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AI coding rules

Agents go wrong at every stage: rules for AGENTS.md, model switches, long tasks, pages and launch.

10 tips56K saves on X, as of

  • Clear up ambiguity first, change only what the task needs, and ask before adding a dependency.

    Rules Claude Code, Codex

    Picked

    2.1K saves

    Scope Guard: AGENTS.md rules for small tasks

    Codebase + Review

  • Cut taglines, helper text and secondary labels; if a screen needs them, fix the layout.

    Rules Claude Code, Codex

    15K saves

    Two AGENTS.md lines: less text, UX/DX/AX

    Design + Codebase

  • Switched to Opus 5.5: delete “think carefully”, “take a deep breath”; it decides how much to think.

    Rules Claude Code

    2.1K saves

    Think-carefully cleanup for Opus 5.5

    Models and cost + Codebase

  • Switched to Astra: it reviews AGENTS.md and skills against OpenAI’s guide, recommendations first.

    Rules Codex

    5K saves

    Old-rules review for Astra, by OpenAI’s guide

    Models and cost + Codebase

  • Start effort at medium, set a model on search and test subagents, and cut unused MCP servers.

    Prompt Claude Code

    2.2K saves

    Setup review by the Opus 5.5 cost guide

    Models and cost

  • Opus 5.5 usually calls Fable in before a plan, when an error repeats and before saying done.

    Helper agents Claude Code

    5.5K saves

    /advisor: Opus 5.5 works, Fable on call

    Models and cost + Review

  • Tasks over 5 steps or 30 minutes get a dashboard first: progress, what’s stuck, questions for you.

    Helper agents Claude Code

    9.8K saves

    Progress dashboard subagent for long tasks

    Long runs

  • Codex has image generation built in: it reimagines the page as an image, then implements it.

  • 5 subagents check design, mobile, states and user flows; Opus 5.5 fixes them in one pass.

    Prompt Claude Code

    6.9K saves

    Pre-launch site check: 20 page items

    Launch + Design

  • 4 subagents find what slows the site; Lighthouse medians before and after, no features cut.

    Prompt Claude Code

    3.2K saves

    Pre-launch check: 20 things that slow a site

    Launch + Review

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