Mark Sabandal

Work

Work index for systems I can explain, verify, and extend.

A scannable index of Agentic Engineer and full-stack web developer work: local-first automation, workflow infrastructure, media systems, and client-side tooling. Each entry favors constraints, stack, proof, and verification over broad title labels.

6

Project groups

6

Categories

3

Case-study priorities

Categories

AI Workflow ToolingMedia AutomationLocal Desktop AutomationMinecraft Client SystemsDeveloper Workflow AutomationCompliance Workflow Tooling

Stack Signals

TypeScriptNode.jsCLIClickUp visibilityGitHub workflowNext.jsPrismaPostgresNode workerFFmpegDockerElectron

AI Workflow Tooling

Relayframe

Active local-first CLI

Local-first control plane for turning project intent into durable plans, tickets, sprint execution, review evidence, and approval-gated release work.

Role

Designed and built the TypeScript CLI, local artifact model, sprint orchestration, visibility sync, and approval-gated delivery workflow.

Problem

Agent-led project delivery needs durable execution state, resumable handoffs, review checkpoints, and shared visibility without forcing project truth into chat history or a web-only workflow.

Proof Points

  • Tickets and sprint plans act as the specification, so agents generate against explicit acceptance criteria instead of open-ended chat.
  • Review packets, test-result gates, and approval packets verify agent output before it advances.
  • Next-action and development-loop workflows keep agent work grounded in durable state rather than memory.

Verification

  • CLI workflow runs produce durable status, audit, and handoff artifacts.
  • Tasks move through sprint states with recorded implementation and verification evidence.
  • Agent output is checked through review packets before status advances.
TypeScriptNode.jsCLIClickUp visibilityGitHub workflow
Case study draft

Media Automation

Twitch Content Grabber

Active product build

Pipeline for turning selected Minecraft Twitch VODs into reviewed YouTube Shorts with quality gates before publishing.

Role

Built the app direction around a Next.js dashboard, worker pipeline, review workflow, and local Docker execution path.

Problem

Long VOD review and short-form publishing workflows need repeatable ingestion, scoring, rendering, review, and upload preparation.

Proof Points

  • Review and quality checks stay ahead of publication instead of after upload.
  • Scoring, captions, and metadata are grounded in transcript and correction data.
  • Worker pipeline covers download, transcription, scoring, rendering, and upload preparation.

Verification

  • Pipeline features are verified from real storage and database state.
  • Rendered clips remain review-gated before upload.
  • Metadata is grounded in transcript and correction data.
Next.jsTypeScriptPrismaPostgresNode workerFFmpegDocker
Case study draft

Local Desktop Automation

PhotoDrain and PhotoVault FreeUp

Portfolio case-study candidate

Local desktop assistants for Google Photos backup and cleanup with explicit confirmation before destructive actions.

Role

Designed the local-first assistant model around manual login, Takeout workflows, local validation, dedupe reporting, and explicit cleanup confirmation.

Problem

Photo backup and cleanup work is risky when tools store credentials, skip validation, or automate deletion without clear user control.

Proof Points

  • Manual Google login avoids password storage and security bypass behavior.
  • Local validation and dedupe reporting build reviewed evidence before cleanup.
  • Destructive actions require explicit confirmation on the reviewed plan.

Verification

  • Backup and cleanup states are designed around local evidence.
  • Deletion remains gated behind user confirmation.
  • Public description avoids private account and library details.
ElectronReactTypeScriptLocal storageGoogle Takeout workflow
Case study draft

Minecraft Client Systems

Minecraft Automation Mods

Lab and work-index entry

Fabric and Meteor client-side systems for repetitive game workflows with version targeting, navigation, and safety behavior.

Role

Built and debugged client-side utilities across Animal Hunter Addon, TeeGoals Utility, and LibrarianTradeFinder-style workflows.

Problem

Repetitive in-game tasks need automation that respects client versions, navigation constraints, manual acceptance checks, and safety stops.

Proof Points

  • Animal Hunter Addon targets Minecraft 26.1.2 with Baritone navigation and cleanup behavior.
  • TeeGoals Utility handles repetitive inventory tasks with safety-oriented disconnect behavior.
  • LibrarianTradeFinder work covers villager trade search, profession waits, filtering, and regression debugging.

Verification

  • Version-specific Gradle builds and manual game acceptance checks are part of the workflow.
  • Safety pauses and stop conditions are treated as core behavior.
  • Public copy stays architectural and avoids private server procedures.
JavaFabricMeteor ClientBaritoneMinecraft client modding
Lab context

Developer Workflow Automation

SolarPlus Auriga

Active private control plane

Standalone Codex-first control plane for studying, reproducing, implementing, verifying, reviewing, and handing off SolarPlus Jira tickets.

Role

Designed and built the CLI-first lifecycle, evidence packets, reusable runbooks, agent workflows, and guarded external-action handoffs.

Problem

Ticket-based development across source code and external systems needs durable context, resumable execution, grounded evidence, and explicit approval boundaries.

Proof Points

  • Ticket study, reproduction, implementation, verification, review, and handoff are separated into durable, resumable phases.
  • Runbooks turn repeated troubleshooting into reusable specifications and verification steps.
  • Local and remote evidence stays tied to the ticket lifecycle instead of disappearing into chat history.

Verification

  • Reproduction and verification steps are recorded before implementation begins.
  • Workflow is described at a safe architecture level.
  • Private Jira, source-control, documentation, and server references are withheld.
Node.jsCLI workflowCodexJiraMCP BrowserRunbooks
Lab context

Compliance Workflow Tooling

PCO Desk

Active public pilot

Self-serve Philippine environmental-compliance calendar and evidence organizer, beginning with a free public PCO renewal readiness checker.

Role

Designed and built the product scope, source-backed readiness workflow, privacy boundaries, verification gates, and static Cloudflare Pages delivery path.

Problem

Pollution Control Officers need a clearer way to organize renewal readiness against dated official sources without confusing an organizational tool for legal advice or a government filing service.

Proof Points

  • The public checker uses dated official sources and clearly separates verified guidance from draft content.
  • The first release is free and requires no login, while authentication, document storage, billing, and government integrations remain explicitly deferred.
  • Release checks cover TypeScript, linting, local tests, production builds, browser flows, accessibility, and dependency auditing.

Verification

  • A single local check runs typechecking, linting, tests, and the production build.
  • Playwright release checks exercise representative browser and accessibility flows.
  • Protected-preview, production, rollback, and DNS checks are documented as explicit release gates.
Next.jsTypeScriptCloudflare PagesPlaywrightNode.js