baseContext:
  Purpose:
    - Asynchronously build base context object with site-wide data for rendering views.
    - Construct rendering context and helpers for templates.
  "Lifecycle Role": Prepare shared context before rendering templates.
  Dependencies:
    Upstream:
      - postMenuService
      - utilityFunctions (formatMonths, filterSecureLinks)
      - environmentVariables
      - jsonContentFiles
      - getBaseContext
      - qualifyLink
      - generateToken
    Downstream:
      - routeHandlers
      - controllers rendering pages with standard site context
      - view renderers
  "Data Flow":
    Inputs:
      - isAuthenticated boolean
      - optional context overrides
      - req.isAuthenticated
    Outputs:
      - context object with UI state, navigation, menus, environment-configured values
      - res.locals.baseContext
      - custom render functions
    "Side Effects":
      - Token generation
      - async file reads
  "Performance and Scalability":
    Bottlenecks:
      - async file reads (getPostsMenu) delay on slow IO
      - reliance on correct environment variable settings
      - possible navLinks JSON file read failures or malformed data
      - Token generation per request
    Concurrency: None
  "Security and Stability":
    Validation:
      - Filters secure links based on authentication
      - Requires validation of dynamic environment variables
      - Dynamic content used in views must be escaped
    Vulnerabilities:
      - Risk of environment variable injection if unvalidated
      - Token misuse via URLs
  "Architecture Assessment":
    Coupling: Moderate coupling to post menu service, utilities, environment, token logic
    Abstraction:
      - Centralizes context building to promote DRY templates
      - Rendering context injection
    Recommendations:
      - Cache menu and navLinks to reduce IO per request
      - Validate environment variables at startup
      - Memoize within request lifecycle to avoid repeated calls
      - Cache static context
      - Sanitize dynamic content

BaseRoute:
  Purpose: Define base class encapsulating Express Router instance for modular route classes.
  "Lifecycle Role": Used during route setup to organize route handlers and middleware.
  Dependencies:
    Upstream: []
    Downstream:
      - routeClasses extending BaseRoute (e.g., ConstructionRoutes)
  "Data Flow":
    Inputs: none beyond instantiation
    Outputs: Express Router object
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: None inherent
    Concurrency: None
  "Security and Stability":
    Validation: None inherent
    Vulnerabilities: None inherent
  "Architecture Assessment":
    Coupling: Low, promotes modular route design
    Abstraction: Base abstraction for route management
    Recommendations: None; minimalistic and functional

baseUrl:
  Purpose: Construct and export base application URL considering environment variables and overrides.
  "Lifecycle Role": Used in context building, link generation, and canonical URL formation.
  Dependencies:
    Upstream:
      - environmentVariables
    Downstream:
      - baseContext
      - routeHandlers
      - API modules needing URL consistency
  "Data Flow":
    Inputs: environment variables or parameters for schema, host, port
    Outputs: constructed base URL string
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: None significant; possible environment misconfiguration
    Concurrency: None
  "Security and Stability":
    Validation: Strips protocol and trailing slash correctly; hardcoded default port/protocol logic
    Vulnerabilities: None significant
  "Architecture Assessment":
    Coupling: Low coupling, utility for URL construction
    Abstraction: Encapsulates base URL logic
    Recommendations:
      - include port in output if non-default ports used
      - cache computed URL if environment variables are static

ConstructionRoutes:
  Purpose: Extend BaseRoute to provide "under construction" placeholder pages for specified routes.
  "Lifecycle Role": Handle GET requests for unimplemented routes with construction page response.
  Dependencies:
    Upstream:
      - BaseRoute
    Downstream:
      - main route registration logic mounting ConstructionRoutes
  "Data Flow":
    Inputs: HTTP GET requests on registered paths
    Outputs: rendered HTML construction page
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks:
      - potential failures if view template missing or broken
    Concurrency: None
  "Security and Stability":
    Validation: None explicit; minimal risk due to static content
    Vulnerabilities: Minimal
  "Architecture Assessment":
    Coupling: Depends on BaseRoute and template engine
    Abstraction: Modular route for placeholder handling
    Recommendations:
      - add error handling middleware for render failures
      - log access to construction pages for prioritization
createExcerpt:
  Purpose: Generate plain-text excerpt from markdown content by stripping syntax and truncating.
  "Lifecycle Role": Used during post content processing and metadata creation for previews or summaries.
  Dependencies:
    Upstream: markdown content
    Downstream:
      - post rendering logic
      - summary generation modules
      - UI components needing brief previews
      - post metadata
  "Data Flow":
    Inputs: markdown content string, optional character limit (default ~200 chars)
    Outputs: truncated plain-text excerpt substring
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: None; pure function
    Concurrency: None
  "Security and Stability":
    Validation:
      - Basic regex or parsing to strip markdown syntax
    Vulnerabilities:
      - incomplete markdown parsing risks malformed excerpts
      - truncation may cut mid-word
  "Architecture Assessment":
    Coupling: Low; standalone utility
    Abstraction: Markdown to plain text excerpt converter
    Recommendations:
      - Use dedicated markdown parser for accuracy if precision required
      - Truncate cleanly at word or sentence boundaries
      - Cache excerpts for static content to reduce recomputation

diskSpaceMonitor:
  Purpose: Monitor disk space usage of log directory, auto-clean old logs/session data per thresholds.
  "Lifecycle Role": Runs asynchronously independent of request/response; provides middleware and API endpoints.
  Dependencies:
    Upstream: []
    Downstream:
      - admin routes/middleware needing disk space status
      - API handlers for status and cleanup
      - main app initialization
  "Data Flow":
    Inputs:
      - configured log directory path
      - cleanup thresholds and retention policies
      - HTTP requests for status/manual cleanup
      - admin route requests for middleware
    Outputs:
      - JSON responses with disk status or cleanup results
    "Side Effects":
      - reads filesystem stats
      - deletes old log files and session data
      - logs cleanup actions
      - sets timers for periodic monitoring
  "Performance and Scalability":
    Bottlenecks:
      - slow filesystem access or permission errors
      - recursive directory size calc and deletion overhead on large/deep dirs
      - potential race conditions if multiple cleanups overlap
    Concurrency: None; no explicit Concurrency control
  "Security and Stability":
    Validation: Deletes based on mod date; config must prevent unintended data loss
    Vulnerabilities:
      - risk of deleting critical data if misconfigured
      - needs correct permissions without excessive privileges
      - long async ops may block event loop if unmanaged
      - lacks Concurrency control risking inconsistencies
  "Architecture Assessment":
    Coupling: Low; internal fs dependency, exposed middleware and API
    Abstraction: Encapsulates disk space monitoring and cleanup
    Recommendations:
      - add Concurrency controls (mutex/flags)
      - optimize size calc with caching or sampling
      - enhance logging for audits
      - expose config via env or external files
      - add alerting/integration for admin notifications
      - validate directory paths to prevent injection
      - limit cleanup scope to safe dirs/file types
      - offload heavy IO to worker threads/processes

emailValidator:
  Purpose: Validate and sanitize emails per RFC 5321 and common formatting rules; returns structured validation.
  "Lifecycle Role": Used during input validation for email fields.
  Dependencies:
    Upstream: []
    Downstream: []
  "Data Flow":
    Inputs: raw email string
    Outputs: validation results including errors or normalized email
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: None
    Concurrency: None
  "Security and Stability":
    Validation: Strict email format and RFC compliance checks
    Vulnerabilities: Potential failure on edge-case email formats if regex incomplete
  "Architecture Assessment":
    Coupling: Low; utility function
    Abstraction: Input validation component
    Recommendations:
      - maintain regex patterns to cover RFC edge cases
      - sanitize inputs to avoid injection

logging:
  Purpose: Implements a logging system combining Winston, file logs, SQLite transport, and console patching with a custom 'security' level.
  "Lifecycle Role": Global utility during request/response lifecycle and runtime.
  Dependencies:
    Upstream:
      - winston
      - daily rotating file logs
      - SQLite transport
      - console patch
    Downstream:
      - all modules requiring logging
  "Data Flow":
    Inputs: Log calls from application modules.
    Outputs: Persisted logs to disk, database, console.
    "Side Effects": Disk and DB I/O operations.
  "Performance and Scalability":
    Bottlenecks:
      - Disk full or permission issues
      - Synchronous or heavy logging load
      - Log flooding under high volume
    Concurrency: None
  "Security and Stability":
    Validation: Log content must be sanitized to avoid secret leaks.
    Vulnerabilities:
      - Logging sensitive information
  "Architecture Assessment":
    Coupling: Loosely coupled via shared utility usage.
    Abstraction: Provides centralized logging abstraction.
    Recommendations:
      - Use asynchronous or buffered logging
      - Add sensitive data redaction
      - Enforce aggressive log rotation
      - Secure log file permissions

adminToken:
  Purpose: Manages short-lived in-memory admin pre-authentication tokens.
  "Lifecycle Role": Authentication/authorization phase.
  Dependencies:
    Upstream: None
    Downstream:
      - admin route handlers
      - auth middleware
      - security check modules
  "Data Flow":
    Inputs: Token generation, validation, revocation requests.
    Outputs: Token strings, boolean validation results.
    "Side Effects": Updates in-memory Map, token cleanup.
  "Performance and Scalability":
    Bottlenecks:
      - Tokens lost on app restart
      - Memory bloat without cleanup
      - Time sync issues affecting token validity
    Concurrency: None
  "Security and Stability":
    Validation: Token format checked, stored with expiration.
    Vulnerabilities:
      - No multi-instance sync
      - No brute force prevention
      - Low entropy in token encoding
  "Architecture Assessment":
    Coupling: Minimal coupling, internal state.
    Abstraction: Encapsulated token lifecycle management.
    Recommendations:
      - Add scheduled cleanup
      - Use centralized cache for persistence
      - Harden token generation
      - Add validation logging and rate limits

errorContext:
  Purpose: Maps HTTP status codes to error page metadata.
  "Lifecycle Role": Used by errorPage route during error rendering.
  Dependencies:
    Upstream: None
    Downstream:
      - errorPage route
  "Data Flow":
    Inputs: HTTP status codes.
    Outputs: Metadata for error page.
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: None
    Concurrency: None
  "Security and Stability":
    Validation: Static mapping.
    Vulnerabilities: None
  "Architecture Assessment":
    Coupling: Low.
    Abstraction: Simple mapping utility.
    Recommendations: None

formLimiter:
  Purpose: Express middleware for rate limiting form submissions.
  "Lifecycle Role": Applied to POST `/contact` route.
  Dependencies:
    Upstream: None
    Downstream:
      - contact form route
  "Data Flow":
    Inputs: Form POST requests.
    Outputs: HTTP responses with possible rate limit errors.
    "Side Effects": Rate limit counters.
  "Performance and Scalability":
    Bottlenecks: Rate limiter state accumulation.
    Concurrency: None
  "Security and Stability":
    Validation: IP or session-based rate check.
    Vulnerabilities:
      - Bypass via IP spoofing
  "Architecture Assessment":
    Coupling: Middleware-specific.
    Abstraction: Applied at route level.
    Recommendations:
      - Use distributed rate limit store for scaling

hcaptcha:
  Purpose: Verifies hCaptcha tokens using external API.
  "Lifecycle Role": Used in contact form POST route.
  Dependencies:
    Upstream: hCaptcha API
    Downstream:
      - contact form validation logic
  "Data Flow":
    Inputs: hCaptcha response token.
    Outputs: Verification result.
    "Side Effects": External API call.
  "Performance and Scalability":
    Bottlenecks:
      - External API latency
    Concurrency: None
  "Security and Stability":
    Validation: Validates token via hCaptcha API.
    Vulnerabilities:
      - Reliance on external service availability
  "Architecture Assessment":
    Coupling: External service dependent.
    Abstraction: API wrapper.
    Recommendations:
      - Add retry logic and fallback handling

mail:
  Purpose: Sends contact form submission emails.
  "Lifecycle Role": Triggered after successful form submission.
  Dependencies:
    Upstream: Email provider or SMTP
    Downstream:
      - contact form success handler
  "Data Flow":
    Inputs: Form data.
    Outputs: Outgoing email.
    "Side Effects": Sends email via transport.
  "Performance and Scalability":
    Bottlenecks:
      - SMTP failures or delays
    Concurrency: None
  "Security and Stability":
    Validation: Email fields sanitized.
    Vulnerabilities:
      - Email injection
  "Architecture Assessment":
    Coupling: Tied to email transport.
    Abstraction: Mail utility.
    Recommendations:
      - Validate inputs strictly
      - Handle email delivery errors
postFileUtils:
  Purpose:
    - Reads blog post files and metadata.
    - Parses frontmatter, excerpts, and metadata from markdown files.
  "Lifecycle Role": Used by blog routes and post retrieval during page rendering.
  Dependencies:
    Upstream:
      - Filesystem
      - gray-matter
      - createExcerpt
      - hash util
      - fs, path
    Downstream:
      - blog route handlers
      - blog services
      - menu/rss/sitemap generators
  "Data Flow":
    Inputs:
      - Blog file paths
      - directory and options tags/sort
    Outputs:
      - Parsed content and metadata
      - array of post metadata objects
    "Side Effects":
      - File reads
  "Performance and Scalability":
    Bottlenecks:
      - Disk I/O, including recursive reads
      - in-memory sorting
    Concurrency: None
  "Security and Stability":
    Validation:
      - File name sanitation required
      - Validate slug/tags/title/date
    Vulnerabilities:
      - Path traversal
      - malformed frontmatter
      - unsanitized metadata
  "Architecture Assessment":
    Coupling: Moderate coupling; filepath handling tightly linked
    Abstraction: Content loader and parser utility
    Recommendations:
      - Sanitize paths
      - Cache parsed content using LRU or indexed cache
      - Implement indexing and depth limits for recursive reads

forensics:
  Purpose: Performs security analysis on form data to detect abuse.
  "Lifecycle Role": Used during form submission processing.
  Dependencies:
    Upstream: None
    Downstream:
      - contact form route
  "Data Flow":
    Inputs: Form data.
    Outputs: Spam/abuse detection results.
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: Complex rule sets.
    Concurrency: None
  "Security and Stability":
    Validation: Heuristic or rule-based checks.
    Vulnerabilities:
      - False positives/negatives
  "Architecture Assessment":
    Coupling: Route logic dependent.
    Abstraction: Validation helper.
    Recommendations:
      - Tune detection rules
      - Log detection results

linkUtils:
  Purpose: Identifies URLs and emails in strings.
  "Lifecycle Role": Used in text processing.
  Dependencies:
    Upstream: None
    Downstream:
      - text rendering components
  "Data Flow":
    Inputs: Arbitrary strings.
    Outputs: Detected links or email addresses.
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: Regex overhead.
    Concurrency: None
  "Security and Stability":
    Validation: None.
    Vulnerabilities:
      - Regex denial-of-service
  "Architecture Assessment":
    Coupling: Utility.
    Abstraction: String analysis helper.
    Recommendations:
      - Use optimized regex
      - Add input length limits

analytics:
  Purpose: Logs GET requests for HTML to SQLite for analytics.
  "Lifecycle Role": Early middleware on HTML GET routes.
  Dependencies:
    Upstream:
      - ../utils/sqlite3
    Downstream:
      - main Express app
  "Data Flow":
    Inputs: Request metadata (URL, headers, IP).
    Outputs: DB record insertions.
    "Side Effects": Database writes.
  "Performance and Scalability":
    Bottlenecks:
      - SQLite write contention
      - Silent DB failures
    Concurrency: None
  "Security and Stability":
    Validation: None
    Vulnerabilities:
      - Unsanitized inputs to DB
  "Architecture Assessment":
    Coupling: Database dependent.
    Abstraction: Logging middleware.
    Recommendations:
      - Add input sanitization
      - Use async writes or queuing
      - Handle DB write errors

applyProductionSecurity:
  Purpose: Aggregates multiple middleware to enforce security in production.
  "Lifecycle Role": Early middleware after parsing.
  Dependencies:
    Upstream:
      - helmet
      - hpp
      - xssSanitizer
      - HttpError
      - ../constants/securityConstants
    Downstream:
      - all route handlers
  "Data Flow":
    Inputs: HTTP request headers, method, hostname.
    Outputs: Response security headers or early errors.
    "Side Effects": Middleware effects.
  "Performance and Scalability":
    Bottlenecks:
      - Middleware misconfiguration
    Concurrency: None
  "Security and Stability":
    Validation: Sanitizes inputs, enforces security headers.
    Vulnerabilities:
      - Potential XSS bypass
      - Localhost block may misfire
  "Architecture Assessment":
    Coupling: Moderate.
    Abstraction: Security enforcement wrapper.
    Recommendations:
      - Add rate limiter
      - Improve logging for rejections
      - Review CSP rules

authCheck:
  Purpose: Verifies authentication using external service and caching.
  "Lifecycle Role": Early middleware before protected routes.
  Dependencies:
    Upstream:
      - node-fetch
      - ../constants/authConstants
    Downstream:
      - all auth-required routes
  "Data Flow":
    Inputs: Request headers, IP.
    Outputs: req.isAuthenticated flag.
    "Side Effects": Logs and in-memory cache update.
  "Performance and Scalability":
    Bottlenecks:
      - External service timeout
      - Cache staleness
    Concurrency: None
  "Security and Stability":
    Validation: Token check via external service.
    Vulnerabilities:
      - IP spoofing
      - Cache poisoning
  "Architecture Assessment":
    Coupling: Tied to auth service.
    Abstraction: Caching middleware.
    Recommendations:
      - Harden cache keys
      - Remove IP bypass
      - Consider JWT-based approach

csrfToken:
  Purpose: Provides CSRF protection using cookie tokens.
  "Lifecycle Role": Before routes rendering or processing forms.
  Dependencies:
    Upstream:
      - csurf
      - cookie-parser
    Downstream:
      - form routes
  "Data Flow":
    Inputs: Cookies, form requests.
    Outputs: CSRF token in res.locals and cookies.
    "Side Effects": Token set in cookies.
  "Performance and Scalability":
    Bottlenecks:
      - Cookie parsing overhead
    Concurrency: None
  "Security and Stability":
    Validation: Token validated on submission.
    Vulnerabilities:
      - Token exposure
  "Architecture Assessment":
    Coupling: Standard middleware.
    Abstraction: CSRF protection layer.
    Recommendations:
      - Use secure cookie flags
      - Automate token injection in templates

errorHandler:
  Purpose: Centralized application error logging and rendering.
  "Lifecycle Role": Final Express error handler.
  Dependencies:
    Upstream:
      - error rendering utils
      - constants
    Downstream: None
  "Data Flow":
    Inputs: Error object, request context.
    Outputs: Rendered error page or redirect.
    "Side Effects": Logging.
  "Performance and Scalability":
    Bottlenecks:
      - Logging failure
    Concurrency: None
  "Security and Stability":
    Validation: Renders user-safe errors.
    Vulnerabilities:
      - Stack trace exposure
  "Architecture Assessment":
    Coupling: High with error path.
    Abstraction: Final middleware.
    Recommendations:
      - Escape rendered messages
      - Monitor error frequency

formatHtml:
  Purpose: Beautifies outgoing HTML using js-beautify.
  "Lifecycle Role": After HTML generation, before response send.
  Dependencies:
    Upstream:
      - js-beautify
    Downstream: None
  "Data Flow":
    Inputs: HTML response.
    Outputs: Beautified HTML.
    "Side Effects": Response body modified.
  "Performance and Scalability":
    Bottlenecks:
      - Large HTML processing
    Concurrency: None
  "Security and Stability":
    Validation: Operates on safe content.
    Vulnerabilities:
      - Response inflation
  "Architecture Assessment":
    Coupling: Tied to response pipeline.
    Abstraction: Optional middleware.
    Recommendations:
      - Disable in production
      - Use conditional execution

logger:
  Purpose: Logs HTTP request metadata to console.
  "Lifecycle Role": Early middleware.
  Dependencies:
    Upstream:
      - console
    Downstream: None
  "Data Flow":
    Inputs: Request info.
    Outputs: Console log entry.
    "Side Effects": Console I/O.
  "Performance and Scalability":
    Bottlenecks:
      - Synchronous logging
    Concurrency: None
  "Security and Stability":
    Validation: None
    Vulnerabilities:
      - Logging sensitive data
  "Architecture Assessment":
    Coupling: Minimal.
    Abstraction: Simple middleware.
    Recommendations:
      - Use async logger
      - Add log level filtering

utils:
  Purpose: Collection of support functions for middleware and app logic.
  "Lifecycle Role": Used across app lifecycle to abstract functionality.
  Dependencies:
    Upstream:
      - sqlite3.js wraps SQLite3 DB
      - logger utility
      - context utilities
    Downstream:
      - middleware
      - controllers
      - route handlers
  "Data Flow":
    Inputs: Varies by utility (DB operations, logging calls, context)
    Outputs: DB responses, logs, context objects
    "Side Effects": File or DB I/O
  "Performance and Scalability":
    Bottlenecks:
      - Sync file or DB access
    Concurrency: None
  "Security and Stability":
    Validation: Varies; e.g., logger sanitizes messages
    Vulnerabilities:
      - Unsanitized inputs passed to DB or logs
  "Architecture Assessment":
    Coupling: Low-cross utility calls
    Abstraction: Centralized support functions
    Recommendations:
      - Standardize validation
      - Switch to async db/log I/O

newsletterService:
  Purpose: Manage subscriber emails in JSON file.
  "Lifecycle Role": Handles newsletter subscription endpoints.
  Dependencies:
    Upstream:
      - validateAndSanitizeEmail
      - filesystem
    Downstream:
      - newsletter API controllers
  "Data Flow":
    Inputs: raw email strings
    Outputs: promise results or errors
    "Side Effects": reads/writes JSON file
  "Performance and Scalability":
    Bottlenecks:
      - writeLock contention
      - filesystem latency
    Concurrency: None
  "Security and Stability":
    Validation: Email sanitation and validation
    Vulnerabilities:
      - JSON file exposed if misconfigured
      - No spam/rate limiting
  "Architecture Assessment":
    Coupling: Tight with filesystem and validation util
    Abstraction: File-based subscriber storage
    Recommendations:
      - Move to database
      - Rate limit subscription
      - Encrypt subscriber data
      - Use atomic writes

postsMenuService:
  Purpose: Build chronological menu of blog posts.
  "Lifecycle Role": Used when rendering blog navigation UI.
  Dependencies:
    Upstream:
      - getAllPosts
      - qualifyLink
    Downstream:
      - view templates
      - controllers
  "Data Flow":
    Inputs: baseDir of posts
    Outputs: grouped year/month menu array
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks:
      - disk I/O reading posts
    Concurrency: None
  "Security and Stability":
    Validation: None
    Vulnerabilities:
      - unsanitized metadata rendering
  "Architecture Assessment":
    Coupling: Moderate to post data util
    Abstraction: Pure data formatter
    Recommendations:
      - Add caching
      - Validate metadata
      - Optimize grouping logic

rssFeedService:
  Purpose: Generate RSS XML from blog posts.
  "Lifecycle Role": Responds to RSS feed endpoint.
  Dependencies:
    Upstream:
      - getAllPosts
      - rss package
    Downstream:
      - RSS route handler
  "Data Flow":
    Inputs: post baseDir and site URL
    Outputs: RSS XML string
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks:
      - fetching and parsing posts each request
    Concurrency: None
  "Security and Stability":
    Validation: Internal data only
    Vulnerabilities:
      - Uncached generation under high load
  "Architecture Assessment":
    Coupling: Moderate with post retrieval util
    Abstraction: Feed generator
    Recommendations:
      - Cache RSS output
      - Paginate or limit feed entries

sitemapService:
  Purpose: Build site sitemap including static pages, posts, tags.
  "Lifecycle Role": Handles sitemap endpoint generation.
  Dependencies:
    Upstream:
      - static JSON file
      - filesystem frontmatter parsing
      - getAllPosts
      - fast‑glob
      - slugify, link utils, hashing
    Downstream:
      - sitemap route handler
      - SEO tools
  "Data Flow":
    Inputs: various content directories
    Outputs: hierarchical sitemap + flattened URL list
    "Side Effects": filesystem reads
  "Performance and Scalability":
    Bottlenecks:
      - extensive file I/O and parsing
    Concurrency: None
  "Security and Stability":
    Validation: frontmatter validation missing
    Vulnerabilities:
      - may include unpublished pages
  "Architecture Assessment":
    Coupling: Broad across content modules
    Abstraction: Sitemap aggregator
    Recommendations:
      - Add caching
      - Limit Concurrency on file reads
      - Validate frontmatter
      - Separate static vs dynamic parts

MarkdownRoutes:
  Purpose: Serve markdown-based pages as HTML.
  "Lifecycle Role": GET request route handler.
  Dependencies:
    Upstream:
      - BaseRoute
      - filesystem
      - gray-matter
      - marked parser
    Downstream:
      - Express app
  "Data Flow":
    Inputs: request path
    Outputs: HTML response
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks:
      - disk read per request
    Concurrency: None
  "Security and Stability":
    Validation: None
    Vulnerabilities:
      - path traversal via request
      - unsanitized markdown content
  "Architecture Assessment":
    Coupling: Moderate to filesystem and parsing utils
    Abstraction: Router extension
    Recommendations:
      - Add caching layer
      - 404 missing files
      - Sanitize markdown output
      - Restrict source directories

parseMarkdownFile:
  Purpose: Read and parse markdown file frontmatter and content.
  "Lifecycle Role": Called during post parsing.
  Dependencies:
    Upstream:
      - fs.readFileSync
      - gray-matter
    Downstream:
      - postFileUtils
  "Data Flow":
    Inputs: file path
    Outputs: { data, content }
    "Side Effects": None
  "Performance and Scalability":
    Bottlenecks: sync disk read
    Concurrency: None
  "Security and Stability":
    Validation: None
    Vulnerabilities:
      - malformed frontmatter
  "Architecture Assessment":
    Coupling: Low
    Abstraction: Basic parser
    Recommendations:
      - Add error handling
      - Validate data schema

"Cross Cutting Summary":
  "Common Themes":
    - Heavy synchronous file I/O across services; slows responses.
    - No caching on computed Outputs (menu/rss/sitemap/markdown), causing redundant work.
    - Validation and sanitization missing for metadata, markdown, user input.
    - File‑based storage used where DB would scale better.
    - Utilities assume trusted environment; risk in public apps.
    - Logging is synchronous in several modules, needs async or buffered approach.
    - In-memory structures (adminToken, authCheck, CSRF) lack persistence for distributed deployment.
    - Lack of input validation and sanitization (analytics, mail, hcaptcha).
    - Middleware ordering and isolation are critical for performance and correctness.
    - Token-based modules should add entropy and expiry control.
    - Error and logging modules must sanitize output and handle I/O failures gracefully.
    - Several modules depend on external services (auth, hcaptcha, SMTP) with no retry or fallback logic.
    - Emphasis on caching to reduce repeated IO and improve performance.
    - Need for improved error handling and logging across modules.
    - Security focus on input validation, environment variable checks, and safe file operations.
    - Architectural preference for modular, loosely coupled utilities and route abstractions.
    - Performance concerns center on async file IO, recursive directory scanning, and potential event loop blocking.
  "Shared Risks":
    - Exposure of sensitive data through logs or tokens.
    - Performance Bottlenecks from synchronous operations.
    - Security risks from lack of validation, unsanitized inputs, weak tokens.
    - Architectural fragility due to tight coupling in dynamic loaders and hardcoded configurations.
    - Data corruption under concurrent writes (newsletter JSON).
    - Path traversal or content injection via markdown routes.
    - Performance degradation under load.
  "General Recommendations":
    - Centralize validation and sanitization.
    - Use distributed cache where persistence is needed.
    - Refactor logging to be async and non-blocking.
    - Harden security in token, cookie, and middleware interactions.
    - Monitor and test all middleware under load.
    - Introduce caching for computed Outputs.
    - Move persistent data to database.
    - Add validation/sanitization across all parsing and input.
    - Use async I/O.
    - Secure file paths and sanitize content before rendering.
  "Recurrent Issues":
    - Lack of Concurrency controls in async cleanup or context building.
    - Potential injection risks via unvalidated environment variables or input data.
    - Incomplete validation risking malformed data or security exposures.
    - Limited error handling that may cause silent failures or degraded UX.
    - Absence of configuration management consistency for thresholds, paths, and operational parameters.
    - Centralize validation and sanitization.
    - Use distributed cache where persistence is needed.
    - Refactor logging to be async and non-blocking.
    - Harden security in token, cookie, and middleware interactions.
    - Monitor and test all middleware under load.
