onplana-project-planner

onplana-project-planner is a skill for Claude Code from Onplana/onplana-mcp-server. It costs 133 tokens per session (3,623 once invoked), scanned A, original, MIT.

A project-planning guide that turns a goal or brief into a written plan and a structured set of tasks in Onplana, a project-management platform.

In plain words
What is it for?
Use it to create an executable project plan that a person or another agent can carry out.
Why use it?
It breaks broad work into tasks, smaller steps, dates, dependencies, owners, tests, and follow-up work affected by a change.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions Claude Code; mentions Codex.

Part of the onplana plugin — 2 skills, 1 command shipped together

Good fit Use it to create an executable project plan that a person or another agent can carry out.

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Install with agentmods
npx agentmods add skills/onplana/onplana-mcp-server/onplana-project-planner
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.

Any agent
npx skills add Onplana/onplana-mcp-server --skill onplana-project-planner
Clone the repo
git clone --depth 1 https://github.com/Onplana/onplana-mcp-server

Made for: Claude Code.

Or install onplana, the plugin that ships this one along with the rest of its 2 skills, 1 command.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for onplana-project-planner

README.md
[![agentmods](https://agentmods.dev/badge/skills/onplana/onplana-mcp-server/onplana-project-planner/github.svg)](https://agentmods.dev/skills/onplana/onplana-mcp-server/onplana-project-planner)
Your own site
<a href="https://agentmods.dev/skills/onplana/onplana-mcp-server/onplana-project-planner"><img src="https://agentmods.dev/badge/skills/onplana/onplana-mcp-server/onplana-project-planner/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for onplana-project-planner

Your own site · 80×15
<a href="https://agentmods.dev/skills/onplana/onplana-mcp-server/onplana-project-planner"><img src="https://agentmods.dev/badge/skills/onplana/onplana-mcp-server/onplana-project-planner.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 133 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,623 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00133 $0.03623
Opus 5 $0.00067 $0.01811
Sonnet 5 $0.00027 $0.00725
Haiku 4.5 $0.00013 $0.00362

Measured 11d ago against content hash 00129cdb8bd5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

onplana-project-planner 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 11d 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.

plugins/onplana/skills/onplana-project-planner/SKILL.md · 278 lines

How it starts

The opening of the file, as written. The whole thing — 278 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Onplana project planner

This skill teaches a connected AI agent how to turn a goal into a real, runnable plan inside Onplana: a written plan document attached to the project, and a task tree (with dates, dependencies, owners, test cases, and downstream-surface tasks) that another agent or a human can pick up and execute. Onplana is a project-management platform you reach through its MCP server.

It is the front half of a pair. This skill builds the plan; the onplana-autonomous-agent skill runs it. You do NOT need to memorize the tool catalog, Onplana introspects itself: call agent_bootstrap first, then describe_capabilities / describe_schema / lookup_help_topic / search_org_knowledge whenever you need detail.

1. Connect and cold start

Connection is identical to the execution skill: the server is https://mcp.onplana.com/mcp, auth is a Bearer personal access token minted under Settings → Agents → Connect an agent. See the onplana-autonomous-agent skill, section 1, for the per-client setup (Claude Code / ChatGPT / Codex / claude.ai).

Every session, start the same two ways:

  1. agent_bootstrap: identity, capabilities, entity-name index, assigned-task count. Follow its nextSteps.
  2. whoami: confirm which org, your role, and your project scope. Planning creates a lot of objects (a project, tasks, assignments), so know up front whether your token is org-wide or scoped to specific projects. A 402 (plan/quota) or 403 (permission/scope) is a boundary, not a bug: log it, skip that action, keep going.

2. The planning method (the pipeline)

Planning is a pipeline, not a single call. The order matters because each stage feeds the next:

Frame → write plan.md → decompose → schedule → assign → test cases → downstream surfaces → review → hand off.

Autonomy modes. Default is high: build the whole plan, then report. If a human prefixes the run with autonomy: guided, draft each stage and wait for a go-ahead before you commit it (especially before creating the task tree and before assigning real people). When unsure which mode you are in, ask once, then proceed.

Read the full file on GitHub · 278 lines

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. 11d ago First seen · 278 lines · 133 tokens per session scan A 00129cdb8bd5

Subscribe to this mod's changes

onplana-project-planner is a skill published in the GitHub repository Onplana/onplana-mcp-server (4 stars, last pushed 15d ago), licensed MIT. It adds 133 tokens to every session and 3,623 once invoked, about $0.0007 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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