add gstack skill symlinks, graphify skill, and gitignore updates

Track all gstack-provided skill symlinks (autoplan, browse, qa, etc.)
and the graphify skill. Add .claude/, graphify-out/, .ctx7-cache/ to
gitignore to exclude local/generated files from the repo.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/health/SKILL.md

@@ -1,23 +0,0 @@
----
-name: health
-description: Run setup diagnostic — check symlinks, plugins, permissions, token budget
-argument-hint: (no arguments needed)
-disable-model-invocation: true
-allowed-tools: Bash
----
-
-Run the health check script:
-
-```bash
-bash $HOME/.claude/doctor.sh 2>/dev/null || {
-  REPO=$(dirname "$(readlink "$HOME/.claude/CLAUDE.md" 2>/dev/null)" 2>/dev/null)
-  bash "$REPO/doctor.sh"
-}
-```
-
-After displaying the doctor.sh output:
-- **CRITICAL token (>30%)** → suggest `/plugin-check` to disable unused plugins; list the heaviest ones.
-- **WARNING token (>15%)** → note which toggle plugins are active and not needed.
-- **Errors (symlinks, agents)** → show the exact fix command (`bash link.sh`).
-- **Warnings only** → confirm setup is functional, note any action recommended.
-- **All pass** → confirm healthy and operational.

skills/health/SKILL.md

@@ -0,0 +1 @@
+/home/bchanot-ubuntu/Documents/claude/skills-external/gstack/health/SKILL.md