[ SECTION // 04 // BLOG // INDEX ]

BLOG.

Notes from building — dev, AI and hosting. What I ship, how it works and why.

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PROJECTS

Four levels of HTML, one JSON, and a Volvo: parsing a parts catalog with no API

Every car brand structures its parts catalog navigation differently. Volvo goes four levels deep, Nissan has a two-phase BOM. Here's the parser architecture that handles all of it without turning into a mess.
AUTODILYWEB SCRAPINGPARSERNEXT.JSCASE STUDY
2026-08-02
4 MIN
01
CORESYNTH

When AI Model Prices Change Every Week

CoreSynth now syncs AI model prices automatically from the upstream catalog. It doesn't just overwrite numbers — it guards against price spikes, writes an audit trail, and separates estimates from reality.
CORESYNTHAIPRICINGAUTOMATIONBILLING
2026-08-01
3 MIN
02
PROJECTS

Login events don't belong in the audit log

Why login history in the J+P Autodíly admin panel gets its own table instead of sharing the audit log — and why the login record must never touch the critical path.
autodilyadminsecuritydata-modelnextjs
2026-07-28
3 MIN
03
PROJECTS

Product feeds: getting a bike shop's catalog onto shopping comparators

Why having an e-shop isn't enough — and how a single generated XML feed puts a small bike shop's catalog in front of shopping comparators, twice a day, with no manual work.
nextjseshopfeedmedusacase-study
2026-07-26
3 MIN
04
PROJECTS

Admin Filters Without a Filter Button — URL as State

Why we removed the Filter button from the J+P Autodíly admin panel and let filters write directly to the URL. Debounce, server-rendered listings and progressive enhancement in one shared component.
nextjsuxautodilyadminurl-state
2026-07-22
3 MIN
05
PROJECTS

Dispatch Board: Ship Orders from the Warehouse in One Click

Why a delivery note per order wasn't enough — and how a single page grouped by delivery routes, one button per route, and an order timeline transformed warehouse operations.
nextjseshopautodilyworkflowcase-study
2026-07-17
5 MIN
06
PROJECTS

Live admin panel without F5: Server-Sent Events in a B2B e-commerce shop

Why 'just refresh the page' doesn't cut it when an admin monitors orders in real time — and how a single SSE pipe with a fingerprint replaced ten polling queries.
nextjseshopautodilyssebackendcase-study
2026-07-16
4 MIN
07
PROJECTS

Barcodes, Camera and OCR: Receiving Goods by Phone in a B2B Auto Parts Shop

Why typing part numbers on a phone keyboard while standing at a pallet is the wrong workflow — and how a mix of native scanning, WebAssembly and server-side OCR turns a phone into a receiving terminal.
nextjseshopautodilybarcodeocrcase-study
2026-07-15
3 MIN
08
PROJECTS

Invoicing, State Machines and VAT: What a Proper Billing System Looks Like in a B2B E-Shop

Why storing a few numbers in a database isn't enough — document state transitions, correct VAT splitting from gross prices, and a unified outstanding balance for both admin and customer.
nextjseshopbillingautodilycase-study
2026-07-14
3 MIN
09
CORESYNTH

Granular Tool Permissions for AI Agents

An AI agent needs access to tools — but not all tools are equally risky. Orca introduces per-tool permissions with a YOLO mode, giving each tool its own trust level.
ORCAAISECURITYPERMISSIONSAGENTS
2026-07-08
3 MIN
10
PROJECTS

When a hair salon needs a salon website, not a SaaS template

Complete redesign of the Sarah Hair Salon homepage — from a generic SaaS template to an editorial experience that actually looks like a salon.
SARAH HAIRREDESIGNNEXT.JSUXEDITORIALSALON
2026-07-02
3 MIN
11
PROJECTS

Language detection by location — zero-server static site

How I added automatic language switching to my portfolio based on timezone and browser language — entirely client-side, no API, no flicker.
I18NASTROSTATIC SITEJAVASCRIPT
2026-07-01
2 MIN
12
ORCA

Orca: parallel DAG instead of a sequential chain — more agents, less waiting

Mission planning in Orca no longer forces a sequential pipeline. The planner now builds a dependency graph where independent phases run in parallel and actually use the available agent capacity.
ORCAAIDAGPARALLELISMAGENTSPLANNING
2026-06-27
3 MIN
13
ORCA

Push notifications with inline actions — Orca on your phone

Orca now sends web push notifications to your phone. When an agent needs your input, a phase needs approval, or a mission finishes, you get a notification with action buttons right in it.
ORCAAIPWAPUSHNOTIFICATIONSMOBILE
2026-06-26
4 MIN
14
ORCA

Orca — per-task PR workflow control

Every task in Orca can now have its own GitHub PR setting: default, on, or off. Two bugs were also fixed that allowed shipping a partial PR before the mission was complete.
ORCAAIAGENTSGITHUBPRWORKFLOW
2026-06-25
2 MIN
15
SARAH HAIR

Calendar feeds for stylists — salon bookings straight in Google Calendar

Every stylist now gets her own ICS link for bookings. Connect it to Google Calendar, Apple Calendar, or Outlook and you'll see all your appointments without logging into the admin panel.
SARAH HAIRBOOKINGSICSCALENDARSALONOPS
2026-06-18
2 MIN
16
CORESYNTH

Prompt caching in Alex: from 0% to 19% hit rate

Alex generates massive system prompts — hundreds of thousands of tokens. OpenAI automatic prefix caching is free, but only when the prefix stays stable. Here's how a single timestamp bug was killing the cache, and how we fixed it.
AIOPENAIPROMPT CACHINGCORESYNTHALEXPERFORMANCELLM
2026-06-17
3 MIN
17
INSIGHTS

One memory for AI agents: Claude Code, Codex and Hermes in the same context

AI tools are powerful, but each one usually lives in its own thread. So I built a shared memory layer that connects Claude Code, Codex and Hermes into one long-term context.
AIMEMORYAGENTSCLAUDE CODECODEXHERMES
2026-06-15
5 MIN
18
CORESYNTH

Making AI billing transparent: progress bars, token breakdown, and a user-cost modal

I stopped showing users raw numbers and gave them progress bars, a clean token breakdown, and a modal with cost projections instead. Here's how and why.
AIUXCORESYNTHBILLINGTRANSPARENCYPROGRESS
2026-06-15
4 MIN