Context Mode Output Sandbox
mksglu/context-mode
Routes large command, file, API and browser output through context-mode tools so only the needed result enters the agent's context, instead of dumping it via Bash.
Build evaluation frameworks for agent systems. An agent skill from aiskillstore/marketplace.
Install Evaluation
$ npx skills add aiskillstore/marketplace --skill evaluation -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace evaluation --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/sickn33/evaluation .claude/skills/evaluation && rm -rf skills-srcUse ~/.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/
Install the "evaluation" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluation into .claude/skills/evaluation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evaluation", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluationType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aiskillstore/marketplace --skill evaluation -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace evaluation --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/sickn33/evaluation .agents/skills/evaluation && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "evaluation" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluation into .agents/skills/evaluation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evaluation", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill evaluation -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace evaluation --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/sickn33/evaluation .cursor/skills/evaluation && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "evaluation" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluation into .cursor/skills/evaluation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evaluation", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aiskillstore/marketplace.git --path skills/sickn33/evaluation--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aiskillstore/marketplace --skill evaluation -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace evaluation --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/sickn33/evaluation .gemini/skills/evaluation && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "evaluation" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluation into .gemini/skills/evaluation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evaluation", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aiskillstore/marketplace evaluationInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aiskillstore/marketplace --skill evaluation -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/sickn33/evaluation .github/skills/evaluation && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "evaluation" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluation into .github/skills/evaluation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evaluation", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill evaluation -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace evaluation --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/sickn33/evaluation .opencode/skills/evaluation && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "evaluation" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/sickn33/evaluation into .opencode/skills/evaluation/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "evaluation", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
evaluation- GitHub stars
- 430
- Used in
- 6 other repos
- Token cost
- ~2.8k tokens
- SKILL.md length
- 1,171 words
- Files
- 2
- Skills in repo
- 1,085
- Repo updated
- First seen
- Licence
- None found
At a glance
Build evaluation frameworks for agent systems. An agent skill from aiskillstore/marketplace.
- Works in 8 steps: Define quality dimensions relevant to… → Create rubrics with clear, actionable… → Build test sets from real usage patterns… → …
- Testing agent performance systematically
- SKILL.md covers When to Use This Skill, When to Use, Core Concepts and Detailed Topics, plus 7 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Evaluation is an agent skill from aiskillstore/marketplace. Build evaluation frameworks for agent systems. Use when testing agent performance systematically, validating context engineering choices, or measuring improvements over time.
Its SKILL.md is about 2.8k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `skill-report.json`).
It sits in Agent Workflows, covering Context engineering. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- Testing agent performance systematically
- Validating context engineering choices
- Measuring improvements over time
Example prompts
- “/evaluation”
Requirements
- Python 3
Workflow steps
8 steps, taken from the first numbered list in SKILL.md.
- Define quality dimensions relevant to your use case
- Create rubrics with clear, actionable level descriptions
- Build test sets from real usage patterns and edge cases
- Implement automated evaluation pipelines
- Establish baseline metrics before making changes
- Run evaluations on all significant changes
- Track metrics over time for trend analysis
- Supplement automated evaluation with human review
What it can do on your machine
Read from SKILL.md and the folder at commit 4ac52da. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are python).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
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
Evaluation loads about 2.8k tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 1,171 words of instructions outside code blocks.
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
Without a licence we can't republish the file, so here is its outline and opening line. It has 1,171 words (~2,760 tokens).
“Build evaluation frameworks for agent systems”
- name
- evaluation
- risk
- safe
- source
- https://github.com/muratcankoylan/Agent-Skills-for-Context-Engineering/tree/main/skills/evaluation
- date_added
- 2026-02-27
Files
SKILL.md and 1 other file in skills/sickn33/evaluation of aiskillstore/marketplace.
- SKILL.md
- skill-report.json
Open the folder on GitHubat commit 4ac52da
Used in 6 other repositories
We found 17 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 6 other GitHub owners. This page covers the copy in aiskillstore/marketplace, which our catalogue first saw on October 7, 2026.
- majiayu000/claude-skill-registryskills/ai-llm/context-eng-evaluation
- sickn33/agentic-awesome-skillsskills/evaluationplugins/agentic-awesome-skills/skills/evaluation+1 more
- agent-skills-hub/agent-skills-hubskills/evaluation
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/evaluationantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/evaluation+1 more
- benjaminasterA/antigravity-awesome-skillsskills/evaluation
- henryalouf/ruflow.agents/skills/evaluation.agents/skills/antigravity-awesome-skills/skills/evaluation+4 more
Compare with similar skills
Evaluation 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Evaluation this skillaiskillstore/marketplace | 430 | 6 repos | ~2.8k | Automated safety check: Pass | None | |
| Context Mode Output Sandboxmksglu/context-mode | 26k | — | ~4.1k | Automated safety check: Pass | Custom licence | |
| Memori Long-Term MemoryMemoriLabs/Memori | 17k | — | ~2k | Automated safety check: Notes | Custom licence | |
| Picoclaw Skill Creatorsipeed/picoclaw | 30k | — | ~4.4k | Automated safety check: Pass | MIT | |
| ccc Semantic Code Searchcocoindex-io/cocoindex-code | 2.7k | — | ~938 | Automated safety check: Pass | Apache-2.0 | |
| Context Mode for Antigravity CLImksglu/context-mode | 26k | — | ~850 | Automated safety check: Pass | Custom licence |
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Related
Categories
Questions about Evaluation
What does Evaluation do?
Build evaluation frameworks for agent systems. An agent skill from aiskillstore/marketplace. Evaluation is an agent skill from aiskillstore/marketplace. Build evaluation frameworks for agent systems.
When should I use Evaluation?
Evaluation fits situations like: testing agent performance systematically; validating context engineering choices; measuring improvements over time.
How do I install Evaluation in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill evaluation -a claude-code`. Or copy the skill folder (skills/sickn33/evaluation in aiskillstore/marketplace) into .claude/skills/evaluation in your project. Claude Code loads it when a task matches its description.
How do I install Evaluation in Codex?
Run `npx skills add aiskillstore/marketplace --skill evaluation -a codex`. Or copy the skill folder (skills/sickn33/evaluation in aiskillstore/marketplace) into .agents/skills/evaluation in your project. Codex loads it when a task matches its description.
Can I use Evaluation 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 aiskillstore/marketplace --skill evaluation -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/evaluation, .gemini/skills/evaluation, .github/skills/evaluation and .opencode/skills/evaluation in your project.
What does Evaluation need to run?
SKILL.md names no scripts, command-line tools or credentials: Evaluation is instructions for the agent only. Our summary lists: Python 3.
Does Evaluation access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Evaluation 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 Evaluation use?
No licence was found for Evaluation or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Evaluation use?
About 2.8k tokens (SKILL.md is roughly 11k 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 Evaluation?
Skills that share tags, products or a category with Evaluation: Context Mode Output Sandbox (mksglu/context-mode, 26k stars), Memori Long-Term Memory (MemoriLabs/Memori, 17k stars), Picoclaw Skill Creator (sipeed/picoclaw, 30k stars) and ccc Semantic Code Search (cocoindex-io/cocoindex-code, 2.7k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Evaluation?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,085 skills in this directory. The repository was last updated on October 7, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.