Update a Skill

curl --request PATCH \
  --url https://api.checkfu.com/v1/skills/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'checkfu-version: <checkfu-version>' \
  --data '
{
  "expected_version": 1,
  "display_name": "<string>",
  "description": "<string>",
  "instructions": "<string>",
  "files": [
    {
      "path": "<string>",
      "content_base64": "<string>"
    }
  ]
}
'

import requests

url = "https://api.checkfu.com/v1/skills/{id}"

payload = {
    "expected_version": 1,
    "display_name": "<string>",
    "description": "<string>",
    "instructions": "<string>",
    "files": [
        {
            "path": "<string>",
            "content_base64": "<string>"
        }
    ]
}
headers = {
    "checkfu-version": "<checkfu-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PATCH',
  headers: {
    'checkfu-version': '<checkfu-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    expected_version: 1,
    display_name: '<string>',
    description: '<string>',
    instructions: '<string>',
    files: [{path: '<string>', content_base64: '<string>'}]
  })
};

fetch('https://api.checkfu.com/v1/skills/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.checkfu.com/v1/skills/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'expected_version' => 1,
    'display_name' => '<string>',
    'description' => '<string>',
    'instructions' => '<string>',
    'files' => [
        [
                'path' => '<string>',
                'content_base64' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "checkfu-version: <checkfu-version>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.checkfu.com/v1/skills/{id}"

	payload := strings.NewReader("{\n  \"expected_version\": 1,\n  \"display_name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"files\": [\n    {\n      \"path\": \"<string>\",\n      \"content_base64\": \"<string>\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("PATCH", url, payload)

	req.Header.Add("checkfu-version", "<checkfu-version>")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api.checkfu.com/v1/skills/{id}")
  .header("checkfu-version", "<checkfu-version>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"expected_version\": 1,\n  \"display_name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"files\": [\n    {\n      \"path\": \"<string>\",\n      \"content_base64\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/skills/{id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Patch.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"expected_version\": 1,\n  \"display_name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"files\": [\n    {\n      \"path\": \"<string>\",\n      \"content_base64\": \"<string>\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "id": "<string>",
  "workspace_id": "<string>",
  "name": "<string>",
  "kind": "instructional",
  "description": "<string>",
  "instructions": "<string>",
  "files": [
    {
      "path": "<string>",
      "content_base64": "<string>",
      "sha256": "<string>",
      "bytes": 1
    }
  ],
  "version": 1,
  "created_at": "<string>",
  "updated_at": "<string>",
  "display_name": "<string>",
  "status": "active"
}

{
  "error": {
    "type": "validation.malformed",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-malformed"
  }
}

{
  "error": {
    "type": "auth.invalid_key",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
  }
}

{
  "error": {
    "type": "auth.disabled_tenancy",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
  }
}

{
  "error": {
    "type": "validation.not_found",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-not-found"
  }
}

{
  "error": {
    "type": "validation.conflict",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-conflict"
  }
}

{
  "error": {
    "type": "budget.exceeded",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
  }
}

{
  "error": {
    "type": "runtime.internal",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#runtime-internal"
  }
}

Update a Skill

Replace a Skill’s optional non-unique display name, kind, description, instructions, or complete file set, passing expected_version in the body and committing a new immutable version. Set display_name to null to restore presentation from the immutable logical name. File paths follow the create rules: normalized relative POSIX paths, unique destinations, no generated SKILL.md collision, and no file/directory ancestor collision. An edit after Session admission never changes or strands the admitted release: the pinned version stays materializable and the next Session picks up the new content.

Checkfu support posture: alpha; hosted. Required evidence journey: skill-delivery. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities.

PATCH

skills

{id}

Update a Skill

curl --request PATCH \
  --url https://api.checkfu.com/v1/skills/{id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'checkfu-version: <checkfu-version>' \
  --data '
{
  "expected_version": 1,
  "display_name": "<string>",
  "description": "<string>",
  "instructions": "<string>",
  "files": [
    {
      "path": "<string>",
      "content_base64": "<string>"
    }
  ]
}
'

import requests

url = "https://api.checkfu.com/v1/skills/{id}"

payload = {
    "expected_version": 1,
    "display_name": "<string>",
    "description": "<string>",
    "instructions": "<string>",
    "files": [
        {
            "path": "<string>",
            "content_base64": "<string>"
        }
    ]
}
headers = {
    "checkfu-version": "<checkfu-version>",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.patch(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'PATCH',
  headers: {
    'checkfu-version': '<checkfu-version>',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    expected_version: 1,
    display_name: '<string>',
    description: '<string>',
    instructions: '<string>',
    files: [{path: '<string>', content_base64: '<string>'}]
  })
};

fetch('https://api.checkfu.com/v1/skills/{id}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.checkfu.com/v1/skills/{id}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'expected_version' => 1,
    'display_name' => '<string>',
    'description' => '<string>',
    'instructions' => '<string>',
    'files' => [
        [
                'path' => '<string>',
                'content_base64' => '<string>'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json",
    "checkfu-version: <checkfu-version>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.checkfu.com/v1/skills/{id}"

	payload := strings.NewReader("{\n  \"expected_version\": 1,\n  \"display_name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"files\": [\n    {\n      \"path\": \"<string>\",\n      \"content_base64\": \"<string>\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("PATCH", url, payload)

	req.Header.Add("checkfu-version", "<checkfu-version>")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.patch("https://api.checkfu.com/v1/skills/{id}")
  .header("checkfu-version", "<checkfu-version>")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"expected_version\": 1,\n  \"display_name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"files\": [\n    {\n      \"path\": \"<string>\",\n      \"content_base64\": \"<string>\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.checkfu.com/v1/skills/{id}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Patch.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"expected_version\": 1,\n  \"display_name\": \"<string>\",\n  \"description\": \"<string>\",\n  \"instructions\": \"<string>\",\n  \"files\": [\n    {\n      \"path\": \"<string>\",\n      \"content_base64\": \"<string>\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "id": "<string>",
  "workspace_id": "<string>",
  "name": "<string>",
  "kind": "instructional",
  "description": "<string>",
  "instructions": "<string>",
  "files": [
    {
      "path": "<string>",
      "content_base64": "<string>",
      "sha256": "<string>",
      "bytes": 1
    }
  ],
  "version": 1,
  "created_at": "<string>",
  "updated_at": "<string>",
  "display_name": "<string>",
  "status": "active"
}

{
  "error": {
    "type": "validation.malformed",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-malformed"
  }
}

{
  "error": {
    "type": "auth.invalid_key",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
  }
}

{
  "error": {
    "type": "auth.disabled_tenancy",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
  }
}

{
  "error": {
    "type": "validation.not_found",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-not-found"
  }
}

{
  "error": {
    "type": "validation.conflict",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#validation-conflict"
  }
}

{
  "error": {
    "type": "budget.exceeded",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
  }
}

{
  "error": {
    "type": "runtime.internal",
    "message": "<string>",
    "more": "https://docs.checkfu.com/reference/errors#runtime-internal"
  }
}

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Headers

checkfu-version

enum<string>

required

Available options:

2026-08-24

Path Parameters

string

required

Pattern: ^skl_[0-9a-f]{32}$

Body

application/json

expected_version

integer

required

Required range: x > 0

display_name

string | null

An optional non-unique Skill presentation label; clients fall back to the logical name when absent or null.

Required string length: 1 - 255

kind

enum<string>

Available options:

instructional,

executable

description

string | null

Maximum string length: 16384

instructions

string

Maximum string length: 1048576

files

object[]

At most 256 files. Paths must be unique, may not be an ancestor of another path, and may not equal or descend from the generated SKILL.md entry.

Maximum array length: 256

Show child attributes

status

enum<string>

Available options:

active,

archived

Response

Success

string

required

Pattern: ^skl_[0-9a-f]{32}$

workspace_id

string

required

Pattern: ^wrkspc_[0-9a-f]{32}$

name

string

required

Pattern: ^[a-z0-9](?:[a-z0-9._-]{0,93})$

kind

enum<string>

required

Available options:

instructional,

executable

description

string | null

required

Maximum string length: 16384

instructions

string

required

files

object[]

required

Show child attributes

version

integer

required

Required range: x > 0

created_at

string

required

updated_at

string

required

display_name

string | null

An optional non-unique Skill presentation label; clients fall back to the logical name when absent or null.

Required string length: 1 - 255

status

enum<string>

Available options:

active,

archived

Developer tools

Canonical tables

Author protocols

Generated HTTP API

Update a Skill

Authorizations

Headers

Path Parameters

Body

Response