Fix agents prompt

[paul-nechifor]

• change it to use a python file so we don't have to include the .txt file in the package
• update it to be more concise and update the old skill names

[chatgpt-codex-connector]

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[greptile-apps]

Greptile Summary

Refactored agent system prompt from file-based loading to an inline Python constant. The PR eliminates the need to package .txt files by defining SYSTEM_PROMPT directly in system_prompt.py. The prompt content was updated to be more concise and references correct skill names (speak instead of speak_aloud, navigate_with_text, tag_location, start_exploration, stop_movement, get_gps_position_for_queries, set_gps_travel_points, where_am_i, map_query, wait, and execute_sport_command).

Key changes:

• Deleted constants.py and .txt prompt files from assets/agent/
• Converted get_system_prompt() function to SYSTEM_PROMPT constant
• Updated all imports across demo files and test fixtures
• Verified all skill names in prompt match actual function definitions

Confidence Score: 5/5

• Safe to merge - clean refactoring with no functional changes
• All changes are straightforward refactoring that improves maintainability by eliminating file I/O. All imports updated correctly, no dangling references found, and skill names verified against actual implementations
• No files require special attention

Important Files Changed

Filename	Overview
dimos/agents/system_prompt.py	Converted system prompt from file-based loading to a Python constant, making it more concise and updating skill names
dimos/agents/agent.py	Updated import to use SYSTEM_PROMPT constant instead of get_system_prompt() function
dimos/agents/constants.py	Deleted file - no longer needed since prompt is now a Python constant

Sequence Diagram

sequenceDiagram
    participant Agent as Agent
    participant SystemPrompt as system_prompt.py
    participant Constants as constants.py (deleted)
    participant AssetFiles as prompt*.txt (deleted)
    
    Note over Agent,AssetFiles: Before PR
    Agent->>Constants: Import AGENT_SYSTEM_PROMPT_PATH
    Agent->>SystemPrompt: Call get_system_prompt()
    SystemPrompt->>Constants: Get AGENT_SYSTEM_PROMPT_PATH
    SystemPrompt->>AssetFiles: Read prompt_agents.txt file
    AssetFiles-->>SystemPrompt: Return file contents
    SystemPrompt-->>Agent: Return cached prompt string
    
    Note over Agent,AssetFiles: After PR
    Agent->>SystemPrompt: Import SYSTEM_PROMPT constant
    SystemPrompt-->>Agent: Return prompt string directly
    Note over Constants,AssetFiles: Files deleted - no longer needed

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