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bosun

v0.6.0

Spec-anchored workflow for autonomous coding runs on Claude Fable 5.1: brief, run, verify, checkpoint, with a fable-crew provider mode that routes implementation to gpt-5.6-sol or gpt-5.6-luna. A sibling Codex plugin in codex/ runs the same spec on GPT-6 Astra. Built from Anthropic's Fable 5.1 docs.

Claude Code3 Skills

By Michael Kissinger1 GitHub starsUpdated 2 weeks ago

Directory evidence

Runtimes
Claude Code
Parsed components
3 skill or MCP entries
Source updated
Sep 9, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install bosun for Claude Code

Installs for the current user
claude plugin marketplace add IchenDEV/agent-plugin-mkt
claude plugin marketplace update agent-plugin-marketplace
claude plugin install bosun@agent-plugin-marketplace

Paste and run these commands in a terminal with Claude Code. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/mckissinger/bosun

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

bosun/
├── .claude-plugin/plugin.json
├── skills/bosun-brief/SKILL.md
├── skills/bosun-checkpoint/SKILL.md
└── skills/bosun-verify/SKILL.md

Included Skills3

bosun-briefskills/bosun-brief/SKILL.md

Start substantial coding work on Claude Fable 5.1. On a project with no spec, it creates SPEC.md from the request and whatever structures the user supplies, then stops for review. On a project with a spec, it briefs the next slice (outcome, checkable done-conditions, out-of-scope, assumptions, checks, branch), runs it to completion, verifies, and updates the spec. Use at the start of any task beyond a few tool calls (features, multi-file changes, refactors, migrations, debugging), or when the user says "brief this", "start the project", "next slice", or "run this end to end".

bosun-checkpointskills/bosun-checkpoint/SKILL.md

Save transient session state when stopping mid-slice so the next Claude Code session resumes exactly where this one stopped. The spec holds the durable expectations; the checkpoint holds what the spec does not — position within the current step, problems and how they were handled, options tried and set aside, and details that are hard to reconstruct. Use before stopping mid-task, when the user says "checkpoint", "save state", "hand off", or "we'll continue later".

bosun-verifyskills/bosun-verify/SKILL.md

Independently verify a finished slice in a fresh, read-only context before reporting it done — checks the diff against the spec's done-conditions, runs the project's checks, hunts for bugs, and records verified status in the spec. Use after completing a slice, before opening a PR, or when the user asks "is this actually done", "verify", or "double-check".

Plugin manifests1

.claude-plugin/plugin.json
{
  "name": "bosun",
  "displayName": "Bosun",
  "version": "0.6.0",
  "description": "Spec-anchored workflow for autonomous coding runs on Claude Fable 5.1: brief, run, verify, checkpoint, with a fable-crew provider mode that routes implementation to gpt-5.6-sol or gpt-5.6-luna. A sibling Codex plugin in codex/ runs the same spec on GPT-6 Astra. Built from Anthropic's Fable 5.1 docs.",
  "author": {
    "name": "Michael Kissinger",
    "email": "[email protected]"
  }
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[bosun on Agent Plugins Marketplace](https://pluginsmp.com/plugins/bosun)