diff --git a/docs/public/manifest.schema.json b/docs/public/manifest.schema.json
index 8d34cb72..3255a021 100644
--- a/docs/public/manifest.schema.json
+++ b/docs/public/manifest.schema.json
@@ -514,7 +514,9 @@
       "properties": {
         "repo": { "type": "string", "description": "Primary repo to notify (for example org/my-backend)." },
         "workflow": { "type": "string", "description": "Workflow to dispatch (default: external-update.yaml)." },
-        "token": { "type": "string", "description": "Secret name for cross-repo dispatch (default: PRIMARY_REPO_TOKEN)." }
+        "token": { "type": "string", "description": "Secret name for cross-repo dispatch (default: PRIMARY_REPO_TOKEN)." },
+        "deploy_name": { "type": "string", "description": "Deploy name to dispatch when the primary recognizes this satellite under a name that differs from its local deploy/build name. Defaults to the first local deploy name, then the first build name." },
+        "environment": { "type": "string", "description": "Environment to dispatch when the primary expects an environment that differs from the satellite's first local environment. Defaults to the first local environment, then dev." }
       }
     },
     "externalRepoConfig": {
diff --git a/docs/src/content/docs/configuration.md b/docs/src/content/docs/configuration.md
index 423b417e..1e1628d3 100644
--- a/docs/src/content/docs/configuration.md
+++ b/docs/src/content/docs/configuration.md
@@ -429,6 +429,8 @@ ci:
       repo: org/my-backend
       workflow: external-update.yaml
       token: PRIMARY_REPO_TOKEN
+      deploy_name: artifact-a
+      environment: staging
 ```
 
 | Field | Type | Required | Description |
@@ -436,9 +438,13 @@ ci:
 | `repo` | string | Yes | Primary repository to notify |
 | `workflow` | string | No | Workflow name (default: `external-update.yaml`) |
 | `token` | string | No | Secret name for cross-repo dispatch (default: `PRIMARY_REPO_TOKEN`) |
+| `deploy_name` | string | No | Deploy name to dispatch. Set this when the primary recognizes this satellite under a name that differs from its local deploy/build name. Defaults to the first local deploy name, then the first build name. |
+| `environment` | string | No | Environment to dispatch. Set this when the primary expects an environment that differs from the satellite's first local environment (for example a build-only satellite with no environments). Defaults to the first local environment, then `dev`. |
 
 When configured, the orchestrate workflow's finalize job dispatches to the primary repo after deploying to the first environment.
 
+Use `deploy_name` and `environment` when the satellite's local names do not match the external deploy the primary defines. The primary validates the dispatched `deploy_name` and `environment` against its own config, so a satellite whose local build name or environment differs from what the primary expects must send the parent-recognized values here.
+
 **Important:** A repository cannot be both primary (has `external`) and satellite (has `notify`).
 
 ### release Section
diff --git a/internal/config/types.go b/internal/config/types.go
index 095e0c1d..8c405c77 100644
--- a/internal/config/types.go
+++ b/internal/config/types.go
@@ -710,6 +710,17 @@ type NotifyConfig struct {
 	Repo     string `yaml:"repo" json:"repo"`                             // Primary repo to notify (e.g., "org/my-backend")
 	Workflow string `yaml:"workflow,omitempty" json:"workflow,omitempty"` // Workflow to dispatch (default: "external-update.yaml")
 	Token    string `yaml:"token,omitempty" json:"token,omitempty"`       // Secret name for cross-repo dispatch (default: "PRIMARY_REPO_TOKEN")
+	// DeployName, when set, overrides the dispatched deploy_name with the name the
+	// primary recognizes for this satellite. Use it when the satellite's local
+	// build/deploy name differs from the external deploy name in the primary's
+	// config. When empty the deploy_name is derived from the local deploys/builds.
+	DeployName string `yaml:"deploy_name,omitempty" json:"deploy_name,omitempty"`
+	// Environment, when set, overrides the dispatched environment with the
+	// environment the primary recognizes for this satellite's external deploy. Use
+	// it when the satellite's first local environment differs from (or is absent
+	// for build-only satellites) the environment the primary expects. When empty
+	// the environment is derived from the local environments (or defaults to dev).
+	Environment string `yaml:"environment,omitempty" json:"environment,omitempty"`
 }
 
 // GetWorkflow returns the notify workflow name or default
diff --git a/internal/config/types_test.go b/internal/config/types_test.go
index 440ea48b..495ff75c 100644
--- a/internal/config/types_test.go
+++ b/internal/config/types_test.go
@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 	"gopkg.in/yaml.v3"
 )
 
@@ -982,6 +983,32 @@ func TestNotifyConfig_GetToken(t *testing.T) {
 	}
 }
 
+func TestNotifyConfig_DeployNameAndEnvironmentOverrides_RoundTrip(t *testing.T) {
+	const manifest = `repo: example/primary-backend
+workflow: .github/workflows/external-update.yaml
+deploy_name: artifact-a
+environment: staging
+`
+
+	var n NotifyConfig
+	require.NoError(t, yaml.Unmarshal([]byte(manifest), &n))
+
+	assert.Equal(t, "example/primary-backend", n.Repo)
+	assert.Equal(t, "artifact-a", n.DeployName)
+	assert.Equal(t, "staging", n.Environment)
+}
+
+func TestNotifyConfig_Overrides_OmittedWhenUnset(t *testing.T) {
+	const manifest = `repo: example/primary-backend
+`
+
+	var n NotifyConfig
+	require.NoError(t, yaml.Unmarshal([]byte(manifest), &n))
+
+	assert.Empty(t, n.DeployName)
+	assert.Empty(t, n.Environment)
+}
+
 func TestExternalRepoConfig_GetRef(t *testing.T) {
 	tests := []struct {
 		name        string
diff --git a/internal/generate/external_test.go b/internal/generate/external_test.go
index 837bd911..b9811ea6 100644
--- a/internal/generate/external_test.go
+++ b/internal/generate/external_test.go
@@ -861,6 +861,78 @@ func TestNotifyPrimaryStep_BuildOnlySatellite_EmitsDeployName(t *testing.T) {
 		"build-only satellite must emit a non-empty deploy_name (consumer requires it)")
 }
 
+// TestNotifyPrimaryStep_OverridesEmitParentNames verifies that when notify
+// sets deploy_name and environment overrides, the dispatch to the primary's
+// external-update workflow uses the parent-recognized names instead of the
+// satellite's locally-derived build name and first environment. A build-only
+// satellite named "shared" notifying a primary that knows it as external deploy
+// "artifact-a" at environment "staging" must dispatch those parent names, or
+// the primary rejects the dispatch ("external deploy 'shared' not found").
+func TestNotifyPrimaryStep_OverridesEmitParentNames(t *testing.T) {
+	baseDir := t.TempDir()
+	createMockWorkflow(t, baseDir, ".github/workflows/build-shared.yaml")
+
+	cfg := &config.TrunkConfig{
+		TrunkBranch:  "main",
+		Environments: []string{"dev"},
+		Builds: []config.BuildConfig{
+			{Name: "shared", Workflow: ".github/workflows/build-shared.yaml", Triggers: []string{"src/**"}},
+		},
+		Notify: &config.NotifyConfig{
+			Repo:        "example/primary-backend",
+			Workflow:    ".github/workflows/external-update.yaml",
+			DeployName:  "artifact-a",
+			Environment: "staging",
+		},
+	}
+
+	gen := NewGenerator(cfg, baseDir)
+	content, err := gen.Generate()
+	require.NoError(t, err)
+
+	assert.Contains(t, content, "deploy_name: 'artifact-a',",
+		"override must emit the parent-recognized deploy_name, not the local build name")
+	assert.Contains(t, content, "environment: 'staging',",
+		"override must emit the parent-recognized environment, not the local first environment")
+	assert.NotContains(t, content, "deploy_name: 'shared',",
+		"the local build name must not leak into the dispatch when an override is set")
+}
+
+// TestNotifyPrimaryStep_OverridesOffStateByteIdentical verifies that leaving the
+// deploy_name and environment overrides unset produces output byte-identical to
+// the existing derivation, so the additive fields are a no-op when absent.
+func TestNotifyPrimaryStep_OverridesOffStateByteIdentical(t *testing.T) {
+	baseDir := t.TempDir()
+	createMockWorkflow(t, baseDir, ".github/workflows/build-shared.yaml")
+
+	newCfg := func() *config.TrunkConfig {
+		return &config.TrunkConfig{
+			TrunkBranch:  "main",
+			Environments: []string{"dev"},
+			Builds: []config.BuildConfig{
+				{Name: "shared", Workflow: ".github/workflows/build-shared.yaml", Triggers: []string{"src/**"}},
+			},
+			Notify: &config.NotifyConfig{
+				Repo:     "example/primary-backend",
+				Workflow: ".github/workflows/external-update.yaml",
+			},
+		}
+	}
+
+	withoutOverrides, err := NewGenerator(newCfg(), baseDir).Generate()
+	require.NoError(t, err)
+
+	// Same config but with the override fields explicitly empty: must be identical.
+	cfg := newCfg()
+	cfg.Notify.DeployName = ""
+	cfg.Notify.Environment = ""
+	withEmptyOverrides, err := NewGenerator(cfg, baseDir).Generate()
+	require.NoError(t, err)
+
+	assert.Equal(t, withoutOverrides, withEmptyOverrides,
+		"unset overrides must be byte-identical to the existing derivation")
+}
+
 // TestNotifyPrimaryStep_NoStrayDotInJobsAccessor verifies the github-script
 // context accessor uses context.jobs['id'] form with no stray dot before the
 // bracket. The earlier context.jobs.['id'] form is invalid JavaScript and would
diff --git a/internal/generate/generator.go b/internal/generate/generator.go
index c8a1b40c..7f85079b 100644
--- a/internal/generate/generator.go
+++ b/internal/generate/generator.go
@@ -1686,11 +1686,15 @@ func (g *Generator) writeNotifyPrimaryStep(sb *strings.Builder) {
 	sb.WriteString("                source_repo: context.repo.owner + '/' + context.repo.repo,\n")
 
 	// deploy_name is required: true by the primary's external-update consumer, so
-	// it must always be present and non-empty. Prefer the first deploy name
-	// (satellites typically have one deploy); fall back to the first build name
-	// for build-only artifact satellites; otherwise use the satellite's own repo
-	// name from the runtime context as a last-resort identifier.
+	// it must always be present and non-empty. An explicit notify.deploy_name
+	// override wins: it lets a satellite dispatch the name the primary recognizes
+	// when that differs from the satellite's local deploy/build name. Otherwise,
+	// prefer the first deploy name (satellites typically have one deploy); fall
+	// back to the first build name for build-only artifact satellites; otherwise
+	// use the satellite's own repo name from the runtime context as a last resort.
 	switch {
+	case g.config.Notify.DeployName != "":
+		fmt.Fprintf(sb, "                deploy_name: '%s',\n", g.config.Notify.DeployName)
 	case len(g.config.Deploys) > 0:
 		fmt.Fprintf(sb, "                deploy_name: '%s',\n", g.config.Deploys[0].Name)
 	case len(g.config.Builds) > 0:
@@ -1699,9 +1703,15 @@ func (g *Generator) writeNotifyPrimaryStep(sb *strings.Builder) {
 		sb.WriteString("                deploy_name: context.repo.repo,\n")
 	}
 
-	if len(g.config.Environments) > 0 {
+	// An explicit notify.environment override wins: it lets a satellite dispatch
+	// the environment the primary recognizes when that differs from the
+	// satellite's first local environment (or when the satellite has none).
+	switch {
+	case g.config.Notify.Environment != "":
+		fmt.Fprintf(sb, "                environment: '%s',\n", g.config.Notify.Environment)
+	case len(g.config.Environments) > 0:
 		fmt.Fprintf(sb, "                environment: context.payload.inputs?.environment || '%s',\n", g.config.Environments[0])
-	} else {
+	default:
 		sb.WriteString("                environment: 'dev',\n")
 	}
 	sb.WriteString("                sha: context.sha,\n")
diff --git a/internal/schema/manifest.schema.json b/internal/schema/manifest.schema.json
index 8d34cb72..3255a021 100644
--- a/internal/schema/manifest.schema.json
+++ b/internal/schema/manifest.schema.json
@@ -514,7 +514,9 @@
       "properties": {
         "repo": { "type": "string", "description": "Primary repo to notify (for example org/my-backend)." },
         "workflow": { "type": "string", "description": "Workflow to dispatch (default: external-update.yaml)." },
-        "token": { "type": "string", "description": "Secret name for cross-repo dispatch (default: PRIMARY_REPO_TOKEN)." }
+        "token": { "type": "string", "description": "Secret name for cross-repo dispatch (default: PRIMARY_REPO_TOKEN)." },
+        "deploy_name": { "type": "string", "description": "Deploy name to dispatch when the primary recognizes this satellite under a name that differs from its local deploy/build name. Defaults to the first local deploy name, then the first build name." },
+        "environment": { "type": "string", "description": "Environment to dispatch when the primary expects an environment that differs from the satellite's first local environment. Defaults to the first local environment, then dev." }
       }
     },
     "externalRepoConfig": {
diff --git a/schema/manifest.schema.json b/schema/manifest.schema.json
index 8d34cb72..3255a021 100644
--- a/schema/manifest.schema.json
+++ b/schema/manifest.schema.json
@@ -514,7 +514,9 @@
       "properties": {
         "repo": { "type": "string", "description": "Primary repo to notify (for example org/my-backend)." },
         "workflow": { "type": "string", "description": "Workflow to dispatch (default: external-update.yaml)." },
-        "token": { "type": "string", "description": "Secret name for cross-repo dispatch (default: PRIMARY_REPO_TOKEN)." }
+        "token": { "type": "string", "description": "Secret name for cross-repo dispatch (default: PRIMARY_REPO_TOKEN)." },
+        "deploy_name": { "type": "string", "description": "Deploy name to dispatch when the primary recognizes this satellite under a name that differs from its local deploy/build name. Defaults to the first local deploy name, then the first build name." },
+        "environment": { "type": "string", "description": "Environment to dispatch when the primary expects an environment that differs from the satellite's first local environment. Defaults to the first local environment, then dev." }
       }
     },
     "externalRepoConfig": {