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## I have read the [CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md) file. YES ## What kind of change does this PR introduce? Docs update. ## What is the current behavior? Linear: [CLI-1618](https://linear.app/supabase/issue/CLI-1618/update-cli-workflow-docs-for-pg-delta-default-diffing) Four docs pages lag the shipped CLI behavior now that `pg-delta` is the default diff engine for projects created by a recent `supabase init`: - **CLI workflows** claims `db diff` compares `supabase/schemas/` against migrations. Under `pg-delta`, declarative files are never the `db diff` baseline (and `[db.migrations].schema_paths` no longer changes it) — the declarative flow goes through `supabase db schema declarative sync`. The cleanup guidance describes `migra`-era output. - **Declarative database schemas** teaches the old `db diff -f` + `schema_paths` flow throughout, and its known-caveats list is the `migra` issue list. - **Managing environments** still presents `--use-migra` as an "experimental flag" for a "more concise" diff — inverted now. - **Backup and restore (migrating within Supabase)** and the CLI workflows guide both steer users to `db diff`/`db pull` with `--schema auth,storage`. Under `pg-delta`, `--schema` layers an extra exclude policy on top of the Supabase profile: it can only narrow a diff, never re-include managed schemas, and managed-schema selections can even fail closed (e.g. `--schema auth` when a trigger function lives in `public`). Unfiltered diffs are the supported path. ## What is the new behavior? All claims verified against the CLI source at current `develop` — including supabase/cli#6300, which upgraded the engine to `@supabase/pg-delta` 1.0.0-alpha.46 — against the pinned pg-delta package source (profile rules, format defaults, coverage doc), and against a live dogfood run of the documented workflows on `develop` `38f31b4` (two OSS corpus projects, warm shadow cache). - **`cli-workflows.mdx`**: adds a "Which diff engine you're on" note (`pg-delta` for new `supabase init` projects, `migra` for existing ones until they opt in by adding `[experimental.pgdelta] enabled = true`; per-run fallbacks `--use-migra` on `db diff` / `--diff-engine migra` on `db pull`); corrects `db pull` and `db diff` mechanics (shadow built from migrations vs. live database; the baseline history record is offered, not unconditional); switches the declarative flow to `supabase db schema declarative sync`; reworks the cleanup section around pg-delta output (uppercase keywords at max width 180, `format_options`, per-unit migration files with numeric segment suffixes, the `-- pg-delta: transaction=false` directive on genuinely non-transactional files, engine-neutral grant/revoke review guidance, coverage warnings + `--strict-coverage`); documents what pg-delta captures in managed schemas (user triggers, RLS policies on `auth` tables and on `storage.objects`/`storage.buckets`/`realtime.messages`) versus what it doesn't; adds key-command rows for the declarative commands and troubleshooting entries (`db pull` non-zero exit when in sync, the `schema_paths` warning, `PGDELTA_DEBUG=1` bundles under `supabase/.temp/pgdelta/v2/debug/`). - **`declarative-database-schemas.mdx`**: swaps `db diff -f` for `db schema declarative sync -f` throughout; replaces lexicographic/`schema_paths` ordering guidance with automatic dependency ordering and the `generate` export layout (`_cluster/`, reserved `_custom/`); bootstraps from production via `db schema declarative generate --linked` (explicit target + `--overwrite` in scripts) and refreshes via `db pull --declarative`; rewrites known caveats for pg-delta (DML including storage buckets, untracked object kinds + the `_custom/` escape hatch, managed schemas, extension-managed objects, and the two gates when adopting an existing schema tree: `[experimental.webhooks]` for `pg_net` migrations and declaring the tree's extensions) keeping the `migra` workflow and issue list under a legacy section for projects that haven't enabled it. - **`managing-environments.mdx`**: frames the verbose grant sample as legacy-engine output, notes that generated migrations can include grant statements on any engine, describes `--use-migra` as a single-run fallback, and adds a `db diff --strict-coverage` CI step. - **`backup-restore.mdx`**: replaces `db diff --linked --schema auth,storage` with a plain `db diff --linked` on `pg-delta` (keeping the `--schema auth,storage` form for the legacy engine) and explains what the engine includes (user triggers on managed tables, user RLS policies on `auth`, `storage.objects`/`storage.buckets`/`realtime.messages`) and what must be recreated manually. - **New `diff-engines.mdx` page** (from #49889): the single home for how the engine is selected, a behavior matrix for `pg-delta` versus `migra`, the per-command fallback flags, a procedure for switching an existing project (the first `db pull` after enabling may write a catch-up migration), and how to go back with `enabled = false`. Registered in navigation. A shared `diff_engine_check` partial replaces the inline engine parentheticals across seven pages, and a `managed_schemas_diff_capture` partial carries the managed-schema capture rules. - **CLI reference (`cli_v1_commands.yaml`, `cli_v1_config.yaml`)**: `db pull`, `db schema declarative sync`/`generate` flags and descriptions, `experimental.pgdelta.*` and `db.migrations.schema_paths` config keys, and the `db diff` description updated to describe both engines. Note that `cli_v1_commands.yaml` is generated from the CLI repo; [supabase/cli#6557](https://github.com/supabase/cli/pull/6557) carries the matching `db pull` example and overlay text so the next publish keeps it. - **`examples/prompts/declarative-database-schema.md`**: rewritten for the `db schema declarative sync` flow, with the `[experimental.pgdelta]` prerequisite. ## Additional context The first draft was written against pg-delta 1.0.0-alpha.42. supabase/cli#6300 (engine upgrade to alpha.46) then changed two documented behaviors, both reflected here: generated SQL now defaults to uppercase pretty-printed keywords, and user RLS policies on `storage.objects`/`storage.buckets`/`realtime.messages` are included via the engine's `SUPABASE_USER_POLICY_SURFACES` allowlist. A follow-up dogfood run on `develop` `38f31b4` then falsified three more claims (pg-delta emits no grant noise, `_schema_changes`/`_after_enum_values` multi-file names, directive on every split file), all corrected in the last commit. **Update (Sep 14 to 17):** [#49889](https://github.com/supabase/supabase/pull/49889) and [#50220](https://github.com/supabase/supabase/pull/50220) were merged into this branch, so this PR now carries the full stack. #50220 corrected the `schema_paths` warning wording (the CLI warns only when the setting lists paths), added `auth` RLS policies to the managed-schema partial, and described the migra initial pull accurately (the `pg_dump` skips managed schemas and the migra diff pass that follows appends the trigger and policy changes). It also reframed `pg-delta` as the default for every project ahead of supabase/cli#6391. That plan changed: no breaking default flip before Select, so [#50332](https://github.com/supabase/supabase/pull/50332) restores the opt-in framing (`pg-delta` requires `[experimental.pgdelta] enabled = true`, which `supabase init` writes for new projects) and also resolves the four CodeRabbit findings from the latest review round. Two claims are pending confirmation from the owning teams: that branching runs every migration in a transaction and ignores the `-- pg-delta: transaction=false` directive, and the `--db-url` pooler-versus-direct connection advice, which currently disagrees with the CLI's own `db pull` docs. Stale spots found in the CLI repo's own docs while verifying (out of scope here, worth follow-ups): four `SIDE_EFFECTS.md` files still claim lowercase output, `docs/supabase/db/diff.md` still lists `migra`-era "known failure cases" that alpha.46 fully models, the `supabase init` template's commented `format_options` example shows `maxWidth: 80` against an actual default of 180, and the CLI upgrade recipe appends `--experimental` even when the config already enables pg-delta. 🤖 Generated with [Claude Code](https://claude.com/claude-code) https://claude.ai/code/session_01SUuaVmXLRbV6tZjzhka3cp <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit * **Documentation** * Clarified `pg-delta` and legacy `migra` behavior, configuration, and switching guidance. * Expanded declarative schema workflows, including synchronization, migration generation, baselines, deployment, and legacy-engine support. * Documented managed schemas, permissions, extensions, transaction handling, dependency ordering, and troubleshooting. * Added guidance for strict coverage checks, output directories, non-interactive workflows, and declarative pull modes. * Added a dedicated diff engines guide and updated CLI navigation, backup and restore, branching, deployment, and CI documentation. <!-- end of auto-generated comment: release notes by coderabbit.ai --> --------- Co-authored-by: Claude <noreply@anthropic.com> Co-authored-by: Wen Bo Xie <wenbox323@gmail.com>
Supabase
Supabase is the Postgres development platform. We're building the features of Firebase using enterprise-grade open source tools.
- Hosted Postgres Database. Docs
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How it works
Supabase is a combination of open source tools. We’re building the features of Firebase using enterprise-grade, open source products. If the tools and communities exist, with an MIT, Apache 2, or equivalent open license, we will use and support that tool. If the tool doesn't exist, we build and open source it ourselves. Supabase is not a 1-to-1 mapping of Firebase. Our aim is to give developers a Firebase-like developer experience using open source tools.
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Supabase is a hosted platform. You can sign up and start using Supabase without installing anything. You can also self-host and develop locally.
- Postgres is an object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
- Realtime is an Elixir server that allows you to listen to PostgreSQL inserts, updates, and deletes using websockets. Realtime polls Postgres' built-in replication functionality for database changes, converts changes to JSON, then broadcasts the JSON over websockets to authorized clients.
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| Language | Client | Feature-Clients (bundled in Supabase client) | ||||
|---|---|---|---|---|---|---|
| Supabase | PostgREST | GoTrue | Realtime | Storage | Functions | |
| ⚡️ Official ⚡️ | ||||||
| JavaScript (TypeScript) | supabase-js | postgrest-js | auth-js | realtime-js | storage-js | functions-js |
| Flutter | supabase-flutter | postgrest | supabase_auth | supabase_realtime | supabase_storage | supabase_functions |
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| Python | supabase-py | postgrest-py | gotrue-py | realtime-py | storage-py | functions-py |
| 💚 Community 💚 | ||||||
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| Go | - | postgrest-go | gotrue-go | - | storage-go | functions-go |
| Java | - | - | gotrue-java | - | storage-java | - |
| Kotlin | supabase-kt | postgrest-kt | auth-kt | realtime-kt | storage-kt | functions-kt |
| Ruby | supabase-rb | postgrest-rb | - | - | - | - |
| Rust | - | postgrest-rs | - | - | - | - |
| Godot Engine (GDScript) | supabase-gdscript | - | - | - | - | - |
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