> ## Documentation Index
> Fetch the complete documentation index at: https://docs.51ultron.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Skills

> 35+ specialized AI sub-agents you invoke from chat. Each does one thing exceptionally well.

A skill is a focused AI sub-agent with its own model, tool set, token budget, and instructions. You don't configure skills — you describe what you need and Ultron routes to the right one.

## How skill execution works

```text theme={null}
You: "Write a cold email to the Head of Growth at Linear."
    ↓
Chat detects intent → routes to cold-email skill
    ↓
Skill loads: model=kimi-k2, maxTurns=8,
  tools=[web_search, scrape_website, lookup_leads, save_content]
    ↓
Context built:
  ├── Your business profile (ICP, voice, competitors)
  ├── Past cold emails in memory (what worked, what didn't)
  └── Relevant lessons (quality gate failures, style corrections)
    ↓
Kimi K2 runs the skill agent loop:
  ├── web_search("Linear Head of Growth 2026")  ← parallel
  ├── scrape_website("linear.app")              ← parallel
  └── lookup_leads("Linear")
    ↓
Email drafted → 6-point quality gate applied → passed
    ↓
Result returned to chat
Memory saved: ["skill-run", "sales", "cold-email"]
Activity logged
```

## Concurrency

Max 2 skills run simultaneously per session. If you invoke a third while two are active, it queues and starts the moment a slot opens. Rate limits (429 responses) trigger exponential backoff (1s → 2s → 4s) with up to 3 retries.

## Execution modes

| Mode       | How it works                                         | Best for                      |
| ---------- | ---------------------------------------------------- | ----------------------------- |
| **Inline** | Skill continues in the main conversation thread      | Short tasks, iterative work   |
| **Fork**   | Skill runs as isolated child agent, results returned | Long research, heavy tool use |

## Skills by category

<CardGroup cols={2}>
  <Card title="Research" icon="microscope" href="/skills/research/competitive-analysis">
    Competitive analysis, company deep-dive, pricing research, meeting prep.
  </Card>

  <Card title="Lead Generation" icon="crosshairs" href="/skills/lead-gen/find-decision-makers">
    Find decision makers, ICP matching, lead scoring, trigger events.
  </Card>

  <Card title="Sales" icon="paper-plane" href="/skills/sales/cold-email">
    Cold email, follow-up sequences, objection handling, pre/post call.
  </Card>

  <Card title="Content" icon="pen" href="/skills/content/linkedin-post">
    LinkedIn posts, social content for all platforms.
  </Card>

  <Card title="Operations" icon="chart-line" href="/skills/ops/morning-briefing">
    Morning briefing, pipeline review.
  </Card>

  <Card title="How skills work" icon="gears" href="/skills/using-skills">
    Invocation, progress streaming, memory auto-save.
  </Card>
</CardGroup>