Terminal Opener
affaan-m/ECC
Open an executable and its argument array in a visible terminal window through a reusable, shell-free launch plan with dry-run, JSON, capability detection, detached fallback, and standalone recovery…
Measure where every NullPlayer sub-window opens and how big it is, per skin or across the whole skin corpus (Classic, Original, Original-Metal, .wal, .wmz), and report the findings — which windows…
Custom licenceAuto-check passed
Install Window Census
$ npx skills add ad-repo/nullplayer --skill window-census -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ad-repo/nullplayer window-census --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/ad-repo/nullplayer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/window-census .claude/skills/window-census && 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 "window-census" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/window-census into .claude/skills/window-census/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "window-census", 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/ad-repo/nullplayer/tree/main/skills/window-censusType 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 ad-repo/nullplayer --skill window-census -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ad-repo/nullplayer window-census --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/window-census .agents/skills/window-census && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "window-census" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/window-census into .agents/skills/window-census/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "window-census", 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 ad-repo/nullplayer --skill window-census -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ad-repo/nullplayer window-census --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/window-census .cursor/skills/window-census && 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 "window-census" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/window-census into .cursor/skills/window-census/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "window-census", 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/ad-repo/nullplayer.git --path skills/window-census--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 ad-repo/nullplayer --skill window-census -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ad-repo/nullplayer window-census --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/window-census .gemini/skills/window-census && 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 "window-census" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/window-census into .gemini/skills/window-census/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "window-census", 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 ad-repo/nullplayer window-censusInstalls 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 ad-repo/nullplayer --skill window-census -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/window-census .github/skills/window-census && 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 "window-census" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/window-census into .github/skills/window-census/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "window-census", 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 ad-repo/nullplayer --skill window-census -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ad-repo/nullplayer window-census --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/window-census .opencode/skills/window-census && 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 "window-census" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/window-census into .opencode/skills/window-census/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "window-census", 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
window-census- GitHub stars
- 158
- Token cost
- ~1.2k tokens
- SKILL.md length
- 660 words
- Files
- 1
- Skills in repo
- 40
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Measure where every NullPlayer sub-window opens and how big it is, per skin or across the whole skin corpus (Classic, Original, Original-Metal, .wal, .wmz), and report the findings — which windows…
- Works in 4 steps: Scope the request → Confirm before starting (anything over a… → Run it → …
- Asked to run the window census
- SKILL.md covers 1. Scope the request, 2. Confirm before starting…, 3. Run it and 4. Report, plus 1 more section
- Calls sqlite3
What it does
Window Census is an agent skill from ad-repo/nullplayer. Measure where every NullPlayer sub-window opens and how big it is, per skin or across the whole skin corpus (Classic, Original, Original-Metal, .wal, .wmz), and report the findings — which windows open too large, off screen, or fail to close back. Use when asked to run the window census, baseline default window sizes, compare default sizes across skins or families, or check whether a sizing change moved any skin's defaults.
Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
The repository describes itself as: nullPlayer is a free open source macOS media player with some unique features.
When your agent uses it
- Asked to run the window census
- Baseline default window sizes
- Compare default sizes across skins
- Check whether a sizing change moved any skins defaults
Example prompts
- “/window-census”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Scope the request
- Confirm before starting (anything over a handful of skins)
- Run it
- Report
What it can do on your machine
Read from SKILL.md and the folder at commit 3d87ce1. 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:
sqlite3
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
Window Census loads about 1.2k tokens when it runs. Until then it costs about 110 tokens; SKILL.md has 660 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 660 words (~1,231 tokens).
“The instrument is skills/app-control/scripts/window-census.sh. Its mechanics live in app-control § Window census: status vocabulary, file columns, and how each skin is isolated from the last. This skill is the user interaction around a run: what to confirm, how to run…”
- name
- window-census
Files
Just SKILL.md in skills/window-census of ad-repo/nullplayer.
Open the folder on GitHubat commit 3d87ce1
Compare with similar skills
Window Census 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 |
|---|---|---|---|---|---|---|
| Window Census this skillad-repo/nullplayer | 158 | — | ~1.2k | Automated safety check: Pass | Custom licence | |
| Terminal Openeraffaan-m/ECC | 276k | — | ~635 | Automated safety check: Pass | MIT | |
| Windows Desktop E2Eaffaan-m/ECC | 276k | 1 repos | ~7.6k | Automated safety check: Pass | MIT | |
| Windows Desktop E2Eaffaan-m/ECC | 276k | — | ~5.5k | Automated safety check: Pass | MIT | |
| Open Federationruvnet/ruflo | 74k | — | ~1.6k | Automated safety check: Pass | MIT | |
| Open NotebookK-Dense-AI/scientific-agent-skills | 48k | 1 repos | ~2.8k | Automated safety check: Pass | MIT |
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Coordinate with the open ruflo swarm federation at x.ruv.io (signed Nostr, membership-gated) and ask Seraphina — the swarm queen / primary coordinator — for guidance.
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Organizes research with the self-hosted Open Notebook alternative to NotebookLM.
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Questions about Window Census
What does Window Census do?
Measure where every NullPlayer sub-window opens and how big it is, per skin or across the whole skin corpus (Classic, Original, Original-Metal, .wal, .wmz), and report the findings — which windows…. Window Census is an agent skill from ad-repo/nullplayer.wmz), and report the findings — which windows open too large, off screen, or fail to close back.
When should I use Window Census?
Window Census fits situations like: asked to run the window census; baseline default window sizes; compare default sizes across skins; check whether a sizing change moved any skins defaults.
How do I install Window Census in Claude Code?
Run `npx skills add ad-repo/nullplayer --skill window-census -a claude-code`. Or copy the skill folder (skills/window-census in ad-repo/nullplayer) into .claude/skills/window-census in your project. Claude Code loads it when a task matches its description.
How do I install Window Census in Codex?
Run `npx skills add ad-repo/nullplayer --skill window-census -a codex`. Or copy the skill folder (skills/window-census in ad-repo/nullplayer) into .agents/skills/window-census in your project. Codex loads it when a task matches its description.
Can I use Window Census 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 ad-repo/nullplayer --skill window-census -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/window-census, .gemini/skills/window-census, .github/skills/window-census and .opencode/skills/window-census in your project.
What does Window Census need to run?
Going by SKILL.md and its folder, Window Census needs the command-line tools its instructions call (sqlite3).
Does Window Census 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 Window Census 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 Window Census use?
Window Census has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Window Census use?
About 1.2k tokens (SKILL.md is roughly 4.9k 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 Window Census?
Skills that share tags, products or a category with Window Census: Terminal Opener (affaan-m/ECC, 276k stars), Windows Desktop E2E (affaan-m/ECC, 276k stars), Windows Desktop E2E (affaan-m/ECC, 276k stars) and Open Federation (ruvnet/ruflo, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Window Census?
ad-repo (a GitHub user) maintains it in ad-repo/nullplayer, which has 158 GitHub stars. The repository holds 40 skills in this directory. The repository was last updated on October 10, 2026.
Source: ad-repo/nullplayer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.