GitHub: Create a deployment branch policy

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Operation github.repos_create_deployment_branch_policy

Provider route: POST /repos/{owner}/{repo}/environments/{environment_name}/deployment-branch-policies. Alter supplies the connection’s credentials and routing.

Call through Alter

Install @alter-ai/sdk @alter-ai/github with npm, or alter-sdk-github with pip. Supply your connected customer’s grant ID and the arguments described below.

import { App } from "@alter-ai/sdk";
import { GitHubIntegration } from "@alter-ai/github";

async function execute(input: Parameters<GitHubIntegration["repos"]["reposCreateDeploymentBranchPolicy"]>[0]) {
  const app = new App({ apiKey: process.env.ALTER_API_KEY! });
  try {
    const provider = new GitHubIntegration(app, { grantId: process.env.PROVIDER_GRANT_ID! });
    const call = await provider.repos.reposCreateDeploymentBranchPolicy(input);
    const result = await call.wait();
    return result.bodyJson();
  } finally {
    await app.close();
  }
}

import os
from alter_sdk import App
from alter_sdk_github import GitHubIntegration

async def execute(arguments):
    async with App(api_key=os.environ["ALTER_API_KEY"]) as app:
        provider = GitHubIntegration(app, {"grant_id": os.environ["PROVIDER_GRANT_ID"]})
        call = await provider.repos.repos_create_deployment_branch_policy(arguments)
        result = await call.wait()
        return result.body_json()

Input

Field	Type	Presence	Description and constraints
$	object	Root	Additional keys: not allowed
path	object	Required within parent	Additional keys: not allowed
path.owner	string	Required within parent
path.repo	string	Required within parent
path.environment_name	string	Required within parent
body	Model	Required within parent	Expand Create a deployment branch policy — request body — body

Referenced models: Create a deployment branch policy — request body — body

Response

Response media type: application/json. The table describes the pinned successful response. Referenced models link to their complete fields.

Field	Type	Presence	Description and constraints
$	Model	Root	Expand Get a deployment branch policy — response body

Referenced models: Get a deployment branch policy — response body

Schemas

Get a deployment branch policy — response body

Field	Type	Presence	Description and constraints
$	object	Root	Details of a deployment branch or tag policy.
id	JSON	Optional
id (anyOf 1)	integer	Alternative	The unique identifier of the branch or tag policy.
id (anyOf 2)	string	Alternative	Pattern: ^-?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?$
name	string	Optional	The name pattern that branches or tags must match in order to deploy to the environment.
node_id	string	Optional
type	string	Optional	Whether this rule targets a branch or tag. Known values: branch, tag

Create a deployment branch policy — request body — body

Field	Type	Presence	Description and constraints
$	object	Root
name	string	Required within parent	The name pattern that branches or tags must match in order to deploy to the environment. Wildcard characters will not match `/`. For example, to match branches that begin with `release/` and contain an additional single slash, use `release/*/*`. For more information about pattern matching syntax, see the [Ruby File.fnmatch documentation](https://ruby-doc.org/core-2.5.1/File.html#method-c-fnmatch).
type	string	Optional	Whether this rule targets a branch or tag One of: branch, tag

Policy, approvals and errors

SDK function policy ID: github.repos_create_deployment_branch_policy. Catalog operation: repos/create-deployment-branch-policy. Rules can name either ID; function rules distinguish managed calls and conservatively cover raw calls sharing the route. Existing grant permissions and policy rules apply. wait() returns an immediate result or waits for a required approval; it never approves the request itself. Persist the approval ID to resume after a restart.

Provider errors retain their response; JSON decoding raises ProviderAPIError for provider failures. ManagedOperationError identifies contract/input/retention errors. See error handling and provider-specific behavior. Sensitive input may be refused before approval storage. A decoding error never resubmits a write.

Pinned headers: {"X-GitHub-Api-Version": "2026-03-10", "User-Agent": "Alter", "Accept": "application/vnd.github+json"}

Official provider source