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myco:vault-schema-migration

Category: Security  ·  Sub-category: web-security  ·  Last updated:
Use this skill whenever you need to add, modify, or remove tables, columns, or indexes in the Myco vault SQLite schema — even if the user just asks to "add a column" or "create a new table." The vault uses a versioned createSchema migration chain where each schema version is a numbered step that builds on the previous one. Because user vaults accumulate real data across machines, any schema change that breaks the migration chain can corrupt or destroy vault data. This skill covers how to add a new version to the chain, write safe migration SQL, handle backfill steps, bump the schema version constant, sync D1 databases, and verify the migration works end-to-end before shipping.

From the source SKILL.md

The Myco vault is a SQLite database at .myco/myco.db. Its schema evolves through a numbered migration chain — each version is an incremental step applied on top of the previous one. This matters because vaults are long-lived: users have real sessions, spores, and graph data that must survive every upgrade. Breaking the chain means breaking their data.

What this skill does

myco:vault-schema-migration is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/vault-schema-migration/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The myco:vault-schema-migration Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 69,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/vault-schema-migration
curl -L https://claudskills.com/skills/vault-schema-migration/SKILL.md \
  -o ~/.claude/skills/vault-schema-migration/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/vault-schema-migration/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/vault-schema-migration/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\vault-schema-migration\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Attribution & license

More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills
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