[
  {
    "field": "cpp_repos_recent_18mo",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "C++ repositories in 18 months — engine-internals signal"
  },
  {
    "field": "java_repos_recent_18mo",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Java repositories touched in the last 18 months"
  },
  {
    "field": "java_repos_recent_6mo",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Java repositories touched in the last 6 months — recency of practice"
  },
  {
    "field": "max_repo_stars",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Stars on the most popular repository the person contributed to"
  },
  {
    "field": "scala_repos_recent_18mo",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Scala repositories touched in the last 18 months"
  },
  {
    "field": "scala_repos_recent_6mo",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Scala repositories touched in the last 6 months"
  },
  {
    "field": "total_jvm_repos",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Total JVM repositories"
  },
  {
    "field": "total_stars",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Stars across all their repositories"
  },
  {
    "field": "profile_id",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "34.2%",
    "description": ""
  },
  {
    "field": "profile_match_method",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "34.2%",
    "description": "How the open-source identity was matched to the career profile — the provenance of the join"
  },
  {
    "field": "profile_url",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "34.2%",
    "description": ""
  },
  {
    "field": "profile_full_name",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "33.7%",
    "description": ""
  },
  {
    "field": "profile_headline",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "26.6%",
    "description": ""
  },
  {
    "field": "connections",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "extra",
    "group": "Identity & profile",
    "type": "dict",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "first_name",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "follower_count",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "full_name",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "is_incomplete",
    "group": "Identity & profile",
    "type": "bool",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "last_name",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "public_experience_available",
    "group": "Identity & profile",
    "type": "bool",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "public_identifier",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "updated_at",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "people_also_viewed",
    "group": "Identity & profile",
    "type": "list",
    "fill_rate": "18.3%",
    "description": ""
  },
  {
    "field": "education",
    "group": "Identity & profile",
    "type": "list",
    "fill_rate": "17.0%",
    "description": "Education history as structured records"
  },
  {
    "field": "headline",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "16.8%",
    "description": ""
  },
  {
    "field": "inferred_salary",
    "group": "Identity & profile",
    "type": "dict",
    "fill_rate": "15.4%",
    "description": "Modelled compensation range, where derivable"
  },
  {
    "field": "similarly_named_profiles",
    "group": "Identity & profile",
    "type": "list",
    "fill_rate": "14.0%",
    "description": ""
  },
  {
    "field": "summary",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "12.5%",
    "description": ""
  },
  {
    "field": "profile_connections",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "12.3%",
    "description": ""
  },
  {
    "field": "profile_num_followers",
    "group": "Identity & profile",
    "type": "int",
    "fill_rate": "11.2%",
    "description": ""
  },
  {
    "field": "birth_date",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "10.6%",
    "description": ""
  },
  {
    "field": "profile_summary",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "6.9%",
    "description": ""
  },
  {
    "field": "gender",
    "group": "Identity & profile",
    "type": "str",
    "fill_rate": "2.8%",
    "description": ""
  },
  {
    "field": "bio_shape_s_terms",
    "group": "Identity & profile",
    "type": "list",
    "fill_rate": "0.6%",
    "description": "Streaming terms found in the bio"
  },
  {
    "field": "bio_shape_q_terms",
    "group": "Identity & profile",
    "type": "list",
    "fill_rate": "0.3%",
    "description": "Query-engine terms found in the bio"
  },
  {
    "field": "background_cover_image_url",
    "group": "Identity & profile",
    "type": "null",
    "fill_rate": "0.0%",
    "description": ""
  },
  {
    "field": "profile_pic_url",
    "group": "Identity & profile",
    "type": "null",
    "fill_rate": "0.0%",
    "description": ""
  },
  {
    "field": "employer_category",
    "group": "Employment",
    "type": "str",
    "fill_rate": "100.0%",
    "description": "Employer bucket: competitor, big tech, startup, other"
  },
  {
    "field": "is_current_client",
    "group": "Employment",
    "type": "bool",
    "fill_rate": "100.0%",
    "description": "Currently employed by the client — dropped before scoring"
  },
  {
    "field": "past_client",
    "group": "Employment",
    "type": "bool",
    "fill_rate": "100.0%",
    "description": "Former client employee — kept and flagged, with a score penalty"
  },
  {
    "field": "title_seniority",
    "group": "Employment",
    "type": "str",
    "fill_rate": "100.0%",
    "description": "Normalized seniority from the job title"
  },
  {
    "field": "current_company_name",
    "group": "Employment",
    "type": "str",
    "fill_rate": "24.8%",
    "description": ""
  },
  {
    "field": "current_title",
    "group": "Employment",
    "type": "str",
    "fill_rate": "23.9%",
    "description": ""
  },
  {
    "field": "current_company_id",
    "group": "Employment",
    "type": "int",
    "fill_rate": "22.6%",
    "description": ""
  },
  {
    "field": "experiences",
    "group": "Employment",
    "type": "list",
    "fill_rate": "17.7%",
    "description": "Full career history as structured records"
  },
  {
    "field": "occupation",
    "group": "Employment",
    "type": "str",
    "fill_rate": "16.5%",
    "description": ""
  },
  {
    "field": "industry",
    "group": "Employment",
    "type": "str",
    "fill_rate": "15.7%",
    "description": ""
  },
  {
    "field": "location_city_match",
    "group": "Geography",
    "type": "str",
    "fill_rate": "100.0%",
    "description": "Which of the 21 normalized city patterns matched"
  },
  {
    "field": "location_tier",
    "group": "Geography",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "How strongly the location matches the target geography"
  },
  {
    "field": "profile_location_country",
    "group": "Geography",
    "type": "str",
    "fill_rate": "33.9%",
    "description": ""
  },
  {
    "field": "profile_location_name",
    "group": "Geography",
    "type": "str",
    "fill_rate": "33.7%",
    "description": ""
  },
  {
    "field": "country",
    "group": "Geography",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "country_full_name",
    "group": "Geography",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "location_str",
    "group": "Geography",
    "type": "str",
    "fill_rate": "18.7%",
    "description": ""
  },
  {
    "field": "state",
    "group": "Geography",
    "type": "str",
    "fill_rate": "17.9%",
    "description": ""
  },
  {
    "field": "city",
    "group": "Geography",
    "type": "str",
    "fill_rate": "14.2%",
    "description": ""
  },
  {
    "field": "apache_contributor",
    "group": "Open-source footprint",
    "type": "bool",
    "fill_rate": "100.0%",
    "description": "Whether the person has commits in Apache projects"
  },
  {
    "field": "github_created_at",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_followers",
    "group": "Open-source footprint",
    "type": "int",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_following",
    "group": "Open-source footprint",
    "type": "int",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_id",
    "group": "Open-source footprint",
    "type": "int",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_location",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_login",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_public_repos",
    "group": "Open-source footprint",
    "type": "int",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_score",
    "group": "Open-source footprint",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Score from open-source activity alone"
  },
  {
    "field": "github_updated_at",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_user_id",
    "group": "Open-source footprint",
    "type": "int",
    "fill_rate": "100.0%",
    "description": ""
  },
  {
    "field": "github_name",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "97.2%",
    "description": ""
  },
  {
    "field": "github_bio",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "59.2%",
    "description": ""
  },
  {
    "field": "github_score_breakdown",
    "group": "Open-source footprint",
    "type": "dict",
    "fill_rate": "53.5%",
    "description": "Per-component scoring detail — auditable, not a black box"
  },
  {
    "field": "github_blog",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "48.3%",
    "description": ""
  },
  {
    "field": "github_company",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "46.0%",
    "description": ""
  },
  {
    "field": "github_hireable",
    "group": "Open-source footprint",
    "type": "bool",
    "fill_rate": "24.4%",
    "description": ""
  },
  {
    "field": "github_twitter",
    "group": "Open-source footprint",
    "type": "str",
    "fill_rate": "18.3%",
    "description": ""
  },
  {
    "field": "apache_contributions",
    "group": "Open-source footprint",
    "type": "list",
    "fill_rate": "0.5%",
    "description": "Which Apache projects and how much"
  },
  {
    "field": "github_email",
    "group": "Open-source footprint",
    "type": "null",
    "fill_rate": "0.0%",
    "description": ""
  },
  {
    "field": "band",
    "group": "Scoring",
    "type": "str",
    "fill_rate": "100.0%",
    "description": "Delivery band A–D: A is the immediately actionable cut, D the reserve"
  },
  {
    "field": "combined_score",
    "group": "Scoring",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Final rank score combining open-source and career signals"
  },
  {
    "field": "headline_signal_count",
    "group": "Scoring",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "How many target signals appear in the headline"
  },
  {
    "field": "profile_score",
    "group": "Scoring",
    "type": "int",
    "fill_rate": "100.0%",
    "description": "Score from career history alone"
  },
  {
    "field": "shape",
    "group": "Scoring",
    "type": "str",
    "fill_rate": "100.0%",
    "description": "Which of the two engineer shapes the candidate matches — S (streaming) or Q (query engine)"
  },
  {
    "field": "tier",
    "group": "Scoring",
    "type": "str",
    "fill_rate": "100.0%",
    "description": "Evidence-strength tier within the band"
  },
  {
    "field": "profile_score_breakdown",
    "group": "Scoring",
    "type": "dict",
    "fill_rate": "27.4%",
    "description": "Per-component scoring detail for the career side"
  },
  {
    "field": "outreach_channels",
    "group": "Contactability",
    "type": "list",
    "fill_rate": "100.0%",
    "description": "Which channels are actually available for this person"
  },
  {
    "field": "combined_emails",
    "group": "Contactability",
    "type": "list",
    "fill_rate": "27.1%",
    "description": ""
  },
  {
    "field": "personal_emails",
    "group": "Contactability",
    "type": "list",
    "fill_rate": "14.4%",
    "description": ""
  },
  {
    "field": "combined_phones",
    "group": "Contactability",
    "type": "list",
    "fill_rate": "10.0%",
    "description": ""
  },
  {
    "field": "personal_numbers",
    "group": "Contactability",
    "type": "list",
    "fill_rate": "7.1%",
    "description": ""
  },
  {
    "field": "api_emails",
    "group": "Contact enrichment",
    "type": "list",
    "fill_rate": "20.6%",
    "description": ""
  },
  {
    "field": "api_phones",
    "group": "Contact enrichment",
    "type": "list",
    "fill_rate": "10.0%",
    "description": ""
  },
  {
    "field": "db_profile_created_at",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "34.2%",
    "description": ""
  },
  {
    "field": "db_profile_updated_at",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "34.2%",
    "description": ""
  },
  {
    "field": "db_profile_jobs_count",
    "group": "Database augmentation",
    "type": "int",
    "fill_rate": "33.5%",
    "description": ""
  },
  {
    "field": "db_profile_activity_at",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "28.9%",
    "description": ""
  },
  {
    "field": "db_company_follower_count",
    "group": "Database augmentation",
    "type": "int",
    "fill_rate": "27.1%",
    "description": ""
  },
  {
    "field": "db_company_size_code",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "26.9%",
    "description": ""
  },
  {
    "field": "db_company_type_code",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "26.9%",
    "description": ""
  },
  {
    "field": "db_company_description",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "26.8%",
    "description": ""
  },
  {
    "field": "db_company_website",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "26.6%",
    "description": ""
  },
  {
    "field": "db_personal_emails",
    "group": "Database augmentation",
    "type": "list",
    "fill_rate": "26.4%",
    "description": ""
  },
  {
    "field": "db_new_emails",
    "group": "Database augmentation",
    "type": "list",
    "fill_rate": "16.0%",
    "description": ""
  },
  {
    "field": "db_company_founded",
    "group": "Database augmentation",
    "type": "int",
    "fill_rate": "14.5%",
    "description": ""
  },
  {
    "field": "db_twitter_url",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "13.6%",
    "description": ""
  },
  {
    "field": "db_github_url",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "13.5%",
    "description": ""
  },
  {
    "field": "db_facebook_url",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "11.1%",
    "description": ""
  },
  {
    "field": "db_personal_numbers",
    "group": "Database augmentation",
    "type": "list",
    "fill_rate": "9.7%",
    "description": ""
  },
  {
    "field": "db_profile_skills",
    "group": "Database augmentation",
    "type": "list",
    "fill_rate": "3.6%",
    "description": ""
  },
  {
    "field": "db_salary_min",
    "group": "Database augmentation",
    "type": "int",
    "fill_rate": "3.5%",
    "description": ""
  },
  {
    "field": "db_salary_max",
    "group": "Database augmentation",
    "type": "int",
    "fill_rate": "3.3%",
    "description": ""
  },
  {
    "field": "db_new_phones",
    "group": "Database augmentation",
    "type": "list",
    "fill_rate": "2.6%",
    "description": ""
  },
  {
    "field": "db_gender",
    "group": "Database augmentation",
    "type": "str",
    "fill_rate": "1.6%",
    "description": ""
  },
  {
    "field": "db_profile_num_recommenders",
    "group": "Database augmentation",
    "type": "int",
    "fill_rate": "0.3%",
    "description": ""
  },
  {
    "field": "activities",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "14.9%",
    "description": ""
  },
  {
    "field": "skills",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "9.3%",
    "description": ""
  },
  {
    "field": "languages_and_proficiencies",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "8.9%",
    "description": ""
  },
  {
    "field": "accomplishment_projects",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "8.4%",
    "description": ""
  },
  {
    "field": "recommendations",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "8.3%",
    "description": ""
  },
  {
    "field": "languages",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "8.0%",
    "description": ""
  },
  {
    "field": "certifications",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "7.4%",
    "description": ""
  },
  {
    "field": "accomplishment_publications",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "5.5%",
    "description": ""
  },
  {
    "field": "accomplishment_honors_awards",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "4.0%",
    "description": ""
  },
  {
    "field": "volunteer_work",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "3.9%",
    "description": ""
  },
  {
    "field": "accomplishment_courses",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "3.1%",
    "description": ""
  },
  {
    "field": "accomplishment_patents",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "2.9%",
    "description": ""
  },
  {
    "field": "interests",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "2.6%",
    "description": ""
  },
  {
    "field": "accomplishment_organisations",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "2.3%",
    "description": ""
  },
  {
    "field": "articles",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "1.3%",
    "description": ""
  },
  {
    "field": "accomplishment_test_scores",
    "group": "Profile depth",
    "type": "list",
    "fill_rate": "0.8%",
    "description": ""
  },
  {
    "field": "groups",
    "group": "Profile depth",
    "type": "null",
    "fill_rate": "0.0%",
    "description": ""
  },
  {
    "field": "_enriched",
    "group": "Provenance",
    "type": "bool",
    "fill_rate": "100.0%",
    "description": "Whether contact enrichment ran for this record"
  },
  {
    "field": "_db_augmented",
    "group": "Provenance",
    "type": "bool",
    "fill_rate": "34.2%",
    "description": "Whether database augmentation ran"
  },
  {
    "field": "_response_time_ms",
    "group": "Provenance",
    "type": "int",
    "fill_rate": "18.7%",
    "description": "Enrichment latency — operational metric"
  },
  {
    "field": "_source",
    "group": "Provenance",
    "type": "str",
    "fill_rate": "18.7%",
    "description": "Where this record came from"
  }
]