Spaces

A skill for managing spaces and their space.yaml files. A space is a selectable workspace that can contain widgets and related settings.

In plain words
What is it for?
Use it to list, open, create, read, update, or remove spaces, and to hand off work involving widgets in the currently open space.
Why use it?
It provides the operations needed to find the right space and keep its title, icon, instructions, and contents organized.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/agent0ai/space-agent/spaces
Any agent
npx skills add agent0ai/space-agent --skill spaces
Clone the repo
git clone --depth 1 https://github.com/agent0ai/space-agent

Made for: Claude Code, Codex.

Per session 11 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 439 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00011 $0.00439
Opus 5 $0.00005 $0.00219
Sonnet 5 $0.00002 $0.00088
Haiku 4.5 $0.00001 $0.00044

Measured 3d ago against content hash 35246b911b35, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

Spaces scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • Spaces — 100% identical, 14 lines differ
app/L0/_all/mod/_core/spaces/ext/skills/spaces/SKILL.md · 56 lines

What it actually says

Use this skill for space selection and space.yaml work

transient

  • Available Spaces in _____transient lists spaces (id|title)↓
  • when a current space is open, Current Space Widgets summarizes the live widget layout for that space
  • after widget writes or reloads, Current Widget is the last edited widget envelope

main helpers

  • listSpaces()
  • openSpace(id)
  • createSpace({ title? })
  • removeSpace(id)
  • readSpace(id)
  • saveSpaceMeta({ id, title?, icon?, icon_color?, agent_instructions? })

space selection

  • listSpaces() returns plain objects. Available Spaces is the lightweight prompt readback with id|title rows
  • If the user already named a target space clearly, list spaces, match that visible title to an id, and use that id directly
  • Prefer the exact id returned by listSpaces() or shown in Available Spaces
  • Do not ask which space if the visible title match is already unique
  • Do not invent a different id when the current list already showed the right one

current-space handoff

  • widget creation or editing inside the current open space belongs to the auto-loaded space-widgets skill
  • if the request is about the current open space itself, stay on it instead of reopening it
  • use this skill for space CRUD, navigation, and space.yaml; use current-space widget helpers only for widget work

examples Loading the spaces list _____javascript return await space.spaces.listSpaces()

Opening the selected space _____javascript return await space.spaces.openSpace("space-7")

Creating a new space _____javascript return await space.spaces.createSpace({ title: "Research" })

Reading the current space file _____javascript return await space.spaces.readSpace("space-7")

Removing the selected space _____javascript return await space.spaces.removeSpace("space-7")

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 56 lines · 11 tokens per session scan A 35246b911b35

Subscribe to this mod's changes

Spaces is a skill published in the GitHub repository agent0ai/space-agent (1,390 stars, last pushed 2mo ago), licensed MIT. It adds 11 tokens to every session and 439 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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