6 mins read
Vault
Building albertoduran.com
How albertoduran.com is built as a static-first Astro platform that compiles MDX, diagrams, and charts into inspectable files.
14 mins read
AWS serverless video on demand workflow
A practical look at a serverless AWS video pipeline that turns private recordings into HLS playback through MediaConvert, S3, Lambda, EventBridge, and CloudFront.
11 mins read
Is Oracle Stock Undervalued?
Oracle trades at a deep discount to its intrinsic value despite high debt and negative free cash flow from AI infrastructure investments
6 mins read
Three projects, one pipeline
How three standalone tools, the Equity Valuation Engine, Equilyze, and Pressroom, turn a stock ticker into a finished article.
12 mins read
Run LangChain with Ollama locally
Build a local LangChain chat project with Ollama, from environment setup to a working terminal conversation loop.
10 mins read
Vault
Equity valuation without the black box
Years of conservative investing led me to build a Python engine for studying company valuations with visible assumptions, model checks, and limits.
11 mins read
Vault
Building a price tracker that expects failure
One missed bargain became MLScraper, a Python service that watches four stores, preserves price history, and treats unreliable pages with care.
16 mins read
Automating cloud processor benchmarks with SiliconBoutique
A unified benchmarking pipeline that deploys Online Boutique locally, on GCP, and on AWS, collects metrics, persists cloud history to BigQuery, and serves results in Grafana and a portable HTML dashboard.
30 mins read
Designing an AI ops agent from the ground up
A spec-driven blueprint for building infrastructure intelligence with LangGraph, Prometheus, and Claude Sonnet. Learn how seven markdown files become a working AI agent.
21 mins read
From zero to live GCP benchmarks with SiliconBoutique
A complete walkthrough for setting up a Google Cloud account, configuring GitHub Actions OIDC auth, and running your first automated benchmark with SiliconBoutique.
9 mins read
Vault
A writer's platform
An academic writing platform introduced me to software architecture and placed second among 40 projects after I built it on my own.
3 mins readIn Building albertoduran.com
The publication compiler
Writing an article is really compiling one. The path a candidate MDX file takes from schema, through policy and routing, to a rendered page.
3 mins readIn Building albertoduran.com
The schema, and what it refuses
The live Zod schema every publication satisfies, the glob that hides partials, and the one field the schema accepts but the page never shows.
4 mins readIn Building albertoduran.com
Code fences as an authoring API
Why an author writes a fenced block instead of importing a component, how parity is guaranteed, and when to reach for the component after all.
4 mins readIn Building albertoduran.com
Drafts, vaults, order, and read time
The manifest is where publication policy lives. Draft scoping, the invariants a vault must satisfy, image inheritance, ordering, and the read-time formula.
4 mins readIn Building albertoduran.com
Satteri, the component map, and highlighting
The Markdown processor, why the fence integration registers before mdx, how Markdown elements become components, and how code gets two themes.
4 mins readIn Building albertoduran.com
Static paths and the article shell
How a catch-all route turns published entries into a finite list of pages, and the shell of sidebars, dock, and overlays that surrounds every article.
5 mins readIn Building albertoduran.com
The packages behind the site
Why albertoduran stopped owning its UI kit and render engines, and how it now consumes them as two versioned packages.
6 mins readIn Building albertoduran.com
What extraction actually cost
The honest counterweight to the extraction story: duplicated CSS, git-ref versioning, source-shipped compilation, and two bugs only the real build found.
6 mins readIn Building albertoduran.com
bloomwright-mdx, extraction and glue
The integration that turns code fences into rendered output, why it registers before mdx, and why it no longer renders Mermaid itself.
7 mins readIn Building albertoduran.com
The three inversions
Extraction worked because three decisions moved from the packages to the app: what publishes, where bytes are cached, and who renders.
7 mins readIn Building albertoduran.com
bloomwright-ui as a component kit
The four component families, the pure logic layer that keeps fences and components identical, and why icons ship as props.
6 mins readIn Building albertoduran.com
bloomwright-ui as a render core
How a package that was meant to stay a dependency-free leaf deliberately reversed course and absorbed build-time rendering.
3 mins readIn Building albertoduran.com
The visual system after extraction
What the app still owns of its look, what bloomwright-ui now owns, and where the line between them falls after the UI kit moved out.
5 mins readIn Building albertoduran.com
Live data at build time
Consuming an unstable third-party source during the build, validating it like any other content, and letting the browser finish the one job the build cannot.
4 mins readIn Building albertoduran.com
The ordered stylesheet and its duplication
One global stylesheet imported in ten numbered stages, the DaisyUI parts it opts into, and the duplicated partials the extraction left behind.
4 mins readIn Building albertoduran.com
Project pages and the profile
The surfaces outside the journal: project landing pages that act as vault front doors, and the recruiter-facing profile built from typed data.
4 mins readIn Building albertoduran.com
The runtime boundary, split across repos
Every browser enhancement improves a baseline that already renders. The custom elements that do it now ship from two repositories, and why failures stay local.
4 mins readIn Building albertoduran.com
Moving through an article
The app-owned reading experience: heading tracking with sticky offsets and page edges, the vault explorer tree, and previous-next pagination.
4 mins readIn Building albertoduran.com
Themes, tokens, and three deadlines
DaisyUI 5 OKLCH themes and semantic tokens, and the three separate moments a theme has to be correct, each owned by a different layer.
3 mins readIn Building albertoduran.com
Four repositories, one artifact
The system behind the site: what each repository owns, what is left in the app, and the single static artifact they all serve.
4 mins readIn Building albertoduran.com
From dist to the reader
How the static build reaches Cloudflare Workers Static Assets, the caching and security headers it ships, and where configuration ends and platform capability begins.
4 mins readIn Building albertoduran.com
What is left in src after extraction
The app got smaller when the packages left. A tour of what remains in src, and one publication change traced through the boundaries that stayed.
4 mins readIn Building albertoduran.com
Working across four repositories
The Node 22 devcontainer, how github dependencies resolve, and what a source-shipped package asks of the workspace that consumes it.
3 mins readIn Building albertoduran.com
Nothing renders in the reader's browser
How the site turns diagrams and charts into static SVG at build time, and the rule that decides which tool draws what.
8 mins readIn Building albertoduran.com
The published chart catalog
Every chart family rendered in a real article, with a note on the question each one answers, so an author can choose by looking at output.
4 mins readIn Building albertoduran.com
Charts as static SVG, with optional life
How an ECharts options object becomes a server-rendered SVG at build time, how it is cached and emitted, and the five ways it can wake up.
4 mins readIn Building albertoduran.com
When the renderer is unreachable
The provider chain that keeps a render outage from ever crashing a build, and the fixture mode that keeps tests offline.
4 mins readIn Building albertoduran.com
The Mermaid pipeline, scan to emit
The build integration that finds diagrams, batches them, checks a cache, renders the misses, and writes themed SVG assets.
5 mins readIn Building albertoduran.com
The render service, end to end
The full round trip from the build to the Cloudflare Worker and back, what happens inside while the build waits, and two live mismatches.
5 mins readIn Building albertoduran.com
Making a raw SVG safe and themeable
The HAST pass that strips scripts, rewrites ids, scopes CSS, and merges light and dark into one asset, plus the palette that survives the network.
4 mins readIn Building albertoduran.com
Why rendering lives outside the build
The site deploys to Cloudflare, so why is there a second Cloudflare thing? The four-part answer, and the honest counterweights.
10 mins readIn Equity valuation without the black box
Assumptions, scenarios, and honest uncertainty
Learn how historical signals, configured limits, and scenario policy become Bear, Base, and Bull paths without pretending to predict.
11 mins readIn Equity valuation without the black box
How to choose a valuation model
Match DCF, multiples, dividends, assets, and reverse DCF to the financial shape of a business before trusting any estimate.
11 mins readIn Equity valuation without the black box
DCF and reverse DCF, step by step
Build a discounted cash-flow valuation, inspect its sensitivity, and reverse the calculation to understand market-implied expectations.
10 mins readIn Equity valuation without the black box
Extending the engine without breaking its contract
Trace the architecture behind data fields, diagnostics, suitability, valuation managers, CLI output, JSON, and tests before adding features.
11 mins readIn Equity valuation without the black box
Your first valuation run
Install the equity valuation engine, run one ticker, and learn to read suitability checks, scenarios, skipped models, and JSON.
11 mins readIn Equity valuation without the black box
Six other ways to value a company
Compare P/E, EV/EBITDA, P/S, ROE, DDM, and NAV through independent examples, and learn why every model needs its own guardrails.
11 mins readIn Equity valuation without the black box
How to read a valuation result
Interpret scenario rows, skipped models, the equal-weight composite, model dispersion, and JSON without turning output into a target price.
10 mins readIn Equity valuation without the black box
From market data to usable metrics
Follow provider data into StockMetrics, learn what missing-value diagnostics preserve, and see which gaps can still mislead a model.
12 mins readIn Building a price tracker that expects failure
Your first MLScraper price watch
Follow one illustrative Amazon Mexico watch from YAML and URL preview to saved product history, runtime health, and a later price alert.
10 mins readIn Building a price tracker that expects failure
When a store blocks the scraper
Learn how MLScraper chooses HTTP or browser fetching, protects history after incomplete pages, and slows the right scope after failures.
11 mins readIn Building a price tracker that expects failure
How a YAML job becomes a store URL
Learn how MLScraper turns stable job identity and provider options into validated store routes, predictable storage paths, and safe previews.
10 mins readIn Building a price tracker that expects failure
Operating MLScraper and adding a store
Run MLScraper locally, diagnose health and saved state, exercise its offline tests, and extend the provider contract without runtime leaks.
10 mins readIn Building a price tracker that expects failure
How a product becomes price history
Follow one stable product identifier through updates, temporary absence, recovery, JSON persistence, and MLScraper price-drop alerts.
10 mins readIn Building a price tracker that expects failure
Why every store needs its own adapter
Compare four ecommerce page formats and learn how MLScraper isolates store-specific URLs and parsing behind one product contract.
11 mins readIn Building a price tracker that expects failure
What happens during one scrape cycle
See how FastAPI starts MLScraper, provider loops share concurrency safely, and health turns background work into observable state.
11 mins readIn A writer's platform
Engineering the Sin Pluma React frontend
A detailed look at how Sin Pluma's React SPA is structured: Redux state, HOC-based auth guards, Axios interceptors, Slate.js rich text editor, and backend service integration patterns.
8 mins readIn A writer's platform
How Sin Pluma's architecture fits together
A detailed walkthrough of every service in the Sin Pluma system, how Docker networks isolate them, the data flows behind key operations, and the architectural strengths and constraints.
10 mins readIn A writer's platform
Designing the Sin Pluma Flask REST API
How Sin Pluma's Flask API is structured: the app factory pattern, blueprint organization, full endpoint inventory, Marshmallow validation, and integrations with MySQL, Redis, and MinIO.
10 mins readIn A writer's platform
High availability with MySQL InnoDB Cluster in Sin Pluma
How Sin Pluma bootstraps a three-node MySQL InnoDB Cluster, handles automatic failover, manages the schema, and what production hardening looks like beyond the demo environment.
10 mins readIn A writer's platform
JWT in practice: access, refresh, and revocation in Sin Pluma
A detailed walkthrough of Sin Pluma's JWT implementation: token structure, full lifecycle, the Redis blacklist, the Axios refresh queue, storage trade-offs, and security best practices.