Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add khalilbenaz/claude-skills-collection --skill spawnergit clone --depth 1 https://github.com/khalilbenaz/claude-skills-collectionWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/spawner)<a href="https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/spawner"><img src="https://agentmods.dev/badge/skills/khalilbenaz/claude-skills-collection/spawner/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/khalilbenaz/claude-skills-collection/spawner"><img src="https://agentmods.dev/badge/skills/khalilbenaz/claude-skills-collection/spawner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00083 | $0.02408 |
| Opus 5 | $0.00042 | $0.01204 |
| Sonnet 5 | $0.00017 | $0.00482 |
| Haiku 4.5 | $0.00008 | $0.00241 |
Grade A, and why
spawner scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 251 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Spawner
Quand utiliser ce skill
| Condition | Spawner requis ? |
|---|---|
| Nombre d'agents inconnu à l'avance | Oui |
| Agents identiques, volume variable | Oui (+ pool-manager) |
| Agents fixes et connus en design-time | Non — câbler statiquement |
| Besoin de parallélisme homogène | Préférer agent-pool-manager |
| Types d'agents différents selon le contexte | Oui |
Workflow en étapes
1. Concevoir les templates d'agents
Chaque template encode une spécialisation. Définir au minimum :
from dataclasses import dataclass, field
from typing import Optional
@dataclass
class AgentTemplate:
name: str # identifiant du gabarit
system_prompt: str # supporte les placeholders {domain}, {task}…
tools: list[str] # liste des tools autorisés
model: str = "claude-sonnet-4-5" # modèle par défaut
max_tokens: int = 4096
timeout_seconds: int = 120
Exemples de templates courants :
researcher—search_web,fetch_url, modèle léger (haiku)coder—bash,read_file,write_file, modèle puissant (sonnet/opus)reviewer— lecture seule, modèle sonnetsummarizer— aucun tool, haiku suffit
2. Critères de décision : quel modèle choisir ?
| Criticité / Complexité | Modèle recommandé |
|---|---|
| Analyse simple, résumé | claude-haiku-4 |
| Tâche de code standard | claude-sonnet-4-5 |
| Raisonnement multi-étapes, debugging | claude-opus-4 |
| Réponses temps-réel < 2 s | claude-haiku-4 |
Règle : ne jamais utiliser opus pour les agents répétitifs à fort volume — le coût est 10–20× celui de haiku.
3. Implémenter la factory
import uuid
from datetime import datetime, timezone
@dataclass
class AgentInstance:
id: str = field(default_factory=lambda: str(uuid.uuid4()))
template_name: str = ""
status: str = "created" # created | running | done | failed | terminated
created_at: datetime = field(default_factory=lambda: datetime.now(timezone.utc))
parent_id: Optional[str] = None
result: Optional[str] = None
error: Optional[str] = None
class AgentFactory:
_templates: dict[str, AgentTemplate] = {}
_registry: dict[str, AgentInstance] = {}
_max_concurrent: int = 10
@classmethod
def register_template(cls, t: AgentTemplate) -> None:
cls._templates[t.name] = t
@classmethod
def spawn(cls, template_name: str, context: dict, parent_id: str | None = None) -> AgentInstance:
running = sum(1 for a in cls._registry.values() if a.status == "running")
if running >= cls._max_concurrent:
raise RuntimeError(f"Limite {cls._max_concurrent} agents concurrents atteinte")
tpl = cls._templates[template_name]
agent = AgentInstance(template_name=template_name, parent_id=parent_id)
cls._registry[agent.id] = agent
enriched_prompt = tpl.system_prompt.format(**context)
agent.status = "running"
print(f"[SPAWN] {agent.id} ({template_name}) parent={parent_id} at {agent.created_at.isoformat()}")
return agent
@classmethod
def terminate(cls, agent_id: str, result: str | None = None, error: str | None = None) -> None:
if a := cls._registry.get(agent_id):
a.status = "failed" if error else "terminated"
a.result, a.error = result, error
@classmethod
def gc(cls, timeout_s: int = 300) -> list[str]:
"""Libère les agents bloqués en 'running' depuis trop longtemps."""
now = datetime.now(timezone.utc)
stale = [
a.id for a in cls._registry.values()
if a.status == "running" and (now - a.created_at).total_seconds() > timeout_s
]
for aid in stale:
cls.terminate(aid, error="GC timeout")
return stale
@classmethod
def active(cls) -> list[AgentInstance]:
return [a for a in cls._registry.values() if a.status == "running"]
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 251 lines · 83 tokens per session scan A cb43d340601a
spawner is a skill published in the GitHub repository khalilbenaz/claude-skills-collection (22 stars, last pushed 16d ago), licensed MIT. It adds 83 tokens to every session and 2,408 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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