writer

name: writerdescription: "Document creation, format conversion (ODT/DOCX/PDF), mail merge, and automation with LibreOffice Writer."category: document-processingrisk: safesource: personaldate_added: "2026-02-27"

LibreOffice Writer

Overview

LibreOffice Writer skill for creating, editing, converting, and automating document workflows using the native ODT (OpenDocument Text) format.

When to Use This Skill

Use this skill when:

• Creating new documents in ODT format
• Converting documents between formats (ODT <-> DOCX, PDF, HTML, RTF, TXT)
• Automating document generation workflows
• Performing batch document operations
• Creating templates and standardized document formats

Core Capabilities

1. Document Creation

• Create new ODT documents from scratch
• Generate documents from templates
• Create mail merge documents
• Build forms with fillable fields

2. Format Conversion

• ODT to other formats: DOCX, PDF, HTML, RTF, TXT, EPUB
• Other formats to ODT: DOCX, DOC, RTF, HTML, TXT
• Batch conversion of multiple documents

3. Document Automation

• Template-based document generation
• Mail merge with data sources (CSV, spreadsheet, database)
• Batch document processing
• Automated report generation

4. Content Manipulation

• Text extraction and insertion
• Style management and application
• Table creation and manipulation
• Header/footer management

5. Integration

• Command-line automation via soffice
• Python scripting with UNO
• Integration with workflow automation tools

Workflows

Creating a New Document

Method 1: Command-Line

soffice --writer template.odt

Method 2: Python with UNO

import uno

def create_document():
    local_ctx = uno.getComponentContext()
    resolver = local_ctx.ServiceManager.createInstanceWithContext(
        "com.sun.star.bridge.UnoUrlResolver", local_ctx
    )
    ctx = resolver.resolve(
        "uno:socket,host=127.0.0.1,port=8100;urp;StarOffice.ComponentContext"
    )
    smgr = ctx.ServiceManager
    desktop = smgr.createInstanceWithContext("com.sun.star.frame.Desktop", ctx)
    doc = desktop.loadComponentFromURL("private:factory/swriter", "_blank", 0, ())
    text = doc.Text
    cursor = text.createTextCursor()
    text.insertString(cursor, "Hello from LibreOffice Writer!", 0)
    doc.storeToURL("file:///path/to/document.odt", ())
    doc.close(True)

Method 3: Using odfpy

from odf.opendocument import OpenDocumentText
from odf.text import P, H

doc = OpenDocumentText()
h1 = H(outlinelevel='1', text='Document Title')
doc.text.appendChild(h1)
doc.save("document.odt")

Converting Documents

# ODT to DOCX
soffice --headless --convert-to docx document.odt

# ODT to PDF
soffice --headless --convert-to pdf document.odt

# DOCX to ODT
soffice --headless --convert-to odt document.docx

# Batch convert
for file in *.odt; do
    soffice --headless --convert-to pdf "$file"
done

Template-based generation

Load an approved template through UNO with an AsTemplate property, then replace defined document placeholders through the document model and save to a fresh destination. The previous unzip/string-replace/zip example was removed: it neither escaped XML nor handled split text runs/ODF packaging correctly, and unchecked subprocesses could return a nonexistent output. No templating implementation is bundled here; use an audited ODF-aware implementation and verify layout.

Format Conversion Reference

Supported Input Formats

• ODT (native), DOCX, DOC, RTF, HTML, TXT, EPUB

Supported Output Formats

• ODT, DOCX, PDF, PDF/A, HTML, RTF, TXT, EPUB

Command-Line Reference

soffice --headless
soffice --headless --convert-to <format> <file>
soffice --writer    # Writer
soffice --calc      # Calc
soffice --impress   # Impress
soffice --draw      # Draw

Python Libraries

pip install odfpy     # ODF manipulation
pip install ezodf     # Easier ODF handling

Best Practices

1. Use styles for consistency
2. Create templates for recurring documents
3. Ensure accessibility (heading hierarchy, alt text)
4. Fill document metadata
5. Store ODT source files in version control
6. Test conversions thoroughly
7. Embed fonts for PDF distribution
8. Handle conversion failures gracefully
9. Log automation operations
10. Clean temporary files

Troubleshooting

Cannot open socket

# Inspect the listener and stop only the task-owned process after saving its documents.
soffice --headless --accept="socket,host=127.0.0.1,port=8100;urp;"

Conversion Quality Issues

soffice --headless --convert-to pdf:writer_pdf_Export document.odt

Resources

• LibreOffice Writer Guide
• LibreOffice SDK
• UNO API Reference
• odfpy

Related Skills

• calc
• impress
• draw
• base
• workflow-automation

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

Automation and document limits

Verify the actual LibreOffice version, filters, Python UNO binding and database drivers; installing unrelated Python libraries does not provide UNO. Bind any UNO listener to loopback in a separate task-owned profile and stop it after use; UNO is not an authenticated sandbox. Do not terminate all office processes or expose the listener publicly. Use a fresh private output directory, check expected file type/nonempty output and inspect the rendered result; exit zero alone is insufficient.

Opening documents can invoke macros, external links or embedded content: use approved inputs with macros/updates disabled and isolate untrusted conversions. Format conversion may lose layout, formulas, links, notes, multiple sheets/pages or features. Retain originals, clarify CSV sheet/delimiter/encoding and preserve formula/identifier semantics. Do not automatically install packages, publish documents or put sensitive records in Git. These examples were statically reviewed only; no LibreOffice process or conversion was run.