Docs Governance
affaan-m/ECC
Route broad documentation-governance requests to existing ECC skills and run an opt-in, read-only audit of mapped documentation roles, links, ADR indexes, and evidence references.
Run governed MatterSim-v1.0.0-5M energy, force, stress, and optional ASE FIRE relaxation for workspace-local standardized structures.
Custom licenceAuto-check passed
Install Mattersim Relaxation Screening
$ npx skills add Tai609/NebulaMat --skill mattersim-relaxation-screening -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Tai609/NebulaMat mattersim-relaxation-screening --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/Tai609/NebulaMat.git skills-src && mkdir -p .claude/skills && cp -r skills-src/runtime/skills-bundle/mattersim-relaxation-screening .claude/skills/mattersim-relaxation-screening && 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 "mattersim-relaxation-screening" agent skill from https://github.com/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screening into .claude/skills/mattersim-relaxation-screening/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mattersim-relaxation-screening", 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/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screeningType 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 Tai609/NebulaMat --skill mattersim-relaxation-screening -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Tai609/NebulaMat mattersim-relaxation-screening --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Tai609/NebulaMat.git skills-src && mkdir -p .agents/skills && cp -r skills-src/runtime/skills-bundle/mattersim-relaxation-screening .agents/skills/mattersim-relaxation-screening && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "mattersim-relaxation-screening" agent skill from https://github.com/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screening into .agents/skills/mattersim-relaxation-screening/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mattersim-relaxation-screening", 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 Tai609/NebulaMat --skill mattersim-relaxation-screening -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Tai609/NebulaMat mattersim-relaxation-screening --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Tai609/NebulaMat.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/runtime/skills-bundle/mattersim-relaxation-screening .cursor/skills/mattersim-relaxation-screening && 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 "mattersim-relaxation-screening" agent skill from https://github.com/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screening into .cursor/skills/mattersim-relaxation-screening/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mattersim-relaxation-screening", 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/Tai609/NebulaMat.git --path runtime/skills-bundle/mattersim-relaxation-screening--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 Tai609/NebulaMat --skill mattersim-relaxation-screening -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Tai609/NebulaMat mattersim-relaxation-screening --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Tai609/NebulaMat.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/runtime/skills-bundle/mattersim-relaxation-screening .gemini/skills/mattersim-relaxation-screening && 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 "mattersim-relaxation-screening" agent skill from https://github.com/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screening into .gemini/skills/mattersim-relaxation-screening/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mattersim-relaxation-screening", 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 Tai609/NebulaMat mattersim-relaxation-screeningInstalls 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 Tai609/NebulaMat --skill mattersim-relaxation-screening -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Tai609/NebulaMat.git skills-src && mkdir -p .github/skills && cp -r skills-src/runtime/skills-bundle/mattersim-relaxation-screening .github/skills/mattersim-relaxation-screening && 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 "mattersim-relaxation-screening" agent skill from https://github.com/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screening into .github/skills/mattersim-relaxation-screening/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mattersim-relaxation-screening", 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 Tai609/NebulaMat --skill mattersim-relaxation-screening -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Tai609/NebulaMat mattersim-relaxation-screening --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Tai609/NebulaMat.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/runtime/skills-bundle/mattersim-relaxation-screening .opencode/skills/mattersim-relaxation-screening && 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 "mattersim-relaxation-screening" agent skill from https://github.com/Tai609/NebulaMat/tree/main/runtime/skills-bundle/mattersim-relaxation-screening into .opencode/skills/mattersim-relaxation-screening/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mattersim-relaxation-screening", 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
mattersim-relaxation-screening- GitHub stars
- 100
- Token cost
- ~1.6k tokens
- SKILL.md length
- 725 words
- Files
- 3 (incl. references)
- Skills in repo
- 15
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Run governed MatterSim-v1.0.0-5M energy, force, stress, and optional ASE FIRE relaxation for workspace-local standardized structures.
- Works in 7 steps: Select the structure and kind. Use one… → Gate the input provenance. Read the… → Choose cell behavior deliberately. Keep… → …
- A user asks to relax a crystal
- SKILL.md covers Workflow, Parameter Rules, Tool Contract and Failure Handling
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Mattersim Relaxation Screening is an agent skill from Tai609/NebulaMat. Run governed MatterSim-v1.0.0-5M energy, force, stress, and optional ASE FIRE relaxation for workspace-local standardized structures. Use whenever a user asks to relax a crystal, calculate MatterSim energy/forces/stress, screen MatterGen candidates, or evaluate a structure before MatterSim/UMA/VASP.
Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `agents/openai.yaml` and `references/parameter-policy.md`).
The repository describes itself as: NebulaMat scientific materials research workbench.
When your agent uses it
- A user asks to relax a crystal
- Calculate MatterSim energy/forces/stress
- Screen MatterGen candidates
- Evaluate a structure before MatterSim/UMA/VASP
Example prompts
- “/mattersim-relaxation-screening”
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Select the structure and kind. Use one of the adapter kinds: bulk, slab, interface, or molecule. Decide whether the user wants a…
- Gate the input provenance. Read the source run manifest when available (the MatterGen run manifest for MatterGen candidates) and the…
- Choose cell behavior deliberately. Keep relax_cell=false by default for comparable energies and for every slab. Set relax_cell=true only…
- Check the environment. Prefer the governed MCP tool run_mattersim_stability_screen. If using the CLI, use the project entry point…
- Run a bounded request. Create a new output directory inside the active workspace and call the tool with the chosen kind, device…
- Audit the result. Require status=completed and inspect the recorded model id, package version, checkpoint SHA-256, input SHA-256, formula…
- Route conservatively. promote_to_next_stage means only that the relaxation converged and the geometry-change limit passed. A converged…
What it can do on your machine
Read from SKILL.md and the folder at commit c906ed5. 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.
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
Mattersim Relaxation Screening loads about 1.6k tokens when it runs, and up to ~2.6k if it reads all its reference files. Until then it costs about 83 tokens; SKILL.md has 725 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 725 words (~1,596 tokens).
“Treat MatterSim as a first-stage machine-learning force-field proxy. It provides geometry, energy, force, and stress evidence; it does not prove formation stability, energy above hull, aqueous stability, surface stability, synthesizability, or experimental performance.”
- name
- mattersim-relaxation-screening
Files
SKILL.md and 2 other files (references) in runtime/skills-bundle/mattersim-relaxation-screening of Tai609/NebulaMat.
- SKILL.md
- agents/openai.yaml
- references/parameter-policy.md
Open the folder on GitHubat commit c906ed5
Compare with similar skills
Mattersim Relaxation Screening 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 |
|---|---|---|---|---|---|---|
| Mattersim Relaxation Screening this skillTai609/NebulaMat | 100 | — | ~1.6k | Automated safety check: Pass | Custom licence | |
| Docs Governanceaffaan-m/ECC | 277k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Bio Crispr Screens Screen QcFreedomIntelligence/OpenClaw-Medical-Skills | 3.1k | — | ~2.1k | Automated safety check: Pass | None | |
| Energy Procurementaffaan-m/ECC | 277k | 4 repos | ~7.4k | Automated safety check: Pass | Apache-2.0 | |
| Energy Procurementaffaan-m/ECC | 277k | 2 repos | ~2.5k | Automated safety check: Pass | Apache-2.0 | |
| Board Governancesickn33/agentic-awesome-skills | 47k | 1 repos | ~4.1k | Automated safety check: Pass | MIT |
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Questions about Mattersim Relaxation Screening
What does Mattersim Relaxation Screening do?
Run governed MatterSim-v1.0.0-5M energy, force, stress, and optional ASE FIRE relaxation for workspace-local standardized structures. Mattersim Relaxation Screening is an agent skill from Tai609/NebulaMat.0-5M energy, force, stress, and optional ASE FIRE relaxation for workspace-local standardized structures.
When should I use Mattersim Relaxation Screening?
Mattersim Relaxation Screening fits situations like: A user asks to relax a crystal; calculate MatterSim energy/forces/stress; screen MatterGen candidates; evaluate a structure before MatterSim/UMA/VASP.
How do I install Mattersim Relaxation Screening in Claude Code?
Run `npx skills add Tai609/NebulaMat --skill mattersim-relaxation-screening -a claude-code`. Or copy the skill folder (runtime/skills-bundle/mattersim-relaxation-screening in Tai609/NebulaMat) into .claude/skills/mattersim-relaxation-screening in your project. Claude Code loads it when a task matches its description.
How do I install Mattersim Relaxation Screening in Codex?
Run `npx skills add Tai609/NebulaMat --skill mattersim-relaxation-screening -a codex`. Or copy the skill folder (runtime/skills-bundle/mattersim-relaxation-screening in Tai609/NebulaMat) into .agents/skills/mattersim-relaxation-screening in your project. Codex loads it when a task matches its description.
Can I use Mattersim Relaxation Screening 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 Tai609/NebulaMat --skill mattersim-relaxation-screening -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mattersim-relaxation-screening, .gemini/skills/mattersim-relaxation-screening, .github/skills/mattersim-relaxation-screening and .opencode/skills/mattersim-relaxation-screening in your project.
What does Mattersim Relaxation Screening need to run?
SKILL.md names no scripts, command-line tools or credentials: Mattersim Relaxation Screening is instructions for the agent only.
Does Mattersim Relaxation Screening 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 Mattersim Relaxation Screening 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 Mattersim Relaxation Screening use?
Mattersim Relaxation Screening 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 Mattersim Relaxation Screening use?
About 1.6k tokens (SKILL.md is roughly 6.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 981 tokens, read only when the agent opens those files.
What are the alternatives to Mattersim Relaxation Screening?
Skills that share tags, products or a category with Mattersim Relaxation Screening: Docs Governance (affaan-m/ECC, 277k stars), Bio Crispr Screens Screen Qc (FreedomIntelligence/OpenClaw-Medical-Skills, 3.1k stars), Energy Procurement (affaan-m/ECC, 277k stars) and Energy Procurement (affaan-m/ECC, 277k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Mattersim Relaxation Screening?
Tai609 (a GitHub user) maintains it in Tai609/NebulaMat, which has 100 GitHub stars. The repository holds 15 skills in this directory. The repository was last updated on September 6, 2026.
Source: Tai609/NebulaMat on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.