How do I install the Plane Foundation skill?

Run npx skillmds@latest add ryan-brosas/plane-foundation in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Plane Foundation safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Plane Foundation?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Plane Foundation free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Plane Foundation?

ryan-brosas (@ryan-brosas) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Plane Foundation by ryan-brosas — Agent Skill

Name: Plane Foundation
Author: ryan-brosas

Plane Foundation

Use when porting multi-instance CRDT document collaboration (a Hocuspocus/Yjs live server bolted onto an HTTP API backend) or SSRF-safe outbound HTTP with signed webhook delivery (fail-closed IP classification, DNS-rebinding-proof pinned fetches, manual redirect ladders, celery delivery/retry/deactivation). Source code and direct tests are ground truth; references carry decisive excerpts and graph retrieval.

ryan-brosas a5b0195 18 files · 72.6 KB Updated Sep 17, 2026

File contents

Plane foundation: realtime collaboration + SSRF-safe outbound/webhook planes

Foundation contract

This is a cold, source-specific foundation, not an operational procedure. It is historical, revision-pinned evidence rather than timeless guidance. Current project source, tests, requirements, and runtime behavior outrank this projection and decide what ships.

Provenance and revision

Source record: plane; portable upstream identity, license, coverage caveats, and retrieval history are preserved in the index.
Recorded revision: preview@e056bbf9eb6b511cdc0a5823b1bd6922e561a485.
Full provenance, coverage caveats, boundaries, and preserved evidence: references/index.md.

Topic map

Representative topics: Bootstrap & shutdown; Empty-binary fetch fallback; Store triage / 413; Force-close choreography; Redis admin bus; Debounced title persistence; Error taxonomy; WS auth ladder.
Scope and retrieval questions: references/index.md#use-this-for.
Complete capsule chooser: references/index.md#load-the-matching-source-dump.
Detailed grouped map: references/index.md#capsule-map.
Source limitations and portability boundaries: references/index.md#boundaries.

Retrieval

Open the index, choose one capsule matching the active question, and load only that capsule. Revalidate its cited source and revision before relying on it. Do not bulk-load the inventory, treat historical claims as current truth, or apply this foundation as a procedure.

Frequently asked questions