How PrimeAgent Handles Complex Reasoning Tasks: A Deep Dive into the /effort Command

PrimeAgent handles complex reasoning tasks by delegating cognitive effort to underlying LLM providers through the /effort slash command, which maps user-selected reasoning levels to provider-specific API parameters across OpenAI, Anthropic, Mistral, and Amazon Bedrock.

The PrimeIntellect-ai/prime-agent repository implements a unified interface for controlling how much computational effort an LLM expends on complex reasoning tasks. Rather than implementing custom reasoning logic, PrimeAgent exposes provider-native reasoning controls through a single, consistent command structure that adapts requests automatically based on the selected provider.

The /effort Command Interface

PrimeAgent exposes reasoning control through the /effort slash command, aliased as /thinking, which allows users to dynamically adjust reasoning depth during interactive sessions. This command accepts discrete effort levels that instruct the underlying model to allocate varying amounts of compute to chain-of-thought generation.

Available Reasoning Levels

Users can select from five distinct reasoning tiers:

• low – Minimal reasoning effort, suitable for straightforward queries
• medium – Balanced reasoning for standard complex tasks
• high – Extended thinking for multi-step problems
• xhigh – Maximum reasoning depth for intricate analysis (supported on select providers)
• max – Absolute maximum cognitive allocation (Anthropic-specific)

When invoked, the command updates the UI hint adjacent to the model selector, providing immediate visual confirmation of the active reasoning configuration.

Provider-Specific Reasoning Implementations

PrimeAgent normalizes the user-facing effort parameter into provider-specific payload fields through dedicated provider modules located in packages/ai/src/providers/.

OpenAI Completions

For OpenAI chat completions, PrimeAgent maps the effort level to the reasoning_effort field. In packages/ai/src/providers/openai-completions.ts, the request builder injects this parameter directly into the API payload when constructing the streaming request.

// Conceptual implementation in openai-completions.ts
const requestBody = {
  model: selectedModel,
  reasoning_effort: effortLevel, // "low", "medium", "high", or "xhigh"
  messages: conversationHistory
};

Anthropic Claude

Anthropic models utilize a nested configuration structure. The packages/ai/src/providers/anthropic.ts module translates effort levels into output_config.effort, supporting the full spectrum from "low" through "max".

// Implementation pattern in anthropic.ts
const requestBody = {
  model: modelId,
  output_config: {
    effort: effortLevel // "low", "medium", "high", "xhigh", or "max"
  }
};

Mistral and Amazon Bedrock Adaptations

Mistral implementations in the provider layer clamp effort values to the model's maximum supported reasoning depth, typically restricting inputs to "low" through "high". Amazon Bedrock follows the Anthropic pattern, utilizing output_config.effort with automatic clamping logic to ensure compatibility across the AWS model ecosystem.

The Streaming Architecture for Reasoning Responses

Once the provider-specific payload is constructed, packages/ai/src/stream.ts manages the unified streaming pipeline. This core module opens an HTTP connection to the selected provider and forwards reasoning tokens incrementally to the terminal UI. The streaming architecture ensures that users receive real-time visibility into the model's chain-of-thought process without waiting for the complete response generation.

The streaming layer operates agnostically to the reasoning effort level, treating the effort parameter as a request configuration rather than a processing directive, thereby maintaining consistent latency characteristics across different reasoning depths.

Interactive Mode Integration

The slash command infrastructure resides in packages/coding-agent/src/core/slash-commands.ts, which registers the /effort command and defines its argument hints and validation logic. This registry integrates with packages/coding-agent/src/modes/interactive/interactive-mode.ts, which wires the command to the interactive selector UI.

When a user executes /effort high in an interactive session, the command processor updates the session state, modifies the UI hint next to the model selector, and ensures subsequent requests carry the high-effort flag until explicitly changed.

Programmatic Usage Examples

Developers can configure reasoning effort programmatically when initializing the assistant:

import { createAssistant } from '@prime-agent/ai';

// Initialize with high reasoning effort for complex analysis
const assistant = createAssistant({
  model: 'anthropic.claude-opus-4.7',
  effort: 'high', // Controls reasoning depth
});

// The library automatically injects output_config.effort: "high"
const result = await assistant.chat('Explain quantum entanglement in detail.');
console.log(result);

For interactive CLI usage:

# In an interactive PrimeAgent session

/effort max

# UI updates to show [max] indicator

# Subsequent queries use maximum reasoning depth

Summary

• PrimeAgent delegates reasoning complexity to underlying LLM providers rather than implementing intermediate reasoning layers.
• The /effort command provides five levels of reasoning control (low, medium, high, xhigh, max) through a unified interface.
• Provider adapters in packages/ai/src/providers/ normalize effort levels into API-specific fields like reasoning_effort (OpenAI) and output_config.effort (Anthropic/Bedrock).
• Unified streaming via packages/ai/src/stream.ts delivers reasoning output in real-time regardless of effort level.
• Interactive integration through slash-commands.ts and interactive-mode.ts enables dynamic reasoning adjustment during active sessions.

Frequently Asked Questions

What is the difference between /effort and /thinking?

There is no functional difference between /effort and /thinking. According to the source code in packages/coding-agent/src/core/slash-commands.ts, /thinking is simply an alias for /effort, providing users with an intuitive alternative command name when configuring reasoning behavior.

Which providers support the max reasoning level?

Only Anthropic (Claude models) supports the "max" reasoning level through the output_config.effort parameter. OpenAI supports up to "xhigh" via reasoning_effort, while Mistral and Amazon Bedrock clamp values to their respective maximum supported tiers, typically "high" or "xhigh" depending on the specific model version.

How does PrimeAgent handle unsupported effort levels?

PrimeAgent implements automatic clamping logic within each provider module. If a user requests "max" effort on an OpenAI or Mistral model, the provider adapter in packages/ai/src/providers/ automatically adjusts the value to the highest supported tier for that specific provider and model combination, preventing API errors while maximizing available reasoning capacity.

Can I set reasoning effort programmatically without the slash command?

Yes. The createAssistant function accepts an effort parameter in its configuration options, as demonstrated in the programmatic examples. This approach sets the default reasoning level for all subsequent interactions with that assistant instance, bypassing the need for interactive slash commands in automated scripts or integrated applications.

{
  "mcpServers": {
    "instagit": {
      "command": "npx",
      "args": ["-y", "instagit@latest"]
    }
  }
}