feat(cortex-prompt-harness): add top-agent prompts integration

[echobt]

Summary

Port Platform Network's top-agent system prompts to Cortex prompt harness.

Source: Top Agent from Term Challenge - ranked top with 11/15 challenges completed.

Changes

• Add top_agent.rs module with system prompt constants
• Implement TopAgentPromptBuilder for fluent prompt construction
• Add TopAgentPresets: coding_assistant, research_assistant, code_reviewer, minimal
• Add tool mapping constants (read_file → Read, write_file → Write, etc.)
• Export new types from the prompts module

Testing

• 23 unit tests covering all functionality
• All tests passing

Compatibility

Fully compatible with existing prompt system - no breaking changes.

[greptile-apps]

Greptile Overview

Greptile Summary

This PR successfully integrates Platform Network's top-agent autonomous coding prompts into the Cortex prompt harness system, providing a comprehensive and well-structured addition to the codebase.

Key Changes

• New module top_agent.rs (~1,828 lines) with 23 modular prompt sections covering autonomous operation, backup-first data safety, process management, and workspace cleanup
• Fluent builder API (TopAgentPromptBuilder) enabling dynamic prompt construction with section toggling, variable substitution, and capability contexts
• Six curated presets for common use cases: coding assistant, research assistant, code reviewer, minimal, data safety, and process management
• Tool mapping documentation showing conceptual mapping between top-agent and Cortex tools
• Comprehensive test suite with 23 unit tests covering all builder methods, presets, and tool mappings
• Clean integration into existing prompt harness via mod.rs with proper re-exports

Code Quality

• Well-documented with detailed rustdoc comments and usage examples
• Consistent with existing Cortex patterns (similar to CortexPromptBuilder)
• Thorough test coverage ensures reliability
• Clear separation of concerns with modular section constants
• #[must_use] annotations on builder methods prevent accidental dropped values

Confidence Score: 5/5

• This PR is safe to merge - it's a pure additive feature with no breaking changes
• Score reflects high-quality implementation with comprehensive tests, excellent documentation, clean integration, and no impact on existing code
• No files require special attention

Important Files Changed

Filename	Overview
src/cortex-prompt-harness/src/prompts/top_agent.rs	Adds comprehensive top-agent prompt system with 23 modular sections, builder API, and 6 presets
src/cortex-prompt-harness/src/prompts/mod.rs	Integrates top_agent module with proper documentation and re-exports

Sequence Diagram

sequenceDiagram
    participant User
    participant Cortex
    participant TopAgentPrompts
    participant Builder
    participant Presets

    User->>Cortex: Request top-agent prompt
    Cortex->>TopAgentPrompts: Import module
    
    alt Use Preset
        Cortex->>Presets: coding_assistant()
        Presets->>Builder: new()
        Builder->>Builder: Load 23 sections
        Presets->>Builder: with_code_execution()
        Presets->>Builder: with_file_operations()
        Builder->>Presets: build() → prompt string
        Presets->>Cortex: Return preset prompt
    else Custom Build
        Cortex->>Builder: new()
        Builder->>Builder: Load all sections (enabled)
        Cortex->>Builder: without_section("CLEANUP")
        Builder->>Builder: Disable section
        Cortex->>Builder: with_variable("key", "val")
        Builder->>Builder: Store variable
        Cortex->>Builder: build()
        Builder->>Builder: Filter enabled sections
        Builder->>Builder: Apply variable substitution
        Builder->>Builder: Join sections with separators
        Builder->>Cortex: Return custom prompt
    else Direct Access
        Cortex->>TopAgentPrompts: TOP_AGENT_SYSTEM_PROMPT
        TopAgentPrompts->>Cortex: Return full prompt constant
    end
    
    Cortex->>User: Provide configured prompt

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