Jjidonglabinplzai.hashnode.dev·Apr 30 · 6 min readSymphony: Why OpenAI's PRs Jumped 500% in 3 WeeksOpenAI's internal teams landed five times more pull requests in the three weeks after they switched on Symphony. Not 50% more. Five hundred percent more, on the same headcount, in 21 days. That single number is why I cloned the repo the day it droppe...00
Jjidonglabinplzai.hashnode.dev·Apr 30 · 6 min readGPT Image 2 Inside Codex: My New Frontend WorkflowLast quarter I shipped a single landing hero with 47 image iterations across four tools. This week I shipped three landing pages, two onboarding flows, and a full pricing section in the same tool I write code in. The thing that broke the loop is not ...00
Jjidonglabinplzai.hashnode.dev·Apr 30 · 7 min readGPT-5.5-Codex vs 5.3: A 200-Task Bench ResultOn a 200-task bench split across a TypeScript SaaS and a Python ML pipeline, GPT-5.5-Codex closed 81% of tasks unattended versus 67% for GPT-5.3-Codex, and burned 38% fewer reasoning tokens on the multi-step ones. But on trivial single-file edits it ...00
Jjidonglabinplzai.hashnode.dev·Apr 30 · 7 min readCodex Is No Longer a CLI. Embed It in Your App.The interesting thing about the April 2026 Codex update isn't computer use. It isn't the model bump either. The real story is that Codex stopped being a CLI. The Codex App Server is the underlying agent harness OpenAI just made public — the same engi...00
Jjidonglabinplzai.hashnode.dev·Apr 30 · 7 min readI Gave Codex My Mouse for a Day. Here's What Broke.At 9:14 a.m. on a Tuesday I watched my cursor drift across the menu bar without me touching the trackpad. It hovered over the Numbers icon, paused, then double-clicked. A spreadsheet I had not opened in three weeks slid into focus, and a new column a...00
