# JavaScript Mastery (@javascriptmastery) on youtube

- id: koinon:creator:youtube_javascriptmastery
- url: https://koinonlink.com/kol/youtube/javascriptmastery
- schema_version: 1.4

## Identity
- platform: youtube
- handle: javascriptmastery
- platform_url: https://www.youtube.com/@javascriptmastery
- entity_type: creator
- person_id: Cross-platform identity not resolved for this creator.

## Reach
- followers: 1260000
- posts_observed: 3
- verified: false
- size_tier: kol

## Engagement
- status: not_collected
- status_note: Engagement has not been collected for this creator yet. This is a gap in our collection, NOT a statement that the creator has no engagement. Follower count is known, so it is measurable.
- unit_note: engagement_rate and peak_post_engagement_rate are ratios (0-1); avg_interactions_per_post and best_post_interactions are absolute counts. Read status before reading any number: a null rate has several different causes and status says which one applies here.

## Content
- category: software
- subcategory: devtools
- category_confidence: 0.95
- category_source: derived_from_recent_content
- topics: NestJS architecture and features, AI coding workflows and prompting techniques, Next.js vs TanStack comparisons, Developer best practices and AI agent setup, Conference recaps and career advice for developers
- bio: Master modern web development with a project-based approach.

## Audience (inferred)
- status: present
- description: Full-stack web developers and engineers focused on JavaScript/TypeScript, especially those building backends with NestJS and integrating AI coding tools
- roles: dev
- seniority: practitioner
- pain_points: Choosing and structuring NestJS projects correctly (services, controllers, folder structure), Making AI coding sessions reliable without constant refactors or broken UI, Writing effective prompts and maintaining context for AI agents, Deciding between overlapping tools like TanStack vs Next.js for real projects
- posts_analysed: 48
- confidence: 0.75

## Commercial (inferred)
- audience_buyer_fit: 0.8
- promotion_intent: 0.7
- open_to_collaboration: false
- contact: Koinon does not publish creator contact details.

## Quality signals
- authenticity_score: 58
- authenticity_basis: profile_shape_only
- credibility_score: 58
- flagged_for_review: false
- koinon_bd_grade: B — measures Koinon partner-outreach fit, not creator quality
- interpretation: Signals for triage, not verdicts. A flag means the profile is worth a manual check.

## Provenance
Every inferred field below carries how it was produced. Facts stay facts; inferences stay inferences.

- audience.description: source_type=ai_inferred, confidence=0.75, freshness_days=77, method=llm_persona_from_recent_content
- audience.roles: source_type=ai_inferred, confidence=0.75, freshness_days=77, method=llm_persona_from_recent_content
- audience.seniority: source_type=ai_inferred, confidence=0.75, freshness_days=77, method=llm_persona_from_recent_content
- commercial.audience_buyer_fit: source_type=ai_inferred, confidence=0.6, freshness_days=17, method=llm_scorer — Relative signal within Koinon indexing, not a market-wide score.
- commercial.promotion_intent: source_type=ai_inferred, confidence=0.6, freshness_days=17, method=llm_scorer
- quality.anomaly_flags: source_type=heuristic, confidence=0.5, freshness_days=52, method=profile_snapshot_and_engagement_ratio_heuristic — Means "worth a manual check", NOT confirmed fraud. Flags can be wrong and are not a verdict about the person.
- quality.authenticity_score: source_type=heuristic, confidence=0.25, freshness_days=17, method=Profile-shape heuristic from a single snapshot (follower count, following ratio, account age, posting volume, verification), reduced for engagement red flags where post engagement was collected. Where only a follower count is available the score saturates at 58. — The input set differs by platform; do not compare this score across platforms.
- quality.koinon_bd_grade: source_type=ai_inferred, confidence=0.5, freshness_days=52, method=llm_partner_fit_classifier + fit_score >= 0.6 AND authenticity >= 60 => A; fit_score >= 0.4 AND authenticity >= 45 => B; else C. authenticity < 30 or a promotional-pattern flag => quarantine. — Koinon partner-outreach fit, not creator quality.
- reach.followers: source_type=observed, confidence=0.95, freshness_days=52, method=platform_profile

## Freshness
- profile_checked_days_ago: 52
- content_analysed_days_ago: 17
- audience_updated_days_ago: 77

## AI retrieval
- indexing_requests: 10
- user_triggered_requests: 0
- note: Being indexed in bulk is not the same as being retrieved to answer a question.

## This profile
- Claim or correct: https://koinonlink.com/claim?k=youtube_javascriptmastery
- Request removal: https://koinonlink.com/claim?k=youtube_javascriptmastery
- Terms: https://koinonlink.com/for-ai