Working Notes on Agent Systems/Brad Zhang

@teach_fireworks / X longform

If you are a heavy Codex user, do you always have request limit on a few days every month?

If you are a heavy Codex user, do you always have request limit on a few days every month? Starting from this month, the 100-dollar Pro user quota has returned to the regular 5X...

June 1, 2026 · 2 min read

If you are a heavy Codex user, do you always have request limit on a few days every month?
Figure 1 / source image

If you are a heavy Codex user, do you always have request limit on a few days every month? Starting from this month, the 100-dollar Pro user quota has returned to the regular 5X, use it and cherish it, haha. Share a good strategy. Add this paragraph to your agent.md, which will allocate different models in the main agent session. Don’t write readme with

  • 5: ``` # Subagent Routing Before executing any task, classify it: - architecture / complex refactor / root cause analysis -> use senior-reviewer or planner with gpt-5.5 - codebase exploration / file search / dependency tracing -> use explorer-agen t with gpt-5.4-mini or gpt-5.3-codex-spark - normal implementation / API integration / bug fix -> use coder-agent with gpt-5.4 or gpt-5.3-codex - tests / scripts / CI / YAML / SQL -> use coder-agent with gpt-5.4 - docs / PR description / changelog / commit message -> use docs-agent with gpt-5.4-mini The orchestrator should not use the strongest model for simple execution. It should delegate, then verify. ``` Core principles: Pathfinding: cheap model Coding: mid-range model Review: strong model Documentation: cheap model Strong model: GPT-5.5 / GPT-5.5 Pro is responsible for judging tasks, splitting, and acceptance, and does not write a lot of code directly Pathfinding: GPT-5.4-mini / GPT-5.3-Codex-Spark is responsible for scanning code, finding files, and reading call links coding: GPT
  • 5 Medium/GPT-5.4 / GPT-5.3-Codex Spark is responsible for general implementation, testing, and scripting. Review: GPT-5.5 is responsible for architectural risks, diff review, and boundary conditions. Documentation: GPT-5.4-mini is responsible for READ. ME, PR, changelog, commit message Real waste of credits: ❌ “Look at the entire Repo” ❌ “Analyze this project” ❌ Open a dozen MCPs ❌ Chat for two days in one session ❌ Let 5.5 Pro write README ❌ Let 5.5 Pro change CSS

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FORMATTOPICCAPABILITYMARKETcoverscoverscoverssignalssignalssignalsFORMATarticle featureTOPICagentsTOPICtechnical distributionTOPICretrievalCAPABILITYagent workflowCAPABILITYdeveloper toolingCAPABILITYtechnical writing
Mermaid outline
flowchart LR
  format-article["article feature"]
  topic-agents["agents"]
  topic-technical-distribution["technical distribution"]
  topic-retrieval["retrieval"]
  capability-agent-workflow["agent workflow"]
  capability-developer-tooling["developer tooling"]
  capability-technical-writing["technical writing"]
  format-article -->|covers| topic-agents
  format-article -->|covers| topic-technical-distribution
  format-article -->|covers| topic-retrieval
  format-article -->|signals| capability-agent-workflow
  format-article -->|signals| capability-developer-tooling
  format-article -->|signals| capability-technical-writing

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If you are a heavy Codex user, do you always have request limit on a few days every m...THESISIf you are a heavyCodex user, do youalways have requestlimit on a few daysSIGNALIf you are a heavyCodex user, do youalways have requestlimit on a few daysOPERATOR5.5: ``` # SubagentRouting Beforeexecuting any task,classify it: -IMPLICATION5.5 Medium/GPT-5.4 /GPT-5.3-Codex Spark isresponsible forgeneral
Mermaid outline
flowchart LR
  thesis["If you are a heavy Codex user, do you always have request limit on a few days every month? Starting from th..."]
  signal["If you are a heavy Codex user, do you always have request limit on a few days every month? Starting from th..."]
  operator["5.5: ``` # Subagent Routing Before executing any task, classify it: - architecture / complex refactor / roo..."]
  implication["5.5 Medium/GPT-5.4 / GPT-5.3-Codex Spark is responsible for general implementation, testing, and scripting...."]
  thesis -->|frames| signal
  signal -->|develops| operator
  operator -->|lands in| implication

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