Writing to Logseq

When to Use This Skill

This skill auto-invokes when:

• User wants to create new pages or blocks in Logseq
• Updating existing content in the graph
• Setting or modifying properties on entities
• Adding tags/classes to blocks
• Syncing conversation notes to Logseq
• User mentions "add to logseq", "create page", "update block"

Write Operations: See {baseDir}/scripts/write-operations.py for the API.

Available Operations

Operation	Description
create_page(title, content)	Create new page
create_block(parent, content)	Add block under parent
update_block(uuid, content)	Modify block content
delete_block(uuid)	Remove block
set_property(uuid, key, value)	Set property value
add_tag(uuid, tag)	Add tag/class to block
append_to_page(title, content)	Add content to existing page

Quick Examples

Create a Page

from write_operations import LogseqWriter

writer = LogseqWriter()

# Create simple page
page = writer.create_page("Meeting Notes 2024-01-15")

# Create page with initial content
page = writer.create_page(
    "Project Alpha",
    content="Project overview and tasks",
    properties={"status": "Active", "priority": "High"}
)

Add Blocks

# Add block to a page
block = writer.create_block(
    parent="page-uuid-or-title",
    content="New task item"
)

# Add nested block
child = writer.create_block(
    parent=block["uuid"],
    content="Sub-task details"
)

Update Content

# Update block content
writer.update_block(
    uuid="block-uuid",
    content="Updated content here"
)

# Append to existing page
writer.append_to_page(
    title="Daily Notes",
    content="- New item added via API"
)

Set Properties

# Set single property
writer.set_property(
    uuid="block-uuid",
    key="status",
    value="Complete"
)

# Set typed property
writer.set_property(
    uuid="block-uuid",
    key="rating",
    value=5,
    type="number"
)

# Set multiple properties
writer.set_properties(
    uuid="block-uuid",
    properties={
        "author": "John Doe",
        "rating": 5,
        "published": "2024-01-15"
    }
)

Add Tags

# Add tag to block
writer.add_tag(uuid="block-uuid", tag="Book")

# Add multiple tags
writer.add_tags(uuid="block-uuid", tags=["Important", "Review"])

HTTP API Methods

Create Page

{
  "method": "logseq.Editor.createPage",
  "args": ["PageTitle", {"property": "value"}, {"createFirstBlock": true}]
}

Insert Block

{
  "method": "logseq.Editor.insertBlock",
  "args": ["parent-uuid", "Block content", {"sibling": false}]
}

Update Block

{
  "method": "logseq.Editor.updateBlock",
  "args": ["block-uuid", "New content"]
}

Set Property

{
  "method": "logseq.Editor.upsertBlockProperty",
  "args": ["block-uuid", "property-name", "value"]
}

Delete Block

{
  "method": "logseq.Editor.removeBlock",
  "args": ["block-uuid"]
}

Safety Guidelines

Best Practices

1. Verify before delete - Always confirm block exists before removal
2. Use unique titles - Avoid creating duplicate pages
3. Validate properties - Ensure property types match schema
4. Handle errors - Catch and handle API failures gracefully

Common Pitfalls

• Duplicate pages: Check if page exists before creating
• Invalid UUIDs: Verify UUID format before operations
• Property types: Number properties need numeric values
• Rate limiting: Don't spam API with rapid requests

Content Formatting

Markdown Support

# Logseq supports markdown in blocks
writer.create_block(
    parent=page_uuid,
    content="""
## Section Header

- Bullet point
- Another point
  - Nested item

**Bold** and *italic* work too.

[[Link to Page]] and #tags
"""
)

Property Syntax

# Properties can be set in content
writer.create_block(
    parent=page_uuid,
    content="""
- Task item
  status:: In Progress
  priority:: High
  due:: [[2024-01-20]]
"""
)

# Or via API (preferred for typed values)
writer.set_property(uuid, "rating", 5)  # number
writer.set_property(uuid, "done", True)  # checkbox

Sync Conversation to Logseq

Pattern for Saving Notes

def sync_conversation_to_logseq(title, notes):
    """Sync conversation notes to Logseq page."""
    writer = LogseqWriter()

    # Create or get page
    page = writer.get_or_create_page(f"Claude Notes/{title}")

    # Add timestamp header
    from datetime import datetime
    timestamp = datetime.now().strftime("%Y-%m-%d %H:%M")

    writer.append_to_page(
        title=f"Claude Notes/{title}",
        content=f"""
## {timestamp}

{notes}

---
"""
    )

    return page

Error Handling

try:
    page = writer.create_page("My Page")
except writer.ConnectionError:
    print("Cannot connect to Logseq")
except writer.DuplicateError:
    print("Page already exists")
except writer.ValidationError as e:
    print(f"Invalid data: {e}")

Reference Materials

• See {baseDir}/references/write-operations.md for all operations
• See {baseDir}/references/safety-guidelines.md for safety practices
• See {baseDir}/templates/page-template.md for page templates