A score you earn, and can defend.

Name: Skill Credibility Index (SCI)
Brand: Lemma
Availability: InStock

SCI isn't a number an algorithm invents about you. It's a transparent sum of five things you do: practice, proof, reliability, freshness, integrity. Every point traceable to the evidence behind it.

Skill Credibility Index

Live

0out of 100

Expert

JavaScript|6 points to Authority

Components

Practice

21/25

Sessions completed

Proof

34/40

Assessments & endorsements

Reliability

17/20

Show-up rate & consistency

Freshness

12/15

Last evidence 5 days ago

Integrity

Clean

No gaming detected

Tiers

Authority90-100

Expert75-89

Verified55-74

Proven35-54

Learner15-34

Newcomer0-14

Updated 2h ago

Event-sourced · Replayable

How it's calculated

Four signals. One score.

25pts

Peer sessions

0 pts

Completed sessions, partner ratings, and teaching quality contribute the largest share of your SCI score.

40pts

AI assessments

0 pts

Pass rates, difficulty levels, and consistency across assessments demonstrate verified competence.

20pts

External proofs

0 pts

Certificates, portfolio items, and third-party validations add independent credibility to your score.

15pts

Peer reviews

0 pts

Endorsements and feedback from learning partners provide social proof weighted by the endorser's own SCI.

Weighted total

0/ 100

Peer sessions0/25

AI assessments0/40

External proofs0/20

Peer reviews0/15

Tier system

Six tiers of credibility.

Authority

Expert

Verified

Proven

Learner

Newcomer

90-100

75-89

55-74

35-54

15-34

0-14

Authority

90-100

Sustained excellence across all evidence types. External proofs, top-tier assessments, and strong peer network.

Enterprise-visibleCertification-grade credential

Expert

75-89You

High pass rates on advanced assessments. Teaching sessions where you helped others learn effectively.

Featured in searchMentorship rolePremium matching

Verified

55-74

Passed AI assessments at intermediate level. Peer endorsements from verified partners confirm your ability.

Expert sessionsPriority matchingAnalytics dashboard

Proven

35-54

Multiple sessions with positive ratings. Consistent performance across different learning contexts.

Can teach othersVerified badgeGroup sessions

Learner

15-34

At least one completed session or assessment. Skill passport visible, entered the match pool.

Skill passport visibleEntered match pool

Newcomer

0-14

Basic profile, can book sessions as learner. The starting point for every skill you add to your passport.

Basic profileBook sessions as learner

Start proving what you know.

Early access is rolling out for individuals and teams. No credit card, no PDFs – just the things you made, made visible.