feat(confidence-engine): promote focused learning on done

docs/current-handoff.md

@@ -1651,3 +1651,38 @@ Refer to existing context documents before making architectural decisions:
 - `docs/current-working-principles.md` — axiomatic principles anchor.
 - `docs/Confidence_Engine_Return_to_Origin_Methodology_Context_2026-08-18.md` — RTO methodology.
 - `docs/methodology-checkpoint-return-to-origin.md` — repository-facing checkpoint summary.
+
+---
+
+## Canonical Playwright Investigation (v0.49 live run 2026-08-28)
+
+### Scenario:
+E-commerce checkout abandonment
+
+Situation text: "Our e-commerce checkout page has a high abandonment rate of 72%. Users report confusion about shipping costs appearing only at the final step."
+
+Mobile defects: overlapping buttons and tiny text fields.
+
+### Purpose:
+Longitudinal live UI verification for current Confidence Engine increments — specifically focused → global Finding handoff and Done-for-now promotion behavior.
+
+### Identity:
+E-commerce checkout abandonment scenario (72% rate + late shipping disclosure + mobile UX defects). Distinguished from the product-launch enterprise-customer scenario used in v0.48 experiments.
+
+### Canonical focused thread:
+"Relative contribution of delayed shipping cost disclosure versus mobile UI defects to the overall abandonment rate, as these are presented as distinct dimensions affecting user behavior"
+Target node: `n58lwnx`
+
+### Current minimum live state (post-run):
+- focusedContributions: 1
+- findings: 3 (all originatingTargetNodeId = n58lwnx, userDisposition = null)
+- promoted Current Understanding: YES (includes Evidence citation from eligible Findings)
+- Done-for-now promotion verified: YES
+
+### Live-test policy:
+- reuse this investigation for subsequent Playwright checks on this branch;
+- confirm scenario identity before every live run (inspect localStorage["confidence-engine-investigation"] + rendered Current Understanding);
+- do not silently continue against another scenario;
+- do not create a fresh scenario unless an experiment explicitly requires one;
+- if this investigation is absent, report TEST-STATE MISSING rather than diagnosing persistence failure;
+- structural/relative assertions only for LLM output — no exact prose dependency.