finish-current-milestone

finish-current-milestone is a skill for Claude Code from uHappyLogic/cairn. It costs 40 tokens per session (1,346 once invoked), scanned A, original, MIT.

A project-closing command for marking a completed milestone, a defined stage of work, in the project's tracking files.

In plain words
What is it for?
Use it after all work in a milestone is complete to update its records and, when needed, record lasting changes to the project's environment.
Why use it?
It records what was finished and clears the project pointer so the next milestone can be started correctly.

Skill for Claude Code

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

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

Good fit Use it after all work in a milestone is complete to update its records and, when needed, record lasting changes to the project's environment.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/uhappylogic/cairn/finish-current-milestone
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 finish-current-milestone
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 finish-current-milestone

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/uhappylogic/cairn/finish-current-milestone"><img src="https://agentmods.dev/badge/skills/uhappylogic/cairn/finish-current-milestone.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,346 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 $0.00040 $0.01346
Opus 5 $0.00020 $0.00673
Sonnet 5 $0.00008 $0.00269
Haiku 4.5 $0.00004 $0.00135

Measured 3d ago against content hash 4b6a3db37c12, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

finish-current-milestone 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/finish-current-milestone/SKILL.md · 107 lines

How it starts

The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.

finish-current-milestone

Wraps up the current milestone — verifies all tasks are done, records accomplishments in milestones/README.md, clears the current-milestone pointer to "none" in milestones/README.md, and updates CLAUDE.md only if the milestone introduced lasting changes to the project's environment context. It creates or modifies no files in <MILESTONE_DIR>/, and it never invokes /capture-milestone-principle-updates. Run this when all tasks are complete. After this, run /define-milestone-goal to define the next milestone, then /goto-next-milestone to activate it.

Usage

/finish-current-milestone

No arguments.

Workflow

1. Find the current milestone

Follow .agents/plugins/cairn/shared/get-current-milestone.md to resolve <MILESTONE_DIR> from the Current milestone: line in milestones/README.md. If the pointer is none, stop and tell the user there is no active milestone to finish.

Read <MILESTONE_DIR>/requirements.md and extract the milestone title from its top-level # Milestone N: <Title> heading (e.g. # Milestone 1: Public Release Preparation → title "Milestone 1 — Public Release Preparation"). The milestone number N comes from the path slug — strip any leading zeros when parsing it as an integer (e.g. milestone_01_foo → N is 1).

2. Read milestone content

Read in parallel:

  • <MILESTONE_DIR>/requirements.md — to extract the milestone Goal and key decisions.
  • <MILESTONE_DIR>/TASKS_DONE.md — to list what was concretely built.

3. Verify the milestone is done

Check that <MILESTONE_DIR>/TASKS_TODO.md contains no ## sections. If tasks remain, stop and tell the user to complete them first (or move them to the next milestone).

4. Compose the completion summary

Write a short summary (3–8 bullet points) of what was accomplished. Draw from:

  • The Goal section of requirements.md
  • The completed tasks in TASKS_DONE.md
  • Any significant decisions recorded in requirements.md

Keep each bullet to one sentence, factual and grounded in the requirements and completed tasks — never an invented accomplishment. Focus on what now exists in the project, not on process.

Read the full file on GitHub · 107 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 4b6a3db37c12
  2. 5d ago Changed · -9 lines · -14 tokens per session 168378d0c176
  3. 10d ago First seen · 116 lines · 54 tokens per session scan A e3e89fee0d23

Subscribe to this mod's changes

finish-current-milestone is a skill published in the GitHub repository uHappyLogic/cairn (2 stars, last pushed 2d ago), licensed MIT. It adds 40 tokens to every session and 1,346 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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