codex-update-spec

codex-update-spec is a skill for Claude Code, Codex from yinanli1917-cloud/searching-apple-notes. It costs 23 tokens per session (174 once invoked), scanned A, original, MIT.

A procedure for keeping project specifications and guidance documents up to date after changes to how a project works. It covers project behaviour, shared development rules, and agent workflow documents.

In plain words
What is it for?
Use it when a change affects architecture, workflow, conventions, or recurring practices, then run focused checks.
Why use it?
It prevents durable rules and lessons from being lost after implementation changes.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also installed under .codex/. Also seen: mentions AGENTS.md; mentions Codex.

Part of the searching-apple-notes plugin — 9 skills shipped together

Good fit Use it when a change affects architecture, workflow, conventions, or recurring practices, then run focused checks.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec
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 yinanli1917-cloud/searching-apple-notes --skill codex-update-spec
Clone the repo
git clone --depth 1 https://github.com/yinanli1917-cloud/searching-apple-notes

Made for: Claude Code, Codex.

Or install searching-apple-notes, the plugin that ships this one along with the rest of its 9 skills.

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 codex-update-spec

README.md
[![agentmods](https://agentmods.dev/badge/skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec/github.svg)](https://agentmods.dev/skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec)
Your own site
<a href="https://agentmods.dev/skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec"><img src="https://agentmods.dev/badge/skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec/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 codex-update-spec

Your own site · 80×15
<a href="https://agentmods.dev/skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec"><img src="https://agentmods.dev/badge/skills/yinanli1917-cloud/searching-apple-notes/codex-update-spec.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 174 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 $0.00023 $0.00174
Opus 5 $0.00012 $0.00087
Sonnet 5 $0.00005 $0.00035
Haiku 4.5 $0.00002 $0.00017

Measured 9d ago against content hash f3be3a3944de, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

codex-update-spec 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.

.codex/skills/codex-update-spec/SKILL.md · 22 lines

What it actually says

Update Spec

Use this when a change creates durable behavior or a recurring rule.

  1. Identify the affected spec layer:

    • project-level behavior -> .codex/spec/project/
    • shared development guidance -> .codex/spec/guides/
    • harness lifecycle behavior -> AGENTS.md, README.md, PRD.md, global/AGENTS.md, or templates/workflow.md
  2. Update the smallest relevant spec/doc.

  3. If the active task changes durable harness behavior, update the relevant spec/doc and mention the update in verification. If no spec update is needed, state why in the verification summary.

  4. Re-run focused verification.

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 · 22 lines · 23 tokens per session scan A f3be3a3944de

Subscribe to this mod's changes

codex-update-spec is a skill published in the GitHub repository yinanli1917-cloud/searching-apple-notes (2 stars, last pushed 1mo ago), licensed MIT. It adds 23 tokens to every session and 174 once invoked, about $0.0001 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.

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