Modifying Theme Json
Design, enforce, audit, and validate Power BI report themes through the pbir CLI.
Install
npx skills add data-goblin/power-bi-agentic-development --skill modifying-theme-json -g -a claude-code -y- Repository
- data-goblin/power-bi-agentic-development1.1k
- Category
- Design
- Updated
- 5d ago
- License
- GPL-3.0
- Context cost
- Mediumabout 1,550 tokens
- Runs scripts
- No, instructions only
What it does
Design, enforce, audit, and validate Power BI report themes through the pbir CLI. Invoke when a report uses a default or minimal theme, visuals have inconsistent formatting or many local overrides, or the user asks to create, copy, apply, standardize, rebrand, audit, or validate a theme; change theme colors or typography; define style presets; promote visual formatting into the theme; clear overrides; or improve theme compliance.
Power BI report themes
Use this skill for theme design and compliance decisions. Use the pbir-cli skill for command details.
Non-negotiable tooling rule
Use pbir for every report and theme mutation. Never edit theme.json, visual.json, serialized .Theme fragments, or other report JSON directly. Never fall back to jq, shell replacement, or a JSON-editing skill. If pbir lacks the required operation, stop and report the missing capability.
Read JSON only through pbir cat, pbir get, or read-only examples. Prefer structured CLI inspection commands because they explain the formatting cascade and usage.
Why themes matter
A theme centralizes formatting that would otherwise drift across visuals. It should own repeated choices such as:
- Data-series palette and semantic good/neutral/bad colors
- Background, foreground, structural, gradient, hyperlink, and null colors
- Font family, size, weight, and hierarchy
- Wildcard container defaults such as titles, borders, padding, and shadows
- Visual-type defaults for cards, slicers, charts, tables, textboxes, and images
Visual-level overrides should remain only for content-specific exceptions or conditional formatting. Theme-first reports are easier to rebrand, diff, and maintain.
Formatting cascade
Power BI defaults
-> theme wildcard defaults
-> theme visual-type defaults
-> selected style preset
-> visual instance overrides
The last layer wins. Diagnose unexpected rendering with pbir visuals format, which reports the effective value and source; do not inspect or patch visual.json.
Audit before changing
pbir theme colors "Report.Report"
pbir theme fonts "Report.Report"
pbir color list "Report.Report"
pbir fonts list "Report.Report"
pbir visuals format "Report.Report/Page.Page/Visual.Visual"
pbir bpa run "Report.Report"
