Evolving The Data Model
TriliumNext/Trilium
A skill your agent uses when adding a DB migration or a new column/field to a Becca entity in Trilium ("add a migration", "new column on notes/attributes", "ALTER TABLE", "add a field to…
Add or change eXeLearning Kysely schema migrations, the migration registry or legacy database upgrades.
Install Database Migration
$ npx skills add exelearning/exelearning --skill database-migration -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install exelearning/exelearning database-migration --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/database-migration .claude/skills/database-migration && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "database-migration" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migration into .claude/skills/database-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-migration", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migrationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add exelearning/exelearning --skill database-migration -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install exelearning/exelearning database-migration --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/database-migration .agents/skills/database-migration && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "database-migration" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migration into .agents/skills/database-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-migration", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add exelearning/exelearning --skill database-migration -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install exelearning/exelearning database-migration --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/database-migration .cursor/skills/database-migration && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "database-migration" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migration into .cursor/skills/database-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-migration", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/exelearning/exelearning.git --path .agents/skills/database-migration--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add exelearning/exelearning --skill database-migration -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install exelearning/exelearning database-migration --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/database-migration .gemini/skills/database-migration && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "database-migration" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migration into .gemini/skills/database-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-migration", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install exelearning/exelearning database-migrationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add exelearning/exelearning --skill database-migration -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/database-migration .github/skills/database-migration && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "database-migration" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migration into .github/skills/database-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-migration", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add exelearning/exelearning --skill database-migration -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install exelearning/exelearning database-migration --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/exelearning/exelearning.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/database-migration .opencode/skills/database-migration && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "database-migration" agent skill from https://github.com/exelearning/exelearning/tree/main/.agents/skills/database-migration into .opencode/skills/database-migration/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "database-migration", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
database-migration- GitHub stars
- 145
- Token cost
- ~532 tokens
- SKILL.md length
- 243 words
- Files
- 1
- Skills in repo
- 17
- Repo updated
- First seen
- Licence
- AGPL-3.0
At a glance
Add or change eXeLearning Kysely schema migrations, the migration registry or legacy database upgrades.
- Works in 5 steps: Add the next unused ordered migration… → Kysely 0.29 imports Migrator, Migration… → Implement up and the corresponding down… → …
- Tasks that involve Database migrations
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Database Migration is an agent skill from exelearning/exelearning. Add or change eXeLearning Kysely schema migrations, the migration registry or legacy database upgrades.
Its SKILL.md is about 530 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Databases, covering Database migrations. The repository describes itself as: eXeLearning is an AGPL-licensed free/libre tool to create and publish open educational resources. The licence is AGPL-3.0.
When your agent uses it
- Tasks that involve Database migrations
Example prompts
- “/database-migration”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Add the next unused ordered migration and register it in the static registry in index.ts.
- Kysely 0.29 imports Migrator, Migration and MigrationProvider from kysely/migration, not the
- Implement up and the corresponding down contract, explicitly accounting for irrecoverable data
- Use existing auto-increment, binary type, column/table existence and returning helpers. The schema
- Update src/db/types.ts and affected queries when the schema contract changes. Preserve legacy Symfony
What it can do on your machine
Read from SKILL.md and the folder at commit 319b5d2. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Database Migration loads about 532 tokens when it runs. Until then it costs about 31 tokens; SKILL.md has 243 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from exelearning/exelearning at commit 319b5d2, republished under its AGPL-3.0 licence (© exelearning). 243 words, ~532 tokens.
Download SKILL.mdSave it as
.claude/skills/database-migration/SKILL.md (or your agent's skills folder).- name
- database-migration
- description
- Add or change eXeLearning Kysely schema migrations, the migration registry or legacy database upgrades.
Database migrations
Start with src/db/migrations/index.ts, the latest numbered migration, src/db/helpers.ts,
src/db/dialect.ts, src/db/types.ts, and affected queries/tests.
- Add the next unused ordered migration and register it in the static registry in
index.ts. Adding a file alone does not register it. Preserve previously applied names/order; do not renumber history. - Kysely 0.29 imports
Migrator,MigrationandMigrationProviderfromkysely/migration, not the package root. Keep the static provider for bundled/standalone builds; do not replace it with filesystem scanning. - Implement
upand the correspondingdowncontract, explicitly accounting for irrecoverable data changes rather than promising lossless rollback. Historical migrations must remain independent of evolving application table types; use the established migration typing/helpers. - Use existing auto-increment, binary type, column/table existence and returning helpers. The schema builder does not erase SQLite/PostgreSQL/MySQL differences. Check FK rebuild and nullable-ID patterns in migrations 003–005 before modifying related columns.
- Update
src/db/types.tsand affected queries when the schema contract changes. Preserve legacy Symfony detection and migration-tracking initialization, as well as a fresh install and ordinary upgrade.
Test up, down, preservation of existing data, repeat/partial upgrade behavior where relevant, and
registry ordering. Use src/db/migrations/kysely-subpath.spec.ts for import compatibility.
Use isolated in-memory SQLite where sufficient; disposable file-backed DBs are appropriate for worker,
locking or persistence behavior. They are not forbidden. Test dialect-sensitive changes against the
actual supported engines with the existing DB matrix; do not claim three-engine coverage from mocks alone.
Run verify-change final code gates and document a durable schema decision when required.
© exelearning, AGPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/database-migration of exelearning/exelearning.
Open the folder on GitHubat commit 319b5d2
Compare with similar skills
Database Migration next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Database Migration this skillexelearning/exelearning | 145 | — | ~532 | Automated safety check: Pass | AGPL-3.0 | |
| Evolving The Data ModelTriliumNext/Trilium | 38k | — | ~2.1k | Automated safety check: Pass | AGPL-3.0 | |
| Creating Database MigrationsNangoHQ/nango | 13k | — | ~449 | Automated safety check: Pass | Custom licence | |
| Openwrt Package UpdateNethServer/nethsecurity | 191 | — | ~841 | Automated safety check: Pass | Custom licence | |
| Free Willsyahiidkamil/Software-Engineer-AI-Agent-Atlas | 397 | — | ~3.4k | Automated safety check: Pass | None | |
| Ecto Migrationsoperately/operately | 576 | — | ~1.2k | Automated safety check: Pass | Custom licence |
Similar skills
Creating Database Migrations
NangoHQ/nango
A skill your agent uses when adding or editing Nango database migrations - covers migration directory selection, timestamped .cjs naming, matching recent migration style, down migration decisions…
Openwrt Package Update
NethServer/nethsecurity
A skill your agent uses when updating any forked OpenWrt package in a NethSecurity workspace from the upstream openwrt/packages feed.
Free Will
syahiidkamil/Software-Engineer-AI-Agent-Atlas
Deliberate-choice procedure for a medium-to-high-stakes engineering fork — when the first plausible solution (the instinct, the default next-token pull) would be costly to get wrong.
Ecto Migrations
operately/operately
Rules for Operately schema migrations (app/priv/repo/migrations/) and data migrations (app/lib/operately/data/change.ex).
DB Migrate
simstudioai/sim
Author or review a Drizzle DB migration for zero-downtime safety — expand/contract phasing, backward-compatibility with the deployed app version, and writing the -- migration-safe acknowledgment the…
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Related
Categories
Questions about Database Migration
What does Database Migration do?
Add or change eXeLearning Kysely schema migrations, the migration registry or legacy database upgrades. Database Migration is an agent skill from exelearning/exelearning. Add or change eXeLearning Kysely schema migrations, the migration registry or legacy database upgrades.
When should I use Database Migration?
Database Migration fits situations like: tasks that involve Database migrations.
How do I install Database Migration in Claude Code?
Run `npx skills add exelearning/exelearning --skill database-migration -a claude-code`. Or copy the skill folder (.agents/skills/database-migration in exelearning/exelearning) into .claude/skills/database-migration in your project. Claude Code loads it when a task matches its description.
How do I install Database Migration in Codex?
Run `npx skills add exelearning/exelearning --skill database-migration -a codex`. Or copy the skill folder (.agents/skills/database-migration in exelearning/exelearning) into .agents/skills/database-migration in your project. Codex loads it when a task matches its description.
Can I use Database Migration in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add exelearning/exelearning --skill database-migration -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/database-migration, .gemini/skills/database-migration, .github/skills/database-migration and .opencode/skills/database-migration in your project.
What does Database Migration need to run?
SKILL.md names no scripts, command-line tools or credentials: Database Migration is instructions for the agent only.
Does Database Migration access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Database Migration safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Database Migration use?
Database Migration is published under the AGPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Database Migration use?
About 532 tokens (SKILL.md is roughly 2.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Database Migration?
Skills that share tags, products or a category with Database Migration: Evolving The Data Model (TriliumNext/Trilium, 38k stars), Creating Database Migrations (NangoHQ/nango, 13k stars), Openwrt Package Update (NethServer/nethsecurity, 191 stars) and Free Will (syahiidkamil/Software-Engineer-AI-Agent-Atlas, 397 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Database Migration?
exelearning (a GitHub organization) maintains it in exelearning/exelearning, which has 145 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 7, 2026.
Source: exelearning/exelearning on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.