fix(skills-perso): exclude framework/gstack skills from listing

Use git history heuristic: skills added in bulk commits (5+ SKILL.md
files at once) are framework installs, not user-created. Only show
skills added in small commits (1-3 files).

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

skills/skills-perso/SKILL.md

@@ -1,9 +1,9 @@
 ---
 name: skills-perso
 description: |
-  List all personal skills installed in ~/.claude/skills/.
-  Shows only local skills (excludes symlinked/external skills like gstack or emil-design-eng).
-  For each skill, displays its name and description from SKILL.md frontmatter.
+  List personal (user-created) skills from ~/.claude/skills/.
+  Excludes framework/gstack skills and symlinked/external skills.
+  Shows only skills the user wrote themselves.
   Trigger: "skills-perso", "mes skills", "list my skills", "quels skills", "skills perso".
 argument-hint: ""
 disable-model-invocation: false
@@ -15,15 +15,38 @@ allowed-tools:
 
 # skills-perso
 
-List all personal skills from `~/.claude/skills/`, excluding symlinked/external directories.
+List only **user-created** skills from `~/.claude/skills/`, excluding framework
+(gstack) skills, symlinked directories, and external skills.
+
+## How to detect user-created skills
+
+Use git history to identify skills added in bulk commits (framework installs).
+A skill is considered **framework** if its SKILL.md was first added in a commit
+that also added 5+ other SKILL.md files. User-created skills are added in small
+commits (1-3 SKILL.md files at a time).
+
+Run this command to get the list of personal skills:
+
+```bash
+for dir in ~/.claude/skills/*/; do
+  [ -L "${dir%/}" ] && continue
+  skill=$(basename "${dir%/}")
+  skill_file="${dir}SKILL.md"
+  [ -f "$skill_file" ] || continue
+  commit=$(git -C ~/Documents/claude log --diff-filter=A --format='%H' -1 -- "skills/${skill}/SKILL.md" 2>/dev/null)
+  [ -z "$commit" ] && continue
+  count=$(git -C ~/Documents/claude diff-tree --no-commit-id --name-only -r "$commit" -- 'skills/*/SKILL.md' 2>/dev/null | wc -l)
+  [ "$count" -le 3 ] && echo "$skill"
+done
+```
 
 ## Steps
 
-1. List all directories in `~/.claude/skills/` that are NOT symlinks (use `find ~/.claude/skills -maxdepth 1 -mindepth 1 -type d -not -type l | sort`).
-2. For each directory found, read the first 15 lines of `SKILL.md` if it exists.
+1. Run the detection command above to get the list of personal skill names.
+2. For each personal skill, read the first 15 lines of its `SKILL.md`.
 3. Extract `name` and `description` from the YAML frontmatter.
 4. Display a clean table with two columns: **Skill** and **Description** (first line of description only, trimmed).
-5. At the end, show the total count.
+5. At the end, show the total count of personal skills (and mention how many framework skills were excluded).
 
 ## Output format
 
@@ -35,8 +58,7 @@ List all personal skills from `~/.claude/skills/`, excluding symlinked/external
 | feat  | Small feature implementation (1-5 files)... |
 | ...   | ... |
 
-**Total: N skills**
+**Total: N personal skills** (M framework skills excluded)
 ```
 
 Keep descriptions to one line (~80 chars max, truncate with "..." if needed).
-Do NOT include symlinked directories (they point to external/shared skills).