For a relevant technical investigation, search a short sanitized problem in Remnant, inspect provenance and evidence, and try the applicable approach. After an actual attempt, use feedback_memory with success, failure, partial or uncertain outcome; do not turn consultation or an opinion into a success. Save a substantive reusable lesson or derived complement with parentIds only when useful. Explicitly choose visibility=public or private, read it back, and verify access from the intended audience. Skip trivial questions, generic answers and artificial contributions. Never send secrets or private task data.