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Agent skill

PDF Gen Fallback 501bcc

by HKUDS in HKUDS/OpenSpace

Fallback pattern for PDF/document generation when executecodesandbox fails with opaque errors

MITAuto-check passedDocuments & Office

Install PDF Gen Fallback 501bcc

skills CLI
$ npx skills add HKUDS/OpenSpace --skill pdf-gen-fallback-501bcc -a claude-code

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

GitHub CLI
$ gh skill install HKUDS/OpenSpace pdf-gen-fallback-501bcc --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/pdf-gen-fallback-501bcc .claude/skills/pdf-gen-fallback-501bcc && 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
pdf-gen-fallback-501bcc
GitHub stars
7.8k
Token cost
~1k tokens
SKILL.md length
254 words
Files
2
Skills in repo
199
Repo updated
First seen
Licence
MIT

At a glance

Fallback pattern for PDF/document generation when executecodesandbox fails with opaque errors

  • Works in 6 steps: Detect Sandbox Failure → Check Library Availability → Install Missing Libraries (If Needed) → …
  • Tasks that involve PDF
  • SKILL.md covers When to Use, Step-by-Step Procedure, Complete Example Workflow and Why This Works, plus 1 more section
  • Calls python and pip

What it does

PDF Gen Fallback 501bcc is an agent skill from HKUDS/OpenSpace. Fallback pattern for PDF/document generation when executecodesandbox fails with opaque errors

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

It sits in Documents & Office, covering PDF. It works with pypdf, Python and Microsoft Word. 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 PDF

Example prompts

  • “/pdf-gen-fallback-501bcc”

Requirements

  • Python 3

Workflow steps

6 steps, taken from the step headings in SKILL.md.

  1. Detect Sandbox Failure
  2. Check Library Availability
  3. Install Missing Libraries (If Needed)
  4. Execute Document Generation via run_shell
  5. Include Explicit Error Handling
  6. Verify Output File

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:

    • python
    • pip

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

  • Network

    No URLs in SKILL.md. Its commands use pip, which can reach the network depending on how they are called.

    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

PDF Gen Fallback 501bcc loads about 1k tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 254 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~30
When it runs · the whole SKILL.md, loaded when a task matches
~1k

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). 254 words, ~1,047 tokens.

Download SKILL.mdSave it as .claude/skills/pdf-gen-fallback-501bcc/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
pdf-gen-fallback-501bcc
description
Fallback pattern for PDF/document generation when execute_code_sandbox fails with opaque errors

PDF Generation Fallback Pattern

When to Use

Apply this pattern when execute_code_sandbox returns opaque or unhelpful errors during PDF, DOCX, or other document generation tasks. This fallback uses run_shell with direct python -c execution for more reliable document generation.

Step-by-Step Procedure

1. Detect Sandbox Failure

If execute_code_sandbox fails during document generation with errors like:

  • Opaque runtime errors
  • Missing library errors that don't resolve with import statements
  • Silent failures with no output

Proceed to the fallback approach.

2. Check Library Availability

Before generating documents, verify the required Python libraries are available in the shell environment:

bash
python -c "import reportlab; print('OK')" 2>&1 || echo "reportlab missing"
python -c "import fpdf; print('OK')" 2>&1 || echo "fpdf missing"
python -c "import pypdf; print('OK')" 2>&1 || echo "pypdf missing"
python -c "import docx; print('OK')" 2>&1 || echo "python-docx missing"
3. Install Missing Libraries (If Needed)

If a library is missing, install it via pip:

bash
pip install reportlab fpdf2 pypdf python-docx
4. Execute Document Generation via run_shell

Use run_shell with python -c and multi-line strings for document generation:

bash
python -c "
from reportlab.lib.pagesizes import letter
from reportlab.pdfgen import canvas

c = canvas.Canvas('output.pdf', pagesize=letter)
c.drawString(100, 750, 'Document Title')
c.drawString(100, 700, 'Content here')
c.save()
print('SUCCESS: PDF created')
"

For DOCX files:

bash
python -c "
from docx import Document

doc = Document()
doc.add_heading('Document Title', 0)
doc.add_paragraph('Content here')
doc.save('output.docx')
print('SUCCESS: DOCX created')
"
5. Include Explicit Error Handling

Always wrap generation code with try/except for clear error reporting:

bash
python -c "
try:
    from reportlab.lib.pagesizes import letter
    from reportlab.pdfgen import canvas
    
    c = canvas.Canvas('output.pdf', pagesize=letter)
    c.drawString(100, 750, 'Content')
    c.save()
    print('SUCCESS')
except ImportError as e:
    print(f'MISSING_LIBRARY: {e}')
    exit(1)
except Exception as e:
    print(f'GENERATION_ERROR: {e}')
    exit(1)
"
6. Verify Output File

After generation, confirm the file was created and is valid:

bash
ls -la output.pdf
file output.pdf
test -f output.pdf && echo "File exists" || echo "File missing"

Complete Example Workflow

bash
# Step 1: Check and install library
python -c "import reportlab" 2>&1 || pip install reportlab

# Step 2: Generate PDF with error handling
python -c "
try:
    from reportlab.lib.pagesizes import letter
    from reportlab.pdfgen import canvas
    
    c = canvas.Canvas('report.pdf', pagesize=letter)
    c.setFont('Helvetica', 12)
    c.drawString(100, 750, 'Surveillance Report')
    c.drawString(100, 700, 'Generated via fallback pattern')
    c.save()
    print('SUCCESS: report.pdf created')
except Exception as e:
    print(f'ERROR: {e}')
    exit(1)
"

# Step 3: Verify
test -f report.pdf && echo "Verification: PASSED" || echo "Verification: FAILED"

Why This Works

  • Direct Execution: run_shell with python -c bypasses sandbox limitations that may affect document generation libraries
  • Explicit Errors: Try/except blocks provide actionable error messages instead of opaque failures
  • Environment Control: Shell execution gives more control over the Python environment and library paths
  • Verification: Explicit file checks confirm success rather than assuming it

Common Libraries

LibraryPurposeImport Statement
reportlabPDF generationfrom reportlab.pdfgen import canvas
fpdf2PDF generationfrom fpdf import FPDF
pypdfPDF manipulationfrom pypdf import PdfReader
python-docxDOCX generationfrom docx import Document
xlsxwriterExcel filesimport xlsxwriter

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

Files

SKILL.md and 1 other file in benchmarks/gdpval/skills/pdf-gen-fallback-501bcc of HKUDS/OpenSpace.

  • SKILL.md
  • .skill_id

Open the folder on GitHubat commit 3827781

Compare with similar skills

PDF Gen Fallback 501bcc 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.

PDF Gen Fallback 501bcc compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
PDF Gen Fallback 501bcc this skillHKUDS/OpenSpace7.8k—~1kAutomated safety check: PassMIT
PDF ToolkitXiaomiMiMo/MiMo-Code14k—~1.7kAutomated safety check: PassApache-2.0
PDF Generation, Forms and Extractionpipeshub-ai/pipeshub-ai3.8k—~2.9kAutomated safety check: PassApache-2.0
MineruNebutra/MinerU-Skill123—~1.4kAutomated safety check: PassMIT
Markdown Exporterbowenliang123/markdown-exporter2721 repos~5.3kAutomated safety check: PassApache-2.0
PDFNousResearch/hermes-agent252k—~3.1kAutomated safety check: PassMIT

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Works with

Categories

Questions about PDF Gen Fallback 501bcc

What does PDF Gen Fallback 501bcc do?

Fallback pattern for PDF/document generation when executecodesandbox fails with opaque errors. PDF Gen Fallback 501bcc is an agent skill from HKUDS/OpenSpace.

When should I use PDF Gen Fallback 501bcc?

PDF Gen Fallback 501bcc fits situations like: tasks that involve PDF.

How do I install PDF Gen Fallback 501bcc in Claude Code?

Run `npx skills add HKUDS/OpenSpace --skill pdf-gen-fallback-501bcc -a claude-code`. Or copy the skill folder (benchmarks/gdpval/skills/pdf-gen-fallback-501bcc in HKUDS/OpenSpace) into .claude/skills/pdf-gen-fallback-501bcc in your project. Claude Code loads it when a task matches its description.

How do I install PDF Gen Fallback 501bcc in Codex?

Run `npx skills add HKUDS/OpenSpace --skill pdf-gen-fallback-501bcc -a codex`. Or copy the skill folder (benchmarks/gdpval/skills/pdf-gen-fallback-501bcc in HKUDS/OpenSpace) into .agents/skills/pdf-gen-fallback-501bcc in your project. Codex loads it when a task matches its description.

Can I use PDF Gen Fallback 501bcc 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 pdf-gen-fallback-501bcc -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pdf-gen-fallback-501bcc, .gemini/skills/pdf-gen-fallback-501bcc, .github/skills/pdf-gen-fallback-501bcc and .opencode/skills/pdf-gen-fallback-501bcc in your project.

What does PDF Gen Fallback 501bcc need to run?

Going by SKILL.md and its folder, PDF Gen Fallback 501bcc needs the command-line tools its instructions call (python and pip). Our summary lists: Python 3.

Does PDF Gen Fallback 501bcc access the network?

SKILL.md contains no URLs. Its commands use pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is PDF Gen Fallback 501bcc 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 PDF Gen Fallback 501bcc use?

PDF Gen Fallback 501bcc 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 PDF Gen Fallback 501bcc use?

About 1k tokens (SKILL.md is roughly 4.2k 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 PDF Gen Fallback 501bcc?

Skills that share tags, products or a category with PDF Gen Fallback 501bcc: PDF Toolkit (XiaomiMiMo/MiMo-Code, 14k stars), PDF Generation, Forms and Extraction (pipeshub-ai/pipeshub-ai, 3.8k stars), Mineru (Nebutra/MinerU-Skill, 123 stars) and Markdown Exporter (bowenliang123/markdown-exporter, 272 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains PDF Gen Fallback 501bcc?

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.