devstuff

A Python-based CLI for managing your Linux development environment. Install, remove, and track developer tools from a single command — with an interactive picker, a guided wizard for adding custom packages, and a consistent Rich terminal UI.

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Prerequisites

Requirement	Notes
OS	Ubuntu 20.04+ or Debian 11+ (amd64)
Python	3.11 or later
curl	Used by script-based installers (Docker, NVM, uv, etc.)
sudo	Required for tools that write to system paths (/usr/local/bin, apt packages)
ca-certificates	For HTTPS downloads — present on most systems by default

These are available on any standard Ubuntu/Debian install. On a fresh minimal image, run:

sudo apt-get install -y python3 python3-pip curl ca-certificates sudo

Optional — only needed when using specific install types:

Requirement	When
git	git-type custom packages (devstuff add → git)
node / npm	npm-type custom packages
uv	Running from source via ./devstuff (auto-installed if missing)

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Installation

From PyPI (recommended)

The simplest install — no git clone required, Python 3.11+ is the only prerequisite:

# pipx gives the tool its own isolated environment (preferred)
pipx install devstuff

# or plain pip
pip install devstuff

After install, devstuff is the command. Run devstuff --help to verify.

Diagnosing and repairing (devstuff doctor)

devstuff doctor runs a battery of health checks and reports the status of each. Checks that can be auto-fixed are offered for repair interactively, or applied all at once with --fix. Use --check-only for a read-only report (no fixes offered).

devstuff doctor              # run checks, offer to fix problems
devstuff doctor --fix        # run checks and auto-apply every available fix
devstuff doctor --check-only # report only, don't offer or apply fixes

The checks cover:

Check	What it verifies	Auto-fixable
python-version	Python 3.11+	—
runtime-deps	click, pyyaml, rich, questionary importable	—
config-dir	~/.config/devstuff exists and is writable	create it
bundled-tools-catalog	bundled tools.yaml loads and validates	—
user-tools-catalog	user tools.yaml (if present) is valid	—
bundled-functions-catalog	bundled functions.yaml loads and validates	—
user-functions-catalog	user functions.yaml (if present) is valid	—
bundled-agent-catalog	bundled agent_tools.yaml loads and validates	—
user-agent-catalog	user agent_tools.yaml (if present) is valid	—
registry	effective catalog builds into tool objects; is_installed() probes don't crash	—
bashrc	~/.bashrc is writable (needed by configurators and functions enable)	—
stale-executable	no stale dev-setup command on $PATH	remove symlink
stale-packages	no old dev-setup install reported by uv/pipx	uninstall
old-dirs	no old ~/.config/dev-setup or ~/.local/share/dev-setup	move to devstuff
stale-bashrc-blocks	no stale # dev-setup: / # dev-setup-fn: blocks in ~/.bashrc	remove

The last four checks detect leftover artifacts from pre-v1.19 installs (when the package shipped a dev-setup command alias and used ~/.config/dev-setup paths). doctor --fix cleans them up: it uninstalls old dev-setup packages from uv/pipx, removes stale symlinks (refusing to touch one that points into the current devstuff install), moves old config/data directories to the new devstuff paths, and strips stale bashrc blocks — verifying each fix before moving on.

Manual cleanup (pre-v1.19 artifacts)

If you prefer to clean up by hand, or doctor can't fix something automatically:

1. Uninstall the old package(s). The exact command depends on how you installed it:

   # uv tool (check first with: uv tool list)
   uv tool uninstall dev-setup devstuff
   
   # pipx
   pipx uninstall dev-setup
   pipx uninstall devstuff
   
   # plain pip
   pip uninstall dev-setup devstuff
   

   This removes the now-defunct dev-setup executable from ~/.local/bin (a stale symlink there will keep resolving to the old version otherwise).

2. Install the current version (see From PyPI above).

3. Move your config and data to the new paths (only if they exist on your machine):

   [ -d ~/.config/dev-setup ]      && mv ~/.config/dev-setup ~/.config/devstuff
   [ -d ~/.local/share/dev-setup ] && mv ~/.local/share/dev-setup ~/.local/share/devstuff
   

   Your tools.yaml, functions.yaml, agent.yaml, and agent_tools.yaml catalogs move with the directory and are picked up automatically on the next run.

4. Clean up stale ~/.bashrc blocks. The bashrc patch markers were renamed, so devstuff remove / devstuff functions disable won't find blocks written by the old version. Search for and remove any leftover blocks:

   # Show any old blocks still in your bashrc:
   grep -nE '# dev-setup:|# dev-setup-fn:' ~/.bashrc
   

   Then either delete those blocks manually (each is a # <marker> line followed by its content up to the next blank line), or re-run the relevant configurator / devstuff functions enable <key> to write a fresh block under the new marker and remove the old one by hand. The bat configurator's block marker changed from dev-setup: bat to devstuff: bat; function blocks changed from dev-setup-fn:<key> to devstuff-fn:<key>.

From source (development)

git clone <repo-url> ~/dev-setup-py
cd ~/dev-setup-py
bash install.sh   # installs from PyPI via pipx or pip

Or to run directly from the cloned repo without installing:

./devstuff list   # creates a .venv on first run, then stays fast

The ./devstuff bash script requires Python 3.11+ and creates a local .venv automatically. On Debian/Ubuntu, if python3-venv is not installed, it falls back to uv venv if uv is available.

For editable development installs:

pip install -e .
devstuff list

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How it works

When installed from PyPI (via pip or pipx), devstuff is a standard Python entry point — Python is the only runtime dependency. The [project.scripts] entry in pyproject.toml maps devstuff directly to dev_setup.__main__:main.

The bash ./devstuff script in the repo is a convenience runner for the git-clone workflow. It creates a .venv using python3 -m venv (falling back to uv venv on systems where python3-venv is a separate package) and installs the project in editable mode on first run.

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Verbose output (-v / -vv)

Every command accepts -v, before or after the subcommand. devstuff is a thin layer over other people's commands; this is how you see them.

devstuff install lazygit -v      # log each command and stream its output live
devstuff -vv run whats-on-port 8080   # + probes, exit codes, and bash -x line tracing
DEVSTUFF_VERBOSE=1 devstuff update    # same as -v, for scripts and CI

Level	What you get
(default)	Normal output. Command output is captured and shown only if the command fails.
-v	Every command devstuff runs, printed as a line you can paste back into a shell, with its output streaming live. Spinners are replaced by plain lines so they don't fight with that output.
-vv	Plus read-only probes (version checks, install-state checks) with their exit codes and output, the body of any script before it runs, resolved function parameters, and bash -x tracing of every line inside function and installer scripts.

-vvv and above are the same as -vv.

All of it goes to stderr, so it never contaminates anything you pipe or capture — including eval "$(devstuff run <shell-eval function>)", whose stdout has to be shell code and nothing else.

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Commands

list

Show all available packages with their install status, type, version, and help command.

devstuff list                    # all packages
devstuff list core               # core category only
devstuff list tools              # tools category only
devstuff list custom             # custom/user-added packages only
devstuff list --installed        # only installed packages
devstuff list --available        # only packages not yet installed

Output columns: status (✔/✘), package key, description, install type, version (if installed), help command.

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install

Install one or more packages by key, or launch an interactive multi-select picker.

devstuff install docker nvm      # install specific packages
devstuff install                 # interactive picker (Space to toggle, Enter to confirm)

The interactive picker shows all available packages with their current install status and lets you select multiple at once before confirming.

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remove

Uninstall an installed package. Always asks for confirmation before proceeding.

devstuff remove htop
devstuff uninstall htop          # alias

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update

Update one or more already-installed packages to the latest version, or pin a single package to a specific version with --version. With no arguments, launches an interactive multi-select picker over installed packages, similar to install.

devstuff update nvm                    # update to latest
devstuff update pi --version 1.2.3     # pin a single package to a specific version
devstuff update                        # interactive picker

Packages that aren't installed are skipped with a warning rather than treated as an error. --version can only be combined with a single package (and is not available in the interactive picker).

The interactive picker probes every installed package for a newer version (npm view, uv tool list --outdated, apt-cache policy, or comparing local vs. remote git HEAD) and pre-checks the ones with a known update available. script/bash packages have no reliable way to check for a newer version ahead of time, so they're listed as "unknown" and left unchecked — selecting one still works, it just can't be pre-recommended.

How "update" is performed depends on the package's install type:

Type	Latest	Specific version
npm	npm install -g <pkg>@latest	npm install -g <pkg>@<version>
pip / uvx	uv tool upgrade <pkg>	uv tool upgrade <pkg>==<version>
apt	apt-get install --only-upgrade	apt-get install <pkg>=<version> (single package only)
git	git pull (+ re-run git_install_cmd)	not supported — repos are cloned shallow (--depth=1)
script / bash	Re-runs the install script	not supported — no version parameter to inject

For script/bash packages, "update" is a full reinstall (the same script that may have used sudo runs again), since there's no narrower update mechanism available. devstuff update asks for confirmation before doing this.

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configure

Set up an installed tool through a guided wizard, previewing the result before anything is written. Installing a tool that has a wizard also offers to run it there and then.

devstuff configure                       # pick from the tools that have a wizard
devstuff configure starship              # run starship's prompt wizard
devstuff configure --list                # which tools have a wizard
devstuff configure starship --path       # print the config file path
devstuff configure starship --output /tmp/try.toml   # write elsewhere, leave the live config alone

Tool	What it configures
ansible	ansible.cfg — inventory paths, forks, pipelining, become and vault
bat	Theme, decorations, paging, and the man-page/cat shell integration
commitizen	Commit types, what each one bumps, git tags, and changelog sections
docker	daemon.json — log rotation, address pools and daemon behaviour
lazygit	Icons, diff pager, panels and git behaviour
pre-commit	Which git hooks run, when they run, and what they're allowed to rewrite
starship	Prompt style, colour palette, which sections appear, and layout

Each wizard checks its result against the real tool before saving. What that check can prove varies a lot, and the wizards say so rather than implying more than they know:

Tool	What the tool itself checks	What the wizard has to check instead
ansible	unknown keys, unknown sections, wrong types	whether ansible actually read each setting (ansible-config dump) — a key in a retired section validates and does nothing
bat	a bad --style component (hard error)	theme names — a bad theme is a stderr warning and exit 0, so a typo silently gives you the default forever
docker	key typos, malformed CIDRs, numeric log options	five configs dockerd --validate accepts that stop every container from starting
lazygit	wrong types (refuses to start)	unknown keys and invalid enum values — both silently ignored
pre-commit	the file's shape	hook ids — validate-config never opens a repository

Commitizen wizard

Commitizen needs a config file before it does anything, and everything past its built-in Conventional Commits rules means cz_customize — nine coupled regexes where bump_map's keys are matched against group 1 of bump_pattern, the two breaking-change rules have to come first because commitizen stops at the first key that matches, and schema_pattern has to accept whatever message_template produces. Get the order wrong and feat(api)!: quietly ships as a minor release.

The wizard asks about commit types and version rules, and derives all nine settings from the answers:

Step	Options
Convention	cz_conventional_commits (commitizen's fixed rules — nothing to configure) · cz_customize (your types, your bump rules)
Commit types	Checkbox over feat, fix, refactor, perf, docs, style, test, build, ci (all on, matching Conventional Commits) plus chore, revert, deps, security — and you can add your own
Per type	What it bumps (MAJOR / MINOR / PATCH / no release), whether it appears in the changelog, under which heading, and its hotkey in cz commit
Versioning	Where the version lives (commitizen, scm, pep621, uv, poetry, cargo, npm, composer) · scheme (semver, semver2, pep440) · tag format · other files carrying the version
Release	Changelog on bump · 0.x mode · annotated tags · GPG signing · incremental changelog · prerelease merging · allow_abort · hotkeys · changelog file · bump commit message
Prompt	Which questions cz commit asks — scope, body, footer
Destination	pyproject.toml (spliced in place) or a standalone .cz.toml

The custom branch starts as an exact copy of Conventional Commits — the built-in type table reproduces commitizen.defaults.BUMP_MAP and its picker, read out of the installed package and pinned by a test. Switching to custom to add one type does not cost you the convention.

Before it asks anything, the wizard reads the project: git root, any existing commitizen config (in commitizen's own search order, ignoring files without a commitizen section), the version provider and current version from pyproject.toml/package.json/Cargo.toml/composer.json, the latest git tag, and an existing changelog.

The review screen shows a sample cz commit message, the bump table, and the changelog sections:

  what each type does to 1.4.2

  commit                       increment  new version
  feat: …                      MINOR      1.5.0
  fix: …                       PATCH      1.4.3
  docs: …                      —          1.4.2
  feat!: …                     MAJOR      2.0.0
  BREAKING CHANGE: … (footer)  MAJOR      2.0.0

That table is checked against the real thing. "Check these rules against the real cz" builds a throwaway git repo tagged at 1.4.2, replays one commit per bump level plus both breaking forms through cz bump --dry-run, and reports whether commitizen agrees rule by rule. The same check runs automatically before saving — a disagreement is reported and asks for confirmation, but never blocks the save. "Preview a generated changelog" runs the real cz changelog --dry-run over one sample commit per type. Without cz installed the wizard still works; the checks say so rather than failing.

On save:

• Into pyproject.toml, every [tool.commitizen…] table is replaced and the rest of the file is left byte for byte. The result is parsed back and compared to what was meant; if it does not match, the write falls back to a standalone .cz.toml and the original is untouched.
• Any existing file is copied to <name>.bak.<timestamp> first, and a config that wasn't written by this wizard asks before being replaced.
• If more than one commitizen config now exists, you're told which one commitizen will actually read — .cz.toml beats pyproject.toml, so a new dotfile can silently shadow settings you forgot about.
• In a git repo with no commit-msg hook, you're offered one running cz check. An existing hook is never replaced.

The output is meant to be hand-edited afterwards: commented, ordered, and with regexes written as TOML literal strings so ^((BREAKING[\-\ ]CHANGE|feat)(\(.+\))?!?): reads as itself instead of with every backslash doubled.

# Commitizen configuration
# Generated by `devstuff configure commitizen` — edit freely, or re-run the wizard.
# Convention: Custom types and bump rules · Types: feat, fix, docs, deps
# Option reference: https://commitizen-tools.github.io/commitizen/config/
[tool.commitizen]
name = 'cz_customize'
version_provider = 'pep621'
version_scheme = 'pep440'
tag_format = 'v$version'
update_changelog_on_bump = true
# …

# Prefix -> version increment. Order matters: commitizen stops at the first
# key that matches, so the two breaking-change rules have to lead.
[tool.commitizen.customize.bump_map]
'^.+!$' = 'MAJOR'
'^BREAKING[\-\ ]CHANGE' = 'MAJOR'
'^feat' = 'MINOR'
'^fix' = 'PATCH'
'^deps' = 'PATCH'

Design notes, including why this one isn't catalog-driven and why the checks warn rather than veto: docs/specs/commitizen-config/.

pre-commit wizard

pre-commit does nothing until two separate things are true: a .pre-commit-config.yaml exists, and pre-commit install has written the git hooks. Neither implies the other, and a repo with the first but not the second looks configured, validates cleanly, and never runs a single check. Writing the file means knowing, per hook, which repo publishes it, its exact id, what tag to pin, and which arguments are actually decisions — none of which is discoverable from --help, so the usual workflow is copying someone else's config and hoping.

The wizard starts from a preset that already matches the project:

Preset	What you get
Minimal	Four hooks right for any repo, all of which fix rather than nag
Essentials	File hygiene, YAML/JSON/TOML parse checks, a private-key guard. No language tools
Python (ruff)	Essentials + ruff-check and ruff-format — the modern default
Python, strict	…plus mypy, yamllint and gitleaks
Python (black + isort + flake8)	The pre-ruff toolchain, for a project already on it
JavaScript / TypeScript	Essentials + prettier and eslint
Shell scripts	Essentials + shellcheck, shfmt and shebang checks
Security first	Essentials + gitleaks, AWS-key detection, no-commits-to-main
Documentation	Essentials + markdownlint and yamllint
Match this project	Essentials + the hooks for the languages actually found here
Start from nothing	Pick all ~38 hooks yourself

Then a grouped checkbox over the full catalog (file hygiene · config files · Python · JavaScript · shell · Docker · docs · secrets · commit messages), each hook labelled with what it does and whether it rewrites files or only reports.

Before it asks anything the wizard reads the project: git root, the languages present (via git ls-files, so a vendored node_modules can't make a Python repo look like a JS one, and a language needs two files to count), an existing config and the hook ids in it, which git hook types are currently installed, and whether a commitizen config exists.

Several things are derived rather than asked:

• default_install_hook_types comes from the stages of the hooks you picked. pre-commit install installs only the pre-commit hook unless told otherwise — so adding commitizen's commit-msg hook without this gives you a config that validates, an install that reports success, and a hook that never fires. Nothing in pre-commit's output mentions it.
• The pre-commit.ci skip list is exactly the Docker-backed hooks. pre-commit.ci runs no Docker daemon, so those fail there with a container error rather than a lint result.
• The suggested exclude is built from the lockfiles actually in the repo, never a fixed list.
• The commitizen hook is only suggested when a commitizen config exists — it runs cz check and fails every commit without one.

The review screen lists every hook with its source repo, stage and effect, the prerequisites anything needs (Docker, Node, a commitizen config), and warns about conflicting pairs — two formatters over the same files don't error, they reformat each other's output on alternate commits, forever.

Checked against the real binary, at three levels split by what they cost:

Action	What it proves	Cost
automatic, before every save	pre-commit validate-config passes, the emitted YAML parses back to what the model meant, and no selected stage is missing from default_install_hook_types	offline, milliseconds
Clone the repos and prove every hook id exists	Runs pre-commit install-hooks. The only check that verifies hook ids — validate-config reads the file's shape and never opens a repo, so a typo passes it and fails on your next commit	network, minutes
Refresh every repository to its latest tag	Runs the real pre-commit autoupdate and shows the diff	network, seconds

A disagreement at save time is reported and asks for confirmation — it never blocks the save. Without pre-commit installed the wizard still works; the checks say so rather than failing.

On save the config is written (any existing file copied to <name>.bak.<timestamp> first, and a config not written by this wizard asks before being replaced, listing the ids it currently runs), and then pre-commit install runs with the derived --hook-type flags. Opt out and you get the exact command to run later.

# pre-commit configuration
# Generated by `devstuff configure pre-commit` — edit freely, or re-run the wizard.
# Preset: Match this project · 14 hooks
#
# Install the git hooks:   pre-commit install --install-hook-types pre-commit,commit-msg
# Run against everything:  pre-commit run --all-files

# `pre-commit install` only installs the pre-commit hook unless it is told
# otherwise, so the hooks below that run at another stage need this to run at all.
default_install_hook_types: [pre-commit, commit-msg]

# Paths no hook ever looks at.
exclude: '^(.*/)?(uv\.lock)$'

repos:
  - repo: https://github.com/pre-commit/pre-commit-hooks
    rev: v6.0.0
    hooks:
      # File hygiene
      - id: trailing-whitespace
      - id: check-added-large-files
        args: ['--maxkb=500']
      # Config files
      - id: check-yaml
      # Secrets and safety
      - id: detect-private-key
  - repo: https://github.com/astral-sh/ruff-pre-commit
    rev: v0.16.1
    hooks:
      - id: ruff-check
        args: ['--fix', '--exit-non-zero-on-fix']
      - id: ruff-format

Every repo, rev and hook id in the catalog was read from the real repository rather than recalled — the revs are what pre-commit autoupdate resolves to, and the ids came from each repo's own .pre-commit-hooks.yaml at that rev. Design notes, including why the verification is split by cost and why quoting is decided by asking the YAML parser instead of a lookup table: docs/specs/precommit-config/.

Starship prompt wizard

Four questions, with the prompt re-rendered after each one:

Step	Options
Style	Plain text · Bracketed segments (both ASCII, any font) · Icons · Icons, bracketed (Nerd Font glyphs) · Powerline, Powerline, rounded, Powerline, slanted (solid colour bars)
Palette	Terminal colours (inherits your terminal theme) · Catppuccin Mocha · Nord · Gruvbox Dark · Tokyo Night · Dracula · Rosé Pine · Catppuccin Latte (light)
Sections	Grouped checkbox over ~35 modules — see the table below
Layout	Single line · Two lines · Two lines with shell info right-aligned (needs zsh/fish/nushell — bash has no right prompt)

Group	Sections
Context	username, hostname (over SSH), container (Docker/toolbox/distrobox)
Location	current directory
Git	branch, commit hash (when detached), status (dirty/ahead/behind), operation in progress
Languages	Node.js, Deno, Bun, Python, Rust, Go, Java, PHP, Ruby, Elixir, .NET, package version
Infrastructure	Docker context, Docker Compose project, Kubernetes context, AWS profile, Google Cloud project, Azure subscription, Terraform workspace, Nix shell
Shell	command duration, exit code of the last command, background jobs, nested shell depth, clock

The review menu adds two content toggles: the blank line between prompts, and whether language sections show version numbers or just the runtime's symbol.

If you pick a style that needs a Nerd Font and there isn't one on the machine, the wizard says so in the style list itself (Needs a Nerd Font — none installed here.) and offers to install nerd-font right there — once per run, whether you say yes or no. Two cases it handles rather than pretending otherwise: over SSH it points you at nerdfonts.com instead, because the glyphs are drawn by the terminal on your machine, not the one you're configuring; and after installing it reminds you to actually select the font in your terminal's settings, which is a preference no shell can change for you. Without fontconfig there is no way to enumerate fonts, so the wizard says nothing rather than guessing.

The Compose section is a starship custom module rather than a built-in one — it reports the project name docker compose in that directory would actually use ($COMPOSE_PROJECT_NAME, else a top-level name: in the compose file, else the lowercased directory name), and it only runs at all when there is a compose file next to you.

The preview is the real thing: the candidate config is written to a temp file and rendered by your installed starship binary inside a throwaway sample project (a git repo with language marker files), so what you see is the bytes your prompt will produce. Without starship installed the wizard still works and falls back to a labelled approximation.

A review menu then lets you revisit any answer, dump the generated TOML, or save. On save:

• Written to $STARSHIP_CONFIG, or ~/.config/starship.toml.
• Any existing file is copied to starship.toml.bak.<timestamp> first — and if it wasn't written by this wizard, you're asked before it's replaced.
• If ~/.bashrc has no starship hook, you're offered one (using the same marker devstuff install starship uses, so devstuff remove starship still cleans up).

The output is meant to be hand-edited afterwards: it's commented, ordered, and colours are referenced through nine semantic palette roles (dir, git, lang, infra, shell, ok, err, muted, bar_text), so retheming everything is nine edits in one table.

# Starship prompt configuration
# Generated by `devstuff configure starship` — edit freely, or re-run the wizard.
# Style: Powerline · Palette: Nord · Layout: Two lines
# Module reference: https://starship.rs/config/
"$schema" = 'https://starship.rs/config-schema.json'

add_newline = true
palette = 'nord'

format = """
[](fg:dir)\
$directory\
[](fg:dir bg:git)\
$git_branch\
[](fg:git)\
$line_break\
$character"""

# Semantic colour roles — swap these to retheme every section at once.
[palettes.nord]
dir = '#81a1c1'
git = '#a3be8c'
# …

Docker daemon wizard

Docker's default log driver writes uncapped JSON files under /var/lib/docker. A chatty container grows them until the partition is full, at which point the daemon and usually the host stop working. Nothing warns about it, and it is the most common way a Docker host dies.

daemon.json has its own trap: dockerd --validate accepts five configurations that let the daemon start healthy and then make every docker run fail with an error that never mentions the config file. All measured against Docker 29.6:

config	dockerd --validate	what actually happens
a key typo, a malformed CIDR, a numeric max-size	rejected	—
"log-driver": "nosuchdriver"	accepted	every container fails to start
an unknown log option for the chosen driver	accepted	every container fails to start
max-file: "1" with compress: "true"	accepted	every container fails to start
an address pool size below its base prefix	accepted	no usable networks
"hosts" alongside a systemd unit passing -H	accepted	daemon refuses to start

The wizard runs --validate and every check in that table it does not do.

Preset	What it sets
Log rotation only	A size cap and nothing else — the safe minimum
Workstation	Rotation, live-restore, faster parallel pulls
Server	Bigger log budget, compression, metrics on loopback, no-new-privileges
CI runner	Small logs, fast pulls, no live restore
Hand logs to systemd	journald owns container output and its own rotation
Behind a corporate network	Rotation plus address pools that avoid the usual VPN collisions
Whatever is on this machine now · Start from nothing

Three things are derived rather than asked: the log-opts are filtered to what the chosen driver accepts (journald rejects max-size, and would otherwise break every container), only non-default values are written (so a future Docker changing a default still reaches you), and any key in an existing daemon.json the wizard doesn't model is carried through untouched.

Saving writes through sudo install — shown before it runs, staged via a temp file so a failed sudo can't truncate the existing config. The restart is a separate question, because it stops running containers unless live-restore was already on before it, and it reports how many containers that is.

{
  "log-driver": "local",
  "log-opts": { "max-size": "10m", "max-file": "3", "compress": "true" }
}

bat wizard

bat ships 28 themes and no way to see one without typing its name, so the wizard renders a sample file through the real bat on every pass — choosing a theme is looking at it.

It also catches bat's one quiet failure: a theme name bat doesn't have produces a warning on stderr (which a pager swallows) and exit 0, so a typo silently gives you the default theme forever. Every theme named is checked against bat --list-themes, which is read at run time so themes you built yourself are offered too.

Preset	What it sets
Balanced	bat's defaults, with a light/dark theme pair that follows your terminal
Minimal	No decorations, no pager — closest to plain cat
Line numbers only	Numbers and nothing else, so output stays copy-pasteable
Code review	Numbers, git changes, grid, both headers, italics
Friendly to pipes	No pager, no wrapping, no decorations
Whatever is configured now · Start from nothing

The shell integration is offered too, since the best thing bat does isn't in its config file at all: syntax-highlighted man pages (MANPAGER + MANROFFOPT), a bathelp function, and the cat alias — which carries the caveat that scripts still get the real cat, because aliases are interactive-only.

# Generated by devstuff — devstuff configure bat
--theme-dark="Monokai Extended Origin"
--theme-light="GitHub"
--style="numbers,grid,header-filename,header-filesize,changes,snip"
--italic-text="always"

Ansible wizard

ansible.cfg is the config file most likely to be copied from a tutorial that's years out of date, because ansible-core keeps moving settings and never tells you when one stops working. Measured against ansible-core 2.20:

what you write	ansible-config validate	does it work?
[ssh_connection] + pipelining	unknown section	no — absent from dump entirely
stdout_callback = yaml	fine	no — that callback was removed
pipelining = "True" (quoted)	fine	inverted — read as False
inventory = "./inv" (quoted)	fine	no — a path containing quotes
callback_result_format = yaml	unknown key	yes — the validator is wrong
any of the above, in a world-writable directory	fine	no — the file is ignored wholesale

So validation isn't authoritative in either direction. The wizard's real check is ansible-config dump --only-changed, which lists what ansible actually read from the file — every setting written has to appear there.

Preset	What it sets
Project defaults	Readable output, sensible paths, and the speed settings that matter
Fast	Many forks, pipelining, cached facts — for large inventories
CI runner	No host-key prompts, terse output, no cows
With vault	Project defaults plus a vault password file
Escalating by default	Project defaults plus become
Whatever is configured now · Start from nothing

Values are written unquoted, deliberately: a quoted path becomes a path containing quote characters, and a quoted boolean is read as False. A retired section in an existing file is preserved and reported, never silently migrated — the wizard can't know whether an older ansible elsewhere is still reading it.

lazygit wizard

lazygit refuses to start on a value of the wrong type, and silently ignores an unknown key or an invalid enum value. So a config assembled from blog posts starts perfectly and does a fraction of what it says — git.paging.useConfig appears in most delta guides and no longer exists; nerdFontsVersion: "9" is accepted and draws no icons.

Every key the wizard writes was verified real by turning that asymmetry into a probe: set the key to a value of obviously the wrong type and start lazygit — a real key errors, an unknown one is ignored. (lazygit --config looks like a key list and isn't: it omits every setting with no default, including git.paging.pager, the delta integration everyone wants.)

Preset	What it sets
Recommended	Icons, a readable graph, startup popups off
No icons	The same, minus the Nerd Font glyphs
With delta	Recommended plus delta as the diff pager
Minimal interface	No command log, bottom line or tips
Careful	Confirm on quit, no force pushing, no background fetching
Whatever is configured now · Start from nothing

Icons are gated on the Nerd Font check the starship wizard already uses — including its "can't tell" answer, which means stay silent rather than nag. Your customCommands and keybinding trees are preserved untouched; the wizard models neither.

---

add

Guided wizard to register a new custom package. Supports six install types:

Type	What it does
npm	npm install -g <package>
uvx	uv tool install <package>
apt	sudo apt-get install -y <packages>
git	git clone --depth=1 <url> with optional post-clone and pre-remove commands
script	curl -fsSL <url> | sh — single-URL convenience script
bash	Arbitrary multi-step bash — opens $EDITOR for install and remove scripts

devstuff add

The wizard collects type-specific fields, then prompts for a help command (e.g. tool --help). Packages are saved into ~/.config/devstuff/tools.yaml.

bash type

For tools like AWS CLI or saml2aws that require multiple download/extract/install steps, choose the bash type. The wizard opens $EDITOR twice — once for the install script and once for the optional remove script — with a #!/usr/bin/env bash / set -euo pipefail template pre-filled.

Example YAML for a bash-type custom package:

version: 1
tools:
  batcat:
    name: batcat
    description: Modern cat with syntax highlighting
    category: custom
    type: bash
    check_cmd: bat
    help_cmd: bat --help
    install_script: |
      set -euo pipefail
      VER=$(curl -s https://api.github.com/repos/sharkdp/bat/releases/latest | grep tag_name | cut -d'"' -f4 | sed 's/v//')
      curl -fsSL "https://github.com/sharkdp/bat/releases/download/v${VER}/bat_${VER}_amd64.deb" -o /tmp/bat.deb
      sudo dpkg -i /tmp/bat.deb
      rm /tmp/bat.deb
    remove_script: |
      sudo dpkg -r bat

---

delete

Remove a user catalog entry from the registry. Built-in-only packages cannot be deleted, but a user override of a built-in package can be deleted to restore the bundled definition.

devstuff delete my-tool
devstuff rm my-tool              # alias

Asks for confirmation, then removes the entry from ~/.config/devstuff/tools.yaml.

---

catalog

Manage the user YAML catalog.

devstuff catalog path                 # print ~/.config/devstuff/tools.yaml
devstuff catalog export               # write ./devstuff-tools.yaml
devstuff catalog export tools.yaml    # write effective catalog to a path
devstuff catalog import tools.yaml    # validate and merge into user catalog

The effective catalog is loaded in this order:

1. Bundled tools from src/dev_setup/tools.yaml
2. Legacy JSON migration from ~/.config/devstuff/packages/*.json
3. User overrides and additions from ~/.config/devstuff/tools.yaml

When a user key matches a bundled key, the user definition overrides the bundled definition in place. New user keys are appended after bundled tools.

---

skills

Interactively clone a GitHub repository and copy its skills into claude, codex, and/or pi.

devstuff skills add

You'll be prompted for:

• Repository — owner/repo or a full URL.
• Targets — which of claude (~/.claude/skills), codex (~/.codex/skills), and pi (~/.pi/skills) to install into.

The repo is cloned anonymously first. If that fails (private repo), you're prompted to authenticate via an SSH key file or a GitHub personal access token. If the repo has a top-level skills/ directory, every subdirectory under it is treated as its own skill; otherwise the whole repo is treated as a single skill. Existing skill directories are only overwritten after confirmation.

---

Agent

devstuff agent opens an interactive session with a local model (via Ollama) that can call devstuff's own tools plus a workspace-scoped filesystem/shell kit. Nothing leaves the machine, there are no API keys, and it works offline.

devstuff agent                                  # interactive REPL
devstuff agent --setup                          # (re)run the configuration wizard
devstuff agent --dir ~/projects                 # skip the workspace prompt
devstuff agent --model granite4.1:8b            # override the configured model
devstuff agent --print "which node tools do I have?"   # one-shot, non-interactive

you ❯ create a python project called xyz-project with a hello world main.py

  ↳ run_command(command='mkdir xyz-project')

  ╭─ run in ./xyz-project ──────────────────────╮
  │ mkdir xyz-project                           │
  ╰─────────────────────────────────────────────╯
  ? Run run_command?  Yes / No / Always allow this tool

Setup

First, make sure a tool-capable model is available:

devstuff install ollama
ollama pull gemma4          # or any model reporting the `tools` capability

Then the first time you run devstuff agent with no configuration, a wizard walks you through it — Ollama host, then a pick-list of your locally available tool-capable models, then whether to show the model's reasoning. It writes ~/.config/devstuff/agent.yaml and continues into the session. Re-run it any time with devstuff agent --setup.

The wizard only lists models that report the tools capability (ollama show <model> shows it under Capabilities), so you can't accidentally pick one that can't call tools. devstuff agent re-verifies this at startup regardless, and tells you which local models qualify if the configured one doesn't.

The wizard is skipped when you pass --model/--host (you're already steering) or run non-interactively (--print), which fall back to built-in defaults.

Safety model

The workspace root, chosen at launch (prompted, defaulting to the current directory), is the boundary:

• Path containment — every path a tool touches is resolved (collapsing .. and following symlinks) and must land inside the workspace root. A symlink planted inside the workspace is not a way out.
• Protected paths — ~/.ssh, ~/.aws, ~/.gnupg and ~/.config/gh are refused for read and write even if the workspace root contains them. ~/.config/devstuff is readable but never writable: catalog authoring stays a human action.
• Confirmation — every mutating tool call shows the exact command, or a unified diff for write_file, and waits for yes / no / always-this-session. Read-only calls run silently.
• Denylist — sudo, pipe-to-shell installers, catastrophic deletes, disk and service commands, and redirects out of the workspace are refused before any prompt is shown, and are not enabled by --yolo.
• Launch guard — warns before handing the agent $HOME, a system directory, or a git repo with uncommitted changes.

--yolo skips confirmations for a session; the denylist and path containment still apply. In --print mode without --yolo, mutating calls are refused rather than auto-approved, so a scripted invocation cannot become an unattended agent with write access.

Configuration

~/.config/devstuff/agent.yaml (all fields optional):

version: 1
model: gemma4:latest
host: http://localhost:11434     # a remote daemon works; the local binary is then not required
temperature: 0.2
num_ctx: 16384
think: false                     # true renders the model's reasoning, dimmed
max_iterations: 12               # tool calls per turn before the loop gives up
request_timeout: 120
command_timeout: 120
max_tool_output_bytes: 8000      # tool output is truncated to this before going back to the model
auto_approve: []                 # tool keys that never ask, e.g. ["write_file"]
deny_patterns: []                # extra regexes refused on top of the built-in denylist

Tools

Tool	Mutating	Purpose
read_file		Read a UTF-8 file in the workspace
write_file	!	Create or overwrite a file (shows a diff)
list_dir		List a directory
cd		Move the working directory used by later calls
run_command	!	Run a shell command in the workspace
list_tools		List the devstuff catalog with install state
search_catalog		Find a catalog tool by name or description
tool_info		Details for one catalog tool
install_tool	!	Install a catalog tool (handles sudo itself)
fn_<key>	!	Every type: script entry in functions.yaml, exposed automatically

cd is a tool rather than a shell command because each run_command is its own subprocess — a shell cd would evaporate when it exits. shell-eval functions are deliberately excluded: they exist to mutate the calling shell, which a subprocess cannot do.

agent_tools.yaml

The toolbox is a catalog, like everything else. Bundled at src/dev_setup/agent_tools.yaml, user overrides at ~/.config/devstuff/agent_tools.yaml, same merge precedence as tools.yaml.

version: 1
expose_functions: true
tools:
  count_lines:
    name: Count Lines
    description: Count the lines in a file. Use this instead of reading a large file.
    impl: primitive          # primitive | catalog | function
    mutating: false
    params:
      - name: path
        type: string
        description: Path to the file, relative to the current directory.
        required: true

impl: primitive dispatches to a callable in agent/primitives.py keyed by the tool key (adding a new one is a code change). impl: catalog and impl: function bridge to the tool registry and functions.yaml respectively via target, and need no code. src/dev_setup/agent_tools.schema.json documents every field for editor autocomplete; it is not enforced at runtime.

Session state

• Prompt history: ~/.local/share/devstuff/agent/history
• Transcripts: ~/.local/share/devstuff/agent/transcripts/<timestamp>.json, written after every turn so a session that ends in a crash is still readable. /history shows the current session and the transcript path.

Using the prompt

• Enter sends. Alt+Enter (or Ctrl-J) inserts a newline, for pasting or writing multi-line instructions.
• Type / for a completion menu of session commands and every available tool, mutating ones flagged with !. Tab cycles, Enter takes the highlighted entry.
• /<tool> describes a tool and its parameters, e.g. /write_file. It does not run it — the agent decides when tools run, so there is no back door around the confirmation flow.

In-session commands: /tools, /history, /cwd, /model, /reset, /help, /exit.

---

Functions/Scripts

Reusable shell functions/snippets, tracked in a separate catalog from installable tools (~/.config/devstuff/functions.yaml, same bundled+user precedence merge as tools.yaml). Unlike tools, functions aren't installed/removed — they're invoked.

There are two function types, because a devstuff command runs as its own child process and can't mutate the shell that invoked it:

Type	What it does	How you invoke it
script	Runs as a subprocess (like a tool's install_script) — for anything that just calls other binaries/apps and doesn't need to change your shell's state.	devstuff run <key> [args...] — prompts for any missing required param.
shell-eval	For things that must mutate the calling shell — env vars, cd, aliases, agents. Has two register modes (see below).	Depends on register.

shell-eval functions declare register:

• register: bashrc (default) — devstuff functions enable <key> patches a real shell function into ~/.bashrc (idempotent, using the same patch/remove mechanism as tool bashrc blocks). After enabling, open a new shell (or source ~/.bashrc) and call the function directly by name — devstuff itself never runs it, since a child process can't export environment changes back to your interactive shell.

  devstuff functions enable ssh-agent-key
  source ~/.bashrc
  ssh-agent-key ~/.ssh/id_ed25519
  

  devstuff functions disable <key> removes it from ~/.bashrc.
• register: eval — devstuff run <key> [args] resolves params and prints shell code to stdout only (no prompts, no formatting — anything else on stdout would corrupt the eval capture); missing required params are reported on stderr and exit non-zero instead.

  eval "$(devstuff run some-eval-function arg1)"
  

Other commands:

devstuff functions list      # show all functions, their type, and declared params
devstuff functions path      # print ~/.config/devstuff/functions.yaml

functions.yaml schema

A JSON Schema documenting every field (src/dev_setup/functions.schema.json) mirrors the validation in functions_catalog.py — point your editor's YAML language server at it for inline docs/autocomplete/validation while hand-editing a functions catalog (in VS Code with the YAML extension, add a yaml.schemas mapping to the file's path, or add a # yaml-language-server: $schema=<path> comment at the top of the file, as the bundled catalog does).

version: 1
functions:
  ssh-agent-key:
    name: SSH Agent + Add Key
    description: Start ssh-agent in the current shell and add a key to it
    type: shell-eval
    register: bashrc
    params:
      - name: key_path
        description: Path to the SSH private key
        required: true
    script: |
      eval "$(ssh-agent -s)"
      ssh-add "$key_path"
    docs_url: https://www.ssh.com/academy/ssh/agent

Each params entry becomes a named shell variable in the script body ($key_path, not positional $1) — the runner injects a prelude mapping real argv positions to those names for script/bashrc-registered functions, or bakes the already-resolved, shell-quoted values directly for register: eval (which has no argv channel of its own once eval'd).

Function fields

Field	Required	Description
name	no	Display name shown in functions list. Defaults to the catalog key.
description	no	Short description shown in functions list. Defaults to "".
category	no	Group shown in functions list (grouped/sorted like tools). Freeform string, defaults to custom.
type	yes	script or shell-eval — see the type table above.
register	shell-eval only	bashrc (default) or eval. Rejected for type: script.
params	no	List of param objects (see below), resolved positionally in the order declared.
script	yes	The bash script body. References params by name ("$key_path"), not by position ($1).
help_cmd	no	Help command shown alongside the function in functions list.
docs_url	no	Documentation URL for this function.

Param fields

Field	Required	Description
name	yes	Shell variable name the param is bound to. Must be a valid shell identifier (letters/digits/underscore, not starting with a digit) and unique within the function.
description	no	Defaults to "". Shown as the prompt label when this param is missing and interactively promptable (type: script only — shell-eval never prompts).
required	no	Defaults to true. Whether the param must resolve to a non-empty value. An explicitly empty value (devstuff run key "") counts as missing, same as not passing it at all.
default	no	Defaults to "". Fallback value used when nothing else resolves it. A required param with a default is always satisfied by it, so it never triggers a resolution error or (for register: bashrc) the runtime bash guard described below.

Unknown fields fail validation, same as tools. A required param without a default behaves differently per invocation path:

• type: script — prompts for it interactively (unless stdin isn't a terminal, in which case it's reported and the command exits non-zero rather than hitting an unreadable prompt).
• register: eval — reported on stderr and exits non-zero; never prompts, to keep stdout clean for eval capture.
• register: bashrc — devstuff is never involved when the enabled function is called directly, so enforcement happens inside the generated function itself: it fails loudly (message to stderr, return 1) if the argument is left blank at call time.

Not yet built: an add wizard and catalog import/export for functions, analogous to the ones tools already have — for now, custom functions are hand-edited YAML at ~/.config/devstuff/functions.yaml.

Built-in functions

Key	Category	Type	Description	Args
ssh-agent-key	auth	shell-eval (bashrc)	Start ssh-agent in the current shell and add a key to it	key_path
validate-docker-compose	validation	script	Validate a docker-compose.yml file in the current directory	—
validate-yaml	validation	script	Validate a YAML file's syntax using yq	file
whats-on-port	network	script	Find which process is listening on a port	port, protocol (optional: tcp/udp/all)
acc-check	web-dev	script	Run the pi coding agent's /dogfood skill against a web URL	url, instruction (optional)
aws-saml-reauth	web-dev	script	Reauthorize the AWS CLI via saml2aws login --force	profile (optional)

whats-on-port

devstuff run whats-on-port 8080          # tcp and udp
devstuff run whats-on-port 5432 tcp      # one protocol

Prints the matching sockets, then the PID, user, elapsed time and untruncated command line of every process holding them — plural because SO_REUSEPORT lets several processes share one port, and "which of these five node processes" is usually the actual question.

It uses ss rather than lsof or fuser for one measured reason: run unprivileged against another user's socket, lsof and fuser print nothing and exit as though the port were free. ss still lists the socket, just without the users:((...)) field — so the function can tell "nothing there" apart from "something there I'm not allowed to name", and says which. When the process is hidden it retries under sudo -n, and only if that needs no password; a diagnostic shouldn't stop to prompt for one. If sudo isn't available it says what to re-run.

"Nothing is listening" is reported as a success, not a failure, along with the two reasons a bind can still fail afterwards: a container port published with userland-proxy: false is NAT-forwarded with no host socket to find at all, and sockets in another network namespace are invisible. If Docker is running, published container ports are matched and named too — docker-proxy's own command line doesn't say which container it belongs to.

ss comes from iproute2, which isn't a devstuff package and isn't on every minimal image, so a missing ss names the apt package instead of surfacing "command not found".

---

Built-in packages

Core

These are the foundation tools — install them on every machine.

Key	Name	Description	Help
docker	Docker	Container runtime + docker compose plugin (devstuff configure docker)	docker --help
nvm	NVM + Node LTS	Node Version Manager + latest Node LTS	nvm help
uv	uv	Astral Python package and project manager	uv --help

Tools

Optional utilities you may want on some machines.

Key	Name	Description	Help
ansible	Ansible	Automation engine for configuration management and app deployment (devstuff configure ansible)	ansible --help
aws	AWS CLI	Amazon Web Services CLI v2	aws help
bat	bat	cat replacement with syntax highlighting and git integration (devstuff configure bat)	bat --help
commitizen	Commitizen	Conventional-commit prompt, semantic version bumping, and changelog generation (devstuff configure commitizen)	cz --help
eza	eza	Modern ls replacement with git status, icons, and tree view	eza --help
gh	GitHub CLI	GitHub's official CLI	gh --help
htop	htop	Interactive process and resource monitor	man htop
lazygit	lazygit	TUI git client for fast, keyboard-driven git workflows (devstuff configure lazygit)	lazygit --help
mkcert	mkcert	Zero-config local HTTPS certificates	mkcert --help
nerd-font	JetBrainsMono Nerd Font	Patched font supplying the icons Starship and other CLI tools draw	fc-list | grep -i "nerd font"
ollama	Ollama	Run large language models locally	ollama --help
php	PHP 8.4	PHP 8.4 + common extensions via ondrej/php PPA	php --help
pi	Pi Coding Agent	AI coding agent npm package	pi --help
pre-commit	pre-commit	Git hook manager for automated code quality checks (devstuff configure pre-commit)	pre-commit --help
saml2aws	saml2aws	SAML → AWS STS credentials CLI (Versent)	saml2aws --help
starship	Starship	Fast, cross-shell customizable prompt (devstuff configure starship)	starship --help
yq	yq	Portable command-line YAML/JSON/XML processor	yq --help

Languages

Key	Name	Description	Help
go	Go	Go programming language toolchain	go help
java	Java 21 (OpenJDK)	OpenJDK 21 LTS - JDK and JRE	java --help
ruby	Ruby (rbenv)	Ruby via rbenv version manager + ruby-build	ruby --version

---

Custom packages

Custom packages live in ~/.config/devstuff/tools.yaml. You can create them via devstuff add, import them with devstuff catalog import, or edit the YAML by hand.

YAML schema

version: 1
tools:
  my-tool:
    name: My Tool
    description: Does something useful
    category: custom
    type: bash
    check_cmd: my-tool
    help_cmd: my-tool --help
    docs_url: https://example.com/docs
    requires: []
    install_script: |
      set -euo pipefail
      curl -fsSL https://example.com/install.sh | sh
    remove_script: |
      rm -f "$HOME/.local/bin/my-tool"

YAML fields

Field	Required	Description
name	yes	Display name shown in list
description	no	Short description shown in list
category	no	custom (default), core, tools, or languages
type	yes	npm, pip, uvx, apt, git, script, or bash
check_cmd	no	Binary name or shell check used to detect install status
help_cmd	no	Command shown in list under the package entry
docs_url	no	URL opened by devstuff docs <key>
requires	no	List of package keys that must already be installed
npm_name	npm	npm package name
pip_name	pip	PyPI package name
apt_packages	apt	Space-separated list of apt packages
git_url	git	Repository URL to clone
git_install_cmd	git	Bash command run inside the cloned repo after clone
git_remove_cmd	git	Bash command run inside the repo before deletion
script_url	script	URL passed to curl -fsSL … | sh
install_script	bash	Full bash script to run on install
remove_script	bash	Full bash script to run on remove

Unknown fields fail validation. requires defaults to ["nvm"] for npm tools and ["uv"] for pip/uvx tools unless explicitly set.

Examples

npm package:

version: 1
tools:
  prettier:
    name: Prettier
    description: Opinionated code formatter
    type: npm
    npm_name: prettier
    check_cmd: prettier
    help_cmd: prettier --help

uvx/PyPI package:

version: 1
tools:
  httpie:
    name: httpie
    description: Human-friendly HTTP client
    type: uvx
    pip_name: httpie
    check_cmd: http
    help_cmd: http --help

apt package:

version: 1
tools:
  ripgrep:
    name: ripgrep
    description: Fast recursive search tool
    type: apt
    apt_packages: ripgrep
    check_cmd: rg
    help_cmd: rg --help

Multi-step bash install:

version: 1
tools:
  saml2aws-custom:
    name: saml2aws (custom)
    description: SAML-to-AWS credential helper
    type: bash
    check_cmd: saml2aws
    help_cmd: saml2aws --help
    install_script: |
      set -euo pipefail
      VER=$(curl -s https://api.github.com/repos/Versent/saml2aws/releases/latest | grep tag_name | cut -d'v' -f2 | cut -d'"' -f1)
      curl -fsSL "https://github.com/Versent/saml2aws/releases/download/v${VER}/saml2aws_${VER}_linux_amd64.tar.gz" | tar -xz -C /tmp
      sudo mv /tmp/saml2aws /usr/local/bin/saml2aws
      sudo chmod +x /usr/local/bin/saml2aws
    remove_script: |
      sudo rm -f /usr/local/bin/saml2aws

---

Architecture

dev-setup-py/
├── devstuff              # Bash entry point — bootstraps uv, then exec's Python
├── install.sh             # Installs devstuff and exposes the devstuff command
├── pyproject.toml         # Python project (hatchling, requires-python >=3.11)
└── src/
    └── dev_setup/
        ├── __main__.py    # python -m dev_setup entry point
        ├── cli.py         # Click group, command registration
        ├── base.py        # Tool ABC, patch_bashrc / remove_bashrc_block utilities
        ├── catalog.py     # YAML catalog loading, validation, migration, import/export
        ├── registry.py    # Loads bundled + user YAML into the live tool registry
        ├── generic.py     # GenericTool - handles all catalog install types
        ├── tools.yaml     # Bundled built-in tool catalog
        ├── functions_catalog.py   # YAML catalog loading/validation for functions.yaml
        ├── functions_registry.py # Loads bundled + user YAML into the live function registry
        ├── function_runner.py    # Param resolution + script/eval/bashrc rendering & execution
        ├── functions.yaml        # Bundled built-in function catalog
        ├── configure/              # Per-tool setup wizards (see "configure" above)
        │   ├── __init__.py         # CONFIGURATORS registry: tool key -> wizard module
        │   └── starship/
        │       ├── model.py        # presets, palettes, sections, StarshipConfig
        │       ├── render.py       # starship.toml emitter + offline preview renderer
        │       ├── preview.py      # live preview via `starship prompt` in a sample project
        │       └── wizard.py       # the interactive flow, backup + save
        ├── agent_tools.yaml       # Bundled agent tool catalog
        ├── agent/                 # Local-model agent (see "Agent" above)
        │   ├── config.py          # agent.yaml load/validate/save
        │   ├── wizard.py          # first-run setup wizard (devstuff agent --setup)
        │   ├── ollama.py          # stdlib-urllib client for /api/chat, /api/tags, /api/show
        │   ├── preflight.py       # installed / reachable / pulled / tool-capable checks
        │   ├── sandbox.py         # Workspace containment + command denylist + launch guard
        │   ├── catalog.py         # agent_tools.yaml load/validate/merge
        │   ├── registry.py        # AgentTool -> Ollama tool schema; function auto-exposure
        │   ├── primitives.py      # _PRIMITIVES dispatch: read_file/write_file/list_dir/cd/run_command
        │   ├── bridges.py         # catalog + functions.yaml bridges
        │   ├── approval.py        # confirmation prompts, unified diffs
        │   ├── loop.py            # tool-calling loop
        │   ├── transcript.py      # per-session JSON transcript
        │   └── session.py         # REPL, slash commands
        ├── ui.py          # Rich console helpers, questionary wrappers, styled prompts
        ├── commands/
        │   ├── list_cmd.py
        │   ├── install_cmd.py
        │   ├── remove_cmd.py
        │   ├── update_cmd.py
        │   ├── add_cmd.py
        │   ├── delete_cmd.py
        │   ├── catalog_cmd.py
        │   ├── run_cmd.py
        │   ├── functions_cmd.py
        │   ├── skills_cmd.py
        │   └── agent_cmd.py
└── docs/
    └── specs/             # Design docs per feature (see docs/specs/README.md)
        └── agent/

Adding a new built-in tool

Add an entry to src/dev_setup/tools.yaml. Built-ins use the same schema as user tools, with category set to core, tools, or languages.

mytool:
  name: My Tool
  description: Does something useful
  category: tools
  type: bash
  check_cmd: mytool
  help_cmd: mytool --help
  docs_url: https://example.com/docs
  install_script: |
    set -euo pipefail
    curl -fsSL https://example.com/install.sh | sh
  remove_script: |
    sudo rm -f /usr/local/bin/mytool

Key design decisions

• uv owns Python provisioning. The bash wrapper only guarantees uv is present; Python version and virtualenv management is delegated entirely to uv run.
• Catalogs are the source of truth. Bundled YAML loads first, then user YAML overrides matching keys and appends new tools.
• Tool execution is generic. The Python engine handles npm, uvx/pip, apt, git, script URLs, and bash scripts from catalog metadata.
• Custom packages are plain YAML. Scripts are stored as strings and written to a temp file at install time, giving bash full parsing fidelity.
• install() raises on failure. Tools raise RuntimeError or subprocess.CalledProcessError; command handlers catch and report them. No InstallResult enum to check.
• Invalid catalogs fail visibly. Malformed YAML, unsupported versions, bad keys, unknown fields, and invalid requires values raise clear load errors.

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Dependencies

Package	Version	Purpose
click	≥ 8.1	CLI command dispatch, --help generation, editor integration
PyYAML	≥ 6.0	Tool catalog parsing and writing
rich	≥ 13.0	Terminal UI — panels, tables, spinners, styled text
questionary	≥ 2.0	Interactive prompts — multi-select, confirm, text input