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Agent skill

Since Cutoff

by sickn33 in sickn33/agentic-awesome-skills

Find which APIs of a project's pinned Python dependencies changed after the model's training cutoff, where the code uses them, and write short AGENTS.md or CLAUDE.md notes.

MITAuto-check passedAgent Workflows

Install Since Cutoff

skills CLI
$ npx skills add sickn33/agentic-awesome-skills --skill since-cutoff -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install sickn33/agentic-awesome-skills since-cutoff --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/since-cutoff .claude/skills/since-cutoff && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
since-cutoff
GitHub stars
47k
Used in
1 other repo
Token cost
~1.4k tokens
SKILL.md length
660 words
Files
1
Skills in repo
1,493
Repo updated
First seen
Licence
MIT

At a glance

Find which APIs of a project's pinned Python dependencies changed after the model's training cutoff, where the code uses them, and write short AGENTS.md or CLAUDE.md notes.

  • Works in 7 steps: Work from the project root, the… → Check the runner with since-cutoff… → Run the read-only scan and name the… → …
  • Tasks that involve Agent instruction files
  • SKILL.md covers Overview, When to Use, How It Works and Examples, plus 2 more sections
  • Calls uvx

What it does

Since Cutoff is an agent skill from sickn33/agentic-awesome-skills. Find which APIs of a project's pinned Python dependencies changed after the model's training cutoff, where the code uses them, and write short AGENTS.md or CLAUDE.md notes.

Its SKILL.md is about 1.4k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Agent Workflows, covering Agent instruction files. It works with Python. The repository describes itself as: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.

When your agent uses it

  • Tasks that involve Agent instruction files

Example prompts

  • “s pinned Python dependencies changed after the model”
  • “/since-cutoff”

Requirements

  • Python 3

Workflow steps

7 steps, taken from the first numbered list in SKILL.md.

  1. Work from the project root, the directory that has pyproject.toml, requirements*.txt or a lockfile (uv.lock, poetry.lock, pdm.lock…
  2. Check the runner with since-cutoff --version. If it is missing or does not report 0.4.1, ask the user before running uvx…
  3. Run the read-only scan and name the model you are: uvx since-cutoff@0.4.1 scan --model : (for example anthropic:claude-sonnet-4-5 or…
  4. Summarise the result for the user: the model and its cutoff, which dependencies changed, and which changed APIs the code uses, with the…
  5. Write notes only if the user asks for them. Run uvx since-cutoff@0.4.1 sync --dry-run and show the user the diff it prints. Run uvx…
  6. Treat the notes as reference facts about the versions the project pins, and check them when you write code that uses those libraries.
  7. Optional: since-cutoff run measures which of the changes the model actually gets wrong. It sends prompts to the model provider the user…

What it can do on your machine

Read from SKILL.md and the folder at commit 680176d. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • uvx

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Links to these hosts (documentation or services it may open):

    • github.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Since Cutoff loads about 1.4k tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 660 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~46
When it runs · the whole SKILL.md, loaded when a task matches
~1.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from sickn33/agentic-awesome-skills at commit 680176d, republished under its MIT licence (© sickn33). 660 words, ~1,437 tokens.

Download SKILL.mdSave it as .claude/skills/since-cutoff/SKILL.md (or your agent's skills folder).
name
since-cutoff
description
Find which APIs of a project's pinned Python dependencies changed after the model's training cutoff, where the code uses them, and write short AGENTS.md or CLAUDE.md notes.
category
development
risk
safe
source
https://github.com/MohammadHijjawi97/since-cutoff/tree/f2108c13c112dce0ca3597b5a2b79ca01afa7b80/skills/since-cutoff
source_repo
MohammadHijjawi97/since-cutoff
source_type
official
date_added
2026-09-28
author
Mohammad Hijjawi
tags
python, dependencies, api-changes, knowledge-cutoff, agents-md, static-analysis
tools
claude, codex, cursor, gemini
license
MIT

since-cutoff: dependency API changes after the model's training cutoff

Overview

A coding model learns each library's API as it was at its training cutoff, but the project's lockfile keeps moving. This skill runs the since-cutoff CLI (MIT, PyPI since-cutoff, pinned here to release 0.4.1). For each pinned dependency, the CLI takes the latest release on or before the model's cutoff and compares that release's public API with the pinned release. The comparison is static (griffe), so no package code runs. It then reports the changed APIs that the project's code uses, with the files that use them. If the user agrees, it writes short notes into AGENTS.md or CLAUDE.md, each tagged with the evidence behind it (for example [diff]). scan makes no model calls and needs no API key. This adapts the upstream skill under its MIT license.

When to Use

  • Use when the user asks whether you know the versions of their Python dependencies, or what changed since your training data.
  • Use when code keeps failing on a renamed, moved or removed function, class or parameter of a pinned library.
  • Use after a dependency upgrade, before writing code against the upgraded library.
  • Do not use for projects that are not Python.

How It Works

  1. Work from the project root, the directory that has pyproject.toml, requirements*.txt or a lockfile (uv.lock, poetry.lock, pdm.lock, pylock.toml, Pipfile.lock).
  2. Check the runner with since-cutoff --version. If it is missing or does not report 0.4.1, ask the user before running uvx since-cutoff@0.4.1, which downloads that release from PyPI the first time. Do not install anything else or change the user's environment.
  3. Run the read-only scan and name the model you are: uvx since-cutoff@0.4.1 scan --model <provider>:<model> (for example anthropic:claude-sonnet-4-5 or openai:gpt-5.4). Without --model, it reads the model from the coding agent's settings and prints where it found it. The scan reads the project's files, PyPI and models.dev. It sends none of the project's code anywhere.
  4. Summarise the result for the user: the model and its cutoff, which dependencies changed, and which changed APIs the code uses, with the files that use them.
  5. Write notes only if the user asks for them. Run uvx since-cutoff@0.4.1 sync --dry-run and show the user the diff it prints. Run uvx since-cutoff@0.4.1 sync --yes only after they agree. It writes one marked block into AGENTS.md (or into CLAUDE.md if that is the file the project uses) and leaves the rest of the file unchanged. Run after later upgrades, it keeps the block in step with the lockfile. Exit code 4 means the block was edited by hand: tell the user, and pass --force only if they say so. uvx since-cutoff@0.4.1 unapply removes the block.
  6. Treat the notes as reference facts about the versions the project pins, and check them when you write code that uses those libraries.
  7. Optional: since-cutoff run measures which of the changes the model actually gets wrong. It sends prompts to the model provider the user picks (package names, versions, public API signatures and generated tasks, never the project's source code) and uses their credits or usage, so ask first.
Show full SKILL.md (141 more words)Show less

Examples

bash
uvx since-cutoff@0.4.1 scan --model anthropic:claude-sonnet-4-5

Output on the project's sample app, abridged to one package:

text
Your code uses 2 APIs that changed after claude-sonnet-4-5's training cutoff (2025-07-31)

anthropic 0.60.0 -> 1.8.0 (0.60.0 was the latest release at the cutoff; pyproject.toml pins 1.8.0)
  Messages.create: temperature, top_k and top_p were removed                          uses this API
    app/main.py   calls create
    Note: `Messages.create()` no longer accepts `temperature`, `top_k` or `top_p` as keyword
          arguments. If the API still needs them, pass them through its `extra_body` or
          `extra_query` argument. [diff]

Limitations

  • Python projects only.
  • It compares the shape of the public API: names, signatures, parameters and deprecation markers. A change in behaviour behind an unchanged signature is invisible to it.
  • The training cutoff only decides which changes to look at. It does not show what the model memorised; run measures that.
  • It needs network access to PyPI, and to models.dev for model cutoffs. The first scan downloads the releases it compares. Results are cached locally.

Security Notes

scan and status do not change project files: they write only to their own git-ignored .since-cutoff/ folder and a local cache. sync writes one marked block to AGENTS.md or CLAUDE.md, and only after the user agrees. No package code and no model-written code is executed. Credentials are needed only for the optional run.

© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/since-cutoff of sickn33/agentic-awesome-skills.

Open the folder on GitHubat commit 680176d

Used in 1 other repository

We found 5 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Since Cutoff next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Since Cutoff compared with similar skills
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Requirement Ledger CLI Workflowadand-91/gpt-6-astra-skill126—~1.5kAutomated safety check: PassMIT
Analyze Codebasedivar-ir/ai-doc-gen767—~899Automated safety check: PassMIT

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Works with

Categories

Questions about Since Cutoff

What does Since Cutoff do?

Find which APIs of a project's pinned Python dependencies changed after the model's training cutoff, where the code uses them, and write short AGENTS.md or CLAUDE.md notes. Since Cutoff is an agent skill from sickn33/agentic-awesome-skills.md notes.

When should I use Since Cutoff?

Since Cutoff fits situations like: tasks that involve Agent instruction files.

How do I install Since Cutoff in Claude Code?

Run `npx skills add sickn33/agentic-awesome-skills --skill since-cutoff -a claude-code`. Or copy the skill folder (skills/since-cutoff in sickn33/agentic-awesome-skills) into .claude/skills/since-cutoff in your project. Claude Code loads it when a task matches its description.

How do I install Since Cutoff in Codex?

Run `npx skills add sickn33/agentic-awesome-skills --skill since-cutoff -a codex`. Or copy the skill folder (skills/since-cutoff in sickn33/agentic-awesome-skills) into .agents/skills/since-cutoff in your project. Codex loads it when a task matches its description.

Can I use Since Cutoff in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sickn33/agentic-awesome-skills --skill since-cutoff -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/since-cutoff, .gemini/skills/since-cutoff, .github/skills/since-cutoff and .opencode/skills/since-cutoff in your project.

What does Since Cutoff need to run?

Going by SKILL.md and its folder, Since Cutoff needs the command-line tools its instructions call (uvx). Our summary lists: Python 3.

Does Since Cutoff access the network?

SKILL.md names 1 domain. As links in the text: github.com. This is read from the text; nothing was executed.

Is Since Cutoff safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Since Cutoff use?

Since Cutoff is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Since Cutoff use?

About 1.4k tokens (SKILL.md is roughly 5.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Since Cutoff?

Skills that share tags, products or a category with Since Cutoff: Mspm0 Ccs (mc3545dada/mspm0-skill, 374 stars), Generate AI Rules (divar-ir/ai-doc-gen, 767 stars), Goal Prompt Builder (win4r/goal-prompt-builder, 229 stars) and Requirement Ledger CLI Workflow (adand-91/gpt-6-astra-skill, 126 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Since Cutoff?

sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,379 GitHub stars. The repository holds 1,493 skills in this directory. The repository was last updated on October 9, 2026.

Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.