docs(skills): Prisma Postgres has no query cache; backups are paid-plan only

[gregory-boch-prisma]

Closes #344

What

One file, skills/prisma-platform-core-concepts/SKILL.md, in ## Prisma Postgres:

Line	Was	Now
271-272	"built-in connection pooling (no PgBouncer to run), optional query caching, and automated backups."	"built-in connection pooling (no PgBouncer to run) and, on paid plans, automated backups: a snapshot each day the database has activity."
278	"Backups are automated, listable, and restorable, and per-database usage metrics are queryable"	"On paid plans, backups are automated, listable, and restorable. Per-database usage metrics are queryable"

metadata and description are not touched (authoring rule 4), and no command or flag is added (rule 1).

Why

• Prisma Postgres "includes connection pooling but has no query cache of its own, and query caching is not on our immediate roadmap": https://www.prisma.io/docs/postgres/faq.md
• Snapshots are created daily, on days the database has activity, on Starter, Pro and Business plans only (7, 7 and 30 days of retention): https://www.prisma.io/docs/postgres/database/backups.md

An agent that loads this skill after prisma skills sync currently tells users their database has query caching, and that a Free database is backed up.

Sources checked 2026-10-12.

How verified

• grep -n -i "cach" skills/prisma-platform-core-concepts/SKILL.md returns nothing.
• git diff origin/main -U0 | grep -E '^[-+] *(library|library_version|version):' returns nothing.
• node scripts/check-skill-packaging.mjs: OK, the prisma tarball carries the skill, stamped and identical to skills/.
• pnpm test was not run locally (this checkout has Node 22; the repo needs 24). No test reads this section; CI runs Test, Type Check and Lint.

Question for maintainers

Once the CLI has a create-db path, or if you agree to name the separate create-db npm package here, should this section point to it? Today packages/cli/src has no create-db command, so rule 1 keeps it out of this PR.

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Summary by CodeRabbit

• Documentation
  • Clarified that automated daily backups are available on paid plans for databases with activity, and that automated backups can be listed and restored only on paid plans.
  • Clarified that per-database usage metrics remain queryable.
  • Removed the mention of optional query caching.

Walkthrough

The Prisma Postgres skill text no longer mentions optional query caching. It specifies that paid plans provide automated snapshots on days when a database has activity. It limits automated, listable, and restorable backups to paid plans. Queryable per-database usage metrics remain in the text.

Priority: ⬇️ Low

Severity of issue fixed: Low

Merge Risk: ⚪ Minimal · up to 142b6

The skill’s Prisma Postgres descriptions now reflect the documented query-caching and backup behavior; the change is ready to merge.

Pre-merge checks · 5

Passed checks (5 passed)

Check name	Status	Explanation
Title check		The title clearly summarizes the two main documentation changes: Prisma Postgres has no query cache, and automated backups are limited to paid plans.
Description check		The description directly explains the file changes, motivation, sources, validation steps, and scope. It is fully related to the changeset.
Linked Issues check		Issue #344 requires removal of the query-caching claim and qualification of both backup statements in skills/prisma-platform-core-concepts/SKILL.md. The reviewed file removes `optional query caching…
Out of Scope Changes check		The change summary reports edits only in skills/prisma-platform-core-concepts/SKILL.md. The edits support Issue #344 by correcting the query-cache and backup statements. The summary reports no comma…
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…

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commit: 142b671

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Inline comments:
Review comments at @skills/prisma-platform-core-concepts/SKILL.md:
- Line 272: Update the automated daily backups description to clarify that
Prisma creates daily snapshots only on days when the database has activity.

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