Plane
Plane is a team behavior observatory — synthesize Plane API data into observations about how teams actually behave under pressure (cycle velocity vs. plan, ownership churn, reviewer gate strength, priority drift, cross-project load). Reads from the live mcp__plane MCP server.
- Type
- Plugin
- Repository
- jeremylongshore/tons-of-skills-marketplace
- GitHub stars
- 2.8k
- License
- MIT
- Repo last updated
- Sep 27, 2026
- Version
- 0.3.0
- Author
- Jeremy Longshore
What Plane is
Plane is a plugin published in the jeremylongshore/tons-of-skills-marketplace repository on GitHub, which has about 2.8k stars. The repository describes itself as: “Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com.”
A plugin is a package that bundles skills, slash commands, subagents, hooks, and MCP connectors so they install together. Plugins are plain files with a manifest at .claude-plugin/plugin.json, and they work in both Claude Code and Claude Cowork.
Installing Plane adds everything it ships in one step. Connectors inside a plugin still need to be connected separately, and hooks and subagents only run in Cowork and Claude Code, not in regular chat.
How to install Plane
Claude Code
- Add the repository as a plugin marketplace: claude plugin marketplace add jeremylongshore/tons-of-skills-marketplace
- Install the plugin: claude plugin install plane@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json.
- Restart the session if the new skills or commands don't appear straight away.
Claude Cowork
- Open Customize → Plugins and choose Add marketplace.
- Enter jeremylongshore/tons-of-skills-marketplace (the owner/repo shorthand works for GitHub).
- Find Plane in the list, click Install, then connect any connectors it needs from its Connectors tab.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/productivity/plane/.claude-plugin/plugin.json, shared under the repository's MIT license. Read the full file on GitHub.
> Plane is a team behavior observatory. Most Plane integrations wrap the API for ticket entry; this one synthesizes the data Plane already has into observations about how a team actually behaves under pressure — cycle velocity vs. plan, ownership churn on stuck tickets, reviewer gate strength, stated-vs-actual priority drift, and cross-project workload concentration.
What this plugin is
A behavioral observation layer on top of Plane's project-tracking API. It does not replicate mcp__plane's CRUD surface; that's the data-retrieval layer. This plugin sits one level up — it asks behavioral questions that require JOINing across multiple Plane endpoints to answer.
What this plugin is not
- Not a Plane CLI (use mcp__plane MCP directly for ticket CRUD)
- Not a clone of the Plane web dashboard (the dashboard already shows you ticket state)
- Not a generic project-tracker skill (the framing is specifically behavioral, anchored in the NOI)
The five compound commands
Each answers a question that cannot be answered from any single Plane API endpoint:
Each command's exact endpoint sequence, scoring formula, and output table format is documented in skills/plane/references/compound-commands.md.
Install
/plugin install plane@claude-code-plugins-plusPrerequisites
- mcp__plane MCP server installed and configured (env vars PLANE_API_KEY, PLANE_WORKSPACE_SLUG, PLANE_API_HOST_URL). Without it, the skill returns documentation-only output + an install hint.
- A Plane workspace with at least one project, cycle, and active issues — empty workspaces return informative empty states.
How it works
The orchestrator skill (skills/plane/SKILL.md) routes user intent to one of two agents:
- plane-expert — answers "how do I query X in Plane" without firing live API calls
- plane-analyst — orchestrates the compound commands, calling mcpplane* tools in the documented sequence and synthesizing the result
Both agents read from the references in skills/plane/references/ as their ground truth — noi.md is the design anchor; api-surface.md is the documented endpoint subset; compound-commands.md is the per-command playbook.
Provenance
This plugin was produced by /skill-creator --forge plane on 2026-05-07. The forge run's audit trail lives in .forge/ — research notes, ecosystem analysis, validation evidence — visible to anyone reviewing how the plugin came to exist.
plugin.json carries "generated": true and "author_type": "forge" so the marketplace surfaces a "Forge-generated" provenance pill on the detail page.
License
MIT. See LICENSE (project-wide root file).
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Plane?
Plane is a plugin for Claude Code and Claude Cowork from the jeremylongshore/tons-of-skills-marketplace repository on GitHub. Plane is a team behavior observatory — synthesize Plane API data into observations about how teams actually behave under pressure (cycle velocity vs. plan, ownership churn, reviewer gate strength, priority drift, cross-project load). Reads from the live mcp__plane MCP server.
How do I install Plane in Claude Code?
Add the repository as a plugin marketplace: claude plugin marketplace add jeremylongshore/tons-of-skills-marketplace Install the plugin: claude plugin install plane@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json. Restart the session if the new skills or commands don't appear straight away.
Can I use Plane in Claude Cowork?
Open Customize → Plugins and choose Add marketplace. Enter jeremylongshore/tons-of-skills-marketplace (the owner/repo shorthand works for GitHub). Find Plane in the list, click Install, then connect any connectors it needs from its Connectors tab.
Is Plane safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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