Tailor

Ready-to-wear project templates for GitHub repositories. Tailor fits projects with community health files, security policy, dev tooling, and repository settings that meet GitHub's community standards, then keeps them current with automated alterations. It also ships a Dependabot automerge workflow so patch and minor updates land without manual intervention.

If you manage multiple projects across different GitHub organisations and find that configurations keep drifting out of sync, Tailor fixes that. It is opinionated by design - built for solo devs and small teams who want consistent, well-maintained repositories without the overhead.

This README covers both the CLI and the GitHub Action.

Install

bin

bin install github.com/wimpysworld/tailor
bin update tailor

Requires bin. Tailor releases publish bare executables, no archive extraction needed.

Homebrew

brew install wimpysworld/tap/tailor

Nix

nix run github:wimpysworld/nix-packages#tailor -- --version
nix profile install github:wimpysworld/nix-packages#tailor

To use tailor in a flake configuration, add nix-packages as an input:

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    wimpysworld-nix-packages = {
      url = "github:wimpysworld/nix-packages";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
}

Then reference tailor in your packages:

environment.systemPackages = [
  inputs.wimpysworld-nix-packages.packages.${system}.tailor
];

Available for x86_64-linux, aarch64-linux, and aarch64-darwin.

Docker

docker run --rm ghcr.io/wimpysworld/tailor --version

Images are published to GHCR for linux/amd64 and linux/arm64. Mount your project directory and pass a GitHub token:

docker run --rm \
  -v "$PWD":/work -w /work \
  -e GH_TOKEN \
  ghcr.io/wimpysworld/tailor alter

Native packages

Releases include .deb, .rpm, .apk, and Arch Linux packages. Download the appropriate file from the latest release and install with your system package manager. The AUR package is tailor-bin.

Authentication

Tailor needs a GitHub authentication token. Set GH_TOKEN or GITHUB_TOKEN for CI, or run gh auth login locally.

GitHub Action

The wimpysworld/tailor action installs the tailor binary and optionally runs one or more commands. Pin to a major version tag to receive non-breaking updates automatically.

- uses: wimpysworld/tailor@v0
  with:
    alter: true
  env:
    GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Inputs

Input	Description	Default
`version`	Tailor version to install (e.g. `0.2.0`). Defaults to the version matching the action release.	latest for the pinned major
`fit`	Run `tailor fit` to bootstrap a new project. Requires `GH_TOKEN` in the job env.	`false`
`alter`	Run `tailor alter` to apply swatches and repository settings. Requires `GH_TOKEN` in the job env.	`false`
`baste`	Run `tailor baste` to preview what alter would change. Requires `GH_TOKEN` in the job env.	`false`
`measure`	Run `tailor measure` to check community health files and configuration alignment.	`false`
`docket`	Run `tailor docket` to display authentication state and repository context.	`false`

Token requirements

GITHUB_TOKEN is sufficient for most tailor operations in CI. Two fields are the exception: default_workflow_permissions and can_approve_pull_request_reviews call the PUT /repos/{owner}/{repo}/actions/permissions/workflow endpoint, which requires repository administration access. No permissions: block grants GITHUB_TOKEN this scope - it is a GitHub platform constraint.

When GITHUB_TOKEN is used, tailor skips those fields and reports:

would skip (insufficient scope: token missing required scope): default_workflow_permissions
would skip (insufficient scope: token missing required scope): can_approve_pull_request_reviews

To manage these fields from CI, provide a PAT with the necessary access.

Personal repositories

Create one of the following:

Classic PAT at https://github.com/settings/tokens - enable the repo scope
Fine-grained PAT at https://github.com/settings/personal-access-tokens/new - set "Repository permissions > Administration" to "Read and write"

Organisation repositories

Use the same PAT creation steps above. The PAT must belong to a user with admin access to the repository. If the organisation enforces SSO, authorise the PAT for the org after creation via the token's "Configure SSO" link.

Storing and using the PAT

Add the PAT as a repository secret via Settings > Secrets and variables > Actions, then pass it as GH_TOKEN in the workflow:

env:
  GH_TOKEN: ${{ secrets.TAILOR_TOKEN }}

Supported platforms

Linux (amd64, arm64) and macOS (amd64, arm64).

Version resolution

The version input takes precedence when set. Without it, the action resolves the version from its ref: a full tag such as v0.2.0 pins exactly, while a major tag such as v0 resolves to the latest stable v0.x.x release.

Quick Start

New project

tailor fit ./my-project
cd my-project
tailor alter

fit creates the directory and writes .tailor.yml with the full default swatch set. alter copies the files and applies repository settings. The default licence is BlueOak-1.0.0.

tailor fit ./my-project --license=Apache-2.0
tailor fit ./my-project --license=none
tailor fit ./my-project --description="Short description"

Existing project

cd existing-project
tailor measure                # See what's missing
tailor fit .                  # Create .tailor.yml
tailor alter                  # Apply swatches and settings

measure checks which community health files are present, missing, or need attention. It warns when README.md is absent or when LICENSE contains unresolved placeholders. fit . works in an existing directory without error. If the project has a GitHub remote, fit reads the live repository settings so it preserves anything already configured.

Edit .tailor.yml to add swatches or change alteration modes, then run alter. Set alteration: never on any swatch you want tailor to skip.

Core Concepts

Swatches

Swatches are complete template files embedded in the tailor binary. Most are copied verbatim. Five have tokens substituted at alter time:

File	Token	Resolved from
`.github/FUNDING.yml`	`{{GITHUB_USERNAME}}`	`gh api user`
`SECURITY.md`	`{{ADVISORY_URL}}`	`gh repo view`
`.github/ISSUE_TEMPLATE/config.yml`	`{{SUPPORT_URL}}`	`gh repo view`
`.tailor.yml`	`{{HOMEPAGE_URL}}`	`.tailor.yml`
`.github/workflows/tailor-automerge.yml`	`{{MERGE_STRATEGY}}`	Repository merge settings

Licences are not swatches. They are fetched from the GitHub REST API (GET /licenses/{id}) at alter time and written to LICENSE.

Default swatch set

Swatch	Mode
`.github/workflows/tailor.yml`	`always`
`.github/ISSUE_TEMPLATE/bug_report.yml`	`always`
`.github/ISSUE_TEMPLATE/feature_request.yml`	`always`
`.github/pull_request_template.md`	`always`
`SECURITY.md`	`always`
`CODE_OF_CONDUCT.md`	`always`
`CONTRIBUTING.md`	`always`
`SUPPORT.md`	`always`
`.github/dependabot.yml`	`first-fit`
`.github/FUNDING.yml`	`first-fit`
`.github/ISSUE_TEMPLATE/config.yml`	`first-fit`
`justfile`	`first-fit`
`flake.nix`	`first-fit`
`.gitignore`	`first-fit`
`.envrc`	`first-fit`
`cubic.yaml`	`first-fit`
`.tailor.yml`	`always`
`.github/workflows/tailor-automerge.yml`	`triggered`

Alteration modes

always - Overwrites the file whenever the embedded swatch content differs from what is on disk. Local edits are not preserved.
first-fit - Copies the file only if it does not already exist. Never overwrites. Use this for files you intend to customise after initial delivery.
triggered - Deploys the file only when a condition in the repository settings is met. Overwrites when active, removes the file when the condition becomes false.
never - Skips the file entirely. Use this to suppress a triggered swatch you do not want.

Configuration

All state lives in .tailor.yml with four sections: license, repository, labels, and swatches.

# Initially fitted by tailor on 2026-03-04
license: BlueOak-1.0.0

repository:
  topics:
    - automation
    - developer-tools
    - golang
  has_wiki: false
  has_discussions: false
  allow_squash_merge: true
  delete_branch_on_merge: true
  allow_auto_merge: true
  default_workflow_permissions: read
  can_approve_pull_request_reviews: false

swatches:
  - path: SECURITY.md
    alteration: always

  - path: justfile
    alteration: first-fit

Each swatch entry has two fields:

Field	Description
`path`	File path relative to the project root (also matches the swatch name in the binary)
`alteration`	`always`, `first-fit`, `triggered`, or `never`

Set alteration: never to stop tailor managing a file. The entry stays visible in .tailor.yml and prevents alter --recut from re-adding it.

Repository Settings

The repository section manages GitHub repository settings declaratively. Field names match the GitHub REST API exactly (snake_case). Settings are applied as a single API call on every alter run.

Field	Type	Description
`description`	string	Repository description
`homepage`	string	Repository homepage URL
`has_wiki`	bool	Enable wiki
`has_discussions`	bool	Enable discussions
`has_projects`	bool	Enable projects
`has_issues`	bool	Enable issues
`allow_merge_commit`	bool	Allow merge commits
`allow_squash_merge`	bool	Allow squash merging
`allow_rebase_merge`	bool	Allow rebase merging
`squash_merge_commit_title`	string	`PR_TITLE` or `COMMIT_OR_PR_TITLE`
`squash_merge_commit_message`	string	`PR_BODY`, `COMMIT_MESSAGES`, or `BLANK`
`merge_commit_title`	string	`PR_TITLE` or `MERGE_MESSAGE`
`merge_commit_message`	string	`PR_TITLE`, `PR_BODY`, or `BLANK`
`delete_branch_on_merge`	bool	Delete branch on merge
`allow_update_branch`	bool	Allow updating PR branches
`allow_auto_merge`	bool	Allow auto-merge
`web_commit_signoff_required`	bool	Require sign-off on web commits
`topics`	string[]	Repository topics for discoverability
`default_workflow_permissions`	string	`GITHUB_TOKEN` default permissions: `read` or `write`
`can_approve_pull_request_reviews`	bool	Allow workflows to approve PRs

Omit the repository section entirely to skip settings management.

Labels

The labels section manages GitHub issue labels declaratively. Tailor ships 12 default labels (the 9 GitHub defaults plus dependencies, github_actions, and hacktoberfest-accepted) with colours from the Catppuccin Latte palette.

labels:
  - name: bug
    color: d20f39
    description: "Something isn't working"
  - name: enhancement
    color: 1e66f5
    description: "New feature request"
  - name: dependencies
    color: fe640b
    description: "Dependency update"

Labels are reconciled with create-and-update-only semantics: tailor creates missing labels and updates labels whose colour or description differs, but never deletes labels from the repository. This avoids removing labels already applied to issues.

Omit the labels section to skip label management.

Sponsorships

Tailor places .github/FUNDING.yml as a first-fit swatch, but the GitHub API does not expose the "Sponsorships" checkbox. After running alter, tick Settings > General > Features > Sponsorships manually to display the Sponsor button on the repository.

Automated Maintenance

The .github/workflows/tailor.yml swatch delivers a GitHub Actions workflow that runs tailor alter weekly and opens a pull request when swatch content changes.

name: Tailor 🪡
on:
  schedule:
    - cron: "0 9 * * 1"
  workflow_dispatch:

jobs:
  alter:
    runs-on: ubuntu-slim
    env:
      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - uses: actions/checkout@v4

      - name: Setup tailor
        uses: wimpysworld/tailor@v0

      - name: Alter swatches
        run: tailor alter

      - name: Create PR
        uses: peter-evans/create-pull-request@v6
        with:
          branch: tailor-alter
          title: "chore: alter tailor swatches"

The workflow itself is an always swatch, so it stays current as tailor releases update the template. The action.yml at the repository root installs the binary into the runner.

Branch protection

Branch protection rules and rulesets require Administration: write, which GITHUB_TOKEN cannot hold regardless of permissions: configuration - this is a GitHub platform constraint. Branch protection is out of scope for Tailor; configure it via the GitHub UI or gh api.

Automerge

The .github/workflows/tailor-automerge.yml swatch auto-approves and merges Dependabot pull requests. It deploys automatically when allow_auto_merge: true is set in repository settings and removes itself when the setting is false.

Ecosystem	Patch	Minor	Major
GitHub Actions	Auto-merge	Auto-merge	Auto-merge
All others	Auto-merge	Auto-merge	Skip

GitHub Actions use major version tags as their release convention, so Dependabot reports most action updates as major bumps - restricting to patch and minor would skip the majority. All other ecosystems follow semantic versioning where major indicates breaking changes, so those are left for manual review.

The workflow uses gh pr merge --auto, which waits for all branch protection rules to pass before completing.

Prerequisite: Auto-merge requires branch protection with at least one required status check on the default branch. Without this, gh pr merge --auto merges immediately with no CI gate.

Opt-out: set alteration: never on the automerge swatch entry in .tailor.yml.

Manual catch-up: the workflow supports workflow_dispatch for repositories with pre-existing open Dependabot PRs. Triggering it manually enables auto-merge on all open Dependabot PRs regardless of ecosystem.

Commands

`fit <path>`

Creates a project directory and writes .tailor.yml with the full default swatch set. Does not copy files or apply settings.

tailor fit ./my-project
tailor fit ./my-project --license=Apache-2.0
tailor fit ./my-project --license=none
tailor fit ./my-project --description="Short description"

When a GitHub remote exists, fit queries the live repository configuration for the repository section. Otherwise, built-in defaults are used. Exits with an error if .tailor.yml already exists.

`alter`

Reads .tailor.yml in the current directory and applies repository settings, labels, licence, and swatches. Execution order: repository settings, then labels, then licence, then swatches.

tailor alter            # Apply changes
tailor alter --recut    # Overwrite regardless of mode

--recut overwrites all files including first-fit swatches. LICENSE is exempt (fetched content, not an embedded swatch). For .tailor.yml, --recut appends missing default swatch entries but never modifies existing entries.

`baste`

Previews what alter would do without making changes.

tailor baste

     would set: repository.has_wiki = false
    would copy: LICENSE
 would overwrite: SECURITY.md
     no change: .github/workflows/tailor.yml
skipped (first-fit, exists): justfile
would deploy (triggered: allow_auto_merge): .github/workflows/tailor-automerge.yml

`docket`

Displays the current GitHub authentication state and repository context.

tailor docket

`measure`

Checks community health files and configuration alignment. No network access, no authentication, no .tailor.yml required.

tailor measure

       missing: .github/FUNDING.yml
       warning: LICENSE (contains unresolved placeholders)
       warning: README.md (not managed by tailor)
       present: CODE_OF_CONDUCT.md
not-configured: .github/dependabot.yml
  mode-differs: SECURITY.md (config: first-fit, default: always)

Status	Meaning
`missing`	Health file does not exist on disk
`warning`	Health diagnostic needing attention (missing `README.md` or unresolved licence placeholders)
`present`	Health file exists on disk
`not-configured`	Default swatch not in `.tailor.yml`
`config-only`	Swatch in `.tailor.yml` not in the built-in default set
`mode-differs`	Alteration mode differs from the default

The not-configured, config-only, and mode-differs statuses appear only when .tailor.yml is present.

Name		Name	Last commit message	Last commit date
Latest commit History 188 Commits
.github		.github
cmd/tailor		cmd/tailor
docs		docs
internal		internal
swatches		swatches
.envrc		.envrc
.gitignore		.gitignore
.golangci.yml		.golangci.yml
.goreleaser.yaml		.goreleaser.yaml
.tailor.yml		.tailor.yml
AGENTS.md		AGENTS.md
CLAUDE.md		CLAUDE.md
CODE_OF_CONDUCT.md		CODE_OF_CONDUCT.md
CONTRIBUTING.md		CONTRIBUTING.md
Dockerfile		Dockerfile
LICENSE		LICENSE
README.md		README.md
SECURITY.md		SECURITY.md
SUPPORT.md		SUPPORT.md
action.yml		action.yml
cubic.yaml		cubic.yaml
embed.go		embed.go
flake.lock		flake.lock
flake.nix		flake.nix
go.mod		go.mod
go.sum		go.sum
justfile		justfile

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Tailor

Install

bin

Homebrew

Nix

Docker

Native packages

Authentication

GitHub Action

Inputs

Token requirements

Personal repositories

Organisation repositories

Storing and using the PAT

Supported platforms

Version resolution

Quick Start

New project

Existing project

Core Concepts

Swatches

Default swatch set

Alteration modes

Configuration

Repository Settings

Labels

Sponsorships

Automated Maintenance

Branch protection

Automerge

Commands

fit <path>

alter

baste

docket

measure

About

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`fit <path>`

`alter`

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