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docs(tutorial): the deploy config is the composer section of prisma.config.ts - #8415

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@wmadden-electric wmadden-electric commented Oct 8, 2026 •

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The full-stack tutorial now points at the composer section of prisma.config.ts for the deploy config and region.

Before:

prisma-composer.config.ts is the deploy config, which only the CLI reads and your app never imports. It already names the region the first deploy needs to create your project, us-east-1 …

After:

prisma.config.ts is the one config file the Prisma CLI reads, and your app never imports it. … The composer section already names the region the first deploy needs to create your project, us-east-1 …

Why the old text is wrong

Since Composer 0.26.0, Composer reads its configuration from the composer section of prisma.config.ts. A prisma-composer.config.ts next to it is refused with CONFIG.FILE_RETIRED. #8387 updated the Composer pages, but this tutorial changed in parallel and kept the old file.

What the scaffold writes now

create-prisma 0.14.0 (prisma/create-prisma#125) writes a single prisma.config.ts with skills, orm, and composer sections. The region is still set by the scaffold, as prismaCloud({ region: "us-east-1" }) inside the composer section. It writes no prisma-composer.config.ts.

Changes

All in apps/docs/content/docs/(index)/full-stack-tutorial.mdx:

  • The agent prompt (step 4) says the region is in the composer section of prisma.config.ts.
  • Section 2 shows the scaffold's actual prisma.config.ts (Hono, Postgres, Prisma schema authoring) and explains its three sections.
  • "No connection string anywhere" became "no connection string in the declaration", because the shown orm section reads DATABASE_URL. A sentence explains that only the ORM commands that connect to a database directly, such as the db:* scripts, use it.
  • A note says the shown file is for Prisma schema authoring with Claude Code picked for agent skills, and what changes for other choices.
  • Section 5 says the region comes from the composer section of prisma.config.ts.

No other page under apps/docs/content names the old file or a prisma-composer command. Two blog posts still name prisma-composer.config.ts; they are dated articles and are left alone.

lint:links and lint:spellcheck pass. lint:code reports no new findings in this file.

Alternatives considered

  • Deleting the config passage instead of rewriting it. Rejected: the region is the one setting the first deploy needs, and the tutorial tells the reader where to change it.
  • Linking to the Composer getting-started page instead of showing the file. Rejected: the tutorial shows each scaffolded file in full, so the reader can match it against their project.

Linear: TML-3340

Agent: saruman-38
🤖 Generated with Claude Code

Summary by CodeRabbit

  • Documentation
    • Updated the full-stack tutorial to present prisma.config.ts as the unified configuration for ORM settings, agent skills, and Composer deployment settings.
    • Clarified that the Composer region is configured in the composer section.
    • Explained that direct ORM commands use DATABASE_URL, while prisma dev and prisma deploy use the database declared in module.ts.

The full-stack tutorial still said the scaffold writes
prisma-composer.config.ts and that this file sets the deploy region.
Since Composer 0.26.0 that file is refused with CONFIG.FILE_RETIRED, and
create-prisma 0.14.0 writes the deploy config as the composer section of
prisma.config.ts, with prismaCloud({ region: "us-east-1" }).

Linear: TML-3340
Signed-off-by: willbot <w.a.madden+machine@gmail.com>
Signed-off-by: Will Madden <madden@prisma.io>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Review in Change Stack →

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Walkthrough

The full-stack tutorial now presents prisma.config.ts as the configuration file for ORM and Composer. It updates the configuration example, deployment references, and guidance on when ORM commands need DATABASE_URL.

Changes

Full-stack tutorial configuration

Layer / File(s) Summary
Update tutorial configuration example
apps/docs/content/docs/(index)/full-stack-tutorial.mdx
The tutorial combines skills, ORM, and Composer settings in prisma.config.ts. It updates deployment references to use the composer section and clarifies when DATABASE_URL is needed.

Priority: ⬇️ Low

Estimated code review effort: 2 (Simple) | ~8 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to ec9fd

The updated tutorial appears ready to merge after normal checks; no actionable breakage was established.

Architecture Summary

Architecture risk: 🔵 Low · up to 29955

The change affects 1 system.

Changed systems: apps/docs

Architecture concerns
No architecture-level concerns identified.

Review details

Systems and components

  • observed — apps/docs (service) was modified; 1 changed file maps to changed impact.

Before / after behavior

  • observed — Modified behavior in apps/docs/content/docs/(index)/full-stack-tutorial.mdx: The agent prompt now directs readers to the deploy region in the composer section of prisma.config.ts, replacing the reference to prisma-composer.config.ts.
  • observed — Modified behavior in apps/docs/content/docs/(index)/full-stack-tutorial.mdx: The description now distinguishes the two declaration files from prisma.config.ts, which holds deploy configuration, instead of describing a third file specifically for deploys.
  • observed — Modified behavior in apps/docs/content/docs/(index)/full-stack-tutorial.mdx: The config introduction now describes prisma.config.ts as the CLI-read config, with ORM and Composer sections, replacing the description of a separate Composer-only config file.
  • observed — Modified behavior in apps/docs/content/docs/(index)/full-stack-tutorial.mdx: The example replaces prisma-composer.config.ts with prisma.config.ts, combining skills, ORM contract and DATABASE_URL settings, and Composer extensions and state. The Composer region remains us-east-1.
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Title check ✅ Passed The title clearly identifies the tutorial update and the move of deploy configuration to the composer section of prisma.config.ts.
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…s the config shows

The app never imports prisma.config.ts, so the orm section's
DATABASE_URL is read by the ORM commands that connect to a database,
such as the db:* scripts. The shown file reflects Prisma schema
authoring and Claude Code as the skills agent; say so.

Linear: TML-3340
Signed-off-by: willbot <w.a.madden+machine@gmail.com>
Signed-off-by: Will Madden <madden@prisma.io>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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Actionable comments posted: 1


  • 🪄 Fix CodeRabbit comments on this PR
🤖 Prompt to fix review comments
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @apps/docs/content/docs/(index)/full-stack-tutorial.mdx:
- Line 147: Update the opening sentence in the tutorial to describe
prisma.config.ts as this project’s local Prisma CLI configuration file, rather
than implying it is the only configuration file the CLI reads; preserve the
statement that the app never imports it.

After applying the fix, consider running `coderabbit review --agent` for local
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Comment thread apps/docs/content/docs/(index)/full-stack-tutorial.mdx Outdated
…he only one the CLI reads

Linear: TML-3340

Signed-off-by: willbot <w.a.madden+machine@gmail.com>
Signed-off-by: Will Madden <madden@prisma.io>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
@wmadden
wmadden merged commit bcc18b0 into main Oct 8, 2026
27 checks passed
@wmadden
wmadden deleted the docs/full-stack-tutorial-composer-section branch October 8, 2026 16:28
RyanGarber pushed a commit to RyanGarber/prisma-orm-tmep that referenced this pull request Oct 9, 2026
```
$ git diff --stat main...HEAD | tail -1
 25 files changed, 1 insertion(+), 2833 deletions(-)
```

This closes the one-config-file project. It deletes the project's
working folder, `projects/one-config-file/`, and fixes one duplicate
number in the failure-mode catalogue. Linear: TML-3340.

The project moved Prisma Composer's configuration out of its own
`prisma-composer.config.ts` into the `composer` section of
`prisma.config.ts`, and deleted Composer's standalone `prisma-composer`
binary. Prisma 8 now has one CLI and one config file. The rest of this
description is the close-out record the Drive process asks for: what was
checked, where each decision now lives, and where each unfinished item
is tracked.

## What was delivered

| PR | What it did |
| --- | --- |
| prisma/composer#328 | Composer's configuration is the `composer`
section of `prisma.config.ts`. The old file and `configPath` are
refused. |
| prisma/composer#331 | The `prisma-composer` binary is gone. Docs,
examples and the shipped skill say `prisma deploy` and `prisma dev`.
Released as Composer 0.26.0. |
| prisma/prisma-cli#330 | The `prisma` host runs Composer 0.26.0.
Released as `prisma@8.0.0-rc.20`. |
| prisma/web#8387 | The public Composer docs describe the `composer`
section. |
| prisma/composer#332 | Found during testing: `prisma dev` and `prisma
deploy` failed in pnpm projects. Merged, not yet released (TML-3520). |
| prisma/composer#333 | An emulator test race that made CI flaky, plus
`PRISMA_COMPOSER_EMULATORS_DIR`. |

Three more PRs came out of this close-out and are open:

- prisma/composer#347 writes ADR-0050, which records the binary's
retirement. Without it the close-out failed the ADR audit, and four
older ADRs still described `prisma-composer` as the entry point.
- prisma/web#8415 fixes a tutorial page that still told readers to write
`prisma-composer.config.ts`.
- prisma/pdp-control-plane#5608 makes the platform's Compute import flow
write the `composer` section into `prisma.config.ts`, and recognise
repositories that already have it. Until now it wrote
`prisma-composer.config.mjs` and pinned Composer 0.25.0, so imported
repositories broke on upgrading to 0.26.0.

## Definition of Done

| Item | Verdict | Evidence |
| --- | --- | --- |
| orm-demo has one config file, and `prisma deploy` and `prisma dev` run
against it from the host | Met, with deviations | `examples/orm-demo`
has only `prisma.config.ts`. `prisma dev` from the host build reached
ready (slice 3 QA). A real `prisma deploy` of orm-demo succeeds in
Composer's e2e workflow on `main`, using the published host with the
workspace family. No deploy ran from the host build itself, because no
service token was available. |
| The old file and `configPath` get their diagnostics | Met, with a
deviation | `CONFIG.FILE_RETIRED` and `CONFIG.FIELD_RETIRED`, exit 2,
from the host binary. Shown with `prisma dev`, because `deploy` checks
credentials before reading the config. Both commands use the same
validator. |
| A broken `effect` install fails with `CLI.CONFIG_UNREADABLE`, and
`prisma --version` still works | Met, with the same deviation | Slice 3
QA, step 5. |
| Published packages have no `bin` and no stale name | Met |
`@prisma/composer-cli` and `@prisma/composer` 0.28.0 declare no `bin`.
Their unpacked tarballs name the old file only in the messages that
refuse it. |
| A CI check keeps the old name out | Met | `pnpm
lint:retired-binary-name` runs in CI. Its test plants a mention and
expects a failure. |
| TML-3340 Done, web pages updated | Met | TML-3340 is Done with a
closing comment. One page missed by #8387 is fixed in prisma/web#8415. |
| The consolidation plan says `deploy` and `dev` stay bare | Met |
`projects/consolidate-clis/cli-consolidation-plan.md`, and now ADR-0050
in prisma/composer. |
| Retro run, ADR merged, folder deleted | Met once #347 and this PR
merge | The retro's lesson is failure mode F42. ADR-0049 is merged.
ADR-0050 is in #347. |
| Repository references to the folder removed | Met | Nothing outside
the folder links to it. |
| Manual QA for each user-facing slice | Met, with a deviation | Slice 3
has a QA transcript. Slices 1 and 2 recorded their manual QA in the
Verification sections of #328 and #331. |

## Where each decision lives now

Every decision recorded in the deleted spec and design notes has a home
outside the folder:

- **Composer's configuration is the `composer` section, validated by the
section, with the old file and field refused:** ADR-0049, and the
`CONFIG` code list in ADR-0044.
- **The `effect` version pre-flight is deleted; a broken tree fails with
the engine's error:** ADR-0049. #347 adds the four rejected
alternatives, which until now were only in #328's description.
- **The binary is retired, and `destroy` and `log` stay programmatic:**
ADR-0050 in #347.
- **`deploy` and `dev` stay bare commands; `destroy` is not mounted:**
ADR-0050, and the consolidation plan.
- **The examples' `destroy` scripts keep `--production` and `--stage`:**
ADR-0050 records this as a repository-internal script grammar, not a
public command.
- **Examples and CI run the published host with a workspace override:**
`gotchas.md` and `scripts/check-cli-engine-pin*.mjs` in prisma/composer,
which enforce it.
- **Composer runs the `alchemy` installed beside `@prisma/composer`:**
ADR-0007's amendment and `docs/design/10-domains/deploy-cli.md` in
prisma/composer.

## Deferred items and their tickets

| Ticket | Item |
| --- | --- |
| TML-3520 | Release Composer 0.29.0 and pin it in the host, so
`prisma@latest` gets the pnpm fix. |
| TML-3521 | Teardown and logs have no `prisma` command. |
| TML-3522 | Two checkouts of one app still share a local Postgres
server. |
| TML-3523 | A compute emulator test is too tight on time and flakes
under load. |
| TML-3524 | Composer's examples pin an older `prisma` host than
`latest`. |
| TML-3525 | Drop the exact `effect` pin once `effect` 4 is stable or
Alchemy pins its peer. |
| TML-3526 | dependency-cruiser skips the examples' `prisma.config.ts`.
|
| TML-3527 | Edge cases in how Composer starts Alchemy. |
| TML-3528 | prisma/asks and prisma/streams still use the retired config
or command. |

Two smaller review notes are accepted without tickets. The prisma-cli
conformance check needs a new exception on each joint engine release,
which is visible when it happens. Windows edge cases are out of scope,
because Windows is documented as unsupported for local tooling.

## What this PR deletes

Every file under `projects/one-config-file/` is transient under
`drive/project/README.md`: the spec, plan, design notes, retro log,
README, and each slice's spec, plan, grounding notes, reviews and QA
transcript. None is methodology to migrate. The decisions are mapped
above. The full files stay readable in the history of prisma/orm#30536.

## The failure-mode number

The retro added its lesson to `drive/calibration/failure-modes.md` as
F39. prisma/orm#30613 had already used F39 two days earlier. This PR
renumbers ours to F42, the next free number.

Agent: saruman-38

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Signed-off-by: willbot <w.a.madden+machine@gmail.com>
Signed-off-by: Will Madden <madden@prisma.io>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

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