as-of-or-stop

as-of-or-stop is a skill for Claude Code, Codex from arunveersingh/ai. It costs 106 tokens per session (885 once invoked), scanned A, original, Apache-2.0.

A practice for checking time-sensitive claims against today's date, installed dependency versions, and a live source. It tells an agent to label dated evidence, mark memory-only claims, and stop when current information cannot be verified.

In plain words
What is it for?
It is for dependency updates, security checks, version selection, and any task involving facts that change over time. It helps audit output for missing dates, sources, and lockfile evidence.
Why use it?
It prevents stale versions, prices, limits, API details, and security claims from being treated as current. It also reduces the chance of adding an old or vulnerable dependency based only on remembered information.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for dependency updates, security checks, version selection, and any task involving facts that change over time. It helps audit output for missing dates, sources, and lockfile evidence.

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Install with agentmods
npx agentmods add skills/arunveersingh/ai/day-07-as-of-or-stop
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 arunveersingh/ai --skill day-07-as-of-or-stop
Clone the repo
git clone --depth 1 https://github.com/arunveersingh/ai

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 as-of-or-stop

README.md
[![agentmods](https://agentmods.dev/badge/skills/arunveersingh/ai/day-07-as-of-or-stop/github.svg)](https://agentmods.dev/skills/arunveersingh/ai/day-07-as-of-or-stop)
Your own site
<a href="https://agentmods.dev/skills/arunveersingh/ai/day-07-as-of-or-stop"><img src="https://agentmods.dev/badge/skills/arunveersingh/ai/day-07-as-of-or-stop/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 as-of-or-stop

Your own site · 80×15
<a href="https://agentmods.dev/skills/arunveersingh/ai/day-07-as-of-or-stop"><img src="https://agentmods.dev/badge/skills/arunveersingh/ai/day-07-as-of-or-stop.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 106 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 885 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 $0.00106 $0.00885
Opus 5.5 $0.00042 $0.00354
Sonnet 5.5 $0.00021 $0.00177
Haiku 4.5 $0.00011 $0.00089

Measured 16d ago against content hash b9f81badd52a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

as-of-or-stop 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 16d 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.

courses/make-ai-fail-safely/practice/day-07-as-of-or-stop/SKILL.md · 45 lines

How it starts

The opening of the file, as written. The whole thing — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.

As of, or stop

You ask your agent to pin the latest requests: lock it to one exact version so every install gets the same code. It writes requests==2.31.0 (latest stable). That was true in 2023. On 9 Oct 2026 the newest is 2.34.2, and 2.31.0 has three known advisories. Nothing errors and the tests pass.

Known then is not true now. The fix has two parts. Ask: anything that can change needs a date and a live source, memory alone means stop, and versions come from the package manager. Verify: flag undated claims, and let an audit against today's advisory data decide "safe."

Paste Part A into the agent's standing instructions or before the task. Do Part B yourself. Fill in the brackets.

Part A — Ask (paste and adapt)

Today is [YYYY-MM-DD]. Installed versions: [paste lockfile or
"pip freeze"].
1. For anything that can change over time (versions, prices,
   limits, API behavior, people in roles), write:
   as of <date>, source: <tool output or URL>
2. If your only source is training data, write FROM MEMORY.
   Don't act on it.
3. If you have a lookup tool, run it and quote the output.
   If not, write STOPPED: no live source. You may propose
   one lookup.
4. Add dependencies with the package manager. Report the version
   it installed. Never type a version number from memory.

Adapting it: for npm, Maven, or Go, swap in that package manager and lockfile. For non-code facts (pricing, rate limits, org charts), the source is a URL or document with its own date; "as of" is the date of that source, not today.

Part B — Verify (you do this)

  1. Flag undated claims. Reply saved as reply.txt: ! grep -nEi '\b(latest|current|newest|up to date)\b' reply.txt | grep -viE 'as of [0-9]{4}|FROM MEMORY' It prints any "latest" line with no date or label and fails if there is one.
  2. Audit the lockfile. Pin everything, including sub-dependencies (pip freeze > requirements.txt or pip-compile), then pip-audit -r requirements.txt. Exit 0 = no known advisory today. Exit 1 = advisory found, or the database couldn't be reached (fails closed). No saved state, so it works the same on a fresh machine.
  3. Let CI decide, on PRs and nightly. Require the audit on PRs and run it on a schedule, so advisories published after merge still surface. Multi-module or mixed stacks: osv-scanner scan source -r . audits every standard lockfile under the repo in one run; exit 128 if it finds none. Ignore an advisory only with its ID and reason in a reviewed commit. Don't gate on "newest version": it flakes every release.
  4. Inject the date in code. If you build the agent, put today's date and the current lockfile in the system prompt on every run, and give it a version-lookup tool.

Read the full file on GitHub · 45 lines

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. 16d ago First seen · 45 lines · 106 tokens per session scan A b9f81badd52a

Subscribe to this mod's changes

as-of-or-stop is a skill published in the GitHub repository arunveersingh/ai (3 stars, last pushed 3d ago), licensed Apache-2.0. It adds 106 tokens to every session and 885 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-10-09.

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