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Convert EPUB ↔ PDF bidirectionally. EPUB→PDF preserves layout for analysis; PDF→EPUB compresses and reflows for distribution and ereaders.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Based on SOC occupation classification
Deterministic pipeline for authoring, verifying, exporting, and deploying OpenCoven Slidev decks (the weekly Show'n Spells system and one-off branded decks). Use whenever asked to build, rebuild, update, export, or publish a Slidev slide deck for OpenCoven — weekly meeting decks, launch decks, or explainer decks.
Keep familiar-owned Coven board tasks current and actionable.
Agent-operable design constraints for OpenCoven, Coven, harness cockpits, docs, and integration surfaces
OpenClaw-only maintainer PR workflow modes and skills. For OpenCoven/coven PR creation, redirect to skills/pr-agent, the Coven PR Readiness Agent.
OpenClaw Dev Agent — OpenClaw-only docs-aware development assistant. For OpenCoven/coven PR creation, redirect to skills/pr-agent, the Coven PR Readiness Agent.
Coven PR Readiness Agent for assembling agent-ready OpenCoven pull requests. Use when preparing PR context, verification, risk, rollback, and handoff material for OpenCoven/coven.
| name | epub |
| description | Convert EPUB ↔ PDF bidirectionally. EPUB→PDF preserves layout for analysis; PDF→EPUB compresses and reflows for distribution and ereaders. |
brew install calibre)ebook-convert with formatting optionsebook-convert with reflowable settingsresearch/sources/ for distribution or ereader useebook-convert input.epub output.pdf
ebook-convert input.epub output.pdf \
--pdf-standard-font "sans" \
--paper-size "a4" \
--margin-left 20 \
--margin-right 20 \
--margin-top 20 \
--margin-bottom 20 \
--pdf-mono-family "mono"
Note: Valid font families are: serif, sans, mono (not Helvetica, etc.)
ebook-convert input.pdf output.epub
ebook-convert input.pdf output.epub \
--output-profile "tablet" \
--paper-size "a4"
Note: ebook-convert auto-detects chapters from PDFs. Inspect the output EPUB to verify structure.
# Convert EPUB to PDF for analysis
ebook-convert "/path/to/input.epub" "/path/to/research/sources/output.pdf"
# Verify and check size
ls -lh "/path/to/research/sources/output.pdf"
# Render pages for visual inspection
pdftoppm -png "/path/to/research/sources/output.pdf" "/tmp/preview/page"
# Convert PDF to EPUB for distribution
ebook-convert "/path/to/input.pdf" "/path/to/research/sources/output.epub"
# Verify compression
ls -lh "/path/to/input.pdf" "/path/to/research/sources/output.epub"
# (EPUB will typically be 30-50% of PDF size)
System package:
# macOS (Homebrew)
brew install calibre
# Ubuntu/Debian
sudo apt-get install -y calibre
# Fedora/RHEL
sudo dnf install calibre
calibre includes ebook-convert and supports many formats:
research/sources/ with descriptive namesAuthor-Title.pdf, title-yyyy-mm-dd.epubfile output.pdf confirms it's a valid PDFcontent.opf for auto-detected chaptersunzip -t input.epubebook-convert input.epub output.pdfunzip -p input.epub | grep -r "html") and convert to markdown--verbose to see what calibre detected: ebook-convert input.pdf output.epub --verbose--output-profile "tablet" for better compressionebook-convert maintains structure, typography, imagesunzip -t input.epub (EPUBs are ZIP files)ebook-convert input.epub output.pdf --verbose for error details✅ SHELLFISH.epub → SHELLFISH.pdf (73 KB → 639 KB, layout preserved, 89 pages)
✅ SHELLFISH.pdf → SHELLFISH-test.epub (639 KB → 262 KB, chapters auto-detected, 24 parts)
EPUB ↔ PDF bidirectional conversion pipeline ready. Last tested: 2026-04-29 | Calibre v5.x