Skill creator - knowledge skill for LLM to create skills

SKILL.md

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+---
+name: skill-creator
+description: Instructions for creating new VibeStack skills
+metadata:
+  version: "1.0.0"
+  vibestack:
+    main: false
+    type: knowledge
+---
+
+# Skill Creator
+
+This document teaches you how to create new VibeStack skills.
+
+## Before Creating a Skill
+
+1. **Check if it exists**: Query Gitea API to see if skill already exists
+   ```bash
+   curl -s "https://git.vibe-overflow.com/api/v1/repos/azat/{skill-name}" | jq '.id'
+   ```
+   If returns an ID, skill exists. Don't recreate.
+
+2. **Check installed skills**: Look in `/skills/` directory
+   ```bash
+   ls /skills/
+   ```
+
+## Skill Structure
+
+Every skill needs:
+
+```
+skill-name/
+├── SKILL.md              # Required: metadata + documentation
+└── scripts/
+    ├── autorun.sh        # Optional: install dependencies
+    └── run.sh            # Optional: start service (if skill runs continuously)
+```
+
+## SKILL.md Format
+
+```yaml
+---
+name: skill-name
+description: One-line description of what it does
+metadata:
+  version: "1.0.0"
+  vibestack:
+    main: false           # true only for the main orchestrator
+    requires:             # optional dependencies
+      - other-skill
+    metrics-port: 8080    # optional, if exposes metrics
+    type: knowledge       # optional, for non-running skills
+---
+
+# Skill Name
+
+Longer description of what the skill does.
+
+## Configuration
+
+| Variable | Default | Description |
+|----------|---------|-------------|
+
+## Usage
+
+How to use the skill...
+```
+
+## autorun.sh Pattern
+
+Runs once when skill is loaded. Must be **idempotent**.
+
+```bash
+#!/bin/bash
+set -e
+
+# Idempotent installation
+install_something() {
+    if command -v something &>/dev/null; then
+        echo "something already installed"
+        return 0
+    fi
+
+    echo "Installing something..."
+    apt-get update
+    apt-get install -y something
+    echo "something installed"
+}
+
+install_something
+
+echo "Skill setup complete"
+```
+
+## run.sh Pattern
+
+Runs the service. Use `exec` to replace shell.
+
+```bash
+#!/bin/bash
+set -e
+
+PORT="${SKILL_PORT:-8080}"
+
+echo "Starting service on port $PORT..."
+exec some-command --port "$PORT"
+```
+
+### For HTTP APIs (bash + socat)
+
+```bash
+#!/bin/bash
+set -e
+
+PORT="${SKILL_PORT:-8080}"
+
+# Create handler script
+cat > /tmp/handler.sh << 'HANDLER'
+#!/bin/bash
+
+read -r request_line
+method=$(echo "$request_line" | cut -d' ' -f1)
+path=$(echo "$request_line" | cut -d' ' -f2)
+
+# Read headers
+while read -r header; do
+    header=$(echo "$header" | tr -d '\r')
+    [ -z "$header" ] && break
+done
+
+send_response() {
+    local status="$1" body="$2"
+    printf "HTTP/1.1 %s\r\nContent-Type: application/json\r\nContent-Length: %d\r\n\r\n%s" \
+        "$status" "${#body}" "$body"
+}
+
+case "$path" in
+    /health) send_response "200 OK" '{"status":"ok"}' ;;
+    *) send_response "404 Not Found" '{"error":"not found"}' ;;
+esac
+HANDLER
+chmod +x /tmp/handler.sh
+
+echo "Starting HTTP server on port $PORT..."
+exec socat TCP-LISTEN:$PORT,reuseaddr,fork EXEC:/tmp/handler.sh
+```
+
+## Creating and Pushing a New Skill
+
+```bash
+# 1. Create directory
+mkdir -p /skills/new-skill/scripts
+
+# 2. Write SKILL.md
+cat > /skills/new-skill/SKILL.md << 'EOF'
+---
+name: new-skill
+description: What it does
+metadata:
+  version: "1.0.0"
+  vibestack:
+    main: false
+---
+
+# New Skill
+
+Documentation...
+EOF
+
+# 3. Write scripts (if needed)
+cat > /skills/new-skill/scripts/autorun.sh << 'EOF'
+#!/bin/bash
+set -e
+echo "Setup complete"
+EOF
+
+# 4. Create repo on Gitea
+curl -X POST "https://git.vibe-overflow.com/api/v1/user/repos" \
+  -H "Authorization: token $GIT_TOKEN" \
+  -H "Content-Type: application/json" \
+  -d '{"name":"new-skill","private":false,"description":"What it does"}'
+
+# 5. Initialize git and push
+cd /skills/new-skill
+git init
+git add .
+git commit -m "Initial skill implementation"
+git branch -M main
+git remote add origin "https://${GIT_USER}:${GIT_TOKEN}@git.vibe-overflow.com/${GIT_USER}/new-skill.git"
+git push -u origin main
+```
+
+## Validation Checklist
+
+Before pushing, verify:
+
+- [ ] SKILL.md exists with valid YAML frontmatter
+- [ ] `name` in frontmatter matches directory name
+- [ ] `description` is set
+- [ ] If has autorun.sh, it's idempotent (can run multiple times)
+- [ ] If has run.sh, it uses `exec` for the main process
+- [ ] No hardcoded secrets (use environment variables)
+- [ ] Repo doesn't already exist on Gitea
+
+## Common Patterns
+
+### Installing apt packages
+```bash
+apt-get update && apt-get install -y package-name
+```
+
+### Installing from GitHub releases
+```bash
+VERSION="1.0.0"
+curl -sSL "https://github.com/org/repo/releases/download/v${VERSION}/binary" -o /usr/local/bin/binary
+chmod +x /usr/local/bin/binary
+```
+
+### Reading environment with defaults
+```bash
+PORT="${SKILL_PORT:-8080}"
+HOST="${SKILL_HOST:-0.0.0.0}"
+```
+
+### Exporting for other skills
+```bash
+mkdir -p /run/vibestack
+echo "SOME_URL=http://localhost:$PORT" > /run/vibestack/skill-name.env
+```
+
+## Environment Variables Available
+
+- `SKILLS_DIR` - Skills directory (default: `/skills`)
+- `GIT_HOST` - Git server (default: `git.vibe-overflow.com`)
+- `GIT_USER` - Git user (default: `azat`)
+- `GIT_TOKEN` - Git auth token