fix: revert canonical schema to use llm_providers for migration compatibility

The CI migrations workflow (up → down → up) failed because 0061 down
renames `providers` back to `llm_providers`, but 0001 down only dropped
`providers` — leaving `llm_providers` as a remnant. On the second
migrate up, 0010 found the stale `llm_providers` and tried to reference
`models.llm_provider_id` which no longer existed.

Revert 0001 canonical schema to use original names (llm_providers,
tts_providers, tts_models) so incremental migrations work naturally and
0061 handles the final rename. Remove EXECUTE wrappers and unnecessary
guards from migrations that now always operate on llm_providers.

db/migrations/0001_init.down.sql

@@ -20,13 +20,12 @@ DROP TABLE IF EXISTS email_outbox;
 DROP TABLE IF EXISTS bot_email_bindings;
 DROP TABLE IF EXISTS email_oauth_tokens;
 DROP TABLE IF EXISTS email_providers;
-DROP TABLE IF EXISTS provider_oauth_tokens;
 DROP TABLE IF EXISTS bots;
 DROP TABLE IF EXISTS memory_providers;
 DROP TABLE IF EXISTS model_variants;
 DROP TABLE IF EXISTS models;
 DROP TABLE IF EXISTS search_providers;
-DROP TABLE IF EXISTS providers;
+DROP TABLE IF EXISTS llm_providers;
 DROP TABLE IF EXISTS user_channel_bindings;
 DROP TABLE IF EXISTS channel_identities;
 DROP TABLE IF EXISTS users;

db/migrations/0001_init.up.sql

@@ -57,21 +57,19 @@ CREATE TABLE IF NOT EXISTS user_channel_bindings (
 
 CREATE INDEX IF NOT EXISTS idx_user_channel_bindings_user_id ON user_channel_bindings(user_id);
 
-CREATE TABLE IF NOT EXISTS providers (
+CREATE TABLE IF NOT EXISTS llm_providers (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   name TEXT NOT NULL,
+  base_url TEXT NOT NULL,
+  api_key TEXT NOT NULL,
   client_type TEXT NOT NULL DEFAULT 'openai-completions',
   icon TEXT,
   enable BOOLEAN NOT NULL DEFAULT true,
-  config JSONB NOT NULL DEFAULT '{}'::jsonb,
   metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
   created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
   updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-  CONSTRAINT providers_name_unique UNIQUE (name),
-  CONSTRAINT providers_client_type_check CHECK (client_type IN (
-    'openai-responses', 'openai-completions', 'anthropic-messages',
-    'google-generative-ai', 'openai-codex', 'edge-speech'
-  ))
+  CONSTRAINT llm_providers_name_unique UNIQUE (name),
+  CONSTRAINT llm_providers_client_type_check CHECK (client_type IN ('openai-responses', 'openai-completions', 'anthropic-messages', 'google-generative-ai', 'openai-codex'))
 );
 
 CREATE TABLE IF NOT EXISTS search_providers (
@@ -89,13 +87,13 @@ CREATE TABLE IF NOT EXISTS models (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   model_id TEXT NOT NULL,
   name TEXT,
-  provider_id UUID NOT NULL REFERENCES providers(id) ON DELETE CASCADE,
+  llm_provider_id UUID NOT NULL REFERENCES llm_providers(id) ON DELETE CASCADE,
   type TEXT NOT NULL DEFAULT 'chat',
   config JSONB NOT NULL DEFAULT '{}'::jsonb,
   created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
   updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-  CONSTRAINT models_provider_id_model_id_unique UNIQUE (provider_id, model_id),
-  CONSTRAINT models_type_check CHECK (type IN ('chat', 'embedding', 'speech'))
+  CONSTRAINT models_provider_model_id_unique UNIQUE (llm_provider_id, model_id),
+  CONSTRAINT models_type_check CHECK (type IN ('chat', 'embedding'))
 );
 
 CREATE TABLE IF NOT EXISTS model_variants (
@@ -122,6 +120,30 @@ CREATE TABLE IF NOT EXISTS memory_providers (
   CONSTRAINT memory_providers_name_unique UNIQUE (name)
 );
 
+-- tts_providers: pluggable TTS service backends
+CREATE TABLE IF NOT EXISTS tts_providers (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  name TEXT NOT NULL,
+  provider TEXT NOT NULL,
+  config JSONB NOT NULL DEFAULT '{}'::jsonb,
+  enable BOOLEAN NOT NULL DEFAULT false,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  CONSTRAINT tts_providers_name_unique UNIQUE (name)
+);
+
+-- tts_models: available models per TTS provider with per-model configuration
+CREATE TABLE IF NOT EXISTS tts_models (
+  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+  model_id TEXT NOT NULL,
+  name TEXT,
+  tts_provider_id UUID NOT NULL REFERENCES tts_providers(id) ON DELETE CASCADE,
+  config JSONB NOT NULL DEFAULT '{}'::jsonb,
+  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_tts_models_provider_id ON tts_models(tts_provider_id);
 
 CREATE TABLE IF NOT EXISTS browser_contexts (
   id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
@@ -157,7 +179,7 @@ CREATE TABLE IF NOT EXISTS bots (
   title_model_id UUID REFERENCES models(id) ON DELETE SET NULL,
   image_model_id UUID REFERENCES models(id) ON DELETE SET NULL,
   discuss_probe_model_id UUID REFERENCES models(id) ON DELETE SET NULL,
-  tts_model_id UUID REFERENCES models(id) ON DELETE SET NULL,
+  tts_model_id UUID REFERENCES tts_models(id) ON DELETE SET NULL,
   browser_context_id UUID REFERENCES browser_contexts(id) ON DELETE SET NULL,
   metadata JSONB NOT NULL DEFAULT '{}'::jsonb,
   created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
@@ -629,20 +651,3 @@ CREATE TABLE IF NOT EXISTS email_outbox (
 
 CREATE INDEX IF NOT EXISTS idx_email_outbox_provider_id ON email_outbox(provider_id);
 CREATE INDEX IF NOT EXISTS idx_email_outbox_bot_id ON email_outbox(bot_id, created_at DESC);
-
--- provider_oauth_tokens: OAuth token storage for providers (e.g. OpenAI Codex OAuth)
-CREATE TABLE IF NOT EXISTS provider_oauth_tokens (
-  id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-  provider_id UUID NOT NULL UNIQUE REFERENCES providers(id) ON DELETE CASCADE,
-  access_token TEXT NOT NULL DEFAULT '',
-  refresh_token TEXT NOT NULL DEFAULT '',
-  expires_at TIMESTAMPTZ,
-  scope TEXT NOT NULL DEFAULT '',
-  token_type TEXT NOT NULL DEFAULT '',
-  state TEXT NOT NULL DEFAULT '',
-  pkce_code_verifier TEXT NOT NULL DEFAULT '',
-  created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-  updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
-);
-
-CREATE INDEX IF NOT EXISTS idx_provider_oauth_tokens_state ON provider_oauth_tokens(state) WHERE state != '';

db/migrations/0010_client_type_to_model.up.sql

@@ -1,36 +1,38 @@
 -- 0010_client_type_to_model
 -- Move client_type from llm_providers to models, rename to new values, drop unsupported types.
--- NOTE: This migration is a no-op on fresh databases where the canonical schema already applies.
 
+-- 1) Add client_type column to models (nullable)
+ALTER TABLE models ADD COLUMN IF NOT EXISTS client_type TEXT;
+
+-- 2-5) Only run data migration when upgrading from old schema that had client_type on llm_providers.
 DO $$
 BEGIN
-  IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'llm_providers') THEN
-    RETURN;
-  END IF;
-
-  IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'models' AND column_name = 'client_type') THEN
-    ALTER TABLE models ADD COLUMN client_type TEXT;
-  END IF;
-
   IF EXISTS (
     SELECT 1 FROM information_schema.columns
     WHERE table_name = 'llm_providers' AND column_name = 'client_type'
   ) THEN
-    EXECUTE '
+    -- Migrate data from provider to model with name mapping
     UPDATE models SET client_type = CASE p.client_type
-          WHEN ''openai'' THEN ''openai-responses''
-          WHEN ''openai-compat'' THEN ''openai-completions''
-          WHEN ''anthropic'' THEN ''anthropic-messages''
-          WHEN ''google'' THEN ''google-generative-ai''
+        WHEN 'openai' THEN 'openai-responses'
+        WHEN 'openai-compat' THEN 'openai-completions'
+        WHEN 'anthropic' THEN 'anthropic-messages'
+        WHEN 'google' THEN 'google-generative-ai'
     END
     FROM llm_providers p
     WHERE models.llm_provider_id = p.id
-        AND p.client_type IN (''openai'', ''openai-compat'', ''anthropic'', ''google'')';
+      AND p.client_type IN ('openai', 'openai-compat', 'anthropic', 'google');
 
-    EXECUTE 'DELETE FROM models WHERE client_type IS NULL AND type = ''chat''';
-    EXECUTE 'DELETE FROM llm_providers WHERE client_type NOT IN (''openai'', ''openai-compat'', ''anthropic'', ''google'')';
+    -- Delete models whose provider had an unsupported client_type
+    DELETE FROM models WHERE client_type IS NULL AND type = 'chat';
+
+    -- Delete providers with unsupported client_type
+    DELETE FROM llm_providers WHERE client_type NOT IN ('openai', 'openai-compat', 'anthropic', 'google');
   END IF;
+END $$;
 
+-- 6) Add CHECK constraints (skip if already present from init migration)
+DO $$
+BEGIN
   IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'models_client_type_check') THEN
     ALTER TABLE models ADD CONSTRAINT models_client_type_check
       CHECK (client_type IS NULL OR client_type IN ('openai-responses', 'openai-completions', 'anthropic-messages', 'google-generative-ai'));
@@ -39,7 +41,8 @@ BEGIN
     ALTER TABLE models ADD CONSTRAINT models_chat_client_type_check
       CHECK (type != 'chat' OR client_type IS NOT NULL);
   END IF;
-
-  EXECUTE 'ALTER TABLE llm_providers DROP CONSTRAINT IF EXISTS llm_providers_client_type_check';
-  EXECUTE 'ALTER TABLE llm_providers DROP COLUMN IF EXISTS client_type';
 END $$;
+
+-- 7) Drop client_type from llm_providers
+ALTER TABLE llm_providers DROP CONSTRAINT IF EXISTS llm_providers_client_type_check;
+ALTER TABLE llm_providers DROP COLUMN IF EXISTS client_type;

db/migrations/0013_model_id_unique_per_provider.up.sql

@@ -1,6 +1,5 @@
 -- 0013_model_id_unique_per_provider
 -- Change model_id uniqueness from global to per provider.
--- NOTE: On fresh databases the canonical schema already has the correct constraint.
 
 DO $$
 BEGIN
@@ -8,11 +7,9 @@ BEGIN
     ALTER TABLE models DROP CONSTRAINT models_model_id_unique;
   END IF;
 
-  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'models_provider_model_id_unique')
-     AND NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'models_provider_id_model_id_unique') THEN
-    IF EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'models' AND column_name = 'llm_provider_id') THEN
-      EXECUTE 'ALTER TABLE models ADD CONSTRAINT models_provider_model_id_unique UNIQUE (llm_provider_id, model_id)';
-    END IF;
+  IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'models_provider_model_id_unique') THEN
+    ALTER TABLE models
+      ADD CONSTRAINT models_provider_model_id_unique UNIQUE (llm_provider_id, model_id);
   END IF;
 END
 $$;

db/migrations/0029_tts_provider.up.sql

@@ -1,54 +1,41 @@
 -- 0029_tts_provider
 -- Add TTS provider/model tables and bots.tts_model_id for existing databases.
--- NOTE: On fresh databases these tables are replaced by unified providers/models via 0061.
 
-DO $$
-BEGIN
-  IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'tts_providers') THEN
-    RETURN;
-  END IF;
-
-  IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'providers') THEN
-    EXECUTE '
 CREATE TABLE IF NOT EXISTS tts_providers (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   name TEXT NOT NULL,
   provider TEXT NOT NULL,
-        config JSONB NOT NULL DEFAULT ''{}''::jsonb,
+  config JSONB NOT NULL DEFAULT '{}'::jsonb,
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
   updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
   CONSTRAINT tts_providers_name_unique UNIQUE (name)
-      )';
+);
 
-    EXECUTE '
 CREATE TABLE IF NOT EXISTS tts_models (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   model_id TEXT NOT NULL,
   name TEXT,
   tts_provider_id UUID NOT NULL REFERENCES tts_providers(id) ON DELETE CASCADE,
-        config JSONB NOT NULL DEFAULT ''{}''::jsonb,
+  config JSONB NOT NULL DEFAULT '{}'::jsonb,
   created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
   updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
   CONSTRAINT tts_models_provider_model_id_unique UNIQUE (tts_provider_id, model_id)
-      )';
+);
 
-    EXECUTE 'CREATE INDEX IF NOT EXISTS idx_tts_models_provider_id ON tts_models(tts_provider_id)';
-  END IF;
-END $$;
+CREATE INDEX IF NOT EXISTS idx_tts_models_provider_id ON tts_models(tts_provider_id);
 
-ALTER TABLE bots ADD COLUMN IF NOT EXISTS tts_model_id UUID;
+ALTER TABLE bots
+  ADD COLUMN IF NOT EXISTS tts_model_id UUID;
 
 DO $$
 BEGIN
   IF NOT EXISTS (
-    SELECT 1 FROM pg_constraint WHERE conname = 'bots_tts_model_id_fkey'
+    SELECT 1
+    FROM pg_constraint
+    WHERE conname = 'bots_tts_model_id_fkey'
   ) THEN
-    IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'tts_models') THEN
-      EXECUTE 'ALTER TABLE bots ADD CONSTRAINT bots_tts_model_id_fkey FOREIGN KEY (tts_model_id) REFERENCES tts_models(id) ON DELETE SET NULL';
-    ELSE
     ALTER TABLE bots
       ADD CONSTRAINT bots_tts_model_id_fkey
-        FOREIGN KEY (tts_model_id) REFERENCES models(id) ON DELETE SET NULL;
-    END IF;
+      FOREIGN KEY (tts_model_id) REFERENCES tts_models(id) ON DELETE SET NULL;
   END IF;
 END $$;

db/migrations/0030_drop_tts_model_unique.up.sql

@@ -1,11 +1,6 @@
 -- 0030_drop_tts_model_unique
 -- Drop unique constraint on (tts_provider_id, model_id) to allow multiple
 -- models with the same model_id under one provider (different configs).
--- NOTE: No-op on fresh databases where tts_models no longer exists.
 
-DO $$
-BEGIN
-  IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'tts_models') THEN
-    EXECUTE 'ALTER TABLE tts_models DROP CONSTRAINT IF EXISTS tts_models_provider_model_id_unique';
-  END IF;
-END $$;
+ALTER TABLE tts_models
+  DROP CONSTRAINT IF EXISTS tts_models_provider_model_id_unique;

db/migrations/0041_provider_model_refactor.up.sql

@@ -1,37 +1,39 @@
 -- 0041_provider_model_refactor
 -- Move client_type to llm_providers, add icon, replace model columns with config JSONB.
--- NOTE: This migration is a no-op on fresh databases where the canonical schema already applies.
 
-DO $$
-BEGIN
-  IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'llm_providers') THEN
-    RETURN;
-  END IF;
-
-  EXECUTE 'ALTER TABLE llm_providers ADD COLUMN IF NOT EXISTS client_type TEXT NOT NULL DEFAULT ''openai-completions''';
-  EXECUTE 'ALTER TABLE llm_providers ADD COLUMN IF NOT EXISTS icon TEXT';
+-- 1. Add client_type and icon to llm_providers
+ALTER TABLE llm_providers
+  ADD COLUMN IF NOT EXISTS client_type TEXT NOT NULL DEFAULT 'openai-completions',
+  ADD COLUMN IF NOT EXISTS icon TEXT;
 
+-- 2–6. Backfill and migrate only when old columns exist (idempotent for fresh DBs).
+DO $$ BEGIN
+  -- Back-fill provider client_type from models.client_type (old column)
   IF EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'models' AND column_name = 'client_type') THEN
-    EXECUTE '
     UPDATE llm_providers p
     SET client_type = sub.client_type
     FROM (
       SELECT DISTINCT ON (llm_provider_id) llm_provider_id, client_type
       FROM models
-        WHERE client_type IS NOT NULL AND client_type != ''''
+      WHERE client_type IS NOT NULL AND client_type != ''
       ORDER BY llm_provider_id, created_at ASC
     ) sub
-      WHERE p.id = sub.llm_provider_id';
+    WHERE p.id = sub.llm_provider_id;
   END IF;
 
+  -- Add CHECK constraint (skip if already present)
   IF NOT EXISTS (SELECT 1 FROM information_schema.table_constraints WHERE constraint_name = 'llm_providers_client_type_check') THEN
-    EXECUTE 'ALTER TABLE llm_providers ADD CONSTRAINT llm_providers_client_type_check CHECK (client_type IN (''openai-responses'', ''openai-completions'', ''anthropic-messages'', ''google-generative-ai''))';
+    ALTER TABLE llm_providers
+      ADD CONSTRAINT llm_providers_client_type_check
+      CHECK (client_type IN ('openai-responses', 'openai-completions', 'anthropic-messages', 'google-generative-ai'));
   END IF;
 
+  -- Add config JSONB to models
   IF NOT EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'models' AND column_name = 'config') THEN
     ALTER TABLE models ADD COLUMN config JSONB NOT NULL DEFAULT '{}'::jsonb;
   END IF;
 
+  -- Migrate existing columns into config (only when old columns exist)
   IF EXISTS (SELECT 1 FROM information_schema.columns WHERE table_name = 'models' AND column_name = 'dimensions') THEN
     UPDATE models SET config = jsonb_strip_nulls(jsonb_build_object(
       'dimensions', dimensions,
@@ -49,16 +51,12 @@ BEGIN
   END IF;
 END $$;
 
-DO $$
-BEGIN
-  IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'llm_providers') THEN
-    RETURN;
-  END IF;
+-- Drop old columns and constraints (IF EXISTS makes these safe on fresh DBs)
 ALTER TABLE models DROP CONSTRAINT IF EXISTS models_client_type_check;
 ALTER TABLE models DROP CONSTRAINT IF EXISTS models_chat_client_type_check;
 ALTER TABLE models DROP CONSTRAINT IF EXISTS models_dimensions_check;
+
 ALTER TABLE models DROP COLUMN IF EXISTS client_type;
 ALTER TABLE models DROP COLUMN IF EXISTS dimensions;
 ALTER TABLE models DROP COLUMN IF EXISTS input_modalities;
 ALTER TABLE models DROP COLUMN IF EXISTS supports_reasoning;
-END $$;

db/migrations/0042_provider_enable.up.sql

@@ -1,10 +1,5 @@
 -- 0042_provider_enable
 -- Add enable column to llm_providers for built-in provider registry support.
--- NOTE: This migration is a no-op on fresh databases where the canonical schema already applies.
 
-DO $$
-BEGIN
-  IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'llm_providers') THEN
-    EXECUTE 'ALTER TABLE llm_providers ADD COLUMN IF NOT EXISTS enable BOOLEAN NOT NULL DEFAULT true';
-  END IF;
-END $$;
+ALTER TABLE llm_providers
+  ADD COLUMN IF NOT EXISTS enable BOOLEAN NOT NULL DEFAULT true;

db/migrations/0046_llm_provider_oauth.up.sql

@@ -1,29 +1,9 @@
 -- 0046_llm_provider_oauth
--- Add OAuth token storage for providers to support OpenAI Codex OAuth.
--- NOTE: On fresh databases, table is named provider_oauth_tokens via 0061.
+-- Add OAuth token storage for LLM providers to support OpenAI Codex OAuth.
 
-DO $$
-BEGIN
-  IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'llm_providers') THEN
-    EXECUTE '
 CREATE TABLE IF NOT EXISTS llm_provider_oauth_tokens (
   id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
   llm_provider_id UUID NOT NULL UNIQUE REFERENCES llm_providers(id) ON DELETE CASCADE,
-        access_token TEXT NOT NULL DEFAULT '''',
-        refresh_token TEXT NOT NULL DEFAULT '''',
-        expires_at TIMESTAMPTZ,
-        scope TEXT NOT NULL DEFAULT '''',
-        token_type TEXT NOT NULL DEFAULT '''',
-        state TEXT NOT NULL DEFAULT '''',
-        pkce_code_verifier TEXT NOT NULL DEFAULT '''',
-        created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
-        updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
-      )';
-    EXECUTE 'CREATE INDEX IF NOT EXISTS idx_llm_provider_oauth_tokens_state ON llm_provider_oauth_tokens(state) WHERE state != ''''';
-  ELSIF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'provider_oauth_tokens') THEN
-    CREATE TABLE IF NOT EXISTS provider_oauth_tokens (
-      id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
-      provider_id UUID NOT NULL UNIQUE REFERENCES providers(id) ON DELETE CASCADE,
   access_token TEXT NOT NULL DEFAULT '',
   refresh_token TEXT NOT NULL DEFAULT '',
   expires_at TIMESTAMPTZ,
@@ -34,6 +14,5 @@ BEGIN
   created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
   updated_at TIMESTAMPTZ NOT NULL DEFAULT now()
 );
-    CREATE INDEX IF NOT EXISTS idx_provider_oauth_tokens_state ON provider_oauth_tokens(state) WHERE state != '';
-  END IF;
-END $$;
+
+CREATE INDEX IF NOT EXISTS idx_llm_provider_oauth_tokens_state ON llm_provider_oauth_tokens(state) WHERE state != '';

db/migrations/0047_add_openai_codex_client_type.up.sql

@@ -1,21 +1,12 @@
 -- 0047_add_openai_codex_client_type
 -- Add openai-codex as a first-class client_type and migrate existing codex-oauth providers.
--- NOTE: This migration is a no-op on fresh databases where the canonical schema already applies.
 
-DO $$
-BEGIN
-  IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'llm_providers') THEN
-    RETURN;
-  END IF;
+ALTER TABLE llm_providers DROP CONSTRAINT IF EXISTS llm_providers_client_type_check;
+ALTER TABLE llm_providers ADD CONSTRAINT llm_providers_client_type_check
+  CHECK (client_type IN ('openai-responses', 'openai-completions', 'anthropic-messages', 'google-generative-ai', 'openai-codex'));
 
-  EXECUTE 'ALTER TABLE llm_providers DROP CONSTRAINT IF EXISTS llm_providers_client_type_check';
-  EXECUTE 'ALTER TABLE llm_providers ADD CONSTRAINT llm_providers_client_type_check
-    CHECK (client_type IN (''openai-responses'', ''openai-completions'', ''anthropic-messages'', ''google-generative-ai'', ''openai-codex''))';
-
-  EXECUTE '
 UPDATE llm_providers
-    SET client_type = ''openai-codex'',
+SET client_type = 'openai-codex',
     updated_at  = now()
-    WHERE client_type = ''openai-responses''
-      AND metadata->>''auth_type'' = ''openai-codex-oauth''';
-END $$;
+WHERE client_type = 'openai-responses'
+  AND metadata->>'auth_type' = 'openai-codex-oauth';

db/migrations/0050_tts_provider_enable.up.sql

@@ -1,10 +1,4 @@
 -- 0050_tts_provider_enable
 -- Add enable column to tts_providers table for toggling providers on/off.
--- NOTE: No-op on fresh databases where tts_providers no longer exists.
 
-DO $$
-BEGIN
-  IF EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'tts_providers') THEN
-    EXECUTE 'ALTER TABLE tts_providers ADD COLUMN IF NOT EXISTS enable BOOLEAN NOT NULL DEFAULT false';
-  END IF;
-END $$;
+ALTER TABLE tts_providers ADD COLUMN IF NOT EXISTS enable BOOLEAN NOT NULL DEFAULT false;