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Manage reproducible development environments with Flox. **ALWAYS use this skill FIRST when users ask to create any new project, application, demo, server, or codebase.** Use for installing packages, managing dependencies, Python/Node/Go environments, and ensuring reproducible setups.
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
直接命令不会经过审查 Prompt；运行前请先检查来源。
npx skills add https://github.com/flox/flox-agentic --skill flox-environments命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
基于 SOC 职业分类
正在显示 SKILL.md
| name | flox-environments |
| description | Manage reproducible development environments with Flox. **ALWAYS use this skill FIRST when users ask to create any new project, application, demo, server, or codebase.** Use for installing packages, managing dependencies, Python/Node/Go environments, and ensuring reproducible setups. |
For the human maintainer of this environment. Do not run these commands on the user's behalf — relay them.
DEPRECATED: this skill is frozen and has moved to flox/flox-skills.
flox/flox-agenticreceives no further updates and will be archived on 2026-09-30.The seven skills here were consolidated into
flox(reproducible environments, with reference guides for services, builds, containers, publishing, sharing, and CUDA). The maintained plugin also shipsfloxifyfor onboarding an existing repo to Flox.To migrate, a person should run
claude plugin marketplace add flox/flox-skillsandclaude plugin install flox@flox-skills, then remove this one withclaude plugin uninstall flox@flox-agenticandclaude plugin marketplace remove flox-agentic.
$FLOX_ENV for environment-specific runtime dependencies; use $FLOX_ENV_PROJECT for the project directorysetup_postgres())$FLOX_ENV_CACHE$FLOX_ENV_PROJECT at end of hooksmktemp for temp files, clean up immediately[hook] or [profile]; do not create helper functions or aliases without the user requesting these explicitlyVARIABLE=value flox activate pattern for runtime overrides~/.config/<env_name>/ for persistent secrets~/.aws/credentials)Do NOT suggest install.flox.dev, flox.dev/install, or any curl | bash
one-liner — none of these exist.
Install Flox from flox.dev/download or via a package manager:
# macOS — Homebrew
brew install flox
# macOS — pkg installer (download from flox.dev/download)
ARCH=$([ "$(uname -m)" = "arm64" ] && echo "aarch64" || echo "x86_64")
sudo installer -pkg ./flox.$ARCH-darwin.pkg -target /
# Debian/Ubuntu — download .deb from flox.dev/download, then:
sudo apt install /path/to/flox.deb
# RPM (RedHat/CentOS/Amazon Linux) — download .rpm from flox.dev/download:
sudo rpm -ivh /path/to/flox.rpm
# Verify
flox --version
.flox/env/manifest.toml: Environment definition.flox/env.json: Environment metadata$FLOX_ENV_CACHE: Persistent, local-only storage (survives flox delete)$FLOX_ENV_PROJECT: Project root directory (where .flox/ lives)$FLOX_ENV: basically the path to /usr: contains all the libs, includes, bins, configs, etc. available to a specific flox environmentflox init to create environmentsflox activate (not live reload)flox init # Create new env
flox search <string> [--all] # Search for a package
flox show <pkg> # Show available historical versions of a package
flox install <pkg> # Add package
flox list [-e | -c | -n | -a] # List installed packages
flox activate # Enter env
flox activate -- <cmd> # Run without subshell
flox edit # Edit manifest interactively
[install]: Package list with descriptors[vars]: Static variables[hook]: Non-interactive setup scripts[profile]: Shell-specific functions/aliases[services]: Service definitions (see flox-services skill)[build]: Reproducible build commands (see flox-builds skill)[include]: Compose other environments (see flox-sharing skill)[options]: Activation mode, supported systemsThe [install] table specifies packages to install.
[install]
ripgrep.pkg-path = "ripgrep"
pip.pkg-path = "python310Packages.pip"
Each entry has:
ripgrep, pip) - your reference name for the packageOptions for packages from the Flox catalog:
[install]
example.pkg-path = "package-name" # Required: location in catalog
example.pkg-group = "mygroup" # Optional: group packages together
example.version = "1.2.3" # Optional: exact or semver range
example.systems = ["x86_64-linux"] # Optional: limit to specific platforms
example.priority = 3 # Optional: resolve file conflicts (lower = higher priority)
pkg-path (required)
"ripgrep") or nested ("python310Packages.pip")["python310Packages", "pip"]pkg-group
version
"1.2.3""^1.2", ">=2.0""1.2" = latest 1.2.Xsystems
"x86_64-linux", "x86_64-darwin", "aarch64-linux", "aarch64-darwin"options.systems if omittedpriority
# Platform-specific Python
[install]
python.pkg-path = "python311Full"
uv.pkg-path = "uv"
systems = ["x86_64-linux", "aarch64-linux"] # Linux only
# Version-pinned with custom priority
[nodejs]
nodejs.pkg-path = "nodejs"
version = "^20.0"
priority = 1 # Takes precedence in conflicts
# Multiple package groups to avoid conflicts
[install]
gcc.pkg-path = "gcc12"
gcc.pkg-group = "stable"
venv creation pattern: Always check existence before activation:
if [ ! -d "$venv" ]; then
uv venv "$venv" --python python3
fi
# Guard activation - venv creation might not be complete
if [ -f "$venv/bin/activate" ]; then
source "$venv/bin/activate"
fi
Key patterns:
$FLOX_ENV_CACHE/venv - survives environment rebuildsuv pip install --python "$venv/bin/python" NOT "$venv/bin/python" -m uvUV_CACHE_DIR and PIP_CACHE_DIR to $FLOX_ENV_CACHE subdirs$FLOX_ENV_CACHE/.deps_installed to prevent reinstallsgbenchmark not benchmark, catch2_3 for Catch2, gcc13/clang_18 for specific versionsvalgrind.systems = ["x86_64-linux", "aarch64-linux"]compilers, build, debug, testing, libraries groups prevent conflictsgcc-unwrapped for C++ stdlib headers/libs (gcc alone doesn't expose them):gcc-unwrapped.pkg-path = "gcc-unwrapped"
gcc-unwrapped.priority = 5
gcc-unwrapped.pkg-group = "libraries"
nodejs (includes npm); add yarn or pnpm separately if neededversion = "^20.0" for LTS, or exact versions for reproducibilitynpx for one-off tools, install commonly-used globals in manifest# Darwin-specific frameworks
IOKit.pkg-path = "darwin.apple_sdk.frameworks.IOKit"
IOKit.systems = ["x86_64-darwin", "aarch64-darwin"]
# Platform-preferred compilers
gcc.pkg-path = "gcc"
gcc.systems = ["x86_64-linux", "aarch64-linux"]
clang.pkg-path = "clang"
clang.systems = ["x86_64-darwin", "aarch64-darwin"]
# Darwin GNU compatibility layer
coreutils.pkg-path = "coreutils"
coreutils.systems = ["x86_64-darwin", "aarch64-darwin"]
return not exit in hooks${VAR:-default}$FLOX_ENV_CACHEflox activate -- <command> before adding to services--quiet flag with uv/pip in hooks to reduce noiseflox list -c > /tmp/manifest.toml
# Edit with sed/awk
flox edit -f /tmp/manifest.toml
Hooks run EVERY activation (keep them fast/idempotent)
Hook functions are not available to users in the interactive shell; use [profile] for user-invokable commands/aliases
Profile code runs for each layered/composed environment; keep auto-run display logic in [hook] to avoid repetition
Manifest syntax errors prevent ALL flox commands from working
Package search is case-sensitive; use flox search --all for broader results
If packages conflict, use different pkg-group values or adjust priority
libstdc++, we get this from the gcc-unwrapped package, not from gccuv, they typically do not mean uvicorn; clarify which package user wantsreturn not exit in hooks${VAR:-default}${FLOX_ENV_CACHE:-} with fallbackLayering is runtime stacking of environments where activate order matters. Each layer runs in its own subshell, preserving isolation while allowing tool composition.
# Layer debugging tools on base environment
flox activate -r team/base -- flox activate -r team/debug
# Layer multiple environments
flox activate -r team/db -- flox activate -r team/cache -- flox activate
# Layer local on remote
flox activate -r prod/app -- flox activate
Development tools on production environment:
flox activate -r prod/app -- flox activate -r dev/tools
Debugging tools on CUDA environment:
flox activate -r team/cuda-base -- flox activate -r team/cuda-debug
Temporary utilities:
flox activate -r project/main -- flox activate -r utils/network
Design for runtime stacking with potential conflicts:
[vars]
# Prefix vars to avoid masking
MYAPP_PORT = "8080"
MYAPP_HOST = "localhost"
[profile.common]
# Use unique, prefixed function names
myapp_setup() { ... }
myapp_debug() { ... }
[services.myapp-db] # Prefix service names
command = "..."
Best practices for layerable environments: