Files
antigravity-skills-reference/skills/apify-actor-development/references/standby-mode.md
Ahmed Rehan 2f55f046b9 feat: add 12 official Apify agent-skills for web scraping & data extraction (#165)
* feat: add 12 official Apify skills for web scraping and data extraction

Add the complete Apify agent-skills collection as official vendor skills,
bringing the total skill count from 954 to 966.

New skills:
- apify-actor-development: Develop, debug, and deploy Apify Actors
- apify-actorization: Convert existing projects into Apify Actors
- apify-audience-analysis: Audience demographics across social platforms
- apify-brand-reputation-monitoring: Track reviews, ratings, and sentiment
- apify-competitor-intelligence: Analyze competitor strategies and pricing
- apify-content-analytics: Track engagement metrics and campaign ROI
- apify-ecommerce: E-commerce data scraping for pricing intelligence
- apify-influencer-discovery: Find and evaluate influencers
- apify-lead-generation: B2B/B2C lead generation from multiple platforms
- apify-market-research: Market conditions and geographic opportunities
- apify-trend-analysis: Discover emerging trends across platforms
- apify-ultimate-scraper: Universal AI-powered web scraper

Existing skill fixes:
- design-orchestration: Add missing description, fix markdown list spacing
- multi-agent-brainstorming: Add missing description, fix markdown list spacing

Registry and documentation updates:
- Update skill count to 966+ across README.md, README.vi.md
- Add Apify to official sources in SOURCES.md and all README variants
- Register new skills in catalog.json, skills_index.json, bundles.json, aliases.json
- Update CATALOG.md category counts (data-ai: 152, infrastructure: 95)

Validation script improvements:
- Raise description length limit from 200 to 1024 characters
- Add empty description validation check
- Apply PEP 8 formatting (line length, spacing, trailing whitespace)

* refactor: truncate skill descriptions in SKILL.md files and revert  description length validation to 200 characters.

* feat: Add `apify-ultimate-scraper` to data-ai and move `apify-lead-generation` from business to general categories.
2026-03-01 10:02:50 +01:00

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Markdown

# Actor Standby Mode Reference
## JavaScript and TypeScript
- **NEVER disable standby mode (`usesStandbyMode: false`) in `.actor/actor.json` without explicit permission** - Actor Standby mode solves this problem by letting you have the Actor ready in the background, waiting for the incoming HTTP requests. In a sense, the Actor behaves like a real-time web server or standard API server instead of running the logic once to process everything in batch. Always keep `usesStandbyMode: true` unless there is a specific documented reason to disable it
- **ALWAYS implement readiness probe handler for standby Actors** - Handle the `x-apify-container-server-readiness-probe` header at GET / endpoint to ensure proper Actor lifecycle management
You can recognize a standby Actor by checking the `usesStandbyMode` property in `.actor/actor.json`. Only implement the readiness probe if this property is set to `true`.
### Readiness Probe Implementation Example
```javascript
// Apify standby readiness probe at root path
app.get('/', (req, res) => {
res.writeHead(200, { 'Content-Type': 'text/plain' });
if (req.headers['x-apify-container-server-readiness-probe']) {
res.end('Readiness probe OK\n');
} else {
res.end('Actor is ready\n');
}
});
```
Key points:
- Detect the `x-apify-container-server-readiness-probe` header in incoming requests
- Respond with HTTP 200 status code for both readiness probe and normal requests
- This enables proper Actor lifecycle management in standby mode
## Python
- **NEVER disable standby mode (`usesStandbyMode: false`) in `.actor/actor.json` without explicit permission** - Actor Standby mode solves this problem by letting you have the Actor ready in the background, waiting for the incoming HTTP requests. In a sense, the Actor behaves like a real-time web server or standard API server instead of running the logic once to process everything in batch. Always keep `usesStandbyMode: true` unless there is a specific documented reason to disable it
- **ALWAYS implement readiness probe handler for standby Actors** - Handle the `x-apify-container-server-readiness-probe` header at GET / endpoint to ensure proper Actor lifecycle management
You can recognize a standby Actor by checking the `usesStandbyMode` property in `.actor/actor.json`. Only implement the readiness probe if this property is set to `true`.
### Readiness Probe Implementation Example
```python
# Apify standby readiness probe
from http.server import SimpleHTTPRequestHandler
class GetHandler(SimpleHTTPRequestHandler):
def do_GET(self):
# Handle Apify standby readiness probe
if 'x-apify-container-server-readiness-probe' in self.headers:
self.send_response(200)
self.end_headers()
self.wfile.write(b'Readiness probe OK')
return
self.send_response(200)
self.end_headers()
self.wfile.write(b'Actor is ready')
```
Key points:
- Detect the `x-apify-container-server-readiness-probe` header in incoming requests
- Respond with HTTP 200 status code for both readiness probe and normal requests
- This enables proper Actor lifecycle management in standby mode