Agent skill

Openpyxl Sandbox Workaround

Use runshell with inline Python as a fallback when executecodesandbox fails for openpyxl/spreadsheet operations

Install Openpyxl Sandbox Workaround

skills CLI

$ npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a claude-code

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

GitHub CLI

$ gh skill install HKUDS/OpenSpace openpyxl-sandbox-workaround --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/HKUDS/OpenSpace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/benchmarks/gdpval/skills/openpyxl-sandbox-workaround .claude/skills/openpyxl-sandbox-workaround && 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/

Paste into Claude Code

Install the "openpyxl-sandbox-workaround" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround into .claude/skills/openpyxl-sandbox-workaround/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openpyxl-sandbox-workaround", 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

$skill-installer install https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround

Type 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.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace openpyxl-sandbox-workaround --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/benchmarks/gdpval/skills/openpyxl-sandbox-workaround .agents/skills/openpyxl-sandbox-workaround && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "openpyxl-sandbox-workaround" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround into .agents/skills/openpyxl-sandbox-workaround/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openpyxl-sandbox-workaround", 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.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace openpyxl-sandbox-workaround --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/benchmarks/gdpval/skills/openpyxl-sandbox-workaround .cursor/skills/openpyxl-sandbox-workaround && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "openpyxl-sandbox-workaround" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround into .cursor/skills/openpyxl-sandbox-workaround/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openpyxl-sandbox-workaround", 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

$ gemini skills install https://github.com/HKUDS/OpenSpace.git --path benchmarks/gdpval/skills/openpyxl-sandbox-workaround

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace openpyxl-sandbox-workaround --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/benchmarks/gdpval/skills/openpyxl-sandbox-workaround .gemini/skills/openpyxl-sandbox-workaround && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "openpyxl-sandbox-workaround" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround into .gemini/skills/openpyxl-sandbox-workaround/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openpyxl-sandbox-workaround", 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.

GitHub CLI

$ gh skill install HKUDS/OpenSpace openpyxl-sandbox-workaround

Installs 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).

skills CLI

$ npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .github/skills && cp -r skills-src/benchmarks/gdpval/skills/openpyxl-sandbox-workaround .github/skills/openpyxl-sandbox-workaround && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "openpyxl-sandbox-workaround" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround into .github/skills/openpyxl-sandbox-workaround/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openpyxl-sandbox-workaround", 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.

skills CLI

$ npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install HKUDS/OpenSpace openpyxl-sandbox-workaround --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/benchmarks/gdpval/skills/openpyxl-sandbox-workaround .opencode/skills/openpyxl-sandbox-workaround && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "openpyxl-sandbox-workaround" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/openpyxl-sandbox-workaround into .opencode/skills/openpyxl-sandbox-workaround/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openpyxl-sandbox-workaround", 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: openpyxl-sandbox-workaround
GitHub stars: 7.8k
Token cost: ~849 tokens
SKILL.md length: 231 words
Files: 2
Skills in repo: 199
Repo updated: Aug 12, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Use runshell with inline Python as a fallback when executecodesandbox fails for openpyxl/spreadsheet operations

Works in 5 steps: Use heredoc syntax: The << 'EOF' pattern… → Print success messages: Always include… → Handle file paths: Use absolute paths or… → …
Tasks that involve Excel spreadsheets
SKILL.md covers When to Use, Common Failure Indicators, The Workaround Pattern and Multi-Step Spreadsheet Tasks, plus 4 more sections
Calls python3

What it does

Openpyxl Sandbox Workaround is an agent skill from HKUDS/OpenSpace. Use runshell with inline Python as a fallback when executecodesandbox fails for openpyxl/spreadsheet operations

Its SKILL.md is about 850 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.

It sits in Documents & Office, covering Excel spreadsheets. It works with openpyxl and Python. The repository describes itself as: "OpenSpace: The Skill Management Layer for AI Agents" -- https://open-space.cloud/. The licence is MIT.

When your agent uses it

Tasks that involve Excel spreadsheets

Example prompts

“/openpyxl-sandbox-workaround”

Requirements

Python 3

Workflow steps

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

Use heredoc syntax: The << 'EOF' pattern prevents variable expansion issues
Print success messages: Always include print statements to confirm completion
Handle file paths: Use absolute paths or ensure you're in the correct working directory
Validate output: After creation, verify the file exists and has expected content
Error handling: Add try/except blocks for robustness in complex scripts

What it can do on your machine

Read from SKILL.md and the folder at commit 3827781. 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:
- python3
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

Openpyxl Sandbox Workaround loads about 849 tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 231 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~36
When it runs · the whole SKILL.md, loaded when a task matches: ~849

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 HKUDS/OpenSpace at commit 3827781, republished under its MIT licence (© HKUDS). 231 words, ~849 tokens.

Download SKILL.mdSave it as .claude/skills/openpyxl-sandbox-workaround/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: openpyxl-sandbox-workaround
description: Use run_shell with inline Python as a fallback when execute_code_sandbox fails for openpyxl/spreadsheet operations

Openpyxl Sandbox Workaround

When to Use

Use this pattern when execute_code_sandbox repeatedly fails for openpyxl or spreadsheet manipulation tasks. The sandbox environment may have compatibility issues with certain openpyxl operations, but running Python directly via run_shell often succeeds.

Common Failure Indicators

execute_code_sandbox returns errors related to openpyxl imports or operations
Multiple retry attempts fail with similar errors
Errors mention workbook creation, cell writing, or file saving issues

The Workaround Pattern

Instead of using execute_code_sandbox, use run_shell with an inline Python script:

bash

python3 << 'EOF'
from openpyxl import Workbook
from openpyxl.utils import get_column_letter

# Your openpyxl code here
wb = Workbook()
ws = wb.active
ws.title = "Sheet1"

# Add data
ws['A1'] = 'Header'
ws['B1'] = 'Value'

# Save file
wb.save('output.xlsx')
print('File created successfully')
EOF

Multi-Step Spreadsheet Tasks

For complex operations involving multiple files or data processing:

bash

python3 << 'EOF'
from openpyxl import Workbook, load_workbook
import os

# Load existing workbook if needed
if os.path.exists('input.xlsx'):
    wb = load_workbook('input.xlsx')
    ws = wb.active
    # Process data...
    
# Create new workbook
wb = Workbook()
ws = wb.active

# Add data with proper formatting
for row_idx, row_data in enumerate(data, start=1):
    for col_idx, value in enumerate(row_data, start=1):
        ws.cell(row=row_idx, column=col_idx, value=value)

# Auto-adjust column widths
for column in ws.columns:
    max_length = 0
    column_letter = get_column_letter(column[0].column)
    for cell in column:
        try:
            if len(str(cell.value)) > max_length:
                max_length = len(str(cell.value))
        except:
            pass
    adjusted_width = min(max_length + 2, 50)
    ws.column_dimensions[column_letter].width = adjusted_width

wb.save('output.xlsx')
EOF

Best Practices

Use heredoc syntax: The << 'EOF' pattern prevents variable expansion issues
Print success messages: Always include print statements to confirm completion
Handle file paths: Use absolute paths or ensure you're in the correct working directory
Validate output: After creation, verify the file exists and has expected content
Error handling: Add try/except blocks for robustness in complex scripts

Verification Step

After running the script, verify the file was created:

bash

ls -la *.xlsx

Or check file details:

bash

python3 << 'EOF'
from openpyxl import load_workbook
wb = load_workbook('output.xlsx')
print(f"Sheets: {wb.sheetnames}")
print(f"Active sheet: {wb.active.title}")
EOF

When to Fall Back to This Pattern

First execute_code_sandbox attempt fails with openpyxl errors
Error persists after 1-2 retries
Task is time-sensitive and needs a reliable solution
The operation is straightforward file creation/modification

Limitations

Output is limited to stdout/stderr (no direct artifact download from run_shell)
Files are created in the current working directory
More verbose than execute_code_sandbox for simple operations

Files

SKILL.md and 1 other file in benchmarks/gdpval/skills/openpyxl-sandbox-workaround of HKUDS/OpenSpace.

SKILL.md
.skill_id

Open the folder on GitHubat commit 3827781

Compare with similar skills

Openpyxl Sandbox Workaround 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.

Openpyxl Sandbox Workaround compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Openpyxl Sandbox Workaround this skillHKUDS/OpenSpace	7.8k	—	~849	Automated safety check: Pass	MIT	1 mo ago
Excel Workbook EditorTokenRhythm/opensquilla	7.1k	—	~1.6k	Automated safety check: Pass	Apache-2.0	yesterday
Kimi XLSXthvroyal/kimi-skills	238	—	~9.5k	Automated safety check: Pass	None	6 mo ago
Office XLSXopen-octo/octo-agent	125	—	~1.8k	Automated safety check: Notes	MIT	yesterday
Cc Streaming Export Safetydoccker/cc-use-exp	1.1k	—	~2.2k	Automated safety check: Pass	Custom licence	1 mo ago
XLSXnexus-research-lab/nexus	151	—	~501	Automated safety check: Pass	Apache-2.0	yesterday

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Questions about Openpyxl Sandbox Workaround

What does Openpyxl Sandbox Workaround do?

Use runshell with inline Python as a fallback when executecodesandbox fails for openpyxl/spreadsheet operations. Openpyxl Sandbox Workaround is an agent skill from HKUDS/OpenSpace.

When should I use Openpyxl Sandbox Workaround?

Openpyxl Sandbox Workaround fits situations like: tasks that involve Excel spreadsheets.

How do I install Openpyxl Sandbox Workaround in Claude Code?

Run `npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a claude-code`. Or copy the skill folder (benchmarks/gdpval/skills/openpyxl-sandbox-workaround in HKUDS/OpenSpace) into .claude/skills/openpyxl-sandbox-workaround in your project. Claude Code loads it when a task matches its description.

How do I install Openpyxl Sandbox Workaround in Codex?

Run `npx skills add HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a codex`. Or copy the skill folder (benchmarks/gdpval/skills/openpyxl-sandbox-workaround in HKUDS/OpenSpace) into .agents/skills/openpyxl-sandbox-workaround in your project. Codex loads it when a task matches its description.

Can I use Openpyxl Sandbox Workaround 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 HKUDS/OpenSpace --skill openpyxl-sandbox-workaround -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/openpyxl-sandbox-workaround, .gemini/skills/openpyxl-sandbox-workaround, .github/skills/openpyxl-sandbox-workaround and .opencode/skills/openpyxl-sandbox-workaround in your project.

What does Openpyxl Sandbox Workaround need to run?

Going by SKILL.md and its folder, Openpyxl Sandbox Workaround needs the command-line tools its instructions call (python3). Our summary lists: Python 3.

Does Openpyxl Sandbox Workaround 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 Openpyxl Sandbox Workaround 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 Openpyxl Sandbox Workaround use?

Openpyxl Sandbox Workaround is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Openpyxl Sandbox Workaround use?

About 849 tokens (SKILL.md is roughly 3.4k 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 Openpyxl Sandbox Workaround?

Skills that share tags, products or a category with Openpyxl Sandbox Workaround: Excel Workbook Editor (TokenRhythm/opensquilla, 7.1k stars), Kimi XLSX (thvroyal/kimi-skills, 238 stars), Office XLSX (open-octo/octo-agent, 125 stars) and Cc Streaming Export Safety (doccker/cc-use-exp, 1.1k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Openpyxl Sandbox Workaround?

HKUDS (a GitHub organization) maintains it in HKUDS/OpenSpace, which has 7,754 GitHub stars. The repository holds 199 skills in this directory. The repository was last updated on August 12, 2026.

Source: HKUDS/OpenSpace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Openpyxl Sandbox Workaround

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Openpyxl Sandbox Workaround

When to Use

Common Failure Indicators

The Workaround Pattern

Multi-Step Spreadsheet Tasks

Best Practices

Verification Step

When to Fall Back to This Pattern

Limitations

Files

Compare with similar skills

Similar skills

More from HKUDS/OpenSpace

Related

Questions about Openpyxl Sandbox Workaround