feat: initial m3ta-home structure

- flake.nix with nixpkgs, home-manager, nix-colors, m3ta-nixpkgs, agenix, NUR inputs
- lib/mkHome.nix: compose HM config from user + identity + context + sets
- profiles/base: shell, cli-tools, secrets (always loaded)
- profiles/contexts/desktop: WM, apps, theme, ghostty
- profiles/contexts/server: minimal headless
- profiles/sets/coding: core (git, direnv, jq, rg), editor, lsp, languages, agents
- profiles/sets/gaming: steam, gamescope, gpu
- profiles/sets/media: obs, ffmpeg, kdenlive, handbrake, yt-dlp
- users/m3tam3re/identities: private.nix, work.nix (git, jj, ssh per identity)
- users/m3tam3re/preferences: cliphist, difftastic, base packages

profiles/sets/coding/agents/agents.nix

@@ -0,0 +1,85 @@
+# AI agent system — OpenCode, Pi, and MCP server configuration.
+# Relies on coding.agents options provided by home/common/default.nix
+# (inputs.m3ta-nixpkgs.homeManagerModules.default).
+{
+  config,
+  inputs,
+  lib,
+  pkgs,
+  videoDrivers ? [],
+  ...
+}: {
+  # Agent Git Identity configuration
+  # Note: Uses existing gitea SSH key (m3tam3re identity) for push auth
+  coding.agents.gitIdentity = {
+    enable = true;
+    name = "m3ta-chiron";
+    email = "m3ta-chiron@agentmail.to";
+    sshKey = "/home/m3tam3re/.ssh/gitea";
+  };
+
+  imports = [
+    # OpenCode and Pi agent configurations
+    ./opencode.nix
+    ./pi.nix
+  ];
+
+  coding.agents.skills = {
+    agentsInput = inputs.agents;
+    externalSkills = [
+      {
+        src = inputs.skills-anthropic;
+        selectSkills = ["pdf" "docx" "frontend-design"];
+      }
+      {src = inputs.skills-superpowers;}
+      {src = inputs.skills-vercel;}
+      {src = inputs.skills-basecamp;}
+      {src = inputs.skills-kestra;}
+    ];
+  };
+
+  programs.mcp = {
+    enable = true;
+    servers = {
+      DeepWiki = {
+        url = "https://mcp.deepwiki.com/mcp";
+      };
+      Ref = {
+        command = "bash";
+        args = ["-c" "REF_API_KEY=$(cat /run/agenix/ref-key) exec bunx ref-tools-mcp@latest"];
+      };
+      Exa = {
+        command = "bash";
+        args = ["-c" "EXA_API_KEY=$(cat /run/agenix/exa-key) exec bunx exa-mcp-server@latest tools=web_search_exa"];
+      };
+      Outline = {
+        url = "https://wiki.az-gruppe.com/mcp";
+      };
+      ContextMode = {
+        command = "bash";
+        args = ["-c" "exec bunx context-mode@latest"];
+      };
+      Honcho = {
+        command = "bash";
+        args = [
+          "-c"
+          ''exec bunx mcp-remote@latest https://mcp.honcho.dev --header "Authorization:Bearer $(cat /run/agenix/honcho-key)" --header "X-Honcho-User-Name:m3tam3re"''
+        ];
+      };
+    };
+  };
+
+  home.packages = with pkgs; [
+    agenix-cli
+    agent-browser
+    beads
+    pi
+    (qmd.override {
+      vulkanSupport = videoDrivers == ["amdgpu"];
+      cudaSupport = videoDrivers == ["nvidia"];
+    })
+    # opencode-desktop
+    openshell
+    openspec
+  ];
+}

profiles/sets/coding/agents/opencode.nix

@@ -0,0 +1,260 @@
+{
+  inputs,
+  lib,
+  ...
+}: {
+  coding.agents.opencode = {
+    enable = true;
+    agentsInput = inputs.agents;
+  };
+
+  coding.opencode = {
+    enable = true;
+
+    ohMyOpencodeSettings = {
+      agents = {
+        sisyphus.model = "litellm/claude-opus-4-6";
+        oracle.model = "litellm/claude-sonnet-4-6";
+        librarian.model = "litellm/claude-sonnet-4-6";
+        explore.model = "litellm/claude-haiku-4-5";
+        multimodal-looker.model = "litellm/gpt-5.3-codex";
+        prometheus.model = "litellm/claude-opus-4-6";
+        metis.model = "litellm/claude-opus-4-6";
+        momus.model = "litellm/claude-opus-4-6";
+        atlas.model = "litellm/claude-sonnet-4-6";
+      };
+      categories = {
+        visual-engineering.model = "zai-coding-plan/glm-5.1";
+        ultrabrain.model = "litellm/claude-opus-4-6";
+        deep.model = "litellm/claude-sonnet-4-6";
+        artistry.model = "zai-coding-plan/glm-5.1";
+        quick.model = "litellm/claude-haiku-4-5";
+        unspecified-low.model = "litellm/claude-sonnet-4-6";
+        unspecified-high.model = "litellm/claude-opus-4-6";
+        writing.model = "zai-coding-plan/glm-5.1";
+      };
+    };
+  };
+
+  # Keep TUI settings in programs.opencode.tui to satisfy OpenCode v1.2.15+.
+  programs.opencode.tui.theme = "opencode";
+
+  # Override legacy default settings to avoid deprecated TUI keys in settings.
+  programs.opencode.settings = lib.mkForce {
+    plugin = ["oh-my-openagent"];
+    formatter = {
+      alejandra = {
+        command = ["alejandra" "-q" "-"];
+        extensions = [".nix"];
+      };
+    };
+
+    # Security: permission hardening for OpenCode
+    # Last matching rule wins. Glob patterns: * = any chars, ? = single char.
+    # ~ and $HOME are expanded to the user's home directory.
+    # external_directory gates paths outside the working directory.
+    permission = {
+      # External directory access: ask by default, allow safe paths
+      "external_directory" = {
+        "*" = "ask";
+        "/nix/store/**" = "allow";
+        "/tmp/**" = "allow";
+      };
+
+      # Read access: allow by default, deny sensitive paths
+      "read" = {
+        "*" = "allow";
+        "~/.ssh/**" = "deny";
+        "~/.gnupg/**" = "deny";
+        "~/.aws/**" = "deny";
+        "~/.kube/**" = "deny";
+        "~/.config/gh/**" = "deny";
+        "~/.config/gcloud/**" = "deny";
+        "~/.config/op/**" = "deny";
+        "~/.config/sops/**" = "deny";
+        "/run/agenix/**" = "deny";
+        "~/.pi/agent/auth.json" = "deny";
+        "~/.pi/agent/sessions/**" = "deny";
+        "*.env" = "deny";
+        "*.env.*" = "deny";
+        "*.pem" = "deny";
+        "*.key" = "deny";
+        "*.p12" = "deny";
+        "*.pfx" = "deny";
+        "*id_rsa*" = "deny";
+        "*id_ed25519*" = "deny";
+        "*id_ecdsa*" = "deny";
+        "*.example.env" = "allow";
+        "*.sample.env" = "allow";
+        "*.test.env" = "allow";
+        ".env.example" = "allow";
+        ".env.sample" = "allow";
+        ".env.test" = "allow";
+        "~/.ssh/*.pub" = "allow";
+        "*.pub" = "allow";
+        "*.csr" = "allow";
+      };
+
+      # Edit access: ask by default, deny sensitive paths
+      "edit" = {
+        "*" = "ask";
+        "~/.ssh/**" = "deny";
+        "~/.gnupg/**" = "deny";
+        "~/.aws/**" = "deny";
+        "~/.kube/**" = "deny";
+        "~/.config/gh/**" = "deny";
+        "~/.config/gcloud/**" = "deny";
+        "~/.config/op/**" = "deny";
+        "~/.config/sops/**" = "deny";
+        "/run/agenix/**" = "deny";
+        "~/.pi/agent/auth.json" = "deny";
+        "~/.pi/agent/sessions/**" = "deny";
+        "*.env" = "deny";
+        "*.env.*" = "deny";
+        "*.pem" = "deny";
+        "*.key" = "deny";
+        "*.p12" = "deny";
+        "*.pfx" = "deny";
+        "*id_rsa*" = "deny";
+        "*id_ed25519*" = "deny";
+        "*id_ecdsa*" = "deny";
+        "~/.ssh/*.pub" = "allow";
+        "*.pub" = "allow";
+        "*.csr" = "allow";
+      };
+
+      # Glob patterns: same rules as read for file matching
+      "glob" = {
+        "*" = "allow";
+        "~/.ssh/**" = "deny";
+        "~/.gnupg/**" = "deny";
+        "/run/agenix/**" = "deny";
+        "*.env" = "deny";
+        "*.env.*" = "deny";
+        "*.pem" = "deny";
+        "*.key" = "deny";
+        "*.p12" = "deny";
+        "*.pfx" = "deny";
+      };
+
+      # Grep: allow search, but deny searching for secrets
+      "grep" = {
+        "*" = "allow";
+        "~/.ssh/**" = "deny";
+        "~/.gnupg/**" = "deny";
+        "/run/agenix/**" = "deny";
+        "*PASSWORD*" = "ask";
+        "*SECRET*" = "ask";
+        "*API_KEY*" = "ask";
+        "*PRIVATE_KEY*" = "ask";
+      };
+
+      # Bash: ask by default, deny dangerous and env-leak commands
+      "bash" = {
+        "*" = "ask";
+        "git status*" = "allow";
+        "git diff*" = "allow";
+        "git log*" = "allow";
+        "git branch*" = "allow";
+        "git show*" = "allow";
+        "git remote*" = "allow";
+        "nix --version" = "allow";
+        "nix eval*" = "allow";
+        "nix build*" = "allow";
+        "nix develop*" = "allow";
+        "nix shell*" = "allow";
+        "nix search*" = "allow";
+        "alejandra*" = "allow";
+        "git add*" = "allow";
+        "git commit*" = "allow";
+        "git push*" = "ask";
+        "git pull*" = "allow";
+        "rm *" = "ask";
+        "rm -rf *" = "deny";
+        "sudo *" = "ask";
+        "env" = "deny";
+        "printenv" = "deny";
+        "cat /proc/*/environ" = "deny";
+        "gpg *--export-secret*" = "deny";
+        "ssh-add -D" = "deny";
+        "docker run --privileged*" = "deny";
+        "curl *| *sh" = "deny";
+        "wget *| *sh" = "deny";
+      };
+
+      # Web fetch: ask for sensitive URLs
+      "webfetch" = {
+        "*" = "ask";
+        "https://api.github.com*" = "allow";
+        "https://search.nixos.org*" = "allow";
+      };
+
+      # Doom loop guard
+      "doom_loop" = "ask";
+    };
+
+    # AZ-Gruppe LiteLLM endpoint + available models
+    provider = {
+      litellm = {
+        npm = "@ai-sdk/openai-compatible";
+        name = "LiteLLM (AZ-Gruppe)";
+        options.baseURL = "https://llm.az-gruppe.com/v1";
+        models = {
+          "gpt-5.2" = {
+            name = "GPT-5.2";
+            limit = {
+              context = 400000;
+              output = 128000;
+            };
+          };
+          "gpt-5.3-codex" = {
+            name = "GPT-5.3 Codex";
+            limit = {
+              context = 400000;
+              output = 128000;
+            };
+          };
+          "claude-haiku-4-5" = {
+            name = "Claude Haiku 4.5";
+            options = {
+              thinking = {
+                type = "enabled";
+                budget_tokens = 16000;
+              };
+            };
+            limit = {
+              context = 200000;
+              output = 64000;
+            };
+          };
+          "claude-sonnet-4-6" = {
+            name = "Claude Sonnet 4.6";
+            options = {
+              thinking = {
+                type = "enabled";
+                budget_tokens = 16000;
+              };
+            };
+            limit = {
+              context = 200000;
+              output = 64000;
+            };
+          };
+          "claude-opus-4-6" = {
+            name = "Claude Opus 4.6";
+            options = {
+              thinking = {
+                type = "enabled";
+                budget_tokens = 16000;
+              };
+            };
+            limit = {
+              context = 200000;
+              output = 128000;
+            };
+          };
+        };
+      };
+    };
+  };
+}

profiles/sets/coding/agents/pi.nix

@@ -0,0 +1,269 @@
+{inputs, ...}: {
+  coding.agents.pi = {
+    enable = true;
+    agentsInput = inputs.agents;
+
+    modelOverrides = {
+      chiron = "minimax/MiniMax-M2.7";
+      chiron-forge = "minimax/MiniMax-M2.7";
+    };
+
+    # Coding rules for Pi agent
+    # Rules sourced from AGENTS repo
+    codingRules = {
+      # Language-specific rules
+      languages = [
+        "nix" # Nix language conventions
+      ];
+
+      # Standard concerns from AGENTS repo
+      concerns = [
+        "coding-style" # General coding principles
+        "naming" # Naming conventions (camelCase, snake_case, etc.)
+        "documentation" # Documentation standards
+        "testing" # Testing guidelines (Arrange-Act-Assert)
+        "git-workflow" # Conventional commits, branch naming
+        "git-identity" # Git identity configuration for agents
+        "project-structure" # Project layout conventions
+      ];
+
+      # No framework-specific rules for NixOS config
+      frameworks = [];
+    };
+
+    settings = {
+      packages = [
+        "npm:@dreadedzombie/pi-init"
+        "npm:@plannotator/pi-extension"
+        "npm:@thesethrose/pi-zai-provider"
+        "npm:pi-agent-browser-native"
+        "npm:pi-beads-extension"
+        "npm:pi-lens"
+        "npm:pi-markdown-preview"
+        "npm:pi-mcp-adapter"
+        "npm:pi-powerline-footer"
+        "npm:pi-prompt-template-model"
+        "npm:pi-subagents"
+        "npm:pi-tool-display"
+        "npm:pi-web-access"
+        "git:github.com/hk-vk/pi-connect"
+      ];
+
+      defaultProvider = "minimax";
+      defaultModel = "MiniMax-M2.7";
+      defaultThinkingLevel = "high";
+    };
+
+    # pi-guardrails: strict security config
+    # NOTE: Path access checks are lexical (not symlink-safe).
+    # NOTE: Local project .pi/extensions/guardrails.json can override same rule IDs.
+    #       For immutable global policies, consider a wrapper or upstream patch.
+    guardrails = {
+      enable = true;
+      config = {
+        enabled = true;
+        applyBuiltinDefaults = true;
+
+        onboarding = {
+          completed = true;
+        };
+
+        features = {
+          policies = true;
+          permissionGate = true;
+          pathAccess = true;
+        };
+
+        pathAccess = {
+          mode = "ask";
+          allowedPaths = [
+            "/nix/store/"
+            "/tmp/"
+          ];
+        };
+
+        policies = {
+          rules = [
+            # ── SSH keys ───────────────────────────────────────────
+            {
+              id = "home-ssh";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "~/.ssh/**";}
+                {pattern = "~/.ssh/*_rsa";}
+                {pattern = "~/.ssh/*_ed25519";}
+                {pattern = "~/.ssh/*.pem";}
+              ];
+              allowedPatterns = [
+                {pattern = "~/.ssh/*.pub";}
+              ];
+            }
+
+            # ── GPG keys ─────────────────────────────────────────
+            {
+              id = "home-gpg";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "~/.gnupg/**";}
+                {pattern = "~/*.gpg";}
+                {pattern = "~/.gpg-agent.conf";}
+              ];
+            }
+
+            # ── AWS credentials ────────────────────────────────────
+            {
+              id = "home-aws";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "~/.aws/**";}
+                {pattern = "~/.aws/credentials";}
+                {pattern = "~/.aws/config";}
+              ];
+            }
+
+            # ── Kubernetes configs ────────────────────────────────
+            {
+              id = "home-kube";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "~/.kube/**";}
+                {pattern = "*kubeconfig*";}
+              ];
+            }
+
+            # ── Cloud CLI configs ────────────────────────────────
+            {
+              id = "home-config";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "~/.config/gh/**";}
+                {pattern = "~/.config/gcloud/**";}
+                {pattern = "~/.config/op/**";}
+                {pattern = "~/.config/sops/**";}
+              ];
+            }
+
+            # ── agenix secrets ───────────────────────────────────
+            {
+              id = "agenix-secrets";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "/run/agenix/**";}
+              ];
+            }
+
+            # ── Pi auth and sessions ────────────────────────────
+            {
+              id = "pi-auth-sessions";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "~/.pi/agent/auth.json";}
+                {pattern = "~/.pi/agent/sessions/**";}
+              ];
+            }
+
+            # ── Environment files ─────────────────────────────────
+            {
+              id = "secret-files";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = true;
+              patterns = [
+                {pattern = ".env";}
+                {pattern = ".env.*";}
+                {pattern = ".dev.vars";}
+              ];
+              allowedPatterns = [
+                {pattern = "*.example.env";}
+                {pattern = "*.sample.env";}
+                {pattern = "*.test.env";}
+                {pattern = ".env.example";}
+                {pattern = ".env.sample";}
+                {pattern = ".env.test";}
+              ];
+            }
+
+            # ── Private keys and certificates ───────────────────
+            {
+              id = "private-keys";
+              enabled = true;
+              protection = "noAccess";
+              onlyIfExists = false;
+              patterns = [
+                {pattern = "*.pem";}
+                {pattern = "*.key";}
+                {pattern = "*.p12";}
+                {pattern = "*.pfx";}
+                {pattern = "*id_rsa*";}
+                {pattern = "*id_ed25519*";}
+                {pattern = "*id_ecdsa*";}
+              ];
+              allowedPatterns = [
+                {pattern = "*.pub";}
+                {pattern = "*.csr";}
+              ];
+            }
+          ];
+        };
+
+        permissionGate = {
+          explainCommands = false;
+          # Auto-deny patterns: env leakage and credential dumping
+          autoDenyPatterns = [
+            {
+              pattern = "\\benv\\b";
+              regex = true;
+              description = "env command (may dump environment)";
+            }
+            {
+              pattern = "\\bprintenv\\b";
+              regex = true;
+              description = "printenv command (dumps environment variables)";
+            }
+            {
+              pattern = "/proc/[0-9]+/environ";
+              regex = true;
+              description = "reading process environment files";
+            }
+            {
+              pattern = "gpg\\s+--export-secret-keys";
+              regex = true;
+              description = "GPG secret key export";
+            }
+            {
+              pattern = "gpg\\s+--export-secret-subkeys";
+              regex = true;
+              description = "GPG secret subkey export";
+            }
+            {
+              pattern = "ssh-add\\s+-D";
+              regex = true;
+              description = "delete all SSH identities";
+            }
+            {
+              pattern = "\\b(op|pass)\\s+(read|show|get)";
+              regex = true;
+              description = "password manager read operations";
+            }
+          ];
+        };
+      };
+    };
+
+    # MCP servers auto-inherited from programs.mcp in default.nix
+  };
+}

profiles/sets/coding/core/default.nix

@@ -0,0 +1,16 @@
+# profiles/sets/coding/core/default.nix — Core coding tools (always loaded with coding set).
+#
+# Provides git (package + difftastic), direnv, and essential CLI dev tools.
+# Git USER SETTINGS (name, email, signing) are managed by the identity module,
+# NOT here — this module only handles git tooling.
+#
+# Note: git.nix is copied from nixos-config/home/coding/git/git.nix
+# It handles git.enable, difftastic, jujutsu, etc. but identity-specific
+# settings (user.name, user.email) should be set by the identity module.
+{...}: {
+  imports = [
+    ./git.nix
+    ./direnv.nix
+    ./packages.nix
+  ];
+}

profiles/sets/coding/core/direnv.nix

@@ -0,0 +1,8 @@
+# profiles/sets/coding/core/direnv.nix
+# direnv + nix-direnv for automatic per-project environments.
+{...}: {
+  programs.direnv = {
+    enable = true;
+    nix-direnv.enable = true;
+  };
+}

profiles/sets/coding/core/git.nix

@@ -0,0 +1,41 @@
+# Git configuration with signing, aliases, and global ignore.
+# Identity and host-specific SSH keys are set per-host in home/m3tam3re/.
+{
+  lib,
+  pkgs,
+  ...
+}:
+with lib; {
+  programs.git = {
+    enable = true;
+    signing.format = null;
+    settings = {
+      user = {
+        name = lib.mkDefault "m3tam3re";
+        email = lib.mkDefault "p@m3ta.dev";
+      };
+      core.excludesfile = "~/.gitignore_global";
+      init.defaultBranch = "master";
+      alias = {
+        st = "status";
+        logd = "log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit";
+      };
+    };
+  };
+
+  programs.difftastic.enable = true;
+
+  programs.jujutsu = {
+    enable = true;
+    settings = {
+      user = {
+        email = "m@m3tam3re.com";
+        name = "Sascha Koenig";
+      };
+    };
+  };
+
+  home.packages = with pkgs; [
+    lazygit
+  ];
+}

profiles/sets/coding/core/packages.nix

@@ -0,0 +1,13 @@
+# profiles/sets/coding/core/packages.nix
+# Essential CLI dev tools — always available when coding set is active.
+{pkgs, ...}: {
+  home.packages = with pkgs; [
+    curl
+    fd
+    file
+    hyperfine
+    jq
+    ripgrep
+    tree
+  ];
+}

profiles/sets/coding/default.nix

@@ -0,0 +1,22 @@
+# profiles/sets/coding/default.nix — Coding environment aggregator.
+#
+# Imports all coding sub-modules. Individual features are controlled
+# via enable options (e.g. coding.editors.neovim.enable = true).
+#
+# Structure:
+#   core/       — Always-on when coding set is active (git, direnv, core packages)
+#   editor/     — Neovim (both contexts), Zed (desktop only)
+#   lsp/        — Language server protocol tools
+#   languages/  — Python, JS, Rust, Go, TypeScript (each with enable option)
+#   agents/     — AI coding agents (opencode, etc.)
+#   packages    — Optional extra packages (bruno, insomnia)
+{...}: {
+  imports = [
+    ./core
+    ./editor
+    ./lsp
+    ./agents/agents.nix
+    ./languages
+    ./packages.nix
+  ];
+}

profiles/sets/coding/editor/default.nix

@@ -0,0 +1,6 @@
+# Editor aggregator — delegates to m3ta-nixpkgs editor modules.
+{...}: {
+  imports = [
+    ./neovim.nix
+  ];
+}

profiles/sets/coding/editor/neovim.nix

@@ -0,0 +1,7 @@
+# NeoVim base configuration via m3ta-nixpkgs coding.editors module.
+# The option `coding.editors.neovim.enable` is declared by
+# inputs.m3ta-nixpkgs.homeManagerModules.default — no re-declaration here.
+{...}: {
+  # Placeholder for host-agnostic NeoVim overrides.
+  # Set coding.editors.neovim.enable = true in per-host files to activate.
+}

profiles/sets/coding/languages/default.nix

@@ -0,0 +1,10 @@
+# Language runtimes — Python, JavaScript, Rust, Go, TypeScript.
+{...}: {
+  imports = [
+    ./python.nix
+    ./javascript.nix
+    ./rust-toolchain.nix
+    ./go.nix
+    ./typescript.nix
+  ];
+}

profiles/sets/coding/languages/go.nix

@@ -0,0 +1,19 @@
+# Go toolchain — compiler and language server.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.languages.go;
+in {
+  options.coding.languages.go.enable = mkEnableOption "Go toolchain";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      go
+      gopls
+    ];
+  };
+}

profiles/sets/coding/languages/javascript.nix

@@ -0,0 +1,25 @@
+# JavaScript/TypeScript runtime — Node.js and Bun.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.languages.javascript;
+  npmGlobalPrefix = "${config.home.homeDirectory}/.npm-global";
+in {
+  options.coding.languages.javascript.enable = mkEnableOption "JavaScript runtime (Node.js + Bun)";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      nodejs
+      bun
+    ];
+
+    home.file.".npmrc".text = ''
+      prefix=${npmGlobalPrefix}
+    '';
+    home.sessionVariables.NPM_CONFIG_PREFIX = npmGlobalPrefix;
+  };
+}

profiles/sets/coding/languages/python.nix

@@ -0,0 +1,35 @@
+# Python runtime with pip and uv.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.languages.python;
+in {
+  options.coding.languages.python = {
+    enable = mkEnableOption "Python runtime with pip and uv";
+    extraPackages = mkOption {
+      type = types.listOf types.package;
+      default = [];
+      example = literalExpression "[ pkgs.python3Packages.numpy ]";
+      description = "Additional Python packages to include";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      (pkgs.python3.withPackages (ps:
+        with ps;
+          [
+            uv
+          ]
+          ++ cfg.extraPackages))
+      (writeShellScriptBin "pip" "exec uv pip $@")
+      (writeShellScriptBin "pip3" "exec uv pip $@")
+      pyrefly
+      ruff
+    ];
+  };
+}

profiles/sets/coding/languages/rust-toolchain.nix

@@ -0,0 +1,20 @@
+# Rust toolchain — compiler, package manager, and language server.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.languages.rustToolchain;
+in {
+  options.coding.languages.rustToolchain.enable = mkEnableOption "Rust toolchain";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      rustc
+      cargo
+      rust-analyzer
+    ];
+  };
+}

profiles/sets/coding/languages/typescript.nix

@@ -0,0 +1,19 @@
+# TypeScript support — language server and type checking tools.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.languages.typescript;
+in {
+  options.coding.languages.typescript.enable = mkEnableOption "TypeScript support";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      typescript
+      typescript-language-server
+    ];
+  };
+}

profiles/sets/coding/lsp/default.nix

@@ -0,0 +1,6 @@
+# LSP aggregator — language server protocol tooling.
+{...}: {
+  imports = [
+    ./servers.nix
+  ];
+}

profiles/sets/coding/lsp/servers.nix

@@ -0,0 +1,23 @@
+# LSP server configuration — language servers for the development environment.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.lsp;
+in {
+  options.coding.lsp.enable = mkEnableOption "enable LSP servers";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      # Nix
+      nixd
+      # General
+      typescript-language-server
+      tailwindcss-language-server
+      pyrefly
+    ];
+  };
+}

profiles/sets/coding/packages.nix

@@ -0,0 +1,20 @@
+# Additional coding packages — API clients and GUI development tools.
+# Opt-in since not all coding hosts need these desktop-oriented tools.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.coding.packages;
+in {
+  options.coding.packages.enable = mkEnableOption "additional coding packages (bruno, insomnia)";
+
+  config = mkIf cfg.enable {
+    home.packages = [
+      pkgs.bruno
+      pkgs.insomnia
+    ];
+  };
+}

profiles/sets/gaming/default.nix

@@ -0,0 +1,8 @@
+# Gaming profile aggregator — Steam platform, Gamescope session, and AMD GPU tools.
+{...}: {
+  imports = [
+    ./steam.nix
+    ./gamescope.nix
+    ./gpu.nix
+  ];
+}

profiles/sets/gaming/gamescope.nix

@@ -0,0 +1,16 @@
+# Gamescope — Valve's micro-compositor for Steam gaming sessions.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.gaming.gamescope;
+in {
+  options.profiles.gaming.gamescope.enable = mkEnableOption "enable Gamescope session";
+
+  config = mkIf cfg.enable {
+    home.packages = [pkgs.gamescope];
+  };
+}

profiles/sets/gaming/gpu.nix

@@ -0,0 +1,21 @@
+# AMD GPU tools — ROCm runtime, monitoring, and Vulkan utilities for gaming.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.gaming.gpu;
+in {
+  options.profiles.gaming.gpu.enable = mkEnableOption "enable AMD GPU tools";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      rocmPackages.rocm-runtime
+      rocmPackages.rocm-smi
+      rocmPackages.rocminfo
+      vulkan-tools
+    ];
+  };
+}

profiles/sets/gaming/steam.nix

@@ -0,0 +1,21 @@
+# Steam gaming platform with Steam Deck compatibility tools and gaming utilities.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.gaming.steam;
+in {
+  options.profiles.gaming.steam.enable = mkEnableOption "enable Steam gaming";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      gamemode
+      goverlay
+      mangohud
+      protonplus
+    ];
+  };
+}

profiles/sets/media/default.nix

@@ -0,0 +1,10 @@
+# Media profile aggregator — OBS, FFmpeg, yt-dlp, Kdenlive, and HandBrake.
+{...}: {
+  imports = [
+    ./obs.nix
+    ./ffmpeg.nix
+    ./yt-dlp.nix
+    ./kdenlive.nix
+    ./handbrake.nix
+  ];
+}

profiles/sets/media/ffmpeg.nix

@@ -0,0 +1,24 @@
+# FFmpeg — full-featured multimedia processing toolchain.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.media.ffmpeg;
+in {
+  options.profiles.media.ffmpeg.enable = mkEnableOption "enable FFmpeg tools";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      amf
+      ffmpeg_6-full
+      gst_all_1.gstreamer
+      gst_all_1.gst-vaapi
+      pamixer
+      pavucontrol
+      qpwgraph
+    ];
+  };
+}

profiles/sets/media/handbrake.nix

@@ -0,0 +1,21 @@
+# HandBrake — open-source video transcoder.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.media.handbrake;
+in {
+  options.profiles.media.handbrake.enable = mkEnableOption "enable HandBrake transcoder";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      handbrake
+      gimp
+      inkscape
+      libation
+    ];
+  };
+}

profiles/sets/media/kdenlive.nix

@@ -0,0 +1,16 @@
+# Kdenlive — KDE non-linear video editor.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.media.kdenlive;
+in {
+  options.profiles.media.kdenlive.enable = mkEnableOption "enable Kdenlive video editor";
+
+  config = mkIf cfg.enable {
+    home.packages = [pkgs.kdePackages.kdenlive];
+  };
+}

profiles/sets/media/obs.nix

@@ -0,0 +1,21 @@
+# OBS Studio — open broadcaster software for streaming and recording.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.media.obs;
+in {
+  options.profiles.media.obs.enable = mkEnableOption "enable OBS Studio";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      v4l-utils
+    ];
+
+    # OBS is managed via NixOS programs.obs-studio at the system level.
+    # Home-manager only installs supporting tools.
+  };
+}

profiles/sets/media/yt-dlp.nix

@@ -0,0 +1,32 @@
+# yt-dlp and media playback — YouTube downloader with MPV integration.
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+with lib; let
+  cfg = config.profiles.media.ytDlp;
+in {
+  options.profiles.media.ytDlp.enable = mkEnableOption "enable yt-dlp and media playback";
+
+  config = mkIf cfg.enable {
+    home.packages = with pkgs; [
+      plexamp
+      unimatrix
+      webcord
+    ];
+
+    programs.mpv = {
+      enable = true;
+      bindings = {
+        WHEEL_UP = "seek 10";
+        WHEEL_DOWN = "seek -10";
+      };
+      config = {
+        profile = "gpu-hq";
+        ytdl-format = "bestvideo+bestaudio";
+      };
+    };
+  };
+}