agent-traits

A set of reusable PHP traits for changing an agent's pending task while it runs. Traits are shared pieces of class behavior that can add a specific function to an agent.

In plain words
What is it for?
Use it to add lifecycle behavior such as checking that an agent's output follows a defined schema, or to manage other supported agent activities.
Why use it?
It avoids writing the same agent-management behavior from scratch for every agent.

Agent

Install

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.

agentmods
npx agentmods add agents/usethefork/synapse/agent-traits
Clone the repo
git clone --depth 1 https://github.com/UseTheFork/synapse
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 381 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00381
Opus 5 $0.00000 $0.00191
Sonnet 5 $0.00000 $0.00076
Haiku 4.5 $0.00000 $0.00038

Measured yesterday against content hash 6ab1cfda5a82, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agent-traits 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 yesterday.

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.

docs/agents/agent-traits.md · 48 lines

What it actually says

Agent Traits

Synapse provides a set of traits to simplify managing various agent activities. These traits allow you to modify the PendingAgentTask during the agent lifecycle.

Example

For instance, to add output validation to your agent, you would first implement the HasOutputSchema interface, which introduces the resolveOutputSchema method for defining your validation rules. Then, use the ValidatesOutputSchema trait, and you're all set! To learn more about the ValidatesOutputSchema trait, see the ValidatesOutputSchema Trait Section.

use UseTheFork\Synapse\Agent;
use UseTheFork\Synapse\Contracts\Agent\HasOutputSchema;
use UseTheFork\Synapse\Contracts\Integration;
use UseTheFork\Synapse\Contracts\Memory;
use UseTheFork\Synapse\Integrations\OpenAIIntegration;
use UseTheFork\Synapse\Memory\CollectionMemory;
use UseTheFork\Synapse\Traits\Agent\ValidatesOutputSchema;
use UseTheFork\Synapse\ValueObject\SchemaRule;

class ExampleAgent extends Agent implements HasOutputSchema
{
    use ValidatesOutputSchema;

    protected string $promptView = 'synapse::Prompts.SimplePrompt';

    public function resolveIntegration(): Integration
    {
        return new OpenAIIntegration;
    }

    public function resolveMemory(): Memory
    {
        return new CollectionMemory;
    }

    public function resolveOutputSchema(): array
    {
        return [
            SchemaRule::make([
                'name' => 'answer',
                'rules' => 'required|string',
                'description' => 'Your final answer to the query.',
            ]),
        ];
    }
}

To explore all traits that come with Synapse, visit the traits section.

Changes

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.

  1. yesterday First seen · 48 lines · 0 tokens per session scan A 6ab1cfda5a82

Subscribe to this mod's changes

agent-traits is an agent published in the GitHub repository UseTheFork/synapse (50 stars, last pushed 1y ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 381 tokens. 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.

Related

Other agents, from other repositories