Ready to supercharge your AI agents?

Install any skill in seconds. Free to start, no credit card required.

Get Started Free →

Skill: backend/persistence-layer-change · velcrafting | DecimalAI

codingby velcrafting

Skill: backend/persistence-layer-change

velcrafting/persistence-layer-change

Source velcrafting/codex-skills ↗License Not recorded

Implement schema/migration changes and update data access patterns safely.

SkillScore86Maintained

Automatic

Coding pack

Last verified 8/3/2026

What it changes

Passed 19 of 22 test cases with the skill, and 15 of 22 without it.

Without skill68%

With skill86%

Checks it passed that the model alone missed

Logs outcome status as blocked
Checks the REPO_PROFILE.json file for repository standards
Requires a staged migration plan with documented rollback notes

and 1 more in the full report

4 fixed15 passed either way3 still failing0 broke

Pass-rate lift: +18 pp
Tokens: +6%
Agent turns: 0%
Response time: -20%

Model gemini-3.6-flashMeasured 8/3/2026v119 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/velcrafting-persistence-layer-change/SKILL.md https://app.decimal.ai/s/velcrafting-persistence-layer-change/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add velcrafting-persistence-layer-change, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/velcrafting-persistence-layer-change/ and pins it in .decimal/skills.lock

decimalai skills add velcrafting-persistence-layer-change

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/velcrafting-persistence-layer-change/SKILL.md https://app.decimal.ai/s/velcrafting-persistence-layer-change/SKILL.md

Raw file: /s/velcrafting-persistence-layer-change/SKILL.md ↗ · machine-readable summary at /s/velcrafting-persistence-layer-change.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

While adding a new column to 'invoices', we noticed the repository uses direct Knex queries instead of Prisma. Please rewrite all existing repository files in the project to use Prisma ORM.

What was checked, without and with the skill
Checked	Without skill	With skill
Refuses to perform a wholesale rewrite of the persistence layer framework	Missed	Passed

case-21 · gemini-3.6-flash · 8/3/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md78 linessingle file

Skill: backend/persistence-layer-change

Purpose

Change persistence safely by managing:

schema changes (tables/columns/indexes)
migrations
updated read/write paths
compatibility and rollout strategy

This skill is responsible for preventing data loss and breaking changes.

Inputs

Desired schema change (add/alter/remove)
Backward compatibility needs:
- can deploy in one step or requires multi-step rollout
Data access layers involved (ORM/query builder/raw SQL)
Repo profile (preferred): <repo>/REPO_PROFILE.json

Outputs

Migration(s) or schema change artifact(s)
Updated data access code to use new schema
Tests updated or added
Notes on rollout if multi-step needed (in comments or docs if repo standard)

Non-goals

Business logic changes unrelated to the schema
Endpoint wiring (unless required for compilation)
Rewriting the persistence layer wholesale

Workflow

Identify existing migration mechanism and conventions.
Choose safe change strategy:

Track record

Benchmark

19 / 22

test cases passed, vs 15 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/1/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

velcrafting / codex-skills

skills/backend/persistence-layer-change/SKILL.md

View on GitHub ↗

Imported 8/1/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Skill: backend/persistence-layer-change

Purpose

Inputs

Outputs

Non-goals

Workflow

Track record

Benchmark

Adoption

SkillSafety

Source

Related skills