live-exercise

An interactive workflow for building, fixing, checking, or debugging work that appears in a running application. It adapts its depth to the task, from a focused fix to a broader release check.

In plain words
What is it for?
Use it for interface features, visible bugs, unreliable behavior, hover or focus problems, animation issues, and layout overflow before release.
Why use it?
It checks the actual visible result, including intermittent interface problems that may not be clear from source code alone.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/gitkraken/vscode-gitlens/live-exercise
Any agent
npx skills add gitkraken/vscode-gitlens --skill live-exercise
Clone the repo
git clone --depth 1 https://github.com/gitkraken/vscode-gitlens

Made for: Claude Code, Codex.

Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 7,435 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00076 $0.07435
Opus 5 $0.00038 $0.03717
Sonnet 5 $0.00015 $0.01487
Haiku 4.5 $0.00008 $0.00743

Measured 3d ago against content hash 94577f726bb2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

live-exercise 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 3d 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.

.claude/skills/live-exercise/SKILL.md · 430 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 3d ago First seen · 430 lines · 76 tokens per session scan A 94577f726bb2

Subscribe to this mod's changes

live-exercise is a skill published in the GitHub repository gitkraken/vscode-gitlens (9,912 stars, last pushed yesterday), with no licence file. It adds 76 tokens to every session and 7,435 once invoked, about $0.0004 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 2026-08-30.