> ## Documentation Index > Fetch the complete documentation index at: https://code.storage/docs/llms.txt > Use this file to discover all available pages before exploring further. # Create Branch > Create a new branch from an existing branch or ref. This is useful for agent workflows, ephemeral previews, or server-side automation where you do not want to clone the repo first. #### JWT claims Required scopes: `git:write` Requires per repo scope: Yes Deprecated: Use `/api/repos/{repo_name}/branches/create` instead. ## OpenAPI ````yaml https://api.pierre.code.storage/api/openapi.json post /api/v1/repos/branches/create openapi: 3.1.0 info: description: >- The Code Storage HTTP API exposes repository management, Git reads, and write workflows over plain HTTPS. ## Authentication Send a signed JWT in the `Authorization: Bearer ` header on every request. - Organisation-scoped endpoints such as `GET /api/repos` require organisation scopes like `org:read` - Repository-scoped endpoints require a JWT whose `repo` claim names the target repository - Write operations require the relevant scope such as `git:write` or `repo:write` ## Pagination List endpoints use cursor-based pagination. - `cursor` is an opaque token returned by the previous response - `limit` defaults to `20` and is capped per endpoint - `has_more` tells you whether another request is available - `next_cursor` becomes the next `cursor` value ## Paths Preferred routes use the shorter `/api/...` form. Legacy `/api/v1/...` aliases remain documented where they are still supported and are marked as deprecated when a preferred route exists. ## Repository names in paths - Names containing `/` (or any other character that is not safe in a URL path segment) **must** be URL encoded so the value occupies a single path segment. For example, `pierre/example` becomes `pierre%2Fexample` and the request URL is `/api/repos/pierre%2Fexample/...`. - Plain names that contain only URL-safe characters can be sent as-is: `/api/repos/dotfiles/...`. - The server URL-decodes the value before resolving the repository, so double-encoding is not required. ## Errors Most endpoints return RFC 9457-compatible problem details under `application/problem+json`, with a legacy `error` field mirrored from `detail`. Streaming commit and note workflows may return operation-specific failure bodies so callers can inspect partial results, branch state, or workflow status without parsing generic error strings. title: code.storage version: 1.0.0 servers: - description: Code Storage tenant cluster url: https://api.{cluster}.code.storage variables: cluster: default: cluster description: >- Tenant cluster identifier (e.g. pierre-dev, pierre-staging, pierre-prod). security: [] tags: - description: Create, inspect, update, delete, and synchronise repositories. name: Repositories - description: Create, delete, list, and compare branches. name: Branches - description: >- Read commit metadata and diffs, or create commits without a local Git client. name: Commits - description: >- Read repository trees, file contents, archives, and server-side search results. name: Files - description: List, create, and delete Git tags. name: Tags - description: Attach and retrieve Git notes for commits or other Git objects. name: Notes - description: >- Trigger upstream synchronisation for repositories backed by an external source. name: Sync - description: Manage generic HTTPS Git credentials for non-GitHub upstreams. name: Credentials paths: /api/v1/repos/branches/create: post: tags: - Branches summary: Create Branch description: >- Create a new branch from an existing branch or ref. This is useful for agent workflows, ephemeral previews, or server-side automation where you do not want to clone the repo first. #### JWT claims Required scopes: `git:write` Requires per repo scope: Yes Deprecated: Use `/api/repos/{repo_name}/branches/create` instead. operationId: create_branch_legacy requestBody: content: application/json: example: base_branch: main base_is_ephemeral: false target_branch: feature/new-onboarding target_is_ephemeral: false schema: additionalProperties: false description: >- Create-branch request body describing the new branch and its base ref. properties: base_branch: description: >- Preferred source branch name. Use base_ref when you need an exact ref. examples: - main type: string base_is_ephemeral: description: >- Whether the base branch should be resolved from the ephemeral namespace. examples: - false type: boolean base_ref: description: >- Optional source ref or revision. This supersedes base_branch when provided. type: string force: description: >- Allow non-fast-forward updates when recreating an existing branch. type: boolean preferred_base: description: >- Optional fallback base branch name used by the backend when it needs another starting point. type: string target_branch: description: Destination branch name. examples: - feature/new-onboarding type: string target_is_ephemeral: description: >- Whether the new branch should be created in the ephemeral namespace. examples: - false type: boolean required: - target_branch type: object description: >- Create a branch from another branch or ref. The source and destination can live in the default namespace or the ephemeral namespace. required: true responses: '200': content: application/json: example: commit_sha: abc123def4567890abc123def4567890abc123de message: branch created target_branch: feature/new-onboarding target_is_ephemeral: false schema: additionalProperties: false description: >- Result of creating a branch, including the resulting ref state. properties: commit_sha: description: Resolved commit SHA at the new branch tip. examples: - abc123def4567890abc123def4567890abc123de type: string message: description: Human-readable result message. examples: - branch created type: string target_branch: description: Destination branch name. examples: - feature/new-onboarding type: string target_is_ephemeral: description: Whether the created branch is ephemeral. examples: - false type: boolean required: - message - target_branch - target_is_ephemeral type: object description: Branch creation result. '400': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Bad Request '401': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Unauthorized '403': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Forbidden '404': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Not Found '409': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Conflict '429': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Too Many Requests '500': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Internal Server Error '503': content: application/json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object application/problem+json: schema: additionalProperties: false description: >- RFC 9457-compatible problem details payload describing the error response. properties: detail: description: >- A human-readable explanation specific to this occurrence of the problem. type: string error: description: >- Legacy compatibility field mirroring `detail` for older clients. type: string instance: description: >- A URI reference that identifies the specific occurrence of the problem. type: string status: description: >- The HTTP status code generated by the origin server for this occurrence of the problem. format: int64 type: integer title: description: A short, human-readable summary of the problem type. type: string type: description: >- A URI reference that identifies the problem type. `about:blank` indicates the generic HTTP status semantics apply. type: string required: - type - title - status type: object description: Service Unavailable deprecated: true security: - bearerAuth: [] components: securitySchemes: bearerAuth: bearerFormat: JWT scheme: bearer type: http ````