reasoning-budget

reasoning-budget is a skill for Claude Code, Codex from wangsiyi7/codex-reasoning-reactor. It costs 39 tokens per session (389 once invoked), scanned A, original, MIT.

A guide for estimating, comparing, visualizing, or calibrating Codex model and reasoning budgets. It covers the Luna, Terra, and Sol models and several reasoning levels.

In plain words
What is it for?
Use it when deciding how much reasoning to allocate to a task or when recording an actual outcome for calibration.
Why use it?
It helps choose a model or reasoning level while considering task size, speed, and quota trade-offs. These are local estimates, not billing guarantees.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Codex.

Good fit Use it when deciding how much reasoning to allocate to a task or when recording an actual outcome for calibration.

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Install with agentmods
npx agentmods add skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add wangsiyi7/codex-reasoning-reactor --skill reasoning-budget
Clone the repo
git clone --depth 1 https://github.com/wangsiyi7/codex-reasoning-reactor

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for reasoning-budget

README.md
[![agentmods](https://agentmods.dev/badge/skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget/github.svg)](https://agentmods.dev/skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget)
Your own site
<a href="https://agentmods.dev/skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget"><img src="https://agentmods.dev/badge/skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for reasoning-budget

Your own site · 80×15
<a href="https://agentmods.dev/skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget"><img src="https://agentmods.dev/badge/skills/wangsiyi7/codex-reasoning-reactor/reasoning-budget.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 389 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00039 $0.00389
Opus 5 $0.00019 $0.00195
Sonnet 5 $0.00008 $0.00078
Haiku 4.5 $0.00004 $0.00039

Measured 9d ago against content hash f6baaf120b67, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

reasoning-budget scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/reasoning-budget/skills/reasoning-budget/SKILL.md · 31 lines

What it actually says

Reasoning Budget

Use this skill when the user asks which Codex model or reasoning level to use, asks about speed or quota trade-offs, or wants the interactive reasoning-budget panel.

Workflow

  1. Summarize the task in one concise sentence without inventing scope.
  2. Infer scope conservatively:
    • tiny: one narrow answer or edit.
    • small: a focused change in a few files.
    • medium: a feature, diagnosis, or multi-step analysis.
    • large: broad migration, research, or cross-project work.
  3. Call estimate_reasoning_budget for analysis or show_reasoning_budget when the user wants to compare, see, choose, or interact with the budget.
  4. Explain that time and quota are local estimates, not OpenAI billing or a guarantee.
  5. Treat Ultra as multi-agent parallel work, not merely a stronger single-agent reasoning level. Prefer Max when a hard task is not meaningfully divisible.
  6. Do not claim the plugin changed Codex's native model picker. The separate local native adapter owns that unsupported host-UI bridge.
  7. Call record_reasoning_outcome only when the user explicitly asks to record/calibrate an actual outcome, and pass consent: true. The ledger intentionally does not retain the task summary.

Model guidance

  • Luna: clear, repeatable, high-volume tasks.
  • Terra: everyday engineering and balanced tool use.
  • Sol: ambiguous, complex, high-value work requiring judgment and polish.

When recommending, state the chosen model and level first, then give estimated time, relative quota, and the main trade-off in one compact paragraph.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 9d ago First seen · 31 lines · 39 tokens per session scan A f6baaf120b67

Subscribe to this mod's changes

reasoning-budget is a skill published in the GitHub repository wangsiyi7/codex-reasoning-reactor (0 stars, last pushed 1mo ago), licensed MIT. It adds 39 tokens to every session and 389 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.