v0.3.0 limitations

v0.3.0 supports Python 3.10–3.14, Node.js/TypeScript, and Java/Spring on the verified DeepSeek Harness 0.1.1-rc.2 release train. Go and other ecosystems are deferred.

Python support covers common runtime tracebacks, imports, syntax errors, asyncio task failures, and pytest output. Native crashes, mypy, Ruff, Pyright, framework-specific server recovery, and arbitrary log formats are not included.

Node service recovery is not inferred automatically. Only the existing reliable Spring startup success rule performs automatic resolution.

Python recovery is not inferred automatically.

Ignore state applies only to the current Session, though it can be restored with the bounded Session snapshot.

Search operates on detected error cards, not complete logs.

Ordinary Bash, PowerShell, and terminal tool calls update only after tools/result; only loghud_run is incrementally monitored.

This is current Coding Session error state, not log search, APM, production monitoring, Kubernetes/container inspection, RAG, or Sentry replacement.

Generic rules may miss unusual logging formats or native crashes.

Automatic resolution is restricted to successful Spring startup markers in the same normalized command family. Other causal recovery is never guessed.

AI is manual only. There is no automatic analysis, autonomous fix, recent-change attribution, or new API-key setting.

Diagnosis needs the current Agent to expose a provider/model route and Harness to provide llm; failures affect only the diagnosis region.

Only bounded error context is retained. Ordinary logs are discarded.

In-memory state is authoritative. Without a compatible storageDomain, state is not retained across Host restarts.

Durable preferences require a writable local Harness Settings provider. Remote or read-only browsers show the effective settings without attempting unsupported writes.

shell.overlay preserves the native single-owner details panel, but its floating drawer may overlap narrow third-party overlays; the panel constrains itself to the viewport.

Harness is a developer preview; a later RC may require adaptation despite the same conceptual extension points.