Agent Skill
Grounded Vault skill
grounded-vaultwshobson/agentsplugins/documentation-standards/skills/grounded-vault/SKILL.md
Use when maintaining a durable Markdown knowledge store that agents compile from sources, when every number or quote in a wiki page must trace back to an immutable source, or when compiled pages need cheap drift detection against the code they describe. Teaches the raw/wiki/archive layout, per-claim provenance links, and git fingerprints for zero-token staleness checks.
always on
75 tokname + description
once used
1,198 tokSKILL.md body
bundled files
18 KB
repo stars
42kGitHub
Install the Grounded Vault skill
Skills CLI (Claude Code, Codex, Cursor and others)
npx skills add https://github.com/wshobson/agents --skill grounded-vault
Claude Code, by hand (all projects)
git clone --depth 1 https://github.com/wshobson/agents.git /tmp/agents mkdir -p ~/.claude/skills cp -R /tmp/agents/plugins/documentation-standards/skills/grounded-vault ~/.claude/skills/grounded-vault
For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.
What it costs your context
Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.
| When | What loads | Cost |
|---|---|---|
| Every session | Name and description | 75 tok |
| When the agent uses it | The SKILL.md instructions | 1,198 tok |
| Only if opened | 1 bundled files (8 KB) | varies |
Until it is used, grounded-vault costs about 18× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 150 skills from wshobson/agents would load 7,688 tokens of descriptions. Skills vs MCP study
Checks
Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.
Checked 2026-10-22 · method
What's inside
The headings of its SKILL.md. Read the full file on GitHub.
- Grounded Vault
- When to Use
- The three layers
- Page header contract
- Grounding rule
- Drift detection
- Workflow
- Commit gate
- Going deeper
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