motlin

Sync Schemas — Development skill for Claude Code

Development community

Find JSONL/settings fields seen on disk that strict Zod schemas don't allow, and add them as optional.

How to install Sync Schemas

Installs to ~/.claude/commands/motlin-claude-code-plans-sync-schemas.md

Terminal

mkdir -p ~/.claude/commands && curl -fsSL https://raw.githubusercontent.com/motlin/claude-code-plans/HEAD/.claude/commands/sync-schemas.md -o ~/.claude/commands/motlin-claude-code-plans-sync-schemas.md

Restart Claude Code, or start a new session, for it to be picked up.

What Sync Schemas does

description: Find JSONL/settings fields seen on disk that strict Zod schemas don't allow, and add them as optional.

We have several "Schema against disk" vitest tests that walk `~/.claude/` and validate real files against our strict Zod schemas. When Claude Code (or settings, or hooks) starts emitting a new field, those tests fail with `unrecognized_keys`. The fix is always the same shape: add the field as `.optional()` (or a union branch) to the right schema. See commit `9cb1b41` fo

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