cross-squad

Context

Read this FIRST any time the user says "squad" as a thing to spawn, delegate to, address, or fan out to — e.g., "spawn two squads of designers and devs", "ask the other squad", "delegate to a squad". In Squad-PRODUCT vocabulary, "squad" is a peer (an independent installation with its own .squad/, team.md, MCP server, and agents) — NOT a generic English synonym for "team" or "group". Do not fan out raw task agents inside your own coordinator context when the user means "another squad". Use the discovery and communication patterns below (and the companion cross-squad-communication skill for the actual protocols).

When an organization runs multiple Squad instances (e.g., platform-squad, frontend-squad, data-squad), those squads need to discover each other, share context, and hand off work across repository boundaries. This skill teaches agents how to coordinate across squads without creating tight coupling.

Companion skill — for protocol details: cross-squad-communication/SKILL.md covers the four communication patterns (synchronous CLI, read-only knowledge query, git-based async, and GitHub-issue-based delegation) once a peer squad is discovered via the registry below. This skill answers "who?" — the companion answers "how?".

Cross-squad orchestration applies when:

• A task requires capabilities owned by another squad
• An architectural decision affects multiple squads
• A feature spans multiple repositories with different squads
• A squad needs to request infrastructure, tooling, or support from another squad

Disambiguation: "squad" vs ad-hoc agents

When the user uses the word "squad" / "squads" or asks to "spawn a team", the coordinator MUST treat it as a literal reference to a Squad install (a .squad/ directory with its own roster, casting, and coordinator) — NOT as a casual synonym for "a group of sub-agents".

Default behaviour (apply unless explicitly told otherwise)

User says	Coordinator does
"spawn two squads of X and Y" / "set up squads for X, Y, Z"	Bootstrap N real Squad installs — separate folder + git init + squad init per squad — then use the cross-squad patterns below (.squad/manifest.json, squad registry add, squad delegate) and the protocols in the cross-squad-communication skill
"ask the other squad about X" / "delegate to the data squad"	Discover the peer via squad registry list (or by reading a known .squad/manifest.json), then use cross-squad-communication Pattern 0 / 1 / 2 / 3 — never re-implement the protocol with task
"spawn a few agents to do X" / "have some agents review X" / "in parallel, get sub-agents to..."	Ad-hoc task fan-out is fine — no .squad/ bootstrap needed. This is the only path where raw task is appropriate when the user mentioned a multi-agent activity

Ambiguous? ask_user, never silently downgrade

If the request could be either interpretation AND bootstrapping real squads is non-trivial (more than one or two squad init runs), you MUST use the ask_user tool with a 2-choice prompt before proceeding:

question: "Should I create separate Squad installs or just dispatch ad-hoc agents?"
choices:
  - "Real squads — separate .squad/ per squad (heavier, persistent, can be re-engaged later)"
  - "Ad-hoc agents — one-shot `task` dispatch (lighter, ephemeral, no .squad/ created)"

The cost of asking is one ask_user. The cost of getting it wrong is the user has to redo the work. Never silently pick the cheaper option just because it feels disproportionate for the task size — surface the trade-off and let the user pick.

Anti-patterns (every one of these is a real failure mode observed in production)

• Calling task sub-agents "squad-alpha" / "squad-beta" and treating them as squads. Naming something a squad doesn't make it one — a squad has its own .squad/, team.md, MCP server, and coordinator. If those aren't there, it's not a squad.
• Matching a prior session's ad-hoc pattern without re-checking current intent. If you see existing reviews/squad-alpha/ folders from a previous run, that's a hint, NOT a contract — the user may have meant something different this time. Re-evaluate from scratch.
• Silently choosing the cheaper interpretation because "bootstrapping two real squads for a 30-line app feels disproportionate". That's a judgment call for the USER to make, not the coordinator. Use ask_user.
• Loading the cross-squad skill, reading it, then doing task fan-out anyway because the eager-execution / parallel-fan-out doctrine pulled you back. The disambiguation rule on this page OVERRIDES the generic fan-out doctrine when "squad" was the trigger.

Patterns

Discovery via Manifest

Each squad publishes a .squad/manifest.json declaring its name, capabilities, and contact information. Squads discover each other through two mechanisms:

1. .squad/squad-registry.json — discovery-only. Peer squads are findable via squad discover and addressable via squad delegate, but their skills/decisions/wisdom are NOT loaded into your coordinator. Manage with squad registry add/list/remove.
2. .squad/upstream.json — discovery + inheritance. Squads listed here are also discoverable, AND your coordinator inherits their skills/decisions/wisdom/routing at session start. Manage with squad upstream add/list/remove/sync.

Both forms read the peer's manifest via the same code path. The path field is the repository root (e.g. ../friend-repo), and Squad appends .squad/manifest.json internally. Pointing at the .squad/ directory works too — Squad accepts both forms (readManifest strips a trailing .squad if present).

{
  "name": "platform-squad",
  "version": "1.0.0",
  "description": "Platform infrastructure team",
  "capabilities": ["kubernetes", "helm", "monitoring", "ci-cd"],
  "contact": {
    "repo": "org/platform",
    "labels": ["squad:platform"]
  },
  "accepts": ["issues", "prs"],
  "skills": ["helm-developer", "operator-developer", "pipeline-engineer"]
}

Context Sharing

When delegating work, share only what the target squad needs:

• Capability list: What this squad can do (from manifest)
• Relevant decisions: Only decisions that affect the target squad
• Handoff context: A concise description of why this work is being delegated

Do NOT share:

• Internal team state (casting history, session logs)
• Full decision archives (send only relevant excerpts)
• Authentication credentials or secrets

Work Handoff Protocol

1. Check manifest: Verify the target squad accepts the work type (issues, PRs)
2. Create issue: Use gh issue create in the target repo with:
   • Title: [cross-squad] <description>
   • Label: squad:cross-squad (or the squad's configured label)
   • Body: Context, acceptance criteria, and link back to originating issue
3. Track: Record the cross-squad issue URL in the originating squad's orchestration log
4. Poll: Periodically check if the delegated issue is closed/completed

Feedback Loop

Track delegated work completion:

• Poll target issue status via gh issue view
• Update originating issue with status changes
• Close the feedback loop when delegated work merges

Examples

Registering a peer squad (no inheritance)

# Friend's repo is checked out at ../friend-platform/
squad registry add platform-squad ../friend-platform

# Verify
squad registry list
squad discover

Discovering squads

# List all squads discoverable from registry + upstreams
squad discover

# Output:
#   platform-squad  →  org/platform  (kubernetes, helm, monitoring)
#   frontend-squad  →  org/frontend  (react, nextjs, storybook)
#   data-squad      →  org/data      (spark, airflow, dbt)

Delegating work

# Delegate a task to the platform squad
squad delegate platform-squad "Add Prometheus metrics endpoint for the auth service"

# Creates issue in org/platform with cross-squad label and context

Manifest in squad.config.ts

export default defineSquad({
  manifest: {
    name: 'platform-squad',
    capabilities: ['kubernetes', 'helm'],
    contact: { repo: 'org/platform', labels: ['squad:platform'] },
    accepts: ['issues', 'prs'],
    skills: ['helm-developer', 'operator-developer'],
  },
});

Anti-Patterns

• Direct file writes across repos — Never modify another squad's .squad/ directory. Use issues and PRs as the communication protocol.
• Tight coupling — Don't depend on another squad's internal structure. Use the manifest as the public API contract.
• Unbounded delegation — Always include acceptance criteria and a timeout. Don't create open-ended requests.
• Skipping discovery — Don't hardcode squad locations. Use manifests and the discovery protocol.
• Sharing secrets — Never include credentials, tokens, or internal URLs in cross-squad issues.
• Circular delegation — Track delegation chains. If squad A delegates to B which delegates back to A, something is wrong.