init-milestone-base-workflow

init-milestone-base-workflow is a skill for Claude Code from uHappyLogic/cairn. It costs 38 tokens per session (1,143 once invoked), scanned A, original, MIT.

A one-time project setup action for a milestone-based development workflow. It creates the files that track the current milestone and explain the workflow.

In plain words
What is it for?
Use it when starting milestone-based work in a project or adding that workflow to an existing project.
Why use it?
It gives a project a shared place to record milestones without replacing files that are already there.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: mentions CLAUDE.md; mentions Claude Code; installed under .agents/ (shared by several agents).

Part of the cairn plugin — 22 skills, 3 agents shipped together

Good fit Use it when starting milestone-based work in a project or adding that workflow to an existing project.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uhappylogic/cairn/init-milestone-base-workflow
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 uHappyLogic/cairn --skill init-milestone-base-workflow
Clone the repo
git clone --depth 1 https://github.com/uHappyLogic/cairn

Made for: Claude Code.

Or install cairn, the plugin that ships this one along with the rest of its 22 skills, 3 agents.

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 init-milestone-base-workflow

README.md
[![agentmods](https://agentmods.dev/badge/skills/uhappylogic/cairn/init-milestone-base-workflow/github.svg)](https://agentmods.dev/skills/uhappylogic/cairn/init-milestone-base-workflow)
Your own site
<a href="https://agentmods.dev/skills/uhappylogic/cairn/init-milestone-base-workflow"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/init-milestone-base-workflow/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 init-milestone-base-workflow

Your own site · 80×15
<a href="https://agentmods.dev/skills/uhappylogic/cairn/init-milestone-base-workflow"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/init-milestone-base-workflow.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,143 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 $0.00038 $0.01143
Opus 5 $0.00019 $0.00571
Sonnet 5 $0.00008 $0.00229
Haiku 4.5 $0.00004 $0.00114

Measured 3d ago against content hash 5d6a8f017dff, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

init-milestone-base-workflow 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 3d 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.

.agents/plugins/cairn/skills/init-milestone-base-workflow/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

init-milestone-base-workflow

Bootstraps the milestone-driven workflow inside a project. It creates the milestones/ directory and milestones/README.md (with the grep-able Current milestone: pointer line), and ensures CLAUDE.md contains the ## Milestone Workflow guidance. Run this once per project, before any other workflow skill.

This skill is additive and idempotent: it creates missing scaffolding and inserts missing sections into existing files, but never overwrites or rewrites content that is already there. It does not commit — staging is left to the user.

Usage

/init-milestone-base-workflow

No arguments.

Workflow

1. Detect existing state

Probe the workspace root in parallel and record what already exists:

  • Does milestones/ exist?
  • Does milestones/README.md exist? If so, does it contain a Current milestone: line?
  • Does CLAUDE.md exist? If so, read it and note whether it already contains a ## Milestone Workflow section.

Use these findings to decide which steps below are no-ops. If all of the following are already present — milestones/, milestones/README.md, and a Current milestone: line in milestones/README.md — the project is already initialized: report that and stop without changing anything.

2. Create the milestones/ directory

If milestones/ does not exist, create it. Create no milestone_<N>_<slug>/ directory inside it — that is /define-milestone-goal's job.

3. Create milestones/README.md

If milestones/README.md does not exist, create it with this exact structure:

# Milestones

This file is the source of truth for which milestone is current.

Each milestone lives at `milestones/milestone_<N>_<slug>/` and contains:

- `requirements.md` — goal, relevant starting state, decisions, open questions
- `TASKS_TODO.md` — pending tasks ordered by priority (highest first)
- `TASKS_DONE.md` — completed tasks

## Current Milestone

Current milestone: none

## Milestone History

_No milestones completed yet._

## Completed Milestones

| # | Title | Path |
|---|-------|------|

Read the full file on GitHub · 103 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. 3d ago Changed · -7 lines · -25 tokens per session 5d6a8f017dff
  2. 8d ago First seen · 110 lines · 63 tokens per session scan A ec17dbf939cc

Subscribe to this mod's changes

init-milestone-base-workflow is a skill published in the GitHub repository uHappyLogic/cairn (2 stars, last pushed yesterday), licensed MIT. It adds 38 tokens to every session and 1,143 once invoked, about $0.0002 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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