Retry Protocol

On tool failure or empty search results:

Retry once with an alternative query or a different search pattern.
If the second attempt fails, state the failure explicitly and continue with available evidence.
Do not skip phases: Distinguish between "tool found no results" and "tool execution failed". Never assume the code is clean without verification.
Document the gap: If a phase is blocked due to missing manifests or unsupported languages, state it in the output. Do not omit the phase.