Code Snippets Library

Academic Tools

Academic Citation Parser

citation_parser.py

Multi-style citation extractor supporting APA, MLA, Chicago, Harvard, and IEEE formats with BibTeX generation capability. Extracts both in-text citati...

python 1 deps 5 use cases

Google Scholar Search Scraper

google_scholar_scraper.py

Query Google Scholar via plain HTTP + HTML parsing (no official API) and extract structured metadata for the top result(s): title, authors, venue, yea...

python

Accessibility

a11y-pnw-isolates-fixes.tsx

typescript

Accessibility Planning Patterns

accessibility-planning-patterns.md

markdown

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 Pattern: Accessible Alt Text Generation

altflow_accessible_alt_text.py

Professional-grade alt text generation following WCAG accessibility standards. Based on the AltFlow Coze agent pattern. Generates strict, accessible a...

python 3 deps 5 use cases

Accessible Form Pattern with Validation

form-with-validation.html

html

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 and Fixing Pattern

link_remediation_pattern.py

Automated pattern for fixing broken links, applying redirects, and updating URLs in HTML and Markdown content. Useful for maintaining large documentat...

python 3 deps 5 use cases

modal-focus-trap-aria-overlay.js

javascript

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

numeric-shortcut-guard-typing-target.js

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

Comprehensive URL Validation Pattern

url_validation_pattern.py

Robust pattern for validating, testing, and enriching URLs in web applications, particularly useful for accessibility audits, link checkers, and conte...

python 6 deps 5 use cases

Hex Picker Accessibility Pattern (WordBlocks)

wordblocks-hex-picker-a11y-pattern.md

markdown

Admin Patterns

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

admin-dashboard.html

html

express-bearer-admin-router.ts

typescript

Health Check + Monitor Pattern

health-check-pattern.py

python

Hybrid Process Management — subprocess + systemd

hybrid-process-management.py

python

Service Registry Pattern — Single Source of Truth

service-registry-pattern.py

python

Agent Orchestration

Agent Lifecycle Management Pattern

agent_lifecycle_management.py

Comprehensive pattern for managing agent lifecycle from initialization through execution to cleanup. Includes state tracking, validation, cost estimat...

python 4 deps 5 use cases

Citation-aware document generation (PDF + DOCX from agent reports)

citation_aware_document_generation.md

markdown

CitationMonitor: live URL verification across agent outputs

citation_monitor_url_verification.md

markdown

Conditional Orchestrator Pattern

conditional_orchestrator.py

Selects one of many workflow branches at runtime based on a contextual condition value (or a pluggable evaluator callable), then runs the chosen branc...

python

Hierarchical Agent Coordination Pattern

hierarchical_agent_coordination.py

Three-tier hierarchical agent architecture for coordinating multi-agent swarms with parallel execution, synthesis layers, and executive consolidation....

python 4 deps 5 use cases

Hierarchical Drummer/Camina synthesis (three-tier rollup)

hierarchical_drummer_camina_synthesis.md

markdown

Multi-Agent Orchestration Data Models

multi_agent_data_models.py

Structured data classes for multi-agent workflows. Provides type-safe containers for tasks, agent results, synthesis operations, and streaming events....

python 4 deps 6 use cases

Multi-platform bot architecture: shared core + platform adapters.

multi_platform_bot_adapter.py

python

Orchestrator Configuration Dataclasses

orchestrator_config.py

Layered dataclass config for multi-agent orchestrator workflows. A base OrchestratorConfig holds options common to every orchestrator (agent count, co...

python

Parallel Agent Orchestration Pattern

parallel-orchestration-pattern.md

markdown

Parallel Agent Execution with Rate Limiting

parallel_agent_execution.py

Pattern for executing multiple async agents in parallel with semaphore-based rate limiting, timeout handling, and retry logic. Ensures controlled conc...

python 3 deps 5 use cases

phased_workflow_orchestrator.py

python

Multi-Provider Abstraction for Agent Communication

provider_abstraction_pattern.py

Abstract base class pattern for unified LLM provider interface in multi-agent systems. Enables agents to work with any LLM provider (OpenAI, Anthropic...

python 5 deps 5 use cases

Task Decomposition Pattern for Multi-Agent Systems

task_decomposition_pattern.py

Pattern for breaking down complex tasks into specific, actionable subtasks that can be executed independently by specialized agents. Uses LLM-based de...

python 4 deps 5 use cases

task_tool_dispatch_pattern.py

python

Api Clients

Data Fetching Patterns Guide

DATA_FETCHING_PATTERNS_GUIDE.md

markdown

api-gateway-llm-wrapper.ts

typescript

ArXiv API Client

arxiv_client.py

Client for searching and retrieving academic papers from arXiv.org with dataclass-based paper representation and multiple search methods.

python 1 deps 6 use cases

Abstract Base Provider Pattern for API Clients

base_provider_pattern.py

Reusable abstract base class pattern for implementing multi-provider API integrations with consistent interfaces. Supports streaming responses, base64...

python 3 deps 5 use cases

batch-profile-enrichment-atproto.ts

typescript

BBC News RSS Client

bbc_news_client.py

Client for fetching news articles from BBC News RSS feeds with support for multiple categories and full article content extraction.

python 2 deps 5 use cases

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

typescript

Claude Code Provider (Hybrid Free/Paid LLM Provider)

claude_code_provider.py

A provider that uses Claude Code's own Claude instance when running inside Claude Code (no API key, no per-call cost), and transparently falls back to...

python

Cost-Optimized Model Selection by Query Complexity

cost_optimized_model_selection.py

Intelligent model selection based on query complexity analysis. Routes simple queries to smaller/cheaper models and complex queries to flagship models...

python 2 deps 5 use cases

Daily USD spend kill-switch for an LLM proxy

daily-usd-spend-killswitch.md

markdown

Alpha Vantage Finance API Client

finance_client.py

python

GitHub API Client

github_client.py

python

Hybrid Free/API Provider Pattern

hybrid_free_api_provider.py

Automatically detect execution environment and use free service when available (e.g., Claude Code's built-in instance), fall back to paid API when run...

python 3 deps 5 use cases

Jina Reader Web Scraper

jina_web_scraper.py

Web scraping client using Jina Reader API (r.jina.ai) to extract clean, markdown-formatted text content from web pages. Useful for LLM processing as i...

python 1 deps 5 use cases

Lazy-Loading Provider Factory with Singleton Pattern

lazy_loading_provider_factory.py

Factory for LLM providers with lazy initialization and caching. Avoids importing unused providers, reduces memory footprint, and enables graceful hand...

python 2 deps 5 use cases

LLM Call with Cache + Offline Fallback (WordBlocks)

llm-cache-with-fallback-pattern.md

markdown

LLM tactic-cycling retry for content-filter recovery

llm-tactic-cycling-retry.md

markdown

LLM provider parameter-rejection retry (temperature, etc.).

llm_temperature_rejection_retry.py

python 6 use cases

Location Services Client (MapQuest, WalkScore, Air Quality)

location_services_client.py

Unified client for location-based APIs including geocoding (MapQuest), walkability scores (WalkScore), and air quality data (WAQI).

python 1 deps 5 use cases

MyAnimeList API Client

mal_client.py

python

Manus Task API Client — Custom Header Auth + Async Poll Pattern

manus-task-api-client.py

Client for the Manus LLM API, which uses a task-based (async/poll) model rather than a synchronous completion endpoint. Notable auth pattern: uses a b...

python 2 deps 3 use cases

multi-provider-llm-client.js

javascript

Multi-Provider API Abstraction Pattern

multi_provider_abstraction.py

A robust pattern for creating provider abstractions that support multiple AI/API services through a unified interface. This pattern uses inheritance a...

python 4 deps 5 use cases

NASA API Client

nasa_client.py

python

News API Client

news_client.py

python

noaa-arcgis-rest-api.py

python

Open-Meteo browser client — keyless forecast + UV + air quality

open-meteo-browser-client.md

markdown

openfoodfacts-api-pagination.py

python

OpenLibrary API Client

openlibrary_client.py

python

openstreetmap-overpass-api.py

python

paleobiology-database-api.py

python

Unified LLM Provider Ping Tool

ping_providers.py

python

Multi-Provider Fallback on Recoverable Errors

provider-fallback-on-recoverable-error.md

markdown

Provider Adapter Pattern for Shared Libraries

provider_adapter_pattern.py

Adapter pattern for wrapping shared library implementations with application-specific methods. Maintains conversation history, adds convenience method...

python 2 deps 4 use cases

Runware API Reference (cross-project)

runware-api-reference.md

markdown

ssrf_protected_og_scraper.ts

typescript

third-party-session-sync-client.ts

typescript

Token-gated provider federation with graceful degradation

token-gated-provider-federation.md

markdown

trpc_blob_upload_bluesky.ts

typescript

unesco-xml-api-parser.py

python

NOAA Weather API Client

weather_client.py

python

Multi-Provider Web Search Tool

web_search_tool.py

A single tool wrapper that searches the web via SerpAPI, Tavily, or Brave, auto-selecting whichever provider has an API key configured. Exposes an Ope...

python

Wikipedia API Client

wikipedia_client.py

Client for Wikipedia's API supporting article search, summaries, full content retrieval, and random articles across multiple languages.

python 1 deps 6 use cases

Wolfram Alpha Computational Knowledge Engine Client

wolfram_alpha_client.py

Client for querying Wolfram Alpha's computational knowledge engine with support for multiple response formats (plaintext, image, MathML) and both JSON...

python 1 deps 4 use cases

Wolfram Alpha API Client

wolfram_client.py

python

xAI Grok Vision API Integration Pattern

xai_vision_api_integration.py

Complete pattern for integrating xAI's Grok Vision API for image/video analysis with thorough error handling, base64 encoding, and video frame extract...

python 3 deps 6 use cases

YouTube Data API Client

youtube_client.py

python

Async Patterns

Async/Sync Adapter Utilities

async_adapter.py

python

Async Context Managers Pattern

async_context_managers.py

Comprehensive patterns for implementing async context managers (__aenter__/__aexit__) for resource management in async code. Includes patterns for API...

python 3 deps 6 use cases

Async LLM Operations Pattern

async_llm_operations.py

Patterns for handling asynchronous LLM operations including concurrent requests, streaming, rate limiting, and error recovery.

python 4 deps 5 use cases

Serialize lazy creation of a shared resource under async fan-out.

asyncio-singleton-lock.py

python

Background Asyncio Event Loop in Threading

asyncio_background_thread.py

Pattern for running asyncio coroutines in background threads alongside Flask/synchronous applications. This is essential for integrating async WebSock...

python 2 deps 4 use cases

Background Event Loop Manager

background_loop.py

python

cancelled-flag-useeffect-cleanup.ts

typescript

Flask + Asyncio Background Thread Integration

flask_asyncio_background_thread.py

Pattern for running asyncio event loops in background threads alongside Flask applications. Enables async tasks (WebSocket clients, async APIs) to run...

python 3 deps 5 use cases

IframePostMessageBridge — promise-based request/response envelope over postMessage.

iframe-postmessage-bridge-with-timeouts.js

javascript

LLM prepass → overlap downstream gens with full payload

llm-prepass-then-full-overlap.md

markdown

multi-lane-priority-queue-with-abort.js

javascript

Parallel coding agents with a consensus safety gate

parallel-coding-agents-with-consensus-gate.md

markdown

Parallel Task Execution Pattern

parallel_task_execution.py

Pattern for executing multiple async tasks concurrently with proper error handling, progress tracking, and result aggregation. Demonstrates how to orc...

python 4 deps 5 use cases

pendingRef: Pass Context Across an Async Cascade Without Threading

pending-ref-across-async-cascade.md

markdown

speculative-prefetch-depth-n-tree.js

javascript

sse-streaming-client.js

javascript

Task Cancellation and Timeout Patterns

task_cancellation_timeout.py

Comprehensive patterns for handling async task cancellation, timeouts, graceful shutdown, and cleanup. Includes patterns for cancelling individual tas...

python 3 deps 6 use cases

Task Cancellation and Timeout Utilities

task_management.py

python

ThreadPoolExecutor Concurrent Execution Pattern

threadpool_concurrent_execution.py

Production-ready pattern for executing multiple tasks concurrently using ThreadPoolExecutor with proper error handling, callback systems, and result a...

python 3 deps 6 use cases

useref-for-high-frequency-event-tracking.ts

typescript

useref-stale-closure-cleanup.ts

typescript

Bipolar Dashboard

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

Cli Tools

Data Distribution Analyzer for Scale Selection

analyze-distribution.py

python

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

Color Palette Generator for Data Visualization

color-palette.py

python

cross-platform-date-arithmetic.sh

bash

D3.js Visualization Project Scaffolder

d3-scaffold.py

python

arXiv Paper Fetcher

fetch-arxiv.py

python

Git Index Repair Patterns

git-index-repair.md

markdown

Interactive CLI with LLM Integration Pattern

interactive_cli_with_llm.py

Comprehensive pattern for building interactive CLI chat interfaces that integrate with LLM APIs. Supports streaming responses, conversation history, t...

python 5 deps 5 use cases

Multi-Repo Bash Sweep with GitHub Visibility Filter

multi-repo-sweep-public-only.md

markdown

Snippet: Parallel CLI Execution

parallel-cli-execution.md

markdown

Repository Maintenance Patterns

repository-maintenance.md

markdown

Configuration Management

asset-manifest-parity-check.sh

bash

Cross-host git-repo parity when one host can't reach the remote

cross-host-git-repo-parity.md

markdown

Cross-runtime precedence ladder (JS + Python must agree)

cross-runtime-precedence-ladder.md

markdown

Dead-letter field detection (storage → wire → renderer)

dead-letter-field-detection.md

markdown

Bump the localStorage key version to unpin a changed default

localstorage-key-version-bump-to-unpin-defaults.md

markdown

Multi-host config sync preserving per-host secrets

multi_host_config_sync.md

markdown

Multi-Source Configuration Pattern

multi_source_config.py

Comprehensive pattern for loading configuration from multiple sources with proper precedence handling. Supports environment variables, config files, C...

python 6 deps 5 use cases

Run a service from its source repo, not a deployed copy

run-service-from-repo-not-a-copy.md

markdown

SPA auth strategy: which pattern fits

spa-auth-strategy-decision-tree.md

markdown

Version-control an /etc config dir and prune its backup pile

version-control-etc-config-and-prune-backups.md

markdown

vite-strict-port-caddy-proxy.js

javascript

Controls

Reset Button Pattern for Visualizations

reset-button-pattern.md

markdown

Css

Adopt a design system on a legacy page by aliasing its existing CSS vars

design-system-adoption-via-var-aliasing.md

markdown

mobile-responsive-patterns.css

css

OKLCH with #hex Fallback (Browser Graceful Degradation)

oklch-with-hex-fallback.md

markdown

Strip dead CSS rules by selector (brace-matched, assertion-guarded)

strip-dead-css-rules-by-selector.md

markdown

Tabs: active-indicator + divider hairline overlap

tab-active-indicator-hairline-overlap.md

markdown

Terminal-green theme (the `dr.eamer.dev/clocks` ASCII look)

terminal-green-theme.md

markdown

Theme variants via body class — single shared CSS, multiple palettes

theme-variants-via-body-class.md

markdown

Data Pipelines

Caddy JSON Access Logs to NCSA Combined Log Format

caddy_to_combined.py

Streams Caddy's structured JSON access logs (stdin) and emits NCSA Combined Log Format lines (stdout) suitable for importing into analytics tools like...

python

Multi-Strategy Geocoding with Graceful Degradation

multi-strategy-geocoding.py

python

Notion-export Markdown → HTML (python-markdown)

notion-markdown-to-html.md

markdown

Single-seam canonical → prototype adapter

single-seam-canonical-prototype-adapter.md

markdown

timestamp_based_one_way_sync.sh

bash

World Bank API Data Refresh Pattern

world-bank-api-refresh.py

python

Data Processing

auto-metadata-generation.py

python

Canonical Key Reconciliation Shim

canonical_key_reconciliation.py

python 3 use cases

Casual Data Annotations Pattern

casual-data-annotations.md

markdown

Data Aggregation and Pipeline Transformation Patterns

data_aggregation_pipeline_patterns.py

Comprehensive patterns for building data processing pipelines including aggregation, grouping, filtering, and multi-stage transformations. Implements ...

python 4 deps 6 use cases

Data Sanitization and Cleaning Patterns

data_sanitization_patterns.py

Comprehensive patterns for sanitizing, cleaning, and normalizing data from various sources including user input, API responses, and file uploads. Incl...

python 5 deps 6 use cases

dataset-quality-validation.py

python

Document Processing Snippets

document-processing.md

markdown

Multi-Format Data Conversion Patterns

format_conversion_patterns.py

Comprehensive patterns for converting data between JSON, YAML, TOML, XML, and CSV formats with proper error handling and validation.

python 7 deps 5 use cases

JSON Narrative Story Format Parser

json_narrative_parser.py

Parse and convert JSON-based interactive narrative formats (similar to Twine and Ink) into runtime-ready data structures for game engines or...

python 3 deps 5 use cases

JSON Validation, Analysis, and Manipulation Patterns

json_validation_patterns.py

Comprehensive patterns for JSON validation, statistical analysis, key extraction, and manipulation without external dependencies (uses only stdlib).

python 3 deps 6 use cases

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

typescript

Polars-native dataset profiling with memory caps.

polars-dataset-profiling-at-scale.py

python

Pydantic Data Validation and Schema Patterns

pydantic_validation_patterns.py

Comprehensive patterns for data validation, transformation, and schema generation using Pydantic. Includes input validation, output serialization, and...

python 3 deps 6 use cases

Rolling History Summary from Flat Event Log

rolling-history-summary-from-event-log.md

markdown

Sibling-DB Pattern for Heavy SQLite Loads

sibling_db_heavy_load_sqlite.py

When one SQLite file serves live traffic and a separate dataset needs to be ingested (millions of rows, multi-minute load), write the new dataset into...

python 1 deps 4 use cases

Synthetic Data Generator Pattern

synthetic-data-generator-pattern.md

markdown

Text processing utilities for cleaning, chunking, and summarising content.

text_processing.py

python

Data Visualization

Aurora Hover Sync Pattern

aurora-hover-sync.md

markdown

Branch Color Mapping for Tree Visualizations

branch-color-mapping.md

markdown

Canvas Migration Pattern for Large Point Datasets

canvas-migration-pattern.md

markdown

Canvas2D neon-peg glow renderer

canvas2d-neon-peg-glow.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

Pyvis Flask App: Standard Structure

flask-app-structure.md

markdown

Geocoding Cache Pattern for Data Pipelines

geocoding-cache-pattern.md

markdown

leaflet-choropleth-map.js

javascript

Non-Linear Time Axis + Wide-Range Magnitude Encoding

nonlinear-time-axis-and-magnitude-encoding.md

markdown

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

French Republican decimal time + equinox-true calendar (JS)

republican-decimal-time-and-calendar.md

markdown

Social Card Generator (Pillow)

social-card-generator-pil.md

markdown

Social Card Meta Tags Pattern

social-card-meta-tags.md

markdown

SVG Performance Sampling Pattern

svg-performance-sampling.md

markdown

Three.js readPixels → ASCII pipeline

threejs-readpixels-to-ascii.md

markdown

Time Markers Overlay Pattern

time-markers-overlay.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

Drift-free UTC clock tick loop (with a11y minute-gating)

utc-clock-tick-loop.md

markdown

Viewport Culling Pattern for Map Visualizations

viewport-culling-pattern.md

markdown

Database Patterns

dexie-indexeddb-typed-crud.ts

typescript

indexeddb-eviction-sentinel.ts

typescript

The NULL-distinct UNIQUE-index footgun (and the deterministic-key fix)

null-distinct-unique-index-dedupe.md

markdown

SQLite Batch Insert Pattern with Progress Tracking

sqlite-batch-insert.py

python

sqlite-online-backup-rotation.sh

bash

SQLite WAL Mode Performance Configuration

sqlite-wal-performance.md

markdown

SQLite Simple Connection Pattern for Flask Apps

sqlite_flask_simple_pattern.py

Straightforward SQLite integration for Flask applications that don't require connection pooling. Uses simple connection-per-operation pattern with pro...

python 2 deps 5 use cases

Thread-Safe SQLite Database Operations

sqlite_threading_safe.py

Pattern for using SQLite safely in multi-threaded applications (Flask, SocketIO, etc.). Avoids "database is locked" errors and ensures proper connecti...

python 2 deps 4 use cases

Deduplication

File Deduplication Framework

file_deduplication.py

Comprehensive file deduplication system supporting general files, images, and text files with content similarity detection and optional merging.

python 1 deps 5 use cases

Perceptual-hash deduplication against an existing corpus, in pure Pillow.

pillow_ahash_dedup.py

python

Design Systems

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

Typed exception hierarchy for LLM providers.

exceptions.py

python

Graceful Import Fallbacks Pattern

graceful_import_fallbacks.py

Robust pattern for handling optional dependencies and providing graceful degradation when imports fail. Enables modules to work in both full-featured ...

python 4 deps 5 use cases

Retry helpers for synchronous and asynchronous callables.

retry_logic.py

python

File Operations

base64-datauri-download.js

javascript

client-side-file-size-validation.js

javascript

Comprehensive Document Parser with Graceful Fallbacks

comprehensive_document_parser.py

Production-ready parser for 50+ file formats with comprehensive error handling, optional dependency fallbacks, and metadata extraction. Supports docum...

python 2 deps 15 use cases

Multi-Format Configuration File Loading

config_file_loading.py

Load configuration from multiple file formats (JSON, YAML, .env) with type conversion and graceful error handling. Supports hierarchical loading from ...

python 5 deps 4 use cases

Directory Cleanup Patterns

directory-cleanup-patterns.md

markdown

Dynamic Module Discovery and Loading

module_discovery.py

Discover and load Python modules dynamically from directories. Includes pattern-based discovery, safe module loading with error handling, and filterin...

python 5 deps 5 use cases

Batch Image Optimizer for Web Performance

optimize_images.py

Walk a directory, find oversized raster images, and shrink them by resizing to a max width and re-encoding. PNGs above a hard threshold are converted ...

python

Path Handling Utilities with pathlib

path_handling_utils.py

Modern path manipulation utilities using pathlib.Path for cross-platform compatibility. Includes path resolution, validation, creation, and common ope...

python 3 deps 5 use cases

WLP Format Parser Pattern

wlp-format-parser.py

python

yaml_frontmatter_markdown_parser.py

python

Geepers Chat Demo

Bottom-Anchored Peek Notification

bottom-peek-pill.md

markdown

Cross-Surface Pin Sync (Hex Tile → Magic Panel)

cross-surface-pin-sync.md

markdown

Smart Hex Expansion (Open-Slot Aware)

smart-hex-expansion.md

markdown

Js Test Patterns

Blob round-trip through fake-indexeddb in Vitest/jsdom (the {} gotcha)

fake-indexeddb-blob-roundtrip-vitest.md

markdown

Langgraph Patterns

LangGraph ReAct Agent Pattern

react_agent_pattern.py

Complete implementation pattern for a ReAct (Reasoning and Acting) agent using LangGraph with configurable LLM, tool binding, and conditional routing.

python 3 deps 5 use cases

Llm Patterns

Ollama Safeguard — Policy-Based Content Moderation with Local Ollama + Gradio

app-ollama-safeguard.py

A local, dependency-light clone of a policy-driven safeguard model (in the spirit of openai/gpt-oss-safeguard). Instead of downloading a large model a...

python

Model lifecycle registry: the one place that knows which model IDs are

model_lifecycle.py

python

Rolling continuity "state bible" for long LLM conversations

rolling-continuity-state-bible.md

markdown

Mobile Capacitor

capacitor-platform-detection.ts

typescript

capacitor-plugin-bridge.ts

typescript

Patterns

144

Code Snippets: React Configuration Patterns

2025-12-15-react-config-patterns.md

markdown

Reusable Patterns - 2026-01-05 Checkpoint

2026-01-05-checkpoint-patterns.md

markdown

Code Snippets - 2026-01-05 Checkpoint

2026-01-05-checkpoint.md

markdown

App Store archive → upload gotchas (beast, 2026)

app-store-archive-upload-gotchas.md

markdown

Async upstream → local artifact with poll endpoint

async-upstream-to-local-artifact-with-poll.md

markdown

Autosave preserves architecture neutrality during an in-flight council

autosave-preserves-architecture-neutrality.md

markdown

Bearer token in URL hash — shared-secret auth without a login screen

bearer-token-in-url-hash.md

markdown

Pattern: Flask Monolith to Blueprint Extraction

blueprint-extraction-pattern.md

markdown

Build-and-hold: animate a deterministic render by time-slicing its own compute

build-and-hold-deterministic-animation.md

markdown

Build stamp in /health: detecting stale installed PWAs

build-stamp-stale-pwa-reload.md

markdown

Cache-Buster Mismatch Trap (CSS bumped, JS not)

cache-buster-mismatch-trap.md

markdown

Cache + listeners + write-through localStorage — remote pulls trigger React re-renders

cache-listener-write-through.md

markdown

Caddy on_demand TLS permission (Caddy 2.7+)

caddy-on-demand-tls-permission.md

markdown

Merge Canonical + LLM Choices: Dedup by Label, Cap, Distinct Behavior

canonical-vs-llm-choice-merge.md

markdown

Canvas hit-testing via inverse geometry + in-context legend

canvas-lens-probe-and-legend.md

markdown

Pattern: Canonical Capability Registry

capability-registry-pattern.md

markdown

Capacitor 8 → iOS shipping recipe (Vite web app)

capacitor-ios-shipping-recipe.md

markdown

Pattern: Compaction with Re-Attachment

compaction-reattachment-pattern.md

markdown

Composite graph keys when same surface form appears in multiple languages

composite-graph-keys-for-same-spelled-nodes.md

markdown

Consensus-of-Four: adversarial review process

consensus-of-four-adversarial-review.md

markdown

Content Safety Classifier — SSE Buffer Split + Verdict Extraction Pattern

content-safety-classifier-sse-pattern.md

markdown

Context Pill + editingTarget: visible LLM scope bias

context-pill-and-editing-target-for-llm-scope.md

markdown

Server-wide credential-leak sweep

credential-leak-server-sweep.md

markdown

Cross-platform shell gotchas when diffing/syncing over SSH

cross-platform-shell-gotchas-ssh-sync.md

markdown

Cross-repo contract drift gate (copy + checksum manifest + sibling test)

cross-repo-contract-drift-gate.md

markdown

Cynic's binding dissent overriding external consensus

cynic-binding-dissent-over-external-consensus.md

markdown

Data-attribute theme cycle with CSS custom properties

data-attribute-theme-cycle.md

markdown

Dataset divergence composite score

dataset-divergence-composite-score.md

markdown

Date-seeded "X of the day" picker.

date-seeded-word-of-day.js

javascript

Debounced server sync with local-storage fallback

debounced-server-sync-with-local-fallback.md

markdown

Declarative Tray API with `[data-tray-section]` Buttons

declarative-tray-with-data-attribute-buttons.md

markdown

Default-off opt-in flip with localStorage backward-compat

default-off-opt-in-localstorage-flip.md

markdown

Degenerate-result rejection at the backend boundary.

degenerate-result-rejection.py

python

Design-spec "pixel-perfect" clause admits two readings

design-spec-pixel-perfect-clause-two-readings.md

markdown

Diff-acknowledgment prompt rule for LLM-driven branching narratives

diff-acknowledgment-prompt-rule.md

markdown

Dual time-zone display: render the same instant in two zones

dual-timezone-display-via-intl.md

markdown

Pattern: Durable System Prompt Instructions

durable-system-prompt-instructions.md

markdown

Pattern: Execution Spine Event Model

execution-spine-event-model.md

markdown

Pattern: Fail-Closed Shell Command Analysis

fail-closed-shell-command-analysis.md

markdown

Fail-open LLM pipeline with errors-as-data

fail-open-insight-pipeline.md

markdown

FastAPI CORS Security Pattern

fastapi-cors-security.md

markdown

FastAPI User Feedback System Pattern

fastapi-user-feedback-system.md

markdown

Fastlane: metadata-only uploads + device-prefix screenshot staging

fastlane-deliver-screenshot-staging.md

markdown

Tiny in-process job runner for Flask

flask-inmemory-job-runner.md

markdown

Flask Input Validation Pattern

flask-input-validation.md

markdown

Prefix-aware Flask under Caddy `handle_path`

flask-reverse-proxy-script-name.md

markdown

Font scale accessibility control

font-scale-a11y-control.md

markdown

`@functools.cache` singleton factory

functools-cache-singleton.md

markdown

git-filter-repo-key-scrub.md

markdown

Pattern: Git Log as Structured Status Feed

git-log-structured-status-feed.md

markdown

GitHub 100 MB-per-file limit: when binary assets exceed it

github-100mb-binary-asset-strategy.md

markdown

Global Default + Per-Entity Metadata Override

global-default-with-per-entity-metadata-override.md

markdown

GoatCounter Snippet Injection

goatcounter-snippet-injection.md

markdown

Groupchat Patterns — Harvested 2026-03-06

groupchat-patterns-2026-03-06.md

markdown

Headless Chrome FPS A/B measurement (and the idle-throttle trap)

headless-chrome-fps-ab-measurement.md

markdown

HuggingFace `load_dataset` with streaming fallback

hf-dataset-load-with-streaming-fallback.md

markdown

Pattern: Hook Lifecycle Infrastructure

hook-lifecycle-infrastructure.md

markdown

htm + ESM single-file React app (no build step)

htm-esm-single-file-react.md

markdown

IIFE-wrap classic `<script>` "modules" to avoid top-level const collisions

iife-wrap-classic-script-modules.md

markdown

Interactive seeded to-do list with check, edit, hide, reset, add

interactive-seeded-todo-with-overrides.md

markdown

iOS PWA: Composing safe-area-inset Into Bottom-Anchored Chrome

ios-pwa-safe-area-composition.md

markdown

Leaflet custom "locate me" control

leaflet-custom-locate-control.md

markdown

Snippets: linguistic-api Phase 1 Consolidation

linguistic-api-phase1-consolidation.md

markdown

LLM-backed structured-edit engine with deterministic fallback

llm-backed-structured-edit-engine-with-fallback.md

markdown

Hard timeout on a (possibly hung) LLM call, with deterministic fallback — Flask/WSGI

llm-call-hard-timeout-with-fallback.md

markdown

LLM-emitted condition name guard (fail-open on phantoms)

llm-condition-name-guard-fail-open.md

markdown

LLM Content Guardrails Pattern

llm-content-guardrails.md

markdown

LLM gateway: module-level semaphore + 429 exp-backoff

llm-gateway-concurrency-and-retry.md

markdown

LLM Tool Calling Loop Pattern

llm-tool-calling-loop.md

markdown

Pattern: Memory with Path-Scoped Rules

memory-path-scoped-rules.md

markdown

Merge ranked lists from N sources, dedup, sort by priority + score

merge-ranked-sources-with-priority.md

markdown

Pattern: Multi-Source Drift Detection

multi-source-drift-detection.md

markdown

Pattern: Named-Array → Lookup Map Helper

named-array-lookup-helper.md

markdown

@Observable settings with UserDefaults write-through (no Combine)

observable-userdefaults-settings.md

markdown

Ollama "local" sentinel for keyless BYOK

ollama-local-sentinel-byok.md

markdown

Open-mode trusted-pair: dropping auth when the URL is the access boundary

open-mode-no-auth-trusted-pair.md

markdown

Package Independence Test

package-independence-test.md

markdown

Pattern: Parallel-Scaffold Blueprint Migration

parallel-scaffold-blueprint-migration.md

markdown

Partial-column-coverage surface-form fallback with per-row match_mode

partial-column-coverage-matchmode-fallback.md

markdown

Patch-id subset check for branch safety

patch-id-subset-check-for-branch-safety.md

markdown

Per-theme WCAG contrast locked in by unit tests

per-theme-wcag-contrast-test.md

markdown

Per-Turn Rule Prepend: surviving long-system-prompt drift

per-turn-rule-prepend-for-llm-drift.md

markdown

Snippet: Periodic Repo Hygiene Sweep

periodic-repo-hygiene.md

markdown

Raspberry Pi touchscreen kiosk on labwc/Wayland (systemd + Chromium)

pi-labwc-chromium-kiosk.md

markdown

Pillow Dynamic Card Renderer Pattern

pillow-dynamic-card-renderer.md

markdown

Pillow PNG-thumb → JPEG sweep, bomb-safe

pillow-thumb-sweep-png-to-jpeg.md

markdown

Pattern: Plugin Enablement Precedence

plugin-enablement-precedence.md

markdown

Minimalist Data Poem: authoring pattern

poem-authoring.md

markdown

pre-commit-untracked-secret-audit.md

markdown

Pattern: Prompt Boundary Splitting

prompt-boundary-pattern.md

markdown

Prose-Diff Above the JSON: making an op-based contract readable

prose-diff-for-op-proposals.md

markdown

Pattern: Provider Gateway Normalization

provider-gateway-normalization.md

markdown

Provider-Spec table collapse for multi-provider HTTP APIs

provider-spec-table-collapse.md

markdown

Snippet: Public Repo Cleanup Workflow

public-repo-cleanup-workflow.md

markdown

PWA Icon Generator: SVG → Raster PNGs With Maskable Variants

pwa-icon-generator-from-svg.md

markdown

PWA Rich Android Install Dialog Requirements

pwa-rich-android-install-dialog.md

markdown

PWA → iOS via xcodegen + WKWebView (bundled assets)

pwa-to-ios-bundled-wkwebview.md

markdown

PWA → iOS phone UX checklist

pwa-to-ios-phone-ux-checklist.md

markdown

Pattern: Reconstruct `.py` Source from `.pyc` Bytecode

pyc-to-py-source-reconstruction.md

markdown

Python Specific Exception Handling Pattern

python-specific-exception-handling.md

markdown

Pattern: Recovery from Context Overflow and Failures

recovery-patterns-context-overflow.md

markdown

Redacted LLM error hints in UI

redacted-llm-error-hint.md

markdown

Migrate CDN-hosted thumbnails to local without re-downloading

regenerate-thumbnails-from-existing-fulls.md

markdown

Pattern: Registry-Driven Artifact Generation

registry-artifact-generators.md

markdown

Pattern: Remote Tool Caching

remote-tool-caching.md

markdown

Schema-Driven Form Renderer with Target Descriptors

schema-driven-form-renderer.md

markdown

Scrub-not-reimport when derived data has drifted from source-of-truth

scrub-not-reimport-when-derived-data-drifted.md

markdown

Self-healing LLM authoring pipeline

self-healing-llm-authoring-pipeline.md

markdown

Shell-adapter monkey-patch-render pattern

shell-adapter-monkey-patch-render.md

markdown

Sidecar markdown notes

sidecar-markdown-notes.md

markdown

Single-file canonical nav for static + Flask multi-page sites

single-file-canonical-nav.md

markdown

Single-user server-JSON persistence

single-user-server-json-persistence.md

markdown

Pattern: Skills as Executable Specs

skills-as-executable-specs.md

markdown

SSH probe via stdin-fed bash

ssh-stdin-fed-bash-probe.md

markdown

SSH tar-pipe through a relay host

ssh-tar-pipe-through-relay.md

markdown

Detecting Stale CLAUDE.md After Rebuild / Swap Commits

stale-claudemd-after-rebuild-commits.md

markdown

Stale-serve for caches keyed on a fast-rotating revision

stale-serve-rev-keyed-cache.md

markdown

Pattern: Streaming Tool Execution

streaming-tool-execution.md

markdown

Bidirectional subpath-prefix helper for Caddy-mounted services

subpath-prefix-bidirectional.md

markdown

Generative-app core: value types, shareable seeds, off-main render

swift-generative-core-value-types.md

markdown

SwiftUI offscreen snapshot for visual QA of a Canvas view

swiftui-offscreen-face-snapshot.md

markdown

Swiss Design Timeline Component

swiss-design-timeline.md

markdown

Text-Length-Scaled Auto-Advance

text-length-scaled-auto-advance.md

markdown

Text-rolodex attribution pattern

text-rolodex-attribution.md

markdown

Thorny-first rebase conflict ordering

thorny-first-rebase-conflict-ordering.md

markdown

Three-runtime parity contract (Python ↔ JS ↔ Swift)

three-runtime-parity-contract.md

markdown

Three-theme CSS with legacy alias compatibility shim

three-theme-css-with-legacy-aliases.md

markdown

Gerstner waves that stay stable when the water plane follows the camera

threejs-gerstner-follow-cam.md

markdown

Three.js scene-depth pre-pass (packed RGBA8)

threejs-scene-depth-prepass.md

markdown

Tolerant JSON extraction from LLM output

tolerant-llm-json-extraction.md

markdown

Pattern: Topocentric Overlay on a Heliocentric Scene

topocentric-overlay-on-heliocentric-scene.md

markdown

Tree-Merge Cycle Guard

tree-merge-cycle-guard.md

markdown

Pattern: URL-Driven Entry Mode for SPAs

url-driven-entry-mode.md

markdown

useOverrides + InlineEdit — editable-blocks pattern over seeded data

use-overrides-edit-hook.md

markdown

Vanilla bottom sheet with breakpoint reparenting (no duplicate DOM)

vanilla-bottom-sheet-breakpoint-reparent.md

markdown

Vanilla JavaScript State Management Pattern

vanilla-js-state-management.md

markdown

`visibilitychange` → sync on tab focus

visibilitychange-sync-on-tab-focus.md

markdown

Vite + Caddy + wouter — SPA at a non-root sub-path

vite-caddy-subpath-spa-with-wouter-base.md

markdown

Installable PWA served at a subpath (vite-plugin-pwa + Caddy handle_path)

vite-plugin-pwa-installable-at-subpath.md

markdown

Vite PWA: precache `public/` static assets for true offline + the config-shadowing footgun

vite-pwa-offline-static-assets.md

markdown

Brace-balanced wikitext template tokenizer

wikitext-brace-balanced-tokenizer.md

markdown

WKWebView native shell: the hardening delegates

wkwebview-native-shell-delegates.md

markdown

XCUITest screenshot automation for WKWebView apps

xcuitest-webview-screenshot-automation.md

markdown

Process Management

cron-auto-disable-pattern.sh

bash

Disk Space Monitor

disk_monitor.py

Monitors overall disk usage plus a configurable set of high-growth files/directories, logs warnings/criticals when thresholds are exceeded, and persis...

python

port-evicting-start-script.sh

bash

Process Management System for Multiple Python Services

service-manager-pattern.py

Comprehensive service manager for starting, stopping, monitoring, and auto-restarting Python/Flask services. Includes health checking, log management,...

python 2 deps 4 use cases

Publishing

Audit a published package for vendored / secret leaks

audit-published-package-for-vendored-leaks.md

markdown

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

HuggingFace Dataset README Generator

generate_hf_readme.py

Generates a HuggingFace-compatible README.md (with YAML frontmatter) for a dataset directory from existing Kaggle-style `dataset-metadata.json`. Use i...

python

Markdown Document Generation

markdown_generator.py

python

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

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

Per-test SQLite isolation for a module-global DB manager (pytest)

pytest-per-test-sqlite-isolation.md

markdown

Pytest Fixtures and Testing Patterns

pytest_fixtures_patterns.py

Comprehensive patterns for writing effective pytest tests including fixtures, mocking, parametrization, and test organization strategies.

python 4 deps 6 use cases

Real Time Dashboards

chartjs_socketio_integration.html

html

Real-Time Dashboard State Management

dashboard_state_management.py

Pattern for managing dashboard state with thread-safe counters, buffers, and statistics tracking. Optimized for real-time data streams with deque-base...

python 2 deps 5 use cases

Flask-SocketIO Real-Time Broadcasting Pattern

flask_socketio_broadcaster.py

Flask application with SocketIO for real-time bidirectional communication. Demonstrates server-to-client broadcasting, client connection handling, and...

python 4 deps 5 use cases

SocketIO Emission from Background Threads

socketio_emit_from_background.py

Pattern for emitting SocketIO events from background asyncio tasks or threads to update real-time dashboards. Critical for separating data processing ...

python 2 deps 5 use cases

Security

API Key Environment Scrub Pattern

api-key-env-scrub.py

Replace hardcoded API keys in Python source files with os.environ.get() lookups. Includes a bulk-scrub utility for auditing a project directory and an...

python 1 deps 3 use cases

Authentication helpers for Flask blueprints.

auth.py

python

Snippet: Public Release Gitignore — FastAPI + SvelteKit Project

blueballs-public-release-gitignore.md

markdown

Caddy `respond 404` regex: blocking server-side files inside a public web root

caddy-respond-404-regex-file-blocking.md

markdown

Lightweight cryptographic helpers (hashing, HMAC, optional symmetric encryption).

crypto.py

python

Pattern: Fail-Closed Shell Command Analysis

fail-closed-shell-analysis.md

markdown

Fail-Closed Shell Command Classifier

shell_analyzer.py

python 3 use cases

sri-cdn-security.md

markdown

Subresource Integrity (SRI) for CDN Scripts

sri-hash-cdn-security.html

html

HTML Sanitization Function - XSS Prevention

xss-prevention-escapehtml.js

javascript

xss-prevention-tooltip.md

markdown

xss-safe-dom-construction.js

javascript

Sentiment Analysis

VADER Sentiment Analysis Integration

vader_sentiment_analyzer.py

Simple and effective sentiment analysis using VADER (Valence Aware Dictionary and sEntiment Reasoner), optimized for social media text, short messages...

python 1 deps 5 use cases

Social Media Clients

at-protocol-uri-construction.ts

typescript

at_protocol_facet_computation.ts

typescript

Post an image + alt text to Bluesky from the browser — no SDK, no server.

bluesky-browser-post-with-alt.js

javascript

Bluesky / AT Protocol Patterns

bluesky-patterns.md

markdown

Bluesky AT Protocol Client

bluesky_at_protocol_client.py

Complete AT Protocol client for Bluesky social network with SQLite caching, batch processing, rate limiting, and interactive account management.

python 2 deps 4 use cases

Spatial Algorithms

hex-grid-smart-spawn.ts

typescript

inter-cluster-proximity-lines.ts

typescript

Streaming Patterns

Flask Streaming Proxy for a Vision Chat Completions API

alt_proxy.py

A Flask-based proxy that forwards image-analysis requests to an OpenAI-compatible vision chat completions endpoint (e.g. x.ai Grok Vision, OpenAI GPT-...

python

Anthropic web_search over SSE: typed frames, trailing citations, history sanitization

anthropic-web-search-sse-citations.py

Flask endpoint streaming a Claude response (with the server-side web_search tool enabled) to a browser as Server-Sent Events. Three pieces that are ea...

python 2 use cases

Buffered Tag Parser for Streaming Text

buffered-tag-parser.md

markdown

flask_sse_blueprint_ollama_provider.py

python

multi-provider-sse-mixed-yield-normalization.py

python

Hardened NDJSON→SSE streaming proxy (Flask)

ndjson-to-sse-hardened-proxy.md

markdown

Paragraph-aware streaming buffer for progressive message delivery.

paragraph_stream_buffer.py

python

Per-section unlock state machine for streaming generation UIs

per-section-unlock-state-machine.md

markdown

Section-aware streaming buffer for progressive Telegram delivery.

section_stream_buffer.py

python

Server-Sent Events (SSE) Streaming Pattern

sse_streaming_responses.py

Comprehensive patterns for implementing Server-Sent Events streaming in web applications. Supports both Flask and FastAPI implementations with proper ...

python 4 deps 5 use cases

streamed-json-prefix-extract.js

javascript

Streaming Progress Callback Utilities

streaming_progress_callbacks.py

Safe, composable callback helpers for streaming real-time progress events out of long-running (often async) workflows. Wrap arbitrary user-supplied ca...

python

Telegram Bot Patterns

Privacy-Respecting Bot Patterns

privacy-patterns.md

markdown

Telegraph

Self-contained Telegraph API client and LLM tool wrapper.

telegraph_llm_tool.py

python

Shared Telegraph publisher with scrambled URLs and page tracking.

telegraph_publisher.py

python

Tool Registration

Pattern: Deterministic Tool Pool Assembly

deterministic-tool-pool.md

markdown

MCP HTTP-to-Stdio Bridge

mcp_http_bridge.py

Bridges a local stdio MCP client (Cursor, Codex, Claude Desktop, etc.) to a remote HTTP MCP server. The client speaks JSON-RPC over stdin/stdout while...

python

mcp_stdio_server_pattern.py

python

Deterministic Tool Pool Assembly

pool_assembler.py

python 3 use cases

Swarm Module Pattern - Dynamic Tool Registration

swarm_module_pattern.py

A comprehensive pattern for creating dynamically discoverable and registerable tool modules. This pattern allows tools to be automatically discovered,...

python 5 deps 5 use cases

Trpc

jwt-cookie-context.ts

typescript

procedure-tiers.ts

typescript

Typescript Package Exports

SNIPPET: Handling Major Version Dependency Upgrades

dependency-major-version-upgrade.md

markdown

Ui Patterns

Additive shell adapter — one app brain, many DOM geometries

additive-shell-adapter-render-monkeypatch.md

markdown

Chat-first editor onboarding affordances (creation lane, prompt deck, mood theming)

chat-first-editor-onboarding-affordances.md

markdown

circle_menu_fanout.html

html

collapsible-presence-activity-panel.tsx

typescript

Confirm-before-speak (never auto-speak generated output)

confirm-before-speak-aac.md

markdown

CSS-variable-driven SVG silhouettes with explicit-fill swatches

css-var-svg-silhouette-with-swatches.md

markdown

DOM-teleport overlay (focus-mode pattern)

dom-teleport-overlay.md

markdown

Focus-trap for modal overlays (vanilla JS)

focus-trap-modal.md

markdown

Host-agnostic mount module pattern

host-agnostic-mount-module.md

markdown

Snippet: Lazy Symbol Loader with IntersectionObserver + MutationObserver

lazy-symbol-loader-intersection-observer.md

markdown

Long-Press Touch Drag vs Canvas Pan

long-press-drag-vs-canvas-pan.md

markdown

mobile-overflow-toolbar.tsx

typescript

Multi-store fresh-start coordination

multi-store-fresh-start.md

markdown

Persistent floating "customer-service-bot" chat dock

persistent-floating-chat-dock.md

markdown

Platform-Gated Optional Prop (Hide UI Without Runtime Flags)

platform-gated-optional-prop.md

markdown

Recently-added filter + badge

recently-added-filter.md

markdown

Responsive Horizontal Controls Pattern

responsive-horizontal-controls.md

markdown

Singleton In-Flight Spinner

singleton-in-flight-spinner.md

markdown

Small pixel-art glyphs: hate-symbol hazard + reliable digit/flip patterns

small-pixel-glyph-hazards-and-flip-clocks.md

markdown

Sort dropdown that composes with `[hidden]` filtering

sort-composes-with-hidden-filter.md

markdown

SwiftUI WidgetKit + Canvas: two gotchas that bite

swiftui-widgetkit-canvas-face-gotchas.md

markdown

Web Speech API TTS wrapper (speak / cancel / support-check)

web-speech-tts-wrapper.md

markdown

Utilities

ascii-language-detection.ts

typescript

Atomic JSON State Store

atomic_json_state_store.py

Tiny per-key JSON persistence for lightweight process state (last-seen IDs, cursors, offsets, poller checkpoints). Use when a long- running worker nee...

python

Base Class Pattern for Plugin/Tool Architecture

base-class-pattern.py

Extensible base class pattern for building plugin systems, tool libraries, or modular components. Uses Pydantic for validation, abstract methods for e...

python 2 deps 4 use cases

blob-url-lifecycle.js

javascript

Cache Manager with Redis and In-Memory Fallback

cache_manager.py

Caches responses (e.g. LLM API calls) to save cost and latency. Uses Redis when reachable and transparently falls back to an in-memory dict with TTL e...

python

Cache Manager with Redis and In-Memory Fallback

cache_manager_redis_fallback.py

Production-ready cache manager that uses Redis when available and gracefully falls back to in-memory dict. Includes TTL support, statistics tracking, ...

python 1 deps 5 use cases

Cryptographic Utilities

crypto_utilities.py

Lightweight cryptographic helpers for hashing, HMAC signatures, key derivation, and optional symmetric encryption using Fernet.

python 4 deps 6 use cases

Data validation helpers for lightweight schema enforcement.

data_validation.py

python

Date and Time Utilities

datetime_utilities.py

Production-ready date and time manipulation utilities for parsing, formatting, and working with timestamps, timezones, and human-readable time represe...

python 3 deps 5 use cases

Embedding Generation and Semantic Similarity Pattern

embedding_generation_similarity.py

Production-ready pattern for generating text embeddings and performing semantic similarity search using multiple providers (Ollama, OpenAI). Includes ...

python 3 deps 6 use cases

Environment Configuration Utilities

env_config_utilities.py

Utilities for loading and validating environment variables with type conversion, default values, and required field checking. Essential for 12-factor ...

python 3 deps 5 use cases

ES6 Module Lazy Loading Pattern

es6-lazy-loading-pattern.md

markdown

Flask Image Handling Utilities

flask_image_handling.py

Robust image decoding, validation, and response formatting for Flask vision APIs. Handles both JSON (base64) and multipart form uploads. Eliminates du...

python 3 deps 5 use cases

iOS App Icon + Launch Hero Generator

generate-app-icon.py

Generate every iOS AppIcon.appiconset rendition (and a LaunchHero bitmap) from a single master PNG. Auto-crops the source to the non-white icon bounds...

python

IMAP Inbox Reader

inbox.py

A small, dependency-free IMAPS client for reading messages from a mailbox. Supports fetching unread mail, incremental fetch by UID (poll for new mail ...

python

Logging Utilities

logging_utilities.py

Production-ready logging configurations with structured logging, multiple handlers, log rotation, and context-aware logging for microservices and AI a...

python 5 deps 6 use cases

MailMessage — immutable representation of an email, incoming or outgoing.

message.py

python

Rate limiting utilities for Flask applications.

rate_limit.py

python

Rate Limiting Utilities

rate_limiter.py

Production-ready rate limiting implementations for both synchronous and asynchronous code. Includes semaphore-based concurrency control, token bucket ...

python 5 deps 5 use cases

Redis Cache Manager

redis_cache_manager.py

Production-ready Redis caching utilities with TTL support, semantic caching for LLM responses, rate limiting, and connection pooling. Provides both di...

python 5 deps 5 use cases

Retry Decorator with Exponential Backoff

retry_decorator.py

A production-ready retry decorator that handles transient failures with exponential backoff, configurable exception handling, and comprehensive loggin...

python 4 deps 5 use cases

scan-dir-build-platform-manifests.py

python

Service Proxy with Circuit Breaker

service_proxy.py

Wraps HTTP calls to a backend service with resilience logic so a slow or down dependency degrades gracefully instead of hanging your app. Use it in pl...

python

String Manipulation Utilities

string_utilities.py

Comprehensive string manipulation utilities for text processing, sanitization, formatting, and validation. Essential for working with user input, API ...

python 4 deps 6 use cases

Timezone and Duration Utilities with pytz

timezone_and_duration_utilities.py

Comprehensive timezone conversion, time difference calculation, and duration parsing utilities using pytz for production-grade timezone support.

python 2 deps 6 use cases

Text-to-Speech Utilities

tts.py

python

TypeScript: JSON File State Persistence

typescript-json-state-persistence.md

markdown

Same as solver 1, but enforce English sentence flow: rows of active words

wordclock_span_solver.py

python

YouTube Audio Extractor

youtube_audio_extractor.py

python

Vision Patterns

Batch Alt-Text Generator for a Directory of Images

alt_gen_master.py

python 4 use cases

Image Cutout Extraction for Parallax Depth Layers

extract_cutouts.py

python 4 use cases

Image operations: type detection, resizing, format conversion, and

image_ops.py

python

Provenance bulk-classify pattern

provenance-bulk-classify.md

markdown

Snippet: Three.js Tooltip Guard Clause

threejs-tooltip-guard-clause.md

markdown

Vision API Client

vision_client.py

Comprehensive vision analysis client for image and video analysis using AI vision models (xAI Grok Vision, OpenAI Vision, etc.) with structured result...

python 3 deps 6 use cases

Vision-LLM enrichment pass that also detects duplicates against a known corpus.

vision_enrich_with_references.py

python

Common patterns for vision-based Flask services.

vision_service.py

python

Web Clocks

Accessibility

accessibility.md

markdown

Canvas Animation & Rendering

canvas-animation.md

markdown

Color & Color-Space Math

color.md

markdown

CSS Effects & Tricks

css-tricks.md

markdown

Interaction & Input

interaction.md

markdown

Layout & Responsive Canvas

layout-responsive.md

markdown

Math, Easing & Interpolation

math.md

markdown

Miscellaneous

misc.md

markdown

Numeral Systems & Encoders

numeral-systems.md

markdown

Performance

performance.md

markdown

Physics & Simulation

physics.md

markdown

SVG

svg.md

markdown

Text Rendering

text-rendering.md

markdown

Time Math & Scheduling

time-math.md

markdown

WebGL & Shaders

webgl-shaders.md

markdown

Web Frameworks

Audio/Video Feature Quick Start Guide

AUDIO_VIDEO_QUICK_START.md

markdown

Flask + Caddy: Absolute URLs with Path Stripping

absolute-urls-with-path-stripping.md

markdown

Anonymous-then-claim auth via signed owner tokens.

anonymous_owner_token_with_email_claim.py

python 4 use cases

Single-file web-clock patterns (harvested 2026-06-21)

clock-patterns-2026-06.md

markdown

Flask CORS Configuration Helper

cors_config.py

Standardized CORS setup for Flask apps serving a browser/API frontend. Registers flask-cors on your API routes with sensible defaults (credentials, co...

python

Device Pairing → Opaque Bearer Token Auth (web-to-native handoff)

device-pairing-token-auth.md

markdown

Flask + SQLite-WAL versioned KV store — two-writer sync without a database

flask-sqlite-wal-kv-store.md

markdown

Flask Server-Sent Events (SSE) Endpoint Pattern

flask-sse-endpoint.py

Flask implementation for streaming Server-Sent Events responses, perfect for AI text generation, real-time progress updates, and multi-agent systems. ...

python 2 deps 4 use cases

flask-sse-passthrough.py

python

Flask API Gateway Route Templates

flask_api_gateway_route_templates.py

7 copy-paste templates for building API gateway proxy routes in Flask. Each template handles a different HTTP pattern with proper error handling, vali...

python 3 use cases

Flask Audio File Upload and Processing Handler

flask_audio_file_handler.py

Complete audio file upload, validation, and processing pattern for speech-to-text, text-to-speech, and audio generation workflows.

python 3 deps 4 use cases

Flask Authentication and Authorization Decorators

flask_authentication_decorators.py

Production-ready authentication patterns using decorators for Flask routes. Includes API key validation, JWT tokens, role-based access control, and li...

python 4 deps 6 use cases

Flask Blueprint Organization Patterns

flask_blueprint_organization.py

Comprehensive patterns for organizing Flask applications using blueprints. Demonstrates route organization, service layer pattern, caching decorators,...

python 3 deps 6 use cases

Flask Blueprint with URL Prefix Pattern

flask_blueprint_with_url_prefix.py

Proper Flask Blueprint configuration for hosting applications under a sub-path (e.g., /io/studio, /api/v1). Handles session cookies, static files, and...

python 1 deps 4 use cases

Flask ATTACH DATABASE Read-Only for Cross-SQLite-File Joins

flask_cross_db_attach_readonly.py

Your request handler needs to JOIN data that lives in two sibling SQLite files (e.g. a hot primary DB and a heavy-write atlas DB). You don't want to c...

python 2 deps 4 use cases

Flask Application Factory Pattern with Blueprints

flask_factory_pattern_with_blueprints.py

Production-grade Flask application using factory pattern for testing and configuration flexibility. Demonstrates blueprint organization, caching confi...

python 5 deps 5 use cases

flask-limiter Key Function Scoped by Blueprint

flask_limiter_per_blueprint_key.py

python 3 use cases

flask-limiter behind a reverse proxy: key on the real client IP, not the proxy.

flask_limiter_proxyfix_real_client_ip.py

python

Flask Middleware and Request/Response Hooks

flask_middleware_patterns.py

Comprehensive patterns for Flask middleware using before_request, after_request, and custom middleware classes. Includes analytics tracking, authentic...

python 4 deps 6 use cases

Flask Multi-Provider API Proxy Pattern

flask_multi_provider_api_proxy.py

Production-ready Flask proxy server for multiple AI/LLM providers with comprehensive error handling, rate limiting, CORS configuration, and provider a...

python 5 deps 5 use cases

Flask Multipart File Upload Handler

flask_multipart_file_upload.py

Robust file upload handling with validation, type checking, and error handling. Supports multiple file types and size limits.

python 2 deps 4 use cases

Prefixed LRU+TTL Cache for Multi-Tenant Flask

flask_prefixed_cache_multi_tenant.py

python 4 use cases

Flask-SocketIO Setup for Real-Time Applications

flask_socketio_setup.py

Complete Flask-SocketIO configuration with CORS, threading mode, and proper initialization for real-time bidirectional communication.

python 5 deps 5 use cases

Flask Video Generation and Upload Handler

flask_video_generation_handler.py

Video upload, processing, and generation handler for AI video models and video analysis workflows.

python 3 deps 4 use cases

Gunicorn + Eventlet Deployment Guide for Flask-SocketIO

gunicorn_socketio_deployment.md

markdown

Gunicorn + Eventlet Configuration for Flask-SocketIO Apps

gunicorn_socketio_deployment.py

Production deployment configuration for Flask-SocketIO applications using Gunicorn with eventlet worker class. This pattern enables WebSocket support,...

python 4 deps 5 use cases

Health check utilities for Flask applications.

health.py

python

HTML → Markdown round-trip on contenteditable save.

html_to_markdown_edit_roundtrip.py

python 4 use cases

Idempotent log-on-merge endpoint (buffer-then-patch client)

idempotent-log-on-merge.md

markdown

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

LLM image-gen proxy: subject + style split with style-aware soften retry

llm_image_proxy_subject_style_split.py

python

Common middleware registration utilities for Flask apps.

middleware.py

python

Playwright social-card / OG-image capture from a live page

playwright-social-card-capture.md

markdown

Flask Production Hardening Pattern

production-hardening-pattern.py

python

Quota-guarded speculative prefetch

quota-guarded-prefetch.md

markdown

Caddy: Remove Security Headers for iframe Support

remove-security-headers-for-iframe.md

markdown

Renderless Manager → React Event Bridge

renderless-manager-to-react-event-bridge.md

markdown

Self-registering renderer registry with shape-sniffing (vanilla JS)

self-registering-renderer-registry.md

markdown

Markdown to Telegram HTML converter.

telegram_html_formatter.py

python

Websocket Patterns

react-ws-collab-hook.ts

typescript

WebSocket Client with Auto-Reconnection

websocket_client_with_reconnect.py

Robust WebSocket client pattern with automatic reconnection, timeout handling, and graceful error recovery. Based on the websockets library for async ...

python 2 deps 4 use cases

WebSocket Firehose Connection with Auto-Reconnection

websocket_firehose_reconnection.py

Robust asyncio-based WebSocket client for consuming real-time data streams (firehoses) with automatic reconnection, timeout handling, and graceful err...

python 2 deps 4 use cases