cairn-archive

cairn-archive is a skill for Claude Code from sdotj/sleeper-bot. It costs 28 tokens per session (485 once invoked), scanned A, a copy of cairn-archive, MIT.

A procedure for moving a finished Cairn change into the project’s dated archive after its tasks, quality checks, and acceptance checks are complete.

In plain words
What is it for?
Checking that all tasks are done, rerunning project checks, archiving the change, and updating related documentation or references.
Why use it?
It prevents unfinished or unverified work from being treated as complete and keeps the active change list clean.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

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.

agentmods
npx agentmods add skills/sdotj/sleeper-bot/cairn-archive
Any agent
npx skills add sdotj/sleeper-bot --skill cairn-archive
Clone the repo
git clone --depth 1 https://github.com/sdotj/sleeper-bot

Made for: Claude Code.

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 cairn-archive

README.md
[![agentmods](https://agentmods.dev/badge/skills/sdotj/sleeper-bot/cairn-archive.svg)](https://agentmods.dev/skills/sdotj/sleeper-bot/cairn-archive)
Your own site
<a href="https://agentmods.dev/skills/sdotj/sleeper-bot/cairn-archive"><img src="https://agentmods.dev/badge/skills/sdotj/sleeper-bot/cairn-archive.svg" alt="Measured on agentmods" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 485 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00028 $0.00485
Opus 5 $0.00014 $0.00243
Sonnet 5 $0.00006 $0.00097
Haiku 4.5 $0.00003 $0.00049

Measured 5d ago against content hash bcdff04bab3c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

cairn-archive 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 5d 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.

Origin

This is a copy

100% identical to cairn-archive — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/skills/cairn-archive/SKILL.md · 66 lines

What it actually says

Archive a completed change: move it to the dated archive.

Prerequisites

  • All tasks in tasks.md are marked complete
  • cairn change accept <change-id> has passed
  • The project's own quality gates pass (the repository's instructions, its gates: config, or its ordinary build and test commands for its language)

Steps

  1. Identify the change to archive

    If not specified, list active changes:

    ls meta/changes/
    
  2. Verify completion: every task in meta/changes/<change-id>/tasks.md is checked. When one is not, stop and report: a change with pending tasks stays active.

  3. Run final verification

    Re-run the project's own gates so the archive lands on a clean tree. Use the same commands the repository documents for itself, in its own language.

  4. Archive the change

    Run the archive command. It validates the change against the current graph, applies the blueprint delta, refreshes generated output, logs the archival, and moves the change into the dated archive directory:

    cairn change archive <change-id>
    
  5. Update any references: check cairn.blueprint (changes blocks), README.md, and other documentation; update or remove stale references.

  6. Commit the archive

    Read the touched paths from git status --short first, then stage exactly those (never git add -A or git add ., which would sweep in unrelated untracked files):

    git add <each path the archive touched>
    git commit -m "archive(change): move <change-id> to archive"
    

Guardrails

  • Preserve the change directory structure in the archive (proposal.md, design.md, tasks.md, specs/).
  • The archive is permanent history: never edit archived changes.
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. 5d ago First seen · 66 lines · 28 tokens per session scan A bcdff04bab3c

Subscribe to this mod's changes

cairn-archive is a skill published in the GitHub repository sdotj/sleeper-bot (0 stars, last pushed yesterday), licensed MIT. It adds 28 tokens to every session and 485 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to cairn-archive, differing in 0 lines, and is treated as a copy.

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