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LIMITATIONS.md

Phase 14 - Technical Debt & System Limitations

This document catalogs the known issues, technical debt, platform constraints, and unsupported features in Project Hermit (v0.1.9).

1. Known Technical Debt & Architectural Gaps

  1. Token Cost Escalation on Complex Untouched Functions:

    • Observation: Phase 1 scheduling targets complex untouched functions. LLM synthesis attempts on intricate algorithms frequently fail verification tests during initial iterations, driving average synthesis costs up to ~91,600 tokens per merge.
    • Impact: High API token consumption during early exploration phases.
    • Mitigation in v0.1.9: Added skill_budgets token gating to block attempts exceeding 500,000 tokens on un-merged functions unless explicitly overridden.

  2. Linux-Specific RAM Disk & Resource Limits:

    • Observation: sandbox.py relies directly on Linux-specific kernel features (mount -t tmpfs, resource.RLIMIT_AS, resource.RLIMIT_CPU, /proc filesystem checks).
    • Impact: The sandbox execution engine cannot run natively on Windows or macOS hosts without containerization (WSL2, Docker, or PRoot).

  3. Timezone Discrepancy in Historical Logs:

    • Observation: Log entries in earlier versions (v0.1.7/v0.1.8) were recorded in local server time (UTC+2), whereas database records were stored in UTC.
    • Mitigation in v0.1.9: Unified all timestamps in logs, database records, and thought ledgers to standard UTC.

2. Current Unsupported Features

  • Multi-Language Payload Support: Project Hermit currently supports Python payload mutation only. C/C++, Rust, or JavaScript payload optimization is not implemented.
  • Remote Microservice MCP Payloads: The dynamic MCP payload currently operates via in-process module hot-reloading (importlib.reload). Distributed network payload mutation via gRPC / HTTP transport is not supported.
  • Unrestricted Host Self-Mutation: Modifying core host controller functions (IMMUTABLE_FUNCTIONS) is strictly forbidden to prevent system instability.