the letter-spacing bug after the geometry and font fixes alone didn't resolve the visible clipping. scripts/validate_pdf.py already does the page-count/blank- page/edge-overflow checks; add to it if you find another cheap, objective signal worth checking automatically on every run.