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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.
Security AStatic scan found no risk patternsHow grading works ›

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 153,000+ 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.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

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

Frequently asked questions

How do I install the myco:vault-schema-migration Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/vault-schema-migration/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the myco:vault-schema-migration skill do?
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.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the myco:vault-schema-migration skill?
Use myco:vault-schema-migration when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use myco:vault-schema-migration" or describe the task and let Claude pick). Browse related skills at /category/security/.
What is a Claude Code skill and how does the myco:vault-schema-migration skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. myco:vault-schema-migration is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
goondocks-co. (2026). myco:vault-schema-migration [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/vault-schema-migration/
BibTeX
@misc{vault-schema-migration-2026,
  author    = {goondocks-co},
  title     = {myco:vault-schema-migration [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/vault-schema-migration/}
}

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Security scan

Grade A · scanned 2026-07-18 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (execution), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

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

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