diff --git a/plugins/opencode/api_key.go b/plugins/opencode/api_key.go
new file mode 100644
index 00000000..64865edd
--- /dev/null
+++ b/plugins/opencode/api_key.go
@@ -0,0 +1,31 @@
+package opencode
+
+import (
+	"github.com/1Password/shell-plugins/sdk"
+	"github.com/1Password/shell-plugins/sdk/importer"
+	"github.com/1Password/shell-plugins/sdk/provision"
+	"github.com/1Password/shell-plugins/sdk/schema"
+	"github.com/1Password/shell-plugins/sdk/schema/credname"
+	"github.com/1Password/shell-plugins/sdk/schema/fieldname"
+)
+
+func APIKey() schema.CredentialType {
+	return schema.CredentialType{
+		Name:          credname.APIKey,
+		DocsURL:       sdk.URL("https://opencode.ai/docs/providers/"),
+		ManagementURL: sdk.URL("https://opencode.ai/auth"),
+		Fields: []schema.CredentialField{
+			{
+				Name:                fieldname.APIKey,
+				MarkdownDescription: "OpenCode Zen API key from https://opencode.ai/auth used to authenticate to OpenCode. `OPENCODE_API_KEY` covers only the OpenCode Zen gateway, not BYOK keys such as `ANTHROPIC_API_KEY`.",
+				Secret:              true,
+			},
+		},
+		DefaultProvisioner: provision.EnvVars(defaultEnvVarMapping),
+		Importer:           importer.TryEnvVarPair(defaultEnvVarMapping),
+	}
+}
+
+var defaultEnvVarMapping = map[string]sdk.FieldName{
+	"OPENCODE_API_KEY": fieldname.APIKey,
+}
diff --git a/plugins/opencode/api_key_test.go b/plugins/opencode/api_key_test.go
new file mode 100644
index 00000000..94e292f3
--- /dev/null
+++ b/plugins/opencode/api_key_test.go
@@ -0,0 +1,43 @@
+package opencode
+
+import (
+	"testing"
+
+	"github.com/1Password/shell-plugins/sdk"
+	"github.com/1Password/shell-plugins/sdk/plugintest"
+	"github.com/1Password/shell-plugins/sdk/schema/fieldname"
+)
+
+const exampleAPIKey = "sk-0123456789abcdefghijEXAMPLE"
+
+func TestAPIKeyProvisioner(t *testing.T) {
+	plugintest.TestProvisioner(t, APIKey().DefaultProvisioner, map[string]plugintest.ProvisionCase{
+		"default": {
+			ItemFields: map[sdk.FieldName]string{
+				fieldname.APIKey: exampleAPIKey,
+			},
+			ExpectedOutput: sdk.ProvisionOutput{
+				Environment: map[string]string{
+					"OPENCODE_API_KEY": exampleAPIKey,
+				},
+			},
+		},
+	})
+}
+
+func TestAPIKeyImporter(t *testing.T) {
+	plugintest.TestImporter(t, APIKey().Importer, map[string]plugintest.ImportCase{
+		"environment": {
+			Environment: map[string]string{
+				"OPENCODE_API_KEY": exampleAPIKey,
+			},
+			ExpectedCandidates: []sdk.ImportCandidate{
+				{
+					Fields: map[sdk.FieldName]string{
+						fieldname.APIKey: exampleAPIKey,
+					},
+				},
+			},
+		},
+	})
+}
diff --git a/plugins/opencode/opencode.go b/plugins/opencode/opencode.go
new file mode 100644
index 00000000..cf2309cb
--- /dev/null
+++ b/plugins/opencode/opencode.go
@@ -0,0 +1,26 @@
+package opencode
+
+import (
+	"github.com/1Password/shell-plugins/sdk"
+	"github.com/1Password/shell-plugins/sdk/needsauth"
+	"github.com/1Password/shell-plugins/sdk/schema"
+	"github.com/1Password/shell-plugins/sdk/schema/credname"
+)
+
+func OpencodeCLI() schema.Executable {
+	return schema.Executable{
+		Name:    "OpenCode CLI",
+		Runs:    []string{"opencode"},
+		DocsURL: sdk.URL("https://opencode.ai/docs/"),
+		NeedsAuth: needsauth.IfAll(
+			needsauth.NotForHelpOrVersion(),
+			needsauth.NotWithoutArgs(),
+			needsauth.NotWhenContainsArgs("auth"),
+		),
+		Uses: []schema.CredentialUsage{
+			{
+				Name: credname.APIKey,
+			},
+		},
+	}
+}
diff --git a/plugins/opencode/plugin.go b/plugins/opencode/plugin.go
new file mode 100644
index 00000000..51429bc1
--- /dev/null
+++ b/plugins/opencode/plugin.go
@@ -0,0 +1,22 @@
+package opencode
+
+import (
+	"github.com/1Password/shell-plugins/sdk"
+	"github.com/1Password/shell-plugins/sdk/schema"
+)
+
+func New() schema.Plugin {
+	return schema.Plugin{
+		Name: "opencode",
+		Platform: schema.PlatformInfo{
+			Name:     "OpenCode",
+			Homepage: sdk.URL("https://opencode.ai"),
+		},
+		Credentials: []schema.CredentialType{
+			APIKey(),
+		},
+		Executables: []schema.Executable{
+			OpencodeCLI(),
+		},
+	}
+}