feat(narrative): assign Personality Style from scored Big Five

[cursor]

Why

After scoring, a buyer still cannot see a Personality Style. ADR-0018 already has the assignment key and deterministic fallback renderer on later main, but nothing assigns an original presentation style from already-scored Big Five observations. That leaves the consumer result incomplete and invites ad-hoc type labels.

What

• Add style_mapping_version_v1 in src/style_mapping.rs.
• Assign a primary style from the largest expressed Big Five pole.
• Keep a close second pole as adjacent instead of forcing a single category.
• Use style_balanced_profile when no dimension is expressed.
• Treat a dimension as unexpressed when |score| < 0.50 or, when a standard error is present, |score| < 1.96 * SE.
• Fail closed on unknown mapping version, invalid identity, missing/duplicate constructs, and unscored observations.
• Never write back into score observations.

Known-score fixtures cover every pole, mixed adjacent profiles, balanced profiles, uncertain high-SE scores, locale key change without style-ref change, and renderer handoff.

Architecture / scope

This is presentation mapping, not a psychometric kernel. It does not estimate traits, claim MBTI equivalence, persist style artifacts, or add HTTP. Citations are in ADR-0018 (APA 7th). TRACEABILITY records this as Active PR work, not protected-main truth.

This branch is stacked on #86 (authorize_anonymous_session plus the recovery claim_deadline_at fixture). #86 remains the landing vehicle for anonymous resource authorization. Command-auth honesty remains #135. Do not merge this as a substitute for those slices if a reviewer wants them isolated; the unique commit is feat(narrative): assign Personality Style from scored Big Five.

Verification

• cargo test --test style_mapping_assignment --test traceability_active_pr_contract --test documentation_architecture_contract
• cargo clippy --all-targets -- -D warnings
• cargo doc --no-deps

Independent non-author approval and required checks on the unchanged exact head remain merge gates. Never self-approve.

  

[cursor]

Unique buyer-facing mapping — do not merge the #86 stack with it

Head af8cb36 adds assign_personality_style for ADR-0018 style_mapping_version_v1. The mapping itself is presentation-only: pole dominance from already-scored Big Five observations, adjacent second pole within 0.25, style_balanced_profile when nothing is expressed, 95% SE gate, fail-closed unknown version / invalid identity / missing-duplicate-unscored constructs, no write-back into ScoreObservation.

Known-score fixtures cover every pole, mixed adjacent, balanced, high-SE suppression, locale key change without style-ref change, and renderer handoff. Style refs are original product labels, not MBTI types.

This branch is stacked on #86 (authorize_anonymous_session + recovery fixture). #86 remains the landing vehicle for anonymous resource authorization. Command-auth honesty remains #135. Do not merge #141 as a substitute for those slices.

Residuals acceptable on this slice: no persistence, no HTTP, no Korean copy in the mapping module (style refs are language-neutral; localized prose stays in the separately versioned renderer).

Independent last-push approval and exact-head required checks remain required. This review does not approve.

  

_{Sent by Cursor Automation: Fix Issues}

[cursor]

Landing vehicle for the first versioned Personality Style assignment. Keep this file isolated from the #86 anonymous-auth stack if a reviewer wants a single-concern merge. Do not add HTTP or persist style artifacts on this branch.

[seonghobae]

Closing this stale stacked vehicle because its unique Personality Style mapping slice has been isolated onto current-main reconciliation #314. #314 preserves the mapping contract without dragging #141's historical authorization/recovery ancestry; #86 and the other named lanes remain the owners of those unrelated slices. Do not transfer #141's checks or review evidence to #314.