CCPM Project Management
automazeio/ccpm
Runs a spec-driven workflow from PRD to epic to GitHub issues to parallel agents, with status, standup and blocked-work reports from bundled scripts.
Break a milestone into discrete tasks. An agent skill from mattolson/agent-sandbox.
Install Plan Milestone
$ npx skills add mattolson/agent-sandbox --skill plan-milestone -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install mattolson/agent-sandbox plan-milestone --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/mattolson/agent-sandbox.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/plan-milestone .claude/skills/plan-milestone && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "plan-milestone" agent skill from https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestone into .claude/skills/plan-milestone/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "plan-milestone", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestoneType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add mattolson/agent-sandbox --skill plan-milestone -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install mattolson/agent-sandbox plan-milestone --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mattolson/agent-sandbox.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/plan-milestone .agents/skills/plan-milestone && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "plan-milestone" agent skill from https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestone into .agents/skills/plan-milestone/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "plan-milestone", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mattolson/agent-sandbox --skill plan-milestone -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install mattolson/agent-sandbox plan-milestone --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mattolson/agent-sandbox.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/plan-milestone .cursor/skills/plan-milestone && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "plan-milestone" agent skill from https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestone into .cursor/skills/plan-milestone/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "plan-milestone", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/mattolson/agent-sandbox.git --path .agents/skills/plan-milestone--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add mattolson/agent-sandbox --skill plan-milestone -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install mattolson/agent-sandbox plan-milestone --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mattolson/agent-sandbox.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/plan-milestone .gemini/skills/plan-milestone && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "plan-milestone" agent skill from https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestone into .gemini/skills/plan-milestone/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "plan-milestone", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install mattolson/agent-sandbox plan-milestoneInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add mattolson/agent-sandbox --skill plan-milestone -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/mattolson/agent-sandbox.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/plan-milestone .github/skills/plan-milestone && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "plan-milestone" agent skill from https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestone into .github/skills/plan-milestone/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "plan-milestone", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add mattolson/agent-sandbox --skill plan-milestone -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install mattolson/agent-sandbox plan-milestone --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/mattolson/agent-sandbox.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/plan-milestone .opencode/skills/plan-milestone && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "plan-milestone" agent skill from https://github.com/mattolson/agent-sandbox/tree/main/.agents/skills/plan-milestone into .opencode/skills/plan-milestone/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "plan-milestone", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
plan-milestone- GitHub stars
- 208
- Token cost
- ~1.1k tokens
- SKILL.md length
- 388 words
- Files
- 1
- Skills in repo
- 6
- Repo updated
- First seen
- Licence
- MIT
At a glance
Break a milestone into discrete tasks. An agent skill from mattolson/agent-sandbox.
- Works in 6 steps: Context Review → Learnings Review → Task Identification → …
- Starting work on a milestone that has been defined in the project plan
- SKILL.md covers Inputs, Output, Process and Milestone Plan Template
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Plan Milestone is an agent skill from mattolson/agent-sandbox. Break a milestone into discrete tasks. Use when starting work on a milestone that has been defined in the project plan.
Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Product & Project Management, covering Project management. The repository describes itself as: Secure local dev environment for collaboration with AI coding agents. The licence is MIT.
When your agent uses it
- Starting work on a milestone that has been defined in the project plan
- Tasks that involve Project management
Example prompts
- “/plan-milestone”
Workflow steps
6 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit c5b65e7. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Plan Milestone loads about 1.1k tokens when it runs. Until then it costs about 34 tokens; SKILL.md has 388 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from mattolson/agent-sandbox at commit c5b65e7, republished under its MIT licence (© mattolson). 388 words, ~1,066 tokens.
Download SKILL.mdSave it as
.claude/skills/plan-milestone/SKILL.md (or your agent's skills folder).- name
- plan-milestone
- description
- Break a milestone into discrete tasks. Use when starting work on a milestone that has been defined in the project plan.
Milestone Planning
Part of the three-tier planning system. See /plan for an overview.
This skill breaks a milestone into discrete, implementable tasks. The output is a milestone plan that sequences work and identifies dependencies.
Inputs
Before starting, read:
docs/plan/project.md- to understand the milestone's context and goalsdocs/plan/learnings.md- to incorporate lessons from previous work- Any relevant decision documents in
docs/plan/decisions/
Output
The final artifact is docs/plan/milestones/{milestone}/milestone.md.
The milestone plan can be updated as work progresses. When task scope changes significantly, update the task definition but also record the change in a Changes section. This preserves history for milestone retrospectives while keeping the plan current.
Process
Work through these phases interactively. Each phase should be a conversation.
Phase 1: Context Review
Review the milestone's definition from the project plan.
- What is this milestone's goal?
- What are its boundaries (what's in scope, what's not)?
- What dependencies does it have on prior milestones?
- What does completion look like?
Confirm understanding before proceeding.
Phase 2: Learnings Review
Review accumulated learnings that may apply to this milestone.
- What lessons from previous work are relevant here?
- Are there process improvements to apply?
- Are there technical pitfalls to avoid?
Note applicable learnings in the milestone plan.
Show full SKILL.md (190 more words)Show less
Phase 3: Task Identification
Identify the discrete pieces of work.
- What are the logical units of work?
- Is each task appropriately scoped for a single PR?
- Are tasks independently testable or verifiable?
- What are the natural boundaries between tasks?
A task should map to a well-crafted PR: a piece of functionality or a fix, along with relevant tests, sized appropriately for human peer review. Not so large that review becomes burdensome, not so small that it lacks meaningful context.
Phase 4: Dependency Mapping
Understand how tasks relate to each other.
- Which tasks block other tasks?
- Which tasks can be done in parallel?
- Are there external dependencies (APIs, other teams, etc.)?
- What is the critical path?
Phase 5: Risk Identification
Flag uncertainties specific to this milestone.
- Which tasks have technical unknowns?
- Where might scope be unclear?
- What could cause rework?
- Are there tasks that should be spiked first?
Phase 6: Sequencing
Order the tasks for execution.
- What is the recommended order?
- Where are there decision points that might change the sequence?
- Which tasks should be done early to reduce risk?
Milestone Plan Template
When all phases are complete, compile into docs/plan/milestones/{milestone}/milestone.md:
# Milestone: {identifier} - {name}
## Goal
{What this milestone achieves}
## Scope
{What's included and explicitly excluded}
## Applicable Learnings
{Lessons from previous work that apply here}
## Tasks
### {m1.1-task-name}
**Summary:** {One-sentence description of what this task delivers}
**Scope:**
- {What's included}
- {What's explicitly excluded or deferred}
**Acceptance Criteria:**
- {Condition that must be true when complete}
- {Another condition}
**Dependencies:** {What must be done first}
**Risks:** {Uncertainties or concerns}
### {m1.2-task-name}
**Summary:** {One-sentence description of what this task delivers}
**Scope:**
- {What's included}
- {What's explicitly excluded or deferred}
**Acceptance Criteria:**
- {Condition that must be true when complete}
- {Another condition}
**Dependencies:** {What must be done first}
**Risks:** {Uncertainties or concerns}
{Continue for all tasks}
## Execution Order
{Recommended sequence, noting parallelization opportunities and decision points}
## Risks
{Milestone-level risks and mitigation strategies}
## Definition of Done
{How we know this milestone is complete}
## Changes
{Record significant changes to scope or tasks as they occur}
### {Date}: {Change summary}
{What changed and why}© mattolson, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in .agents/skills/plan-milestone of mattolson/agent-sandbox.
Open the folder on GitHubat commit c5b65e7
Compare with similar skills
Plan Milestone next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Plan Milestone this skillmattolson/agent-sandbox | 208 | — | ~1.1k | Automated safety check: Pass | MIT | |
| CCPM Project Managementautomazeio/ccpm | 8.4k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Uvastral-sh/claude-code-plugins | 313 | 2 repos | ~980 | Automated safety check: Pass | Apache-2.0 | |
| Project Managementkunchenguid/firstmate | 7.7k | — | ~2.1k | Automated safety check: Pass | MIT | |
| Hivemind Goalsactiveloopai/hivemind | 1.6k | — | ~1.7k | Automated safety check: Notes | Apache-2.0 | |
| Ichartjswanghetommy/ichartjs | 352 | — | ~4.2k | Automated safety check: Pass | Apache-2.0 |
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astral-sh/claude-code-plugins
Guide for using uv, the Python package and project manager. An agent skill from astral-sh/claude-code-plugins.
Project Management
kunchenguid/firstmate
Agent-only procedure for Firstmate project management. An agent skill from kunchenguid/firstmate.
Hivemind Goals
activeloopai/hivemind
Create, track and update team goals via the Deeplake virtual filesystem at memory/goal/.
Ichartjs
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Plan, validate, render, explain, and safely edit iChart.js visualizations from tabular, project, or diagram data.
Hivemind Goals
activeloopai/hivemind
Create, track and update team goals in Hivemind via the hivemind CLI.
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Categories
Questions about Plan Milestone
What does Plan Milestone do?
Break a milestone into discrete tasks. An agent skill from mattolson/agent-sandbox. Plan Milestone is an agent skill from mattolson/agent-sandbox. Break a milestone into discrete tasks.
When should I use Plan Milestone?
Plan Milestone fits situations like: starting work on a milestone that has been defined in the project plan; tasks that involve Project management.
How do I install Plan Milestone in Claude Code?
Run `npx skills add mattolson/agent-sandbox --skill plan-milestone -a claude-code`. Or copy the skill folder (.agents/skills/plan-milestone in mattolson/agent-sandbox) into .claude/skills/plan-milestone in your project. Claude Code loads it when a task matches its description.
How do I install Plan Milestone in Codex?
Run `npx skills add mattolson/agent-sandbox --skill plan-milestone -a codex`. Or copy the skill folder (.agents/skills/plan-milestone in mattolson/agent-sandbox) into .agents/skills/plan-milestone in your project. Codex loads it when a task matches its description.
Can I use Plan Milestone in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mattolson/agent-sandbox --skill plan-milestone -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/plan-milestone, .gemini/skills/plan-milestone, .github/skills/plan-milestone and .opencode/skills/plan-milestone in your project.
What does Plan Milestone need to run?
SKILL.md names no scripts, command-line tools or credentials: Plan Milestone is instructions for the agent only.
Does Plan Milestone access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Plan Milestone safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Plan Milestone use?
Plan Milestone is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Plan Milestone use?
About 1.1k tokens (SKILL.md is roughly 4.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Plan Milestone?
Skills that share tags, products or a category with Plan Milestone: CCPM Project Management (automazeio/ccpm, 8.4k stars), Uv (astral-sh/claude-code-plugins, 313 stars), Project Management (kunchenguid/firstmate, 7.7k stars) and Hivemind Goals (activeloopai/hivemind, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Plan Milestone?
mattolson (a GitHub user) maintains it in mattolson/agent-sandbox, which has 208 GitHub stars. The repository holds 6 skills in this directory. The repository was last updated on October 1, 2026.
Source: mattolson/agent-sandbox on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.