zephyrwang6/myskill/obsidian-bases

Name: obsidian-bases
Author: zephyrwang6

Claude Code and agent skill by zephyrwang6/myskill

Trust tier 3

community

By zephyrwang6
Coding
zephyrwang6/myskill
obsidian-skills-main/obsidian-bases/SKILL.md
Updated 6 May 2026
Version 1.0.0

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Checking that the SKILL.md file is still in the repository.

Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries. Use when working with .base files, creating database-like views of notes, or when the user mentions Bases, table views, card views, filters, or formulas in Obsidian.

Install

npx vskill@latest install zephyrwang6/myskill/obsidian-bases

SKILL.md

Obsidian Bases Skill

This skill enables Claude Code to create and edit valid Obsidian Bases (.base files) including views, filters, formulas, and all related configurations.

Overview

Obsidian Bases are YAML-based files that define dynamic views of notes in an Obsidian vault. A Base file can contain multiple views, global filters, formulas, property configurations, and custom summaries.

File Format

Base files use the .base extension and contain valid YAML. They can also be embedded in Markdown code blocks.

Complete Schema

yaml

# Global filters apply to ALL views in the base
filters:
  # Can be a single filter string
  # OR a recursive filter object with and/or/not
  and: []
  or: []
  not: []
 
# Define formula properties that can be used across all views
formulas:
  formula_name: 'expression'
 
# Configure display names and settings for properties
properties:
  property_name:
    displayName: "Display Name"
  formula.formula_name:
    displayName: "Formula Display Name"
  file.ext:
    displayName: "Extension"
 
# Define custom summary formulas
summaries:
  custom_summary_name: 'values.mean().round(3)'
 
# Define one or more views
views:
  - type: table | cards | list | map
    name: "View Name"
    limit: 10                    # Optional: limit results
    groupBy:                     # Optional: group results
      property: property_name
      direction: ASC | DESC
    filters:                     # View-specific filters
      and: []
    order:                       # Properties to display in order
      - file.name
      - property_name
      - formula.formula_name
    summaries:                   # Map properties to summary formulas
      property_name: Average

Filter Syntax

Filters narrow down results. They can be applied globally or per-view.

Filter Structure

yaml

# Single filter
filters: 'status == "done"'
 
# AND - all conditions must be true
filters:
  and:
    - 'status == "done"'
    - 'priority > 3'
 
# OR - any condition can be true
filters:
  or:
    - 'file.hasTag("book")'
    - 'file.hasTag("article")'
 
# NOT - exclude matching items
filters:
  not:
    - 'file.hasTag("archived")'
 
# Nested filters
filters:
  or:
    - file.hasTag("tag")
    - and:
        - file.hasTag("book")
        - file.hasLink("Textbook")
    - not:
        - file.hasTag("book")
        - file.inFolder("Required Reading")

Filter Operators

Operator	Description
`==`	equals
`!=`	not equal
`>`	greater than
`<`	less than
`>=`	greater than or equal
`<=`	less than or equal
`&&`	logical and
`\	\	`	logical or
<code>!</code>	logical not

Properties

Three Types of Properties

Note properties - From frontmatter: note.author or just author
File properties - File metadata: file.name, file.mtime, etc.
Formula properties - Computed values: formula.my_formula

File Properties Reference

Property	Type	Description
`file.name`	String	File name
`file.basename`	String	File name without extension
`file.path`	String	Full path to file
`file.folder`	String	Parent folder path
`file.ext`	String	File extension
`file.size`	Number	File size in bytes
`file.ctime`	Date	Created time
`file.mtime`	Date	Modified time
`file.tags`	List	All tags in file
`file.links`	List	Internal links in file
`file.backlinks`	List	Files linking to this file
`file.embeds`	List	Embeds in the note
`file.properties`	Object	All frontmatter properties

The `this` Keyword

In main content area: refers to the base file itself
When embedded: refers to the embedding file
In sidebar: refers to the active file in main content

Formula Syntax

Formulas compute values from properties. Defined in the formulas section.

yaml

formulas:
  # Simple arithmetic
  total: "price * quantity"
  
  # Conditional logic
  status_icon: 'if(done, "✅", "⏳")'
  
  # String formatting
  formatted_price: 'if(price, price.toFixed(2) + " dollars")'
  
  # Date formatting
  created: 'file.ctime.format("YYYY-MM-DD")'
  
  # Complex expressions
  days_old: '((now() - file.ctime) / 86400000).round(0)'

Functions Reference

Global Functions

Function	Signature	Description
`date()`	`date(string): date`	Parse string to date. Format: `YYYY-MM-DD HH:mm:ss`
`duration()`	`duration(string): duration`	Parse duration string
`now()`	`now(): date`	Current date and time
`today()`	`today(): date`	Current date (time = 00:00:00)
`if()`	`if(condition, trueResult, falseResult?)`	Conditional
`min()`	`min(n1, n2, ...): number`	Smallest number
`max()`	`max(n1, n2, ...): number`	Largest number
`number()`	`number(any): number`	Convert to number
`link()`	`link(path, display?): Link`	Create a link
`list()`	`list(element): List`	Wrap in list if not already
`file()`	`file(path): file`	Get file object
`image()`	`image(path): image`	Create image for rendering
`icon()`	`icon(name): icon`	Lucide icon by name
`html()`	`html(string): html`	Render as HTML
`escapeHTML()`	`escapeHTML(string): string`	Escape HTML characters

Any Type Functions

Function	Signature	Description
`isTruthy()`	`any.isTruthy(): boolean`	Coerce to boolean
`isType()`	`any.isType(type): boolean`	Check type
`toString()`	`any.toString(): string`	Convert to string

Date Functions & Fields

Fields: date.year, date.month, date.day, date.hour, date.minute, date.second, date.millisecond

Function	Signature	Description
`date()`	`date.date(): date`	Remove time portion
`format()`	`date.format(string): string`	Format with Moment.js pattern
`time()`	`date.time(): string`	Get time as string
`relative()`	`date.relative(): string`	Human-readable relative time
`isEmpty()`	`date.isEmpty(): boolean`	Always false for dates

Date Arithmetic

yaml

# Duration units: y/year/years, M/month/months, d/day/days, 
#                 w/week/weeks, h/hour/hours, m/minute/minutes, s/second/seconds
 
# Add/subtract durations
"date + \"1M\""           # Add 1 month
"date - \"2h\""           # Subtract 2 hours
"now() + \"1 day\""       # Tomorrow
"today() + \"7d\""        # A week from today
 
# Subtract dates for millisecond difference
"now() - file.ctime"
 
# Complex duration arithmetic
"now() + (duration('1d') * 2)"

String Functions

Field: string.length

Function	Signature	Description
`contains()`	`string.contains(value): boolean`	Check substring
`containsAll()`	`string.containsAll(...values): boolean`	All substrings present
`containsAny()`	`string.containsAny(...values): boolean`	Any substring present
`startsWith()`	`string.startsWith(query): boolean`	Starts with query
`endsWith()`	`string.endsWith(query): boolean`	Ends with query
`isEmpty()`	`string.isEmpty(): boolean`	Empty or not present
`lower()`	`string.lower(): string`	To lowercase
`title()`	`string.title(): string`	To Title Case
`trim()`	`string.trim(): string`	Remove whitespace
`replace()`	`string.replace(pattern, replacement): string`	Replace pattern
`repeat()`	`string.repeat(count): string`	Repeat string
`reverse()`	`string.reverse(): string`	Reverse string
`slice()`	`string.slice(start, end?): string`	Substring
`split()`	`string.split(separator, n?): list`	Split to list

Number Functions

Function	Signature	Description
`abs()`	`number.abs(): number`	Absolute value
`ceil()`	`number.ceil(): number`	Round up
`floor()`	`number.floor(): number`	Round down
`round()`	`number.round(digits?): number`	Round to digits
`toFixed()`	`number.toFixed(precision): string`	Fixed-point notation
`isEmpty()`	`number.isEmpty(): boolean`	Not present

List Functions

Field: list.length

Function	Signature	Description
`contains()`	`list.contains(value): boolean`	Element exists
`containsAll()`	`list.containsAll(...values): boolean`	All elements exist
`containsAny()`	`list.containsAny(...values): boolean`	Any element exists
`filter()`	`list.filter(expression): list`	Filter by condition (uses `value`, `index`)
`map()`	`list.map(expression): list`	Transform elements (uses `value`, `index`)
`reduce()`	`list.reduce(expression, initial): any`	Reduce to single value (uses `value`, `index`, `acc`)
`flat()`	`list.flat(): list`	Flatten nested lists
`join()`	`list.join(separator): string`	Join to string
`reverse()`	`list.reverse(): list`	Reverse order
`slice()`	`list.slice(start, end?): list`	Sublist
`sort()`	`list.sort(): list`	Sort ascending
`unique()`	`list.unique(): list`	Remove duplicates
`isEmpty()`	`list.isEmpty(): boolean`	No elements

File Functions

Function	Signature	Description
`asLink()`	`file.asLink(display?): Link`	Convert to link
`hasLink()`	`file.hasLink(otherFile): boolean`	Has link to file
`hasTag()`	`file.hasTag(...tags): boolean`	Has any of the tags
`hasProperty()`	`file.hasProperty(name): boolean`	Has property
`inFolder()`	`file.inFolder(folder): boolean`	In folder or subfolder

Link Functions

Function	Signature	Description
`asFile()`	`link.asFile(): file`	Get file object
`linksTo()`	`link.linksTo(file): boolean`	Links to file

Object Functions

Function	Signature	Description
`isEmpty()`	`object.isEmpty(): boolean`	No properties
`keys()`	`object.keys(): list`	List of keys
`values()`	`object.values(): list`	List of values

Regular Expression Functions

Function	Signature	Description
`matches()`	`regexp.matches(string): boolean`	Test if matches

View Types

Table View

yaml

views:
  - type: table
    name: "My Table"
    order:
      - file.name
      - status
      - due_date
    summaries:
      price: Sum
      count: Average

Cards View

yaml

views:
  - type: cards
    name: "Gallery"
    order:
      - file.name
      - cover_image
      - description

List View

yaml

views:
  - type: list
    name: "Simple List"
    order:
      - file.name
      - status

Map View

Requires latitude/longitude properties and the Maps plugin.

yaml

views:
  - type: map
    name: "Locations"
    # Map-specific settings for lat/lng properties

Default Summary Formulas

Name	Input Type	Description
`Average`	Number	Mathematical mean
`Min`	Number	Smallest number
`Max`	Number	Largest number
`Sum`	Number	Sum of all numbers
`Range`	Number	Max - Min
`Median`	Number	Mathematical median
`Stddev`	Number	Standard deviation
`Earliest`	Date	Earliest date
`Latest`	Date	Latest date
`Range`	Date	Latest - Earliest
`Checked`	Boolean	Count of true values
`Unchecked`	Boolean	Count of false values
`Empty`	Any	Count of empty values
`Filled`	Any	Count of non-empty values
`Unique`	Any	Count of unique values

Complete Examples

Task Tracker Base

yaml

filters:
  and:
    - file.hasTag("task")
    - 'file.ext == "md"'

This is the start of the file. Read the full SKILL.md on GitHub.

Security

Security scanPassed, 90 of 100Pattern checks on the skill's files.
Model reviewPassed

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Source

SKILL.md in the repositoryCheckingobsidian-skills-main/obsidian-bases/SKILL.md

Popularity

Repository stars: 288
Repository forks: 72
7-day trend score: 28

Stars and forks are for the whole GitHub repository, not this skill alone. Refreshed 6 May 2026, 6 months ago.

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Install

SKILL.md

Obsidian Bases Skill

Overview

File Format

Complete Schema

Filter Syntax

Filter Structure

Filter Operators

Properties

Three Types of Properties

File Properties Reference

The this Keyword

Formula Syntax

Functions Reference

Global Functions

Any Type Functions

Date Functions & Fields

Date Arithmetic

String Functions

Number Functions

List Functions

File Functions

Link Functions

Object Functions

Regular Expression Functions

View Types

Table View

Cards View

List View

Map View

Default Summary Formulas

Complete Examples

Task Tracker Base

Security

Quality evaluation

Source

Popularity

Works with

The `this` Keyword