Thread

Getting the most out of Opus 5.5 in Claude and Claude Code

232 points · 156 comments · saikatsg

rdli · 1791060574 · focus · HN ↗
It’s a really good model. Over the past few days, I give Opus some general directives to basically speed up our CI, and telling it I care both about billing minutes and wall clock time. I told it to create a plan after analyzing everything in our CI, run the plan by a Fable subagent, and then focus on low-risk, high-reward changes.
9 hours later, I had 12 PRs ready to be merged, and the net result is CI time has dropped from ~10 minutes to ~4 minutes, and billing minutes have dropped around 60%. Less than an hour of my attention.
1. AnotherGoodName · 1791065400 · focus · HN ↗
  To back this up we have a discord chat for the board game terraforming mars where the agent takes input and vibe codes an open source implementation of the game.
  <a href="https://tfmbot.com" rel="nofollow">https://tfmbot.com is the link (discord and source links on the splash screen).
  The results are fucking incredible to the point where people in discord are stating "I'm surprised this is working so well". I am too.
  I feel like there's a group online that missed the boat. Anything negative towards AI capabilities is still upvoted but I've been in the industry for over 25years, highly respected and can't fathom the "AI dumb lololol" type of comments i see on HN. AI is superseeding all other ways to develop.
  1. TeMPOraL · 1791066964 · focus · HN ↗
    I'm restoring a game I played as a kid, that I couldn't reliably get to even start on modern Windows. The skill and speed with which Opus 5.5 got it running, while patching a bunch of bugs in the binary along the way (only some of them I knew about), has my jaw still on the floor - and few hours in, I already have whole campaign mapped out as state machine graph, and we're upscaling graphics now.

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