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Agent skill

Canonical Schema

by NxcoreAI in NxcoreAI/EverRoom

canonical schema 字段语义与各 provider 原始格式要点（gmail/outlook/google-calendar）。产出格式映射时使用。

Custom licenceAuto-check passedProductivity & Automation

Install Canonical Schema

skills CLI
$ npx skills add NxcoreAI/EverRoom --skill canonical-schema -a claude-code

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

GitHub CLI
$ gh skill install NxcoreAI/EverRoom canonical-schema --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/NxcoreAI/EverRoom.git skills-src && mkdir -p .claude/skills && cp -r skills-src/agents/connector-mapper/skills/canonical-schema .claude/skills/canonical-schema && 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
canonical-schema
GitHub stars
3k
Token cost
~895 tokens
SKILL.md length
231 words
Files
1
Skills in repo
17
Repo updated
First seen
Licence
Custom licence

At a glance

canonical schema 字段语义与各 provider 原始格式要点（gmail/outlook/google-calendar）。产出格式映射时使用。

  • Tasks that involve Email management
  • SKILL.md covers 邮件（recordKind = "mail"）, 日程（recordKind = "calendar"）, gmail（映射输入 = Gmail REST 资源形状） and outlook（映射输入 = Microsoft Graph…, plus 1 more section
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Canonical Schema is an agent skill from NxcoreAI/EverRoom. canonical schema 字段语义与各 provider 原始格式要点（gmail/outlook/google-calendar）。产出格式映射时使用。

Its SKILL.md is about 900 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Productivity & Automation, covering Email management. It works with Gmail and Google Calendar. The repository describes itself as: EverRoom - A workspace that remembers your projects, decisions, and sources.

When your agent uses it

  • Tasks that involve Email management

Example prompts

  • “/canonical-schema”

What it can do on your machine

Read from SKILL.md and the folder at commit b0d58e5. 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

Canonical Schema loads about 895 tokens when it runs. Until then it costs about 25 tokens; SKILL.md has 231 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~25
When it runs · the whole SKILL.md, loaded when a task matches
~895

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 231 words (~895 tokens).

name
canonical-schema

Read the full SKILL.md on GitHub

Files

Just SKILL.md in agents/connector-mapper/skills/canonical-schema of NxcoreAI/EverRoom.

Open the folder on GitHubat commit b0d58e5

Compare with similar skills

Canonical Schema 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.

Canonical Schema compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Canonical Schema this skillNxcoreAI/EverRoom3k—~895Automated safety check: PassCustom licence
Google Workspaceyc-software/qm15k—~1.8kAutomated safety check: PassMIT
Composio Cloud Toolsquarqlabs/argus279—~543Automated safety check: PassApache-2.0
Flowhunt Skillsickn33/agentic-awesome-skills47k1 repos~1.3kAutomated safety check: PassMIT
Triage Inboxpedrohcgs/claude-code-my-workflow1.7k—~2.7kAutomated safety check: NotesMIT
Watchervellum-ai/vellum-assistant1.4k—~1.7kAutomated safety check: PassMIT

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  • Google Workspace

    yc-software/qm

    Read and act on the user's Gmail, Google Calendar, and Google Tasks through per-user OAuth.

    15k GitHub stars~1.8k tokensUpdated today
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    Routes requests to external SaaS apps such as GitHub, Gmail, Google Calendar, Slack, Notion and Linear through cloud tools, with safeguards on irreversible actions.

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    1.7k GitHub stars~2.7k tokensUpdated 12 days ago
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  • Watcher

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  • Xs Google Workspace

    karaage0703/ai-assistant-workspace

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  • Document Cursor Completion

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  • Room Overview

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Works with

Categories

Questions about Canonical Schema

What does Canonical Schema do?

canonical schema 字段语义与各 provider 原始格式要点（gmail/outlook/google-calendar）。产出格式映射时使用。. Canonical Schema is an agent skill from NxcoreAI/EverRoom.

When should I use Canonical Schema?

Canonical Schema fits situations like: tasks that involve Email management.

How do I install Canonical Schema in Claude Code?

Run `npx skills add NxcoreAI/EverRoom --skill canonical-schema -a claude-code`. Or copy the skill folder (agents/connector-mapper/skills/canonical-schema in NxcoreAI/EverRoom) into .claude/skills/canonical-schema in your project. Claude Code loads it when a task matches its description.

How do I install Canonical Schema in Codex?

Run `npx skills add NxcoreAI/EverRoom --skill canonical-schema -a codex`. Or copy the skill folder (agents/connector-mapper/skills/canonical-schema in NxcoreAI/EverRoom) into .agents/skills/canonical-schema in your project. Codex loads it when a task matches its description.

Can I use Canonical Schema 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 NxcoreAI/EverRoom --skill canonical-schema -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/canonical-schema, .gemini/skills/canonical-schema, .github/skills/canonical-schema and .opencode/skills/canonical-schema in your project.

What does Canonical Schema need to run?

SKILL.md names no scripts, command-line tools or credentials: Canonical Schema is instructions for the agent only.

Does Canonical Schema 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 Canonical Schema 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 Canonical Schema use?

Canonical Schema 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 Canonical Schema use?

About 895 tokens (SKILL.md is roughly 3.6k 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 Canonical Schema?

Skills that share tags, products or a category with Canonical Schema: Google Workspace (yc-software/qm, 15k stars), Composio Cloud Tools (quarqlabs/argus, 279 stars), Flowhunt Skill (sickn33/agentic-awesome-skills, 47k stars) and Triage Inbox (pedrohcgs/claude-code-my-workflow, 1.7k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Canonical Schema?

NxcoreAI (a GitHub organization) maintains it in NxcoreAI/EverRoom, which has 2,984 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 9, 2026.

Source: NxcoreAI/EverRoom on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.