---
title: Versions
url: https://platform.claude.com/docs/en/api/go/skills/versions
---

# Versions

## Create Skill Version

`client.Skills.Versions.New(ctx, skillID, params) (*SkillVersion, error)`

**POST** `/v1/skills/{skill_id}/versions`

Create Skill Version

### Parameters

- `skillID string` (path parameter)

  Unique identifier for the skill.

  The format and length of IDs may change over time.

- `params SkillVersionNewParams`

  - `Files []Reader`

    Files to upload for the skill.

    All files must be in the same top-level directory and must include a SKILL.md file at the root of that directory.

  - `WorkspaceID param.Opt[string] Optional` (header parameter)

    Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).

    Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

### Returns

- `type SkillVersion`

  - `Type SkillVersion`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

    default: skill_version

  - `ID string`

    Unique identifier for this Skill Version. The id addresses the version in
    paths and pins it in references.

  - `CreatedAt Time`

    ISO 8601 timestamp of when the skill was created.

    format: date-time

  - `Description string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `Name string`

    The Skill's immutable kebab-case slug, set at creation from the first
    upload's SKILL.md frontmatter `name` (or its enclosing directory). Every
    later upload must resolve to the same value. Also the top-level directory
    of the Skill's mounted files and the base name of a downloaded archive.

  - `SkillID string`

    Unique identifier for the skill.

    The format and length of IDs may change over time.

### Example

```go
package main

import (
	"bytes"
	"context"
	"fmt"
	"io"

	"github.com/anthropics/anthropic-sdk-go"
	"github.com/anthropics/anthropic-sdk-go/option"
)

func main() {
	client := anthropic.NewClient(
		option.WithAPIKey("my-anthropic-api-key"),
	)
	skillVersion, err := client.Skills.Versions.New(
		context.TODO(),
		"skill_id",
		anthropic.SkillVersionNewParams{
			Files: []io.Reader{io.Reader(bytes.NewBuffer([]byte("Example data")))},
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", skillVersion.ID)
}
```

#### Response (200)

```json
{
  "id": "id",
  "created_at": "2024-10-30T23:58:27.427722Z",
  "description": "description",
  "name": "name",
  "skill_id": "skill_01JAbcdefghijklmnopqrstuvw",
  "type": "skill_version"
}
```

## List Skill Versions

`client.Skills.Versions.List(ctx, skillID, params) (*PageCursor[SkillVersion], error)`

**GET** `/v1/skills/{skill_id}/versions`

List Skill Versions

### Parameters

- `skillID string` (path parameter)

  Unique identifier for the skill.

  The format and length of IDs may change over time.

- `params SkillVersionListParams`

  - `Limit param.Opt[int64] Optional` (query parameter)

    Number of results to return per page.

    Ranges from `1` to `1000`. Defaults to `20`.

    minimum: 1, maximum: 1000

  - `Page param.Opt[string] Optional` (query parameter)

    Optionally set to the `next_page` token from the previous response.

  - `WorkspaceID param.Opt[string] Optional` (header parameter)

    Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).

    Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

### Returns

- `type SkillVersion`

  - `Type SkillVersion`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

    default: skill_version

  - `ID string`

    Unique identifier for this Skill Version. The id addresses the version in
    paths and pins it in references.

  - `CreatedAt Time`

    ISO 8601 timestamp of when the skill was created.

    format: date-time

  - `Description string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `Name string`

    The Skill's immutable kebab-case slug, set at creation from the first
    upload's SKILL.md frontmatter `name` (or its enclosing directory). Every
    later upload must resolve to the same value. Also the top-level directory
    of the Skill's mounted files and the base name of a downloaded archive.

  - `SkillID string`

    Unique identifier for the skill.

    The format and length of IDs may change over time.

### Example

```go
package main

import (
	"context"
	"fmt"

	"github.com/anthropics/anthropic-sdk-go"
	"github.com/anthropics/anthropic-sdk-go/option"
)

func main() {
	client := anthropic.NewClient(
		option.WithAPIKey("my-anthropic-api-key"),
	)
	page, err := client.Skills.Versions.List(
		context.TODO(),
		"skill_id",
		anthropic.SkillVersionListParams{},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", page)
}
```

#### Response (200)

```json
{
  "data": [
    {
      "id": "id",
      "created_at": "2024-10-30T23:58:27.427722Z",
      "description": "description",
      "name": "name",
      "skill_id": "skill_01JAbcdefghijklmnopqrstuvw",
      "type": "skill_version"
    }
  ],
  "next_page": "next_page"
}
```

## Get Skill Version

`client.Skills.Versions.Get(ctx, version, params) (*SkillVersion, error)`

**GET** `/v1/skills/{skill_id}/versions/{version}`

Get Skill Version

### Parameters

- `version string` (path parameter)

  Identifies the skill version: a version ID, or the literal `latest` for the skill's most recent version.

  Requests carrying the `skills-2025-10-02` beta header address versions by their Unix epoch timestamp instead (e.g., "1759178010641129").

- `params SkillVersionGetParams`

  - `SkillID string` (path parameter)

    Unique identifier for the skill.

    The format and length of IDs may change over time.

  - `WorkspaceID param.Opt[string] Optional` (header parameter)

    Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).

    Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

### Returns

- `type SkillVersion`

  - `Type SkillVersion`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

    default: skill_version

  - `ID string`

    Unique identifier for this Skill Version. The id addresses the version in
    paths and pins it in references.

  - `CreatedAt Time`

    ISO 8601 timestamp of when the skill was created.

    format: date-time

  - `Description string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `Name string`

    The Skill's immutable kebab-case slug, set at creation from the first
    upload's SKILL.md frontmatter `name` (or its enclosing directory). Every
    later upload must resolve to the same value. Also the top-level directory
    of the Skill's mounted files and the base name of a downloaded archive.

  - `SkillID string`

    Unique identifier for the skill.

    The format and length of IDs may change over time.

### Example

```go
package main

import (
	"context"
	"fmt"

	"github.com/anthropics/anthropic-sdk-go"
	"github.com/anthropics/anthropic-sdk-go/option"
)

func main() {
	client := anthropic.NewClient(
		option.WithAPIKey("my-anthropic-api-key"),
	)
	skillVersion, err := client.Skills.Versions.Get(
		context.TODO(),
		"version",
		anthropic.SkillVersionGetParams{
			SkillID: "skill_id",
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", skillVersion.ID)
}
```

#### Response (200)

```json
{
  "id": "id",
  "created_at": "2024-10-30T23:58:27.427722Z",
  "description": "description",
  "name": "name",
  "skill_id": "skill_01JAbcdefghijklmnopqrstuvw",
  "type": "skill_version"
}
```

## Delete Skill Version

`client.Skills.Versions.Delete(ctx, version, params) (*DeletedSkillVersion, error)`

**DELETE** `/v1/skills/{skill_id}/versions/{version}`

Delete Skill Version

### Parameters

- `version string` (path parameter)

  Identifies the skill version by its version ID.

  Requests carrying the `skills-2025-10-02` beta header address versions by their Unix epoch timestamp instead (e.g., "1759178010641129").

- `params SkillVersionDeleteParams`

  - `SkillID string` (path parameter)

    Unique identifier for the skill.

    The format and length of IDs may change over time.

  - `WorkspaceID param.Opt[string] Optional` (header parameter)

    Optional header to select the Workspace for this request. The value is a Workspace ID (for example, `wrkspc_011CZkZaBF1tNoB5wlCeusgy`).

    Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

### Returns

- `type DeletedSkillVersion`

  - `Type SkillVersionDeleted`

    Deleted object type.

    For Skill Versions, this is always `"skill_version_deleted"`.

    default: skill_version_deleted

  - `ID string`

    Unique identifier for this Skill Version. The id addresses the version in
    paths and pins it in references.

### Example

```go
package main

import (
	"context"
	"fmt"

	"github.com/anthropics/anthropic-sdk-go"
	"github.com/anthropics/anthropic-sdk-go/option"
)

func main() {
	client := anthropic.NewClient(
		option.WithAPIKey("my-anthropic-api-key"),
	)
	deletedSkillVersion, err := client.Skills.Versions.Delete(
		context.TODO(),
		"version",
		anthropic.SkillVersionDeleteParams{
			SkillID: "skill_id",
		},
	)
	if err != nil {
		panic(err.Error())
	}
	fmt.Printf("%+v\n", deletedSkillVersion.ID)
}
```

#### Response (200)

```json
{
  "id": "id",
  "type": "skill_version_deleted"
}
```

## Domain types

### Deleted Skill Version

- `type DeletedSkillVersion`

  - `Type SkillVersionDeleted`

    Deleted object type.

    For Skill Versions, this is always `"skill_version_deleted"`.

    default: skill_version_deleted

  - `ID string`

    Unique identifier for this Skill Version. The id addresses the version in
    paths and pins it in references.

### Skill Version

- `type SkillVersion`

  - `Type SkillVersion`

    Object type.

    For Skill Versions, this is always `"skill_version"`.

    default: skill_version

  - `ID string`

    Unique identifier for this Skill Version. The id addresses the version in
    paths and pins it in references.

  - `CreatedAt Time`

    ISO 8601 timestamp of when the skill was created.

    format: date-time

  - `Description string`

    Description of the skill version.

    This is extracted from the SKILL.md file in the skill upload.

  - `Name string`

    The Skill's immutable kebab-case slug, set at creation from the first
    upload's SKILL.md frontmatter `name` (or its enclosing directory). Every
    later upload must resolve to the same value. Also the top-level directory
    of the Skill's mounted files and the base name of a downloaded archive.

  - `SkillID string`

    Unique identifier for the skill.

    The format and length of IDs may change over time.