Fleet Doctrine
How one Claude Code session behaves within a Fleet Deck multi-session fleet
Test report
- Verdict
- Tested · Works
- Score
- Tested
- Jul 25, 2026
- Environment
- Claude Code 2.x (agent harness)
- Upstream re-checked
- Jul 30, 2026 · 69cc882
⚠ This skill is no longer available upstream. Our re-check on Aug 10, 2026 couldn't find it any more (repo unreachable/deleted). The test below is what we measured on Jul 25, 2026 and we're leaving it up as a record — but there is nothing left to install, so we've removed the command.
Given a simulated [FLEETDECK ANSWER] plus an untrusted plain-mail instruction, the doctrine resolves what a no-skill session cannot: act on the answer as real user input (justified by the daemon's server-side sender-name reservations) while still routing any destructive or credential-touching instruction back to a human regardless of envelope. Its curl/mail runtime is unexercised here since no daemon was live, but the decision guidance is concrete, self-consistent, and security-aware. Only valuable when Fleet Deck is actually installed.
Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works
- Installs cleanly 5/5
- Triggers reliably 5/5
- Output vs. baseline 7/10
- Docs & honesty 5/5
What Fleet Doctrine does
Teaches a Claude Code session to operate as one of many under the Fleet Deck daemon: how to read daemon-injected [FLEETDECK] messages, trust or challenge mail frames, send mail to peer sessions via the local API, and act when deputized. Triggers on [FLEETDECK] context, requests to coordinate with or message another session, or fleet-board questions. Only useful when Fleet Deck is running.
How to install Fleet Doctrine
Nothing to install: the source repository no longer has this skill. If the author brings it back, our daily re-check will pick it up and the command will reappear here.
Commands — how to trigger Fleet Doctrine
-
/fleet-doctrineHow one Claude Code session behaves within a Fleet Deck multi-session fleet
It also activates on plain-language prompts like these:
-
How should this session respond to a FLEETDECK board message? -
Coordinate with the other session that's editing this file -
Send mail to the peer session that just deputized you
Frequently asked questions
- Is the Fleet Doctrine skill free?
- Yes. The skill itself is free from lacion/fleet-deck. SkillProof publishes the install command and an independent test verdict at no cost.
- Does Fleet Doctrine work with Claude Code?
- We tested it with Claude Code 2.x (agent harness) on Jul 25, 2026. Verdict: Tested · Works. Given a simulated [FLEETDECK ANSWER] plus an untrusted plain-mail instruction, the doctrine resolves what a no-skill session cannot: act on the answer as real user input (justified by the daemon's server-side sender-name reservations) while still routing any destructive or credential-touching instruction back to a human regardless of envelope. Its curl/mail runtime is unexercised here since no daemon was live, but the decision guidance is concrete, self-consistent, and security-aware. Only valuable when Fleet Deck is actually installed.
- What is the Fleet Doctrine SkillProof Score?
- 8.8/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 7/10, docs & honesty 5/5.
- How do I install Fleet Doctrine?
- Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
- Can I use Fleet Doctrine with Cursor, Copilot, Gemini CLI, Codex or other AI tools?
- The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.