Repository Analysis

TheOdinProject/curriculum

The open curriculum for learning web development

3.1 Likely human-written View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of TheOdinProject/curriculum, a JavaScript project with 12,771 GitHub stars. SynthScan v2.0 examined 69,503 lines of code across 622 source files, recording 128 pattern matches distributed across 6 syntactic categories. The overall adjusted score of 3.1 places this repository in the Likely human-written band.

The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).

3.1
Adjusted Score
3.1
Raw Score
100%
Time Factor
2026-07-13
Last Push
12.8K
Stars
JavaScript
Language
69.5K
Lines of Code
622
Files
128
Pattern Hits
2026-07-14
Scan Date
0.00
HC Hit Rate

What These Metrics Mean

Adjusted Score
Primary synthetic code indicator. Raw score normalised per 1,000 lines of code and multiplied by the temporal discount factor. This is the definitive comparative metric — use it to rank repositories by AI authorship density.
Raw Score
The unmodified sum of all severity-weighted, context-multiplied pattern match scores before temporal discounting. Reflects the absolute signal strength independent of when the repository was last active.
Time Factor
The temporal discount multiplier (0–100%) applied to the raw score. Repositories last updated before ChatGPT's launch (Nov 2022) receive a 5% factor. Full signal is only assigned to repositories active in the post-adoption era (Jan 2024+).
Pattern Hits
Total count of individual pattern matches across all files and categories. A high hit count with a low score may indicate a very large codebase with isolated AI snippets; a low count with a high score indicates dense, concentrated AI signatures.
HC Hit Rate
High+Critical pattern hits per file, averaged across the repository. This orthogonal signal catches repositories where a few files are densely packed with high-severity AI tells — a strong indicator even when the normalised score appears moderate due to codebase size.
Lines of Code / Files
Total lines and files analysed. The scanner examines 94 file extensions. These denominators are used to normalise the score, enabling fair comparison between repositories of vastly different sizes.

Score History

This chart maps the temporal evolution of the adjusted synthetic code score across successive scan runs. An upward trajectory indicates ongoing incorporation of AI-generated code or expanding LLM-assisted scaffolding; a stable or declining trajectory may reflect active human refactoring, code removal, or the adoption of stricter authorship policies. The dashed secondary line (right axis) independently tracks total raw pattern hit count, which can diverge from the normalised score when codebase size changes significantly between scans.

Severity Breakdown

Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.

CRITICAL 0HIGH 1MEDIUM 2LOW 125

Directory Score Breakdown

This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.

Pattern Findings

The scanner identified 128 distinct pattern matches across 6 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.

Structural Annotation Overuse92 hits · 170 pts
SeverityFileLineSnippetContext
LOWadvanced_html_css/responsive_design/project_homepage.md13#### Step 1: Set up and planningCOMMENT
LOWadvanced_html_css/responsive_design/project_homepage.md18#### Step 2: Gather assetsCOMMENT
LOWadvanced_html_css/responsive_design/project_homepage.md25#### Step 3: Some tips!COMMENT
LOWadvanced_html_css/responsive_design/project_homepage.md32#### Step 4: Give your feedbackCOMMENT
LOWnodeJS/express/installation_guides/postgresql/linux.md3#### Step 1: Make sure the system is up to dateCOMMENT
LOWnodeJS/express/installation_guides/postgresql/linux.md11#### Step 2: Install the PostgreSQL packagesCOMMENT
LOWnodeJS/express/installation_guides/postgresql/linux.md29#### Step 3: Setting up PostgreSQLCOMMENT
LOWnodeJS/express/installation_guides/postgresql/macos.md3#### Step 1: Make sure the system is up to dateCOMMENT
LOWnodeJS/express/installation_guides/postgresql/macos.md14#### Step 2: Install PostgreSQL via PostgresAppCOMMENT
LOWarchive/installing_node.md14#### Step 0: PrerequisitesCOMMENT
LOWarchive/installing_node.md21#### Step 1: Downloading and Installing `nvm`COMMENT
LOWarchive/installing_node.md31#### Step 2: Initializing `nvm`COMMENT
LOWarchive/installing_node.md88#### Step 1: InstallationCOMMENT
LOWarchive/installing_node.md104#### Step 2: Setting the Node VersionCOMMENT
LOW…int/TOP004_lessonHeadings/tests/_guides/guide_valid.md5### Step 1: Download softwareCOMMENT
LOW…int/TOP004_lessonHeadings/tests/_guides/guide_valid.md13### Step 2: InstallCOMMENT
LOW…t/TOP004_lessonHeadings/tests/_guides/guide_invalid.md5### Step 1: DownloadCOMMENT
LOWfoundations/javascript_basics/loops_and_arrays.md56 // Step 1: If the element is an even numberCOMMENT
LOWfoundations/javascript_basics/loops_and_arrays.md58 // Step 2: Multiply this number by threeCOMMENT
LOWfoundations/javascript_basics/loops_and_arrays.md61 // Step 3: Add the new number to the totalCOMMENT
LOW…tions/javascript_basics/project_rock_paper_scissors.md27#### Step 1: Setup the project structureCOMMENT
LOW…tions/javascript_basics/project_rock_paper_scissors.md39#### Step 2: Write the logic to get the computer choiceCOMMENT
LOW…tions/javascript_basics/project_rock_paper_scissors.md49#### Step 3: Write the logic to get the human choiceCOMMENT
LOW…tions/javascript_basics/project_rock_paper_scissors.md59#### Step 4: Declare the players score variablesCOMMENT
LOW…tions/javascript_basics/project_rock_paper_scissors.md66#### Step 5: Write the logic to play a single roundCOMMENT
LOW…tions/javascript_basics/project_rock_paper_scissors.md89#### Step 6: Write the logic to play the entire gameCOMMENT
LOW…dations/javascript_basics/installation_guides/linux.md3#### Step 0: PrerequisitesCOMMENT
LOW…dations/javascript_basics/installation_guides/linux.md17#### Step 1: Downloading and installing nvmCOMMENT
LOW…dations/javascript_basics/installation_guides/linux.md25#### Step 2: Initializing nvmCOMMENT
LOW…installations/installation_guides/text_editors/wsl2.md3#### Step 1: Install VSCodeCOMMENT
LOW…installations/installation_guides/text_editors/wsl2.md7#### Step 2: Delete the installer fileCOMMENT
LOW…installations/installation_guides/text_editors/wsl2.md13#### Step 3: Install WSL ExtensionCOMMENT
LOW…installations/installation_guides/text_editors/wsl2.md19#### Step 4: Ensure that WSL2 can correctly open VSCodeCOMMENT
LOW…nstallations/installation_guides/text_editors/linux.md3#### Step 1: Download VSCodeCOMMENT
LOW…nstallations/installation_guides/text_editors/linux.md11#### Step 2: Install VSCodeCOMMENT
LOW…nstallations/installation_guides/text_editors/linux.md51#### Step 3: Delete the installer fileCOMMENT
LOW…nstallations/installation_guides/text_editors/linux.md59#### Step 4: Using VSCodeCOMMENT
LOW…nstallations/installation_guides/text_editors/macos.md3#### Step 1: Download VSCodeCOMMENT
LOW…nstallations/installation_guides/text_editors/macos.md7#### Step 2: Install VSCodeCOMMENT
LOW…nstallations/installation_guides/text_editors/macos.md13#### Step 3: Delete the installer fileCOMMENT
LOW…nstallations/installation_guides/text_editors/macos.md19#### Step 4: Using VSCodeCOMMENT
LOW…ations/installations/installation_guides/linux/wsl2.md15### Step 1: InstallationsCOMMENT
LOW…allations/installation_guides/linux/virtual_machine.md5### Step 1: Download VirtualBox and XubuntuCOMMENT
LOW…allations/installation_guides/linux/virtual_machine.md27### Step 2: Install VirtualBox and set up XubuntuCOMMENT
LOW…allations/installation_guides/linux/virtual_machine.md116### Step 3: Begin Xubuntu installationCOMMENT
LOW…allations/installation_guides/linux/virtual_machine.md192### Step 4: Updates and Guest AdditionsCOMMENT
LOW…allations/installation_guides/linux/virtual_machine.md272### Step 4: Understand your new VMCOMMENT
LOW…s/installations/installation_guides/linux/dual_boot.md5### Step 0: BitLockerCOMMENT
LOW…s/installations/installation_guides/linux/dual_boot.md15### Step 1: Download UbuntuCOMMENT
LOW…s/installations/installation_guides/linux/dual_boot.md19### Step 2: Create a bootable flash driveCOMMENT
LOW…s/installations/installation_guides/linux/dual_boot.md25### Step 3: Install UbuntuCOMMENT
LOW…tions/installations/installation_guides/chrome/wsl2.md5#### Step 1: Download Google ChromeCOMMENT
LOW…tions/installations/installation_guides/chrome/wsl2.md10#### Step 2: Install Google ChromeCOMMENT
LOW…tions/installations/installation_guides/chrome/wsl2.md15#### Step 3: Using Google ChromeCOMMENT
LOW…ions/installations/installation_guides/chrome/linux.md3#### Step 1: Download Google ChromeCOMMENT
LOW…ions/installations/installation_guides/chrome/linux.md20#### Step 2: Install Google ChromeCOMMENT
LOW…ions/installations/installation_guides/chrome/linux.md50#### Step 3: Delete the installer fileCOMMENT
LOW…ions/installations/installation_guides/chrome/linux.md56#### Step 4: Using Google ChromeCOMMENT
LOW…ions/installations/installation_guides/chrome/macos.md3#### Step 1: Download Google ChromeCOMMENT
LOW…ions/installations/installation_guides/chrome/macos.md8#### Step 2: Install Google ChromeCOMMENT
32 more matches not shown…
Fake / Example Data26 hits · 32 pts
SeverityFileLineSnippetContext
LOWnodeJS/express/forms_and_data_handling.md24 <input placeholder="John Doe" type="text" name="fullName" id="fullName">CODE
LOWdatabases/databases/databases_and_sql.md60INSERT INTO users (name, email) VALUES ('foobar', 'foo@bar.com');CODE
LOWdatabases/databases/databases_and_sql.md72 WHERE email='foo@bar.com';CODE
LOWarchive/html_css/project_design.md231. Add in some meaningless text to those divs (whether copied from the homepage or a [lorem ipsum generator](http://geneCODE
LOW…dations/html_css/html_foundations/working_with_text.md24 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod temporCODE
LOW…dations/html_css/html_foundations/working_with_text.md24 Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod temporCODE
LOW…dations/html_css/html_foundations/working_with_text.md2091. To get some practice working with text in HTML, create a plain blog article page which uses different headings, uses CODE
LOWruby_on_rails/forms_and_authentication/form_basics.md42 Parameters: {"utf8"=>"✓", "authenticity_token"=>"jJa87aK1OpXfjojryBk2Db6thv0K3bSZeYTuW8hF4Ns=", "email"=>"foo@bar.com"CODE
LOWruby_on_rails/forms_and_authentication/form_basics.md63Now another thing we talked about in the controller section was nesting data. You'll often want to tuck submitted data nCODE
LOWruby_on_rails/forms_and_authentication/form_basics.md78 Parameters: {"utf8"=>"✓", "authenticity_token"=>"jJa87aK1OpXfjojryBk2Db6thv0K3bSZeYTuW8hF4Ns=", "user"=>{"first_name"=CODE
LOWruby_on_rails/forms_and_authentication/project_forms.md58 Parameters: {"utf8"=>"✓", "authenticity_token"=>"jJa87aK1OpXfjojryBk2Db6thv0K3bSZeYTuW8hF4Ns=", "email"=>"foo@bar.comCODE
LOWruby_on_rails/forms_and_authentication/project_forms.md67 Parameters: {"authenticity_token"=>"WUaJBOpLhFo3Mt2vlEmPQ93zMv53sDk6WFzZ2YJJQ0M=", "username"=>"foobar", "email"=>"foCODE
LOWruby_on_rails/forms_and_authentication/project_forms.md94 Parameters: {"authenticity_token" => "WUaJBOpLhFo3Mt2vlEmPQ93zMv53sDk6WFzZ2YJJQ0M=", "user" =>{ "username" => "foobarCODE
LOW…vanced_forms_and_activerecord/active_record_queries.md35 [#<User id: 1, email: "foo@bar.com">]CODE
LOW…vanced_forms_and_activerecord/active_record_queries.md891. `User.where(email: "foo@bar.com")`CODE
LOW…vanced_forms_and_activerecord/active_record_queries.md901. `User.where("email" => "foo@bar.com")`CODE
LOW…vanced_forms_and_activerecord/active_record_queries.md911. `User.where("email = 'foo@bar.com'")`CODE
LOW…vanced_forms_and_activerecord/active_record_queries.md921. `User.where("email = ?", "foo@bar.com")`CODE
LOW…vanced_forms_and_activerecord/active_record_queries.md931. `User.where("users.email" => "foo@bar.com")`CODE
LOW…vanced_forms_and_activerecord/active_record_queries.md101The key thing to note is that `#find` returns the actual record while `#where` returns an `ActiveRecord::Relation` whichCODE
LOW…vanced_forms_and_activerecord/active_record_queries.md103`#find_by` is a really neat method that basically lets you build your own finder method. It's an alternative to using `#CODE
LOW…tml_css/intermediate_css_concepts/custom_properties.md87<p class="cool-paragraph">Lorem ipsum dolor sit amet.</p>CODE
LOW…tml_css/intermediate_css_concepts/custom_properties.md87<p class="cool-paragraph">Lorem ipsum dolor sit amet.</p>CODE
LOW…tml_css/intermediate_css_concepts/custom_properties.md89<p class="exciting-paragraph">Lorem ipsum dolor sit amet.</p>CODE
LOW…tml_css/intermediate_css_concepts/custom_properties.md89<p class="exciting-paragraph">Lorem ipsum dolor sit amet.</p>CODE
LOWruby/basic_ruby/methods.md179 "Jane Doe"CODE
AI Response Leakage1 hit · 5 pts
SeverityFileLineSnippetContext
HIGH…ails/advanced_forms_and_activerecord/forms_advanced.md122There are a couple new aspects to this process. With `#fields_for`, you basically create a form within a form (which shCODE
Hyper-Verbose Identifiers4 hits · 4 pts
SeverityFileLineSnippetContext
LOW…kdownlint/TOP012_headingLevels/TOP012_headingLevels.js26function getAssignmentPanelLineRange(lines) {CODE
LOW…_defaultSectionContent/TOP003_defaultSectionContent.js168function getAssignmentSectionErrors(sectionTokens) {CODE
LOW…P013_descriptiveHeadings/TOP013_descriptiveHeadings.js31function removeTrailingPunctuation(text) {CODE
LOWfoundations/javascript_basics/clean_code.md244function extractTextWithinBrackets(text) {CODE
Modern AI Meta-Vocabulary2 hits · 4 pts
SeverityFileLineSnippetContext
MEDIUMruby_on_rails/rails_sprinkles/turbo.md353- Check out this tutorial on [Turbo Frames and Turbo Stream](https://www.hotrails.dev/turbo-rails/turbo-frames-and-turboCODE
MEDIUMruby/testing_ruby_with_rspec/introduction_to_rspec.md196At this point, refactoring isn't necessary. The `#add` method is essentially a one line method. As you progress in your CODE
Over-Commented Block3 hits · 3 pts
SeverityFileLineSnippetContext
LOWruby_on_rails/rails_basics/routing.md141 # code to grab the proper Post so it can beCOMMENT
LOWruby/basic_ruby/nested_collections.md161 endCOMMENT
LOWruby/basic_ruby/nested_collections.md181teacher_mailboxes.flatten.each do |teacher|COMMENT