deepspace

A guide for building and operating real-time collaborative apps with the DeepSpace SDK on Cloudflare Workers. These are apps where people can see shared changes, presence, messages, or edits as they happen.

In plain words
What is it for?
Use it when code imports DeepSpace or RecordRoom, runs its command-line tools, or deploys collaborative apps to app.space.
Why use it?
It provides documented guidance for the SDK’s application setup, deployment, data synchronisation, access control, messaging, and related services.

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/deepdotspace/deepspace-skill/deepspace
Any agent
npx skills add deepdotspace/deepspace-skill --skill deepspace
Clone the repo
git clone --depth 1 https://github.com/deepdotspace/deepspace-skill

Made for: Claude Code, Codex.

Per session 116 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,344 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 $0.00116 $0.03344
Opus 5 $0.00058 $0.01672
Sonnet 5 $0.00023 $0.00669
Haiku 4.5 $0.00012 $0.00334

Measured 2d ago against content hash 9962355c93ba, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

deepspace 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 2d 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.

skills/deepspace/SKILL.md · 272 lines

How it starts

The opening of the file, as written. The whole thing — 272 lines — stays where its author put it; the contents beside it link to each section on GitHub.

DeepSpace

DeepSpace is one package for real-time collaborative apps on Cloudflare Workers. It provides auth, RBAC, synchronized records, messaging, integrations, payments, and deploys to <name>.app.space.

This skill is the bootstrap: how to start, how to operate, and how to consult the documentation. The documentation at https://docs.deep.space is the authority for everything else — it is written to be opinionated, so when it recommends an approach, take that as the default rather than one option among many.

One source authority

Every app has exactly one Git authority — DeepSpace source (packaged, commit-first) or GitHub source (manual; deploys ship the local working tree, dirty bytes included) — and as of v0.26.0 it is inferred from use, never declared. A checkout with a GitHub remote deploys as GitHub, no claim step; the first deepspace push (or an unclaimed app's deploy sync) claims DeepSpace source once, permanently — using it is choosing it, so never run deepspace push on a GitHub-centric app unless the user has chosen to adopt DeepSpace source. deepspace app source is read-only (the old setter refuses source_inferred); there are no transfers. Never maintain two sources of truth, and read the source-control and workspaces docs before any source, push, pull, or clone operation — the docs, not this skill, state what each verb does under each authority.

Sharing and handing over an app

Collaborators and ownership transfer (deepspace app collaborators …, deepspace app transfer …) change who can deploy, read secrets, and own the app. Read the app-identity guide before either — it states exactly what each grant confers and what a transfer takes away — and treat both as decisions to surface to the user, not steps to run in passing.

How to read the documentation

Consult the docs BEFORE building in an area, not after something breaks. The reading procedure:

  1. Fetch the index once per task area: https://docs.deep.space/llms.txt — generated from the docs on every deploy, so it is never stale — lists every page with a one-line summary.
  2. Pick 1–2 pages from it and fetch each as Markdown by appending .md to the page URL (https://docs.deep.space/guides/authentication.md). If the page you picked lacks the answer, do not wander adjacent pages — go to step 3.
  3. To prove whether a topic exists at all, fetch https://docs.deep.space/llms-full.txt once (the whole corpus in one file; each page ends with Source: /route.md) and grep it. A confirmed absence means the docs lag the build — fall back to the installed .d.ts or the CLI's own --help.
  4. For point lookups within known topics, prefer MCP: https://docs.deep.space/mcp exposes documentation_search and documentation_read. Register it when your harness supports MCP servers, e.g. claude mcp add --transport http deepspace-docs https://docs.deep.space/mcp. Search finds the exact section when the topic exists; it cannot tell you a topic is absent — that is what step 3 is for.
  5. For exact type signatures, read the installed packagels node_modules/deepspace/dist/*.d.ts (in the SDK monorepo itself: packages/deepspace/dist/) — authoritative when any doc lags the installed version.

Read the full file on GitHub · 272 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 272 lines · 116 tokens per session scan A 9962355c93ba

Subscribe to this mod's changes

deepspace is a skill published in the GitHub repository deepdotspace/deepspace-skill (5 stars, last pushed 4d ago), licensed MIT. It adds 116 tokens to every session and 3,344 once invoked, about $0.0006 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 2026-08-31.

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