feat: initial release

.github/FUNDING.yml

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+github: swaits

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Environment**
+- Neovim version:
+- OS:
+- Config (if relevant):

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: enhancement
+assignees: ''
+---
+
+**Is your feature request related to a problem?**
+A clear and concise description of what the problem is.
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context about the feature request here.

.github/workflows/ci.yml

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+name: CI
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: JohnnyMorganz/stylua-action@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          version: latest
+          args: --check lua/ plugin/
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Neovim
+        run: |
+          wget -q https://github.com/neovim/neovim/releases/download/v0.12.0/nvim-linux-x86_64.appimage -O /tmp/nvim.appimage
+          chmod +x /tmp/nvim.appimage
+          /tmp/nvim.appimage --appimage-extract > /dev/null 2>&1
+          echo "$PWD/squashfs-root/usr/bin" >> $GITHUB_PATH
+      - name: Run tests
+        run: ./scripts/test.sh

.gitignore

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+*.swp
+*.swo
+*~
+.DS_Store
+tags
+deps/

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.1.0] - 2026-04-09
+
+### Added
+
+- Initial release
+- Auto-detect project root via configurable markers
+- Window-local working directory via `lcd`
+- Zero-config auto-loading via `plugin/` directory
+
+[0.1.0]: https://github.com/swaits/tiny-rooter.nvim/releases/tag/v0.1.0

LICENSE

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+MIT License
+
+Copyright (c) 2026 Stephen Waits
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# tiny-rooter.nvim
+
+A tiny project root detector for Neovim 0.12+. Automatically sets the
+local working directory to the project root when opening a file.
+
+Zero config. ~15 lines of Lua.
+
+## Features
+
+- Auto-detects project root via marker files
+- Sets local working directory (`lcd`) per window
+- Ships with a comprehensive default marker list
+- Configurable markers for custom project structures
+- Works out of the box — no setup call required
+
+## Requirements
+
+- Neovim >= 0.12
+
+## Installation
+
+Add to your `vim.pack.add()` call:
+
+```lua
+"https://github.com/swaits/tiny-rooter.nvim",
+```
+
+Done. The plugin auto-loads with sensible defaults.
+
+## Configuration
+
+All options are optional. Call `setup()` only if you want to customize:
+
+```lua
+require("tiny-rooter").setup({
+  markers = { ".git", ".jj", "Cargo.toml", "pyproject.toml", "Makefile", "go.mod", "package.json" },
+})
+```
+
+## Default markers
+
+The default marker list covers most common project types:
+
+| Marker | Ecosystem |
+|--------|-----------|
+| `.git` | Git repositories |
+| `.jj` | Jujutsu repositories |
+| `Cargo.toml` | Rust |
+| `pyproject.toml` | Python |
+| `Makefile` | C/C++ and general |
+| `go.mod` | Go |
+| `package.json` | Node.js |
+
+## How it works
+
+On `BufReadPost` and `BufNewFile`, the plugin calls `vim.fs.root()` with
+the configured markers. If a root is found, it runs `lcd` to set the
+window-local working directory.
+
+## License
+
+[MIT](LICENSE)

doc/tiny-rooter.txt

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+*tiny-rooter.txt*  Auto-detect project root and set local working directory
+
+Author: Stephen Waits <https://github.com/swaits>
+License: MIT
+
+==============================================================================
+CONTENTS                                            *tiny-rooter-contents*
+
+  1. Introduction .............................. |tiny-rooter-introduction|
+  2. Requirements .............................. |tiny-rooter-requirements|
+  3. Installation .............................. |tiny-rooter-installation|
+  4. Configuration ............................. |tiny-rooter-configuration|
+
+==============================================================================
+1. INTRODUCTION                                  *tiny-rooter-introduction*
+
+tiny-rooter.nvim automatically sets the window-local working directory to
+the project root when opening a file. Works out of the box with zero
+configuration.
+
+==============================================================================
+2. REQUIREMENTS                                  *tiny-rooter-requirements*
+
+- Neovim >= 0.12
+
+==============================================================================
+3. INSTALLATION                                  *tiny-rooter-installation*
+
+Add to your |vim.pack.add()| call: >lua
+
+    "https://github.com/swaits/tiny-rooter.nvim",
+<
+That's it. The plugin auto-loads with defaults. To customize, call setup: >lua
+
+    require("tiny-rooter").setup({
+      markers = { ".git", ".jj", "Cargo.toml" },
+    })
+<
+==============================================================================
+4. CONFIGURATION                                *tiny-rooter-configuration*
+
+                                                    *tiny-rooter.setup()*
+setup({opts})
+
+    Optional. The plugin works with defaults if you never call this.
+    Calling setup reconfigures the plugin with the given options.
+
+    All options shown with defaults: >lua
+
+        require("tiny-rooter").setup({
+          markers = {
+            ".git", ".jj", "Cargo.toml", "pyproject.toml",
+            "Makefile", "go.mod", "package.json",
+          },
+        })
+<
+    Parameters: ~
+      {opts}  (table|nil) Configuration table
+
+    Fields: ~
+      {markers}  (table) List of file/directory names that indicate a
+                   project root. Searched upward from the current file.
+                   Default: { ".git", ".jj", "Cargo.toml", "pyproject.toml",
+                   "Makefile", "go.mod", "package.json" }
+
+==============================================================================
+vim:tw=78:ts=8:ft=help:norl:

lua/tiny-rooter/init.lua

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+local M = {}
+
+function M.setup(opts)
+  opts = opts or {}
+  local markers = opts.markers
+    or { ".git", ".jj", "Cargo.toml", "pyproject.toml", "Makefile", "go.mod", "package.json" }
+  vim.api.nvim_create_autocmd({ "BufReadPost", "BufNewFile" }, {
+    group = vim.api.nvim_create_augroup("tiny-rooter", { clear = true }),
+    callback = function()
+      local root = vim.fs.root(0, markers)
+      if root then
+        vim.cmd.lcd(root)
+      end
+    end,
+  })
+end
+
+return M

plugin/tiny-rooter.lua

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+require("tiny-rooter").setup()

scripts/minimal_init.lua

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+-- Minimal init for testing tiny-rooter.nvim
+vim.opt.rtp:prepend(".")
+vim.opt.rtp:prepend("deps/mini.nvim")
+vim.cmd("runtime plugin/tiny-rooter.lua")

scripts/test.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+# Clone mini.nvim for test framework (if not cached)
+if [ ! -d deps/mini.nvim ]; then
+  mkdir -p deps
+  git clone --depth 1 https://github.com/echasnovski/mini.nvim deps/mini.nvim
+fi
+
+# Run tests
+nvim --headless -u scripts/minimal_init.lua -c "lua require('mini.test').setup(); MiniTest.run_file('tests/test_init.lua')"

selene.toml

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+std = "vim"

stylua.toml

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+column_width = 100
+indent_type = "Spaces"
+indent_width = 2
+quote_style = "AutoPreferDouble"

tests/test_init.lua

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+local T = MiniTest.new_set()
+local eq = MiniTest.expect.equality
+
+T["setup"] = MiniTest.new_set()
+
+T["setup"]["creates augroup"] = function()
+  local groups = vim.api.nvim_get_autocmds({ group = "tiny-rooter" })
+  eq(#groups > 0, true)
+end
+
+T["setup"]["is idempotent"] = function()
+  require("tiny-rooter").setup()
+  require("tiny-rooter").setup()
+  local groups = vim.api.nvim_get_autocmds({ group = "tiny-rooter" })
+  eq(#groups > 0, true)
+end
+
+T["setup"]["respects custom markers"] = function()
+  require("tiny-rooter").setup({ markers = { ".git" } })
+  local groups = vim.api.nvim_get_autocmds({ group = "tiny-rooter" })
+  eq(#groups > 0, true)
+end
+
+return T

vim.toml

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+[vim]
+any = true