MCP Server Builder
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
Ensure all required output files are created and verified before marking a task complete
$ npx skills add HKUDS/OpenSpace --skill verify-all-deliverables -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install HKUDS/OpenSpace verify-all-deliverables --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/HKUDS/OpenSpace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/benchmarks/gdpval/skills/verify-all-deliverables .claude/skills/verify-all-deliverables && 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 "verify-all-deliverables" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverables into .claude/skills/verify-all-deliverables/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verify-all-deliverables", 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/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverablesType 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 HKUDS/OpenSpace --skill verify-all-deliverables -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install HKUDS/OpenSpace verify-all-deliverables --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/benchmarks/gdpval/skills/verify-all-deliverables .agents/skills/verify-all-deliverables && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "verify-all-deliverables" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverables into .agents/skills/verify-all-deliverables/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verify-all-deliverables", 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 HKUDS/OpenSpace --skill verify-all-deliverables -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install HKUDS/OpenSpace verify-all-deliverables --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/benchmarks/gdpval/skills/verify-all-deliverables .cursor/skills/verify-all-deliverables && 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 "verify-all-deliverables" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverables into .cursor/skills/verify-all-deliverables/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verify-all-deliverables", 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/HKUDS/OpenSpace.git --path benchmarks/gdpval/skills/verify-all-deliverables--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 HKUDS/OpenSpace --skill verify-all-deliverables -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install HKUDS/OpenSpace verify-all-deliverables --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/benchmarks/gdpval/skills/verify-all-deliverables .gemini/skills/verify-all-deliverables && 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 "verify-all-deliverables" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverables into .gemini/skills/verify-all-deliverables/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verify-all-deliverables", 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 HKUDS/OpenSpace verify-all-deliverablesInstalls 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 HKUDS/OpenSpace --skill verify-all-deliverables -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .github/skills && cp -r skills-src/benchmarks/gdpval/skills/verify-all-deliverables .github/skills/verify-all-deliverables && 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 "verify-all-deliverables" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverables into .github/skills/verify-all-deliverables/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verify-all-deliverables", 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 HKUDS/OpenSpace --skill verify-all-deliverables -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install HKUDS/OpenSpace verify-all-deliverables --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/HKUDS/OpenSpace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/benchmarks/gdpval/skills/verify-all-deliverables .opencode/skills/verify-all-deliverables && 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 "verify-all-deliverables" agent skill from https://github.com/HKUDS/OpenSpace/tree/main/benchmarks/gdpval/skills/verify-all-deliverables into .opencode/skills/verify-all-deliverables/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "verify-all-deliverables", 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.
verify-all-deliverablesEnsure all required output files are created and verified before marking a task complete
Verify All Deliverables is an agent skill from HKUDS/OpenSpace. Ensure all required output files are created and verified before marking a task complete
Its SKILL.md is about 750 tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file.
It sits in Agent Workflows. The repository describes itself as: "OpenSpace: The Skill Management Layer for AI Agents" -- https://open-space.cloud/. The licence is MIT.
5 steps, taken from the step headings in SKILL.md.
Read from SKILL.md and the folder at commit 3827781. It shows what the files ask for, not the result of running them.
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.
No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).
From the folder's file list and the shell code blocks in SKILL.md.
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Verify All Deliverables loads about 751 tokens when it runs. Until then it costs about 28 tokens; SKILL.md has 278 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.
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.
The full file from HKUDS/OpenSpace at commit 3827781, republished under its MIT licence (© HKUDS). 278 words, ~751 tokens.
.claude/skills/verify-all-deliverables/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.This skill prevents premature task completion in multi-deliverable workflows by ensuring every required output file is created, verified to exist with non-zero size, and confirmed before declaring <COMPLETE>.
Use this skill when a task requires creating multiple output files (e.g., spreadsheet + document, report + summary, data file + visualization).
CRITICAL CHECKPOINT: Do not proceed to Step 2 until this step produces visible output.
Before starting any file creation, you MUST output a complete deliverable list in this exact format:
REQUIRED DELIVERABLES CHECKLIST:
☐ [filename1.extension] - [brief description]
☐ [filename2.extension] - [brief description]
☐ [filename3.extension] - [brief description]This checklist must appear as visible text in your output before executing any file creation commands. Track completion by updating checkboxes (☐ → ☑) as each file is created.
Execute the creation of each file one at a time. Do not proceed to the next step until the current file creation command has completed.
After creating each file, immediately verify it exists and has non-zero size:
ls -la [filename.extension]Expected output should show file size > 0 bytes. If size is 0 or file is missing, troubleshoot before proceeding.
Before declaring <COMPLETE>, run a final verification of ALL deliverables:
ls -la file1.ext file2.ext file3.extOr use a loop for many files:
for file in file1.ext file2.ext file3.ext; do
if [ -s "$file" ]; then
echo "✓ $file exists ($(stat -c%s "$file") bytes)"
else
echo "✗ $file missing or empty"
exit 1
fi
doneOnly output <COMPLETE> after all files have been verified with non-zero size.
| Pitfall | Prevention |
|---|---|
| Creating only some deliverables | List all deliverables upfront and track completion |
| Not verifying file sizes | Always run ls -la after each file creation |
| Declaring complete too early | Final verification step is mandatory |
| Assuming success without checking | Explicitly check each file before proceeding |
Task: Create tracking spreadsheet and email template document
1. Identify deliverables:
- June_2025_Declined_Payments_Outreach.xlsx
- Email_Template.docx
2. Create spreadsheet → verify with ls -la → confirm size > 0
3. Create Word document → verify with ls -la → confirm size > 0
4. Final check: ls -la *.xlsx *.docx → confirm both files present
5. Only then: <COMPLETE>© HKUDS, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
SKILL.md and 1 other file in benchmarks/gdpval/skills/verify-all-deliverables of HKUDS/OpenSpace.
Open the folder on GitHubat commit 3827781
Verify All Deliverables 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 |
|---|---|---|---|---|---|---|
| Verify All Deliverables this skillHKUDS/OpenSpace | 7.8k | — | ~751 | Automated safety check: Pass | MIT | |
| MCP Server Builderanthropics/skills | 180k | 63 repos | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Using Superpowersfarm-fe/farm | 5.6k | 36 repos | ~1.4k | Automated safety check: Pass | MIT | |
| Executing Plans Inlineobra/superpowers | 297k | 2 repos | ~5.1k | Automated safety check: Pass | MIT | |
| Skill CreatorAzure/azqr | 796 | 89 repos | ~8.2k | Automated safety check: Pass | Apache-2.0 |
anthropics/skills
Guides the design and implementation of Model Context Protocol servers in TypeScript or Python, from tool naming and error messages to evaluation.
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
farm-fe/farm
A skill your agent uses when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions
obra/superpowers
Has the agent carry out an implementation plan itself, task by task in the current session, keeping a ledger, proving each step with a test and ending with one whole-branch review.
Azure/azqr
Create new skills, modify and improve existing skills, and measure skill performance.
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
HKUDS/OpenSpace
Walks through producing a master audio track plus stems in Python, from checking a reference file and timing sections by BPM to effects, a zip archive and final verification.
HKUDS/OpenSpace
Handle cascading data retrieval tool failures by falling back to embedded knowledge generation
HKUDS/OpenSpace
Gives an agent a workaround when its code-execution sandbox keeps failing: save the Python script to a file and run it through the shell instead.
HKUDS/OpenSpace
A recovery routine for agents whose sandboxed code runner keeps failing: save the Python script to disk, then run it through the shell and read the output.
HKUDS/OpenSpace
Fallback ladder for failed sandboxed code runs, plus the habit of fixing the working directory first so generated files land in the right place.
HKUDS/OpenSpace
Fallback workflow for executing Python code when executecodesandbox fails repeatedly
Categories
Ensure all required output files are created and verified before marking a task complete. Verify All Deliverables is an agent skill from HKUDS/OpenSpace.
Verify All Deliverables fits situations like: agent Workflows work in your project.
Run `npx skills add HKUDS/OpenSpace --skill verify-all-deliverables -a claude-code`. Or copy the skill folder (benchmarks/gdpval/skills/verify-all-deliverables in HKUDS/OpenSpace) into .claude/skills/verify-all-deliverables in your project. Claude Code loads it when a task matches its description.
Run `npx skills add HKUDS/OpenSpace --skill verify-all-deliverables -a codex`. Or copy the skill folder (benchmarks/gdpval/skills/verify-all-deliverables in HKUDS/OpenSpace) into .agents/skills/verify-all-deliverables in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add HKUDS/OpenSpace --skill verify-all-deliverables -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/verify-all-deliverables, .gemini/skills/verify-all-deliverables, .github/skills/verify-all-deliverables and .opencode/skills/verify-all-deliverables in your project.
SKILL.md names no scripts, command-line tools or credentials: Verify All Deliverables is instructions for the agent only.
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.
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.
Verify All Deliverables is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 751 tokens (SKILL.md is roughly 3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Verify All Deliverables: MCP Server Builder (anthropics/skills, 180k stars), Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Using Superpowers (farm-fe/farm, 5.6k stars) and Executing Plans Inline (obra/superpowers, 297k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
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.