diff --git a/skills/nixos-workflow/SKILL.md b/skills/nixos-workflow/SKILL.md
index 3ec5a11..d2601b1 100644
--- a/skills/nixos-workflow/SKILL.md
+++ b/skills/nixos-workflow/SKILL.md
@@ -1,7 +1,7 @@
 ---
 name: nixos-workflow
 description: STRICT workflow for managing Pi assets via Gitea on NixOS
-version: 1.1.0
+version: 1.2.0
 ---
 
 # NixOS Gitea Asset Manager (STRICT)
@@ -19,18 +19,42 @@ All assets MUST be managed in the local Git-controlled directory:
 ## 🏗 ASSET DEPLOYMENT WORKFLOW
 When the user asks for a new tool or skill, you MUST follow these steps exactly:
 
-1. **Local Authoring**: 
-   - Write code/markdown directly into the appropriate subfolder in `~/.agents/` (e.g., `extensions/` or `skills/`).
-   - If cloning an external repo, immediately `rm -rf .git` inside that folder to prevent submodule issues. Also inside that folder remove '.gitignore' if it is there.
-2. **Local Dependency Check**: 
-   - If an extension, run `npm install` inside that specific subfolder.
-3. **Gitea Synchronization**: 
+1. **Local Authoring** — the asset MUST be a directory under `~/.agents/`:
+   - Skills: `skills/<name>/SKILL.md` (+ optional supporting files).
+   - Extensions: `extensions/<name>/index.ts` (or `index.js`), or a `package.json` with a `"pi": { "extensions": ["./index.ts"] }` manifest.
+   - **Vendoring an external npm package**: copy the published package into `extensions/<name>/` (e.g. `npm pack <pkg>` then extract). If cloning a git repo instead, immediately `rm -rf .git` inside that folder (prevents submodule issues) and remove `.gitignore` if present.
+2. **Local Dependency Check + Security**:
+   - If an extension, run `npm install` inside that specific subfolder. `node_modules/` is gitignored (see `.gitignore`) — pi runs `npm install` automatically after pulling from Gitea, so deps are never committed.
+   - Run `vet scan -D .` (npm-security skill) and follow the vet → npq → socket workflow for any installs.
+3. **Gitea Synchronization**:
    - `cd /home/sam/.agents`
    - `git add .`
    - `git commit -m "Add [asset name]"`
    - `git push origin main`
-4. **Project Activation**: 
-   - Instruct the user to add the relative path (e.g., `"extensions/my-tool/index.ts"`) to their current project's `.pi/settings.json`.
+4. **Project Activation — via `/config-add`, NEVER by hand**:
+   - The user activates per project with `/config-add skill <name>` or `/config-add ext <name>`, then `/reload`.
+   - **Do NOT hand-edit any `.pi/settings.json`**, and do NOT add bare `"npm:..."` package entries to settings. `/config-add`/`/config-remove`/`/config-show`/`/config-list` (pi-config extension) are the ONLY sanctioned interface to project settings.
+
+## 🔍 DISCOVERY & ACTIVATION (pi-config commands)
+
+`/config-add`, `/config-remove`, `/config-show`, `/config-list` are provided by the **pi-config** extension (`~/.agents/extensions/pi-config/index.ts`). Mechanics that matter:
+
+- **Discovery is directory-based.** The commands list subdirectory names under `~/.agents/skills/` and `~/.agents/extensions/`. If an asset is not a directory there, it is invisible to `/config-list`/`/config-show` and `/config-add` will refuse it ("not found in ~/.agents/...").
+- `/config-add` resolves the entry point (`skills/<name>`, `extensions/<name>/index.ts`, or the `pi.extensions` list from the folder's `package.json`) and appends it to the project's `~/.agents` package entry in `.pi/settings.json`, then asks for `/reload`.
+- Project settings **replace** (not merge) global settings — each folder loads only what it needs, keeping the LLM context lean. This is the point of the whole workflow: no clutter.
+- **Global-only packages** (e.g. pi-memctx, @tintinweb/*) are NOT per-project assets — they live in the home-manager-managed global `~/.pi/agent/settings.json` (`/etc/nixos/home/sam/home.nix`) and are out of scope for `/config-add`.
+
+## ✅ WORKED EXAMPLE — adding `pi-langfuse` (2026-08-03)
+
+External npm extension (Langfuse LLM observability for pi) vendored + activated:
+
+1. `npm pack pi-langfuse@1.5.8` → extracted into `~/.agents/extensions/pi-langfuse/` (contains `package.json` with `pi.extensions: ["./index.ts"]`)
+2. `npm install` inside the folder (deps gitignored; pi reinstalls on pull)
+3. `vet scan -D .` → clean (242 packages)
+4. `git add . && git commit && git push` → Gitea `pi-config` (commit `bc91a15`)
+5. Project activation: `/config-add ext pi-langfuse` → writes `"extensions/pi-langfuse/index.ts"` to the project's `.pi/settings.json`, then `/reload`
+
+The extension's own config lives at `~/.pi/agent/pi-langfuse/config.json` (`publicKey`/`secretKey`/`host` → `http://192.168.20.13:3001`). Commands: `/langfuse-setup`, `/langfuse-status`. Full documentation: `/home/sam/obsidian/300 areas/350 AI/Pi Agent Extensions & Skills.md` (section "pi-langfuse — LLM Observability for Pi").
 
 ## ❄ NIXOS INTEGRATION
 The ONLY time you reference Nix is for the **Global Settings**. Confirm the user's `home.nix` contains a `settings.json` that points to the Gitea source: