Code Snippets Library

Academic Tools

1

citation_parser.py

python

Accessibility

9

Accessible Theme Switcher Pattern

accessible_theme_switcher.js

Comprehensive theme switching implementation with accessibility features including screen reader announcements, keyboard navigation, localStorage pers...

javascript 3 deps 5 use cases

altflow_accessible_alt_text.py

python

Keyboard Navigation Patterns

keyboard_navigation_pattern.js

Comprehensive patterns for implementing keyboard navigation, including smooth scrolling with offset, focus management, and WCAG-compliant keyboard int...

javascript 2 deps 7 use cases

link_remediation_pattern.py

python

Non-Invasive FocusTrap via MutationObserver

mutation-observer-focus-trap.js

Attaches a focus trap to a panel/drawer whose open/close state is controlled by a third-party script (or any code you don't want to modify). The Mutat...

javascript

Screen Reader Announcement Patterns

screen_reader_announcements.js

Comprehensive patterns for dynamically announcing content changes to screen readers using ARIA live regions. Essential for accessible SPAs and dynamic...

javascript 2 deps 7 use cases

Skip Links and Landmark Navigation Pattern

skip_links_and_landmarks.html

Comprehensive pattern for implementing skip navigation links and proper HTML5 landmark regions for keyboard and screen reader accessibility.

html 3 deps 6 use cases

Single-Button Theme Cycle Pattern

theme-cycle-single-button.js

Cycles through N themes with one button instead of one button per theme. The button's aria-label always tells screen readers both the current state an...

javascript

url_validation_pattern.py

python

Admin Patterns

5

================================================

admin-dashboard.html

html

express-bearer-admin-router.ts

typescript

health-check-pattern.py

python

hybrid-process-management.py

python

service-registry-pattern.py

python

Agent Orchestration

8

agent_lifecycle_management.py

python

hierarchical_agent_coordination.py

python

multi_agent_data_models.py

python

parallel_agent_execution.py

python

phased_workflow_orchestrator.py

python

provider_abstraction_pattern.py

python

task_decomposition_pattern.py

python

task_tool_dispatch_pattern.py

python

Api Clients

27

Data Fetching Patterns Guide

DATA_FETCHING_PATTERNS_GUIDE.md

markdown

api-gateway-llm-wrapper.ts

typescript

arxiv_client.py

python

base_provider_pattern.py

python

batch-profile-enrichment-atproto.ts

typescript

bbc_news_client.py

python

bluesky-client-to-server-auth-sync.ts

typescript

cost_optimized_model_selection.py

python

hybrid_free_api_provider.py

python

jina_web_scraper.py

python

lazy_loading_provider_factory.py

python

location_services_client.py

python

manus-task-api-client.py

python

multi-provider-llm-client.js

javascript

multi_provider_abstraction.py

python

noaa-arcgis-rest-api.py

python

openfoodfacts-api-pagination.py

python

openstreetmap-overpass-api.py

python

paleobiology-database-api.py

python

provider_adapter_pattern.py

python

ssrf_protected_og_scraper.ts

typescript

third-party-session-sync-client.ts

typescript

trpc_blob_upload_bluesky.ts

typescript

unesco-xml-api-parser.py

python

wikipedia_client.py

python

wolfram_alpha_client.py

python

xai_vision_api_integration.py

python

Async Patterns

10

async_context_managers.py

python

async_llm_operations.py

python

asyncio_background_thread.py

python

cancelled-flag-useeffect-cleanup.ts

typescript

flask_asyncio_background_thread.py

python

parallel_task_execution.py

python

sse-streaming-client.js

javascript

task_cancellation_timeout.py

python

threadpool_concurrent_execution.py

python

useref-stale-closure-cleanup.ts

typescript

Bipolar Dashboard

3

Multi-Source Data Generator Orchestration

multi-source-data-generator-orchestration.md

markdown

Realistic Content Generation Helpers

realistic-content-generation-helpers.md

markdown

Sine Wave Mood Cycle Pattern

sine-wave-mood-cycle-pattern.md

markdown

By Category

4

Bluesky / AT Protocol Patterns

bluesky-patterns.md

markdown

Document Processing Snippets

document-processing.md

markdown

Git Index Repair Patterns

git-index-repair.md

markdown

Repository Maintenance Patterns

repository-maintenance.md

markdown

By Domain

1

Accessibility Planning Patterns

accessibility-planning-patterns.md

markdown

By Pattern

4

Flask Input Validation Pattern

flask-input-validation.md

markdown

Snippet: Public Repo Cleanup Workflow

public-repo-cleanup-workflow.md

markdown

Swiss Design Timeline Component

swiss-design-timeline.md

markdown

Vanilla JavaScript State Management Pattern

vanilla-js-state-management.md

markdown

By Project

1

Snippet: Public Release Gitignore — FastAPI + SvelteKit Project

blueballs-public-release-gitignore.md

markdown

Cli Tools

10

Bash ANSI Cursor Animation Skeleton

bash-ansi-cursor-animation-skeleton.md

markdown

Bash ANSI Modular Effect Library

bash-ansi-modular-effect-library.md

markdown

Bash: Cron + cURL API Automation

bash-cron-api-automation.md

markdown

Snippet: Formatted Terminal Output with Colors and Boxes

bash-formatted-output.md

markdown

Bash: Multi-Platform Skill Sync

bash-multi-platform-skill-sync.md

markdown

Bash: Publish Each Entry from a JSON Manifest

bash-publish-from-json-manifest.md

markdown

Bash Terminal Coordinate Geometry

bash-terminal-coordinate-geometry.md

markdown

Snippet: CLI Output Parsing from Noisy Sources

cli-output-parsing.md

markdown

interactive_cli_with_llm.py

python

Snippet: Parallel CLI Execution

parallel-cli-execution.md

markdown

Configuration

1

vite-strict-port-caddy-proxy.js

javascript

Configuration Management

1

multi_source_config.py

python

Controls

1

Reset Button Pattern for Visualizations

reset-button-pattern.md

markdown

Data Pipelines

2

multi-strategy-geocoding.py

python

world-bank-api-refresh.py

python

Data Processing

10

auto-metadata-generation.py

python

Casual Data Annotations Pattern

casual-data-annotations.md

markdown

data_aggregation_pipeline_patterns.py

python

data_sanitization_patterns.py

python

dataset-quality-validation.py

python

format_conversion_patterns.py

python

json_narrative_parser.py

python

json_validation_patterns.py

python

llm-json-parse-with-regex-fallback.ts

typescript

pydantic_validation_patterns.py

python

Data Visualization

16

Canvas Migration Pattern for Large Point Datasets

canvas-migration-pattern.md

markdown

Chart.js Responsive Dashboard Patterns with Theme Support

chart-js-responsive-dashboards.js

Complete patterns for creating interactive, themeable dashboards using Chart.js. Includes bar charts, radar charts, bubble charts, and theme switching...

javascript 2 deps 5 use cases

Chronological Visualization Date Assignment Pattern

chronological-visualization-date-assignment.md

markdown

D3.js Force-Directed Network Visualization with Mobile Support

d3-force-network-visualization.js

Complete pattern for creating interactive force-directed graphs showing relationships between entities. Includes mobile touch handling, filtering, too...

javascript 2 deps 5 use cases

D3.js Geographic Point Sampling Patterns

d3-geographic-point-sampling.md

markdown

D3.js Radial Tree Pattern

d3-radial-tree-pattern.md

markdown

D3.js Sankey Flow Diagram Pattern

d3-sankey-flow-pattern.md

markdown

Data Transformation and Utility Functions for Visualizations

data-transformation-utils.js

Comprehensive collection of utility functions for data loading, parsing, formatting, filtering, and state management in data visualization projects. P...

javascript 1 deps 6 use cases

Pattern: Date-Based Radial Positioning for Tree Nodes

date-based-positioning.md

markdown

leaflet-choropleth-map.js

javascript

Pattern: Radial Constraint with Clamped Offsets

radial-constraint-pattern.md

markdown

Radial Force Constraint Tuning Pattern

radial-force-constraint-tuning.md

markdown

Snippet: README Generation for Data Visualizations

readme-generation-datavis.md

markdown

SVG Performance Sampling Pattern

svg-performance-sampling.md

markdown

Interactive Timeline Animation with Projection Capability

timeline-animation-interactive.js

Complete pattern for creating animated timelines showing historical progression with future projections. Includes playback controls, speed adjustment,...

javascript 3 deps 5 use cases

Viewport Culling Pattern for Map Visualizations

viewport-culling-pattern.md

markdown

Database Patterns

4

dexie-indexeddb-typed-crud.ts

typescript

SQLite WAL Mode Performance Configuration

sqlite-wal-performance.md

markdown

sqlite_flask_simple_pattern.py

python

sqlite_threading_safe.py

python

Datavis

5

Aurora Hover Sync Pattern

aurora-hover-sync.md

markdown

Branch Color Mapping for Tree Visualizations

branch-color-mapping.md

markdown

Geocoding Cache Pattern for Data Pipelines

geocoding-cache-pattern.md

markdown

Social Card Meta Tags Pattern

social-card-meta-tags.md

markdown

Time Markers Overlay Pattern

time-markers-overlay.md

markdown

Deduplication

1

file_deduplication.py

python

Design Systems

7

Snippet: Collapsible Details Pattern (Pure HTML/CSS)

collapsible-details-pattern.md

markdown

Dashboard Variant Design Patterns

dashboard-variant-patterns-2026-02-14.md

markdown

Filing Cabinet Interface Pattern

filing-cabinet-interface.md

markdown

Glassmorphism CSS Design Pattern

glassmorphism-css-pattern.md

markdown

mobile-first-responsive-controls.md

markdown

Snippet: Sidebar UX Restructure Pattern

sidebar-ux-restructure.md

markdown

Typewriter Animation Pattern

typewriter-animation.md

markdown

Error Handling

1

graceful_import_fallbacks.py

python

File Operations

8

base64-datauri-download.js

javascript

client-side-file-size-validation.js

javascript

comprehensive_document_parser.py

python

config_file_loading.py

python

Directory Cleanup Patterns

directory-cleanup-patterns.md

markdown

module_discovery.py

python

path_handling_utils.py

python

yaml_frontmatter_markdown_parser.py

python

Html

2

Snippet: Lazy Symbol Loader with IntersectionObserver + MutationObserver

lazy-symbol-loader-intersection-observer.md

markdown

Subresource Integrity (SRI) for CDN Scripts

sri-hash-cdn-security.html

html

Langgraph Patterns

1

react_agent_pattern.py

python

Mobile Capacitor

2

capacitor-platform-detection.ts

typescript

capacitor-plugin-bridge.ts

typescript

Patterns

5

Code Snippets - 2026-01-05 Checkpoint

2026-01-05-checkpoint.md

markdown

FastAPI CORS Security Pattern

fastapi-cors-security.md

markdown

FastAPI User Feedback System Pattern

fastapi-user-feedback-system.md

markdown

Groupchat Patterns — Harvested 2026-03-06

groupchat-patterns-2026-03-06.md

markdown

Python Specific Exception Handling Pattern

python-specific-exception-handling.md

markdown

Process Management

1

service-manager-pattern.py

python

Publishing

6

Snippet: Awesome-List PR Submission Workflow

awesome-list-pr-workflow.md

markdown

Snippet: Bulk GitHub Repository Creation

bulk-github-repo-creation.md

markdown

Snippet: Bulk GitHub Repo Humanize + README Audit

bulk-repo-humanize-audit.md

markdown

Multi-Platform Dataset Publishing

multi-platform-dataset-publishing.md

markdown

Snippet: Multi-Repo Skill Rename Convention

multi-repo-skill-rename-convention.md

markdown

New Public Repo Checklist

new-public-repo-checklist.md

markdown

Python Test Patterns

2

Pattern: HTTP Client Test Fixtures with Realistic Mock Payloads

http-client-mock-conftest.md

markdown

Pattern: Mocking LLM Provider SDK Imports in pytest

llm-provider-mock-pattern.md

markdown

Real Time Dashboards

4

chartjs_socketio_integration.html

html

dashboard_state_management.py

python

flask_socketio_broadcaster.py

python

socketio_emit_from_background.py

python

Security

5

api-key-env-scrub.py

python

sri-cdn-security.md

markdown

HTML Sanitization Function - XSS Prevention

xss-prevention-escapehtml.js

javascript

xss-prevention-tooltip.md

markdown

xss-safe-dom-construction.js

javascript

Sentiment Analysis

1

vader_sentiment_analyzer.py

python

Social Media Clients

3

at-protocol-uri-construction.ts

typescript

at_protocol_facet_computation.ts

typescript

bluesky_at_protocol_client.py

python

Spatial Algorithms

2

hex-grid-smart-spawn.ts

typescript

inter-cluster-proximity-lines.ts

typescript

Streaming Patterns

2

flask_sse_blueprint_ollama_provider.py

python

sse_streaming_responses.py

python

Testing

1

pytest_fixtures_patterns.py

python

Tool Registration

2

mcp_stdio_server_pattern.py

python

swarm_module_pattern.py

python

Trpc

2

jwt-cookie-context.ts

typescript

procedure-tiers.ts

typescript

Typescript Package Exports

1

SNIPPET: Handling Major Version Dependency Upgrades

dependency-major-version-upgrade.md

markdown

Ui Patterns

1

Responsive Horizontal Controls Pattern

responsive-horizontal-controls.md

markdown

Utilities

18

ascii-language-detection.ts

typescript

base-class-pattern.py

python

blob-url-lifecycle.js

javascript

cache_manager_redis_fallback.py

python

crypto_utilities.py

python

datetime_utilities.py

python

embedding_generation_similarity.py

python

env_config_utilities.py

python

ES6 Module Lazy Loading Pattern

es6-lazy-loading-pattern.md

markdown

flask_image_handling.py

python

logging_utilities.py

python

rate_limiter.py

python

redis_cache_manager.py

python

retry_decorator.py

python

scan-dir-build-platform-manifests.py

python

string_utilities.py

python

timezone_and_duration_utilities.py

python

TypeScript: JSON File State Persistence

typescript-json-state-persistence.md

markdown

Vision Patterns

2

Snippet: Three.js Tooltip Guard Clause

threejs-tooltip-guard-clause.md

markdown

vision_client.py

python

Web Frameworks

15

Audio/Video Feature Quick Start Guide

AUDIO_VIDEO_QUICK_START.md

markdown

flask-sse-endpoint.py

python

flask_audio_file_handler.py

python

flask_authentication_decorators.py

python

flask_blueprint_organization.py

python

flask_blueprint_with_url_prefix.py

python

flask_factory_pattern_with_blueprints.py

python

flask_middleware_patterns.py

python

flask_multi_provider_api_proxy.py

python

flask_multipart_file_upload.py

python

flask_socketio_setup.py

python

flask_video_generation_handler.py

python

Gunicorn + Eventlet Deployment Guide for Flask-SocketIO

gunicorn_socketio_deployment.md

markdown

gunicorn_socketio_deployment.py

python

Loading States and Error Handling Pattern for API Calls

javascript_loading_states_pattern.js

Robust pattern for managing loading states, error handling, and success feedback in frontend applications.

javascript 1 deps 4 use cases

Websocket Patterns

3

react-ws-collab-hook.ts

typescript

websocket_client_with_reconnect.py

python

websocket_firehose_reconnection.py

python