Inspiration

Operational work often becomes fragmented across emails, spreadsheets and personal notes. Ownership becomes unclear, deferred items are forgotten, and teams lose reliable evidence of what changed and who is responsible.

What it does

ControlMatrix is an installable, offline-first application combining:

• Task Management for day-to-day execution
• Project Management for milestone-driven initiatives
• Deferral Management for pending work requiring ownership, evidence and follow-up

Users can assign primary and backup owners; manage status, priority, progress, deadlines and reminders; search and filter records; export CSV; review audit history; and back up or restore local data. A synthetic guest workflow lets judges test the application without creating an account.

Why it is different

• Dual ownership reduces single-person dependency
• Structured deferrals remain visible until regularized
• Hash-chained, tamper-evident audit records preserve changes and reviewer notes
• Offline-first operation keeps core workflows available without an external API
• Follow-up and reminder controls create reviewable drafts but never send automatically

How I built it

The submitted product uses dependency-free HTML, CSS and JavaScript, browser-local persistence, IndexedDB, a service worker and a web app manifest. GitHub deploys the public main branch automatically to Cloudflare Pages. No API key or environment variable is required.

GPT-5.6 and Codex were used during development and review, not as an unverified runtime dependency. They helped analyze the imported codebase, improve the synthetic judge workflow, identify security and reliability risks, prevent CSV-formula injection, narrow service-worker caching, remove unsupported claims, test the static application and prepare submission evidence. The developer reviewed and authorized the resulting changes.

An experimental live GPT brief was evaluated and removed from the final product because a successful production response was not established. The submitted application does not claim live GPT generation.

Primary Codex /feedback Session ID: 6a5d0af0-d5bc-83ee-97f5-e4de896992f8

Final Codex audit task ID: 019f800b-8078-7a82-9f21-cdd1548cad8e

Build Week repository evidence: c04cabe..main

Challenges

The main challenge was preserving a useful offline workflow while making claims conservative and verifiable. The imported package did not include a pre-Build-Week Git baseline, so the submission distinguishes the pre-existing foundation from the dated public integration work instead of fabricating timing or authorship.

Accomplishments

• Working task, project and deferral management
• Primary and backup ownership
• Priority, deadline, progress and overdue monitoring
• Search, filters, dashboard, calendar, CSV export and backup/restore
• Field-level and master audit evidence
• Synthetic no-signup judge workflow
• Offline PWA support
• Responsive desktop and mobile layout
• Public GitHub repository with MIT license

What I learned

Reliable operational execution depends on ownership, accountability, evidence, escalation and structured closure—not merely maintaining a task list. AI-assisted development also requires careful human review and evidence-backed claims.

What's next

Future work includes server-enforced identity, secure multi-user synchronization, enterprise SSO, attachments, conflict resolution, workload analytics and formal penetration testing.

Try it

Open ControlMatrix and choose Start judge demo — no signup. The sample workspace contains synthetic data only. Source and verification instructions are in the public GitHub repository.

Built With

• chatgpt