docs: Higgsfield pack in README and CHANGELOG

README.md

@@ -348,6 +348,55 @@ under `defaultMode: auto` (this config's default) `ask` rules were observed
 auto-approving with no prompt raised (LRN-153), so an `ask` entry would have
 declared an intent without gating anything.
 
+### Higgsfield CLI
+
+`@higgsfield/cli` (bins `higgsfield` and `higgs`) generates images, video,
+audio and brand media from the terminal. One browser login, no API key.
+Generation spends account credits.
+
+```bash
+npm i -g @higgsfield/cli
+higgsfield auth login       # browser flow
+```
+
+`make plugin` does both (Step 8.6 installs the CLI, then offers the login in
+an interactive terminal) and clones the skills of
+[higgsfield-ai/skills](https://github.com/higgsfield-ai/skills) into
+`skills-external/higgsfield-*`. `make update` refreshes the CLI and the
+skills, and `make doctor` reports the CLI and its session. The copies are
+machine-owned and gitignored. They follow upstream `main`, so a prompt
+change arrives with no diff to review, and a skill that upstream removes
+keeps its last local copy.
+
+The pack is off by default and belongs to no profile. It costs nothing until
+you ask for it, and no `profile set` touches it:
+
+```bash
+bash lib/toggle-external.sh enable higgsfield            # media skills
+bash lib/toggle-external.sh enable higgsfield-websites   # landing-page aid
+bash lib/toggle-external.sh disable higgsfield
+```
+
+`higgsfield` links a fixed list of seven media skills: generate, soul-id,
+product-photoshoot, brandkit, marketplace-cards, video-explainer and
+youtube-thumbnail. The list is `HIGGSFIELD_MEDIA_SKILLS` in
+`lib/toggle-external.sh`. A skill that upstream adds later is synced and
+reported, and stays unlinked until it is added there.
+
+`higgsfield-websites` is kept apart. Here it helps with landing pages inside
+the design stack (assets, references), and `higgsfield website
+create|deploy|publish` stays unused. Claude enables either toggle itself on
+an explicit ask (Skill routing in `CLAUDE.global.md`) and checks the price
+with `higgsfield generate cost` before a paid run.
+
+The skills are cloned, not installed with `npx skills add`: that installer
+links every skill into `~/.claude/skills` on each refresh, which would undo
+the off-by-default state.
+
+The package ships its binary through a postinstall script. If npm holds that
+script back, `higgsfield` exists on PATH and fails at once; reinstall with
+`npm install -g --allow-scripts=@higgsfield/cli @higgsfield/cli`.
+
 ---
 
 ## Diagnostic and maintenance