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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>
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