Graph Colorize, Color-code the Obsidian Graph View

You are rewriting $OBSIDIAN_VAULT_PATH/.obsidian/graph.json so Obsidian's graph view tints nodes by tag, folder, or visibility.

Obsidian stores graph settings in <vault>/.obsidian/graph.json. The colorGroups array is a list of {query, color} pairs; the first matching query wins per node. Queries use Obsidian's search syntax: tag:#foo, path:"concepts", file:foo, etc. Color is {"a": 1, "rgb": <packed-int>} where the int is (R << 16) | (G << 8) | B.

Before You Start

1. Resolve config, follow the Config Resolution Protocol in llm-wiki/SKILL.md (inline @name override → walk up CWD for .env → global config → prompt setup). This gives OBSIDIAN_VAULT_PATH.
2. Confirm $OBSIDIAN_VAULT_PATH/.obsidian/ exists. If it doesn't, the vault has never been opened in Obsidian, tell the user to open the vault once in Obsidian, then re-run.
3. Warn the user if Obsidian is likely open: Obsidian overwrites graph.json on close. Tell them to close the vault first, or be ready to reload (Cmd/Ctrl+R) and not touch the graph settings until they reload.

Step 1: Pick a Mode

Infer the mode from the user's phrasing. If ambiguous, default to by-tag.

User intent	Mode
"color by tag", "color my graph", "make it colorful" (default)	by-tag
"color by folder", "color by category", "color by directory"	by-category
"highlight visibility", "show internal/pii in graph", "visibility colors"	by-visibility
User provides explicit mapping (tag:#foo = red, or JSON blob)	custom
"combine tag and visibility" / "both"	combined (visibility first, then tag)

Step 2: Build the colorGroups Array

Palette (10 distinct, colorblind-friendly colors)

Use in order. If more groups than colors, cycle and add a lightness shift by dividing brightness ~20% via a second pass, or just cap at 10 and tell the user the remaining tags share the "other" color.