Agent harnesses assume your work lives in one repo. It doesn't.
Relay lets one agent talk to agents in your other repos — delegate, coordinate, spin up sub-teams — across every codebase you own.

Works natively with cmux. Runs inside your existing Claude or Codex CLI via MCP. Local-first, self-hosted, all state in ~/.relay/ on your machine. No hosted service, no telemetry.

⚠️ Beta — pre-v1. Relay is actively developed and hasn't cut a 1.0 yet. APIs, CLI flags, file layouts under ~/.relay/, and GUI surfaces can change between releases. Expect bugs. If you hit one, please open an issue with a reproduction — or send a PR. Newcomer-friendly work is tagged good first issue; meatier tickets live under help wanted. Pick something up and comment "I'll take this."

Most agent harnesses assume the work lives in one repo. Real product surfaces don't — UI, backend, ML, infra, SDKs each sit in their own codebase. Relay is built around that shape: one orchestrator agent you talk to, reaching into every repo you own, delegating down a tree.

• 🌳 Cross-repo agent-to-agent delegation. You talk to one orchestrator. It reaches into your other repos and delegates to live agents there, who can spin up their own sub-teams. A request like "ship OAuth across UI, backend, and the SDK" fans out as a delegation tree — orchestrator → repo agents → sub-agents — not three uncorrelated chat sessions you babysit. Sessions in different repos discover each other through MCP crosslink tools and exchange messages directly. Parallel agent runners and single-repo orchestrators don't do this; Relay does.
• 📋 One ticket board spans many repos. Tickets carry a dependency DAG and assignedAlias routing — a feature touching 3 repos is one plan with 3 ticket streams, scheduled in order, not 3 disconnected runs. Single-repo orchestrators can't express this.
• 💬 An audit trail falls out of the coordination. Because every cross-repo decision is routed through Relay, you get rationale + alternatives recorded automatically — who chose what, why, what else was considered. Step away for 4 hours, come back to a log that reads like Slack threads for architectural choices. Most harnesses don't persist anything beyond the raw transcript.
• 🗂 GitHub Projects v2 integration (v0.2). Channels project to a GH Projects v2 board automatically — channels become epics, tickets become draft items, with Type / Status / Priority custom fields kept in sync. Relay stays authoritative; drift detected on the GitHub side is logged to the channel feed and overwritten. Paste a Projects item URL into chat and the classifier resolves the project + epic + creates the ticket. See docs/trackers.md.
• 🎛 Three dashboards, one source of truth — no cloud. CLI (rly), ratatui TUI, and Tauri desktop GUI all read the same ~/.relay/ files. No sync layer, no split brain, no hosted service, no telemetry. The chat feed is Slack-shaped, but the GUI is a window onto the delegation tree, not the headline.

Relay turns a sentence, a GitHub issue URL, or a Linear ticket into a running plan of AI-coded work: classify → plan → decompose into a ticket DAG → dispatch to Claude or Codex agents → verify → open PR → track until merged. Every event — tool calls, state changes, decisions — lands in a Slack-style channel feed you can query later.

Suitable for individual developers and teams. CLI: rly.

Where Relay earns its keep today:

1. Multi-repo feature rollouts. You change an API contract in backend, the frontend needs the new payload shape, and the client SDK needs a version bump. One channel, three attached repos, dependency DAG ensures the backend ticket completes before the frontend / SDK work starts. Agents crosslink-message each other as shapes stabilize.

2. Dependency upgrades that ripple. Bumping a shared library across a dozen service repos. One ticket per repo, agents run in parallel (capped by max-concurrency), status on one board. Agents that hit a migration wall post a decision with alternatives before continuing — so the fifth repo's agent inherits the first repo's answer instead of re-solving it.

3. Incident response + post-mortems. Fixes that span services — the api hotfix, the worker retry change, the infra timeout bump. Relay's decision log, with rationale and alternatives per decision, doubles as the post-mortem artifact. Named agents ("Saturn reviewed the migration") give the writeup a coherent narrative instead of agent-3.

4. Long-form refactors. "Migrate every axios call to fetch across 40 repos." One autonomous channel, tickets per repo, approval gates at milestones. Run it with rly run --autonomous <channelId> --budget-tokens 500000 --max-hours 8, step away, come back to a stack of PRs and a decision log showing what each agent chose.

5. Overnight autonomous runs. Queue a backlog Friday evening, run with a budget cap. Monday you have merged PRs plus a decision log showing each architectural choice. Bounded by wall-clock, token budget, and a STOP-file kill switch — not "trust the agent and hope."

• Install
  • Install prerequisites (platform notes)
• Quickstart
• How it works
• Key concepts
• Dashboards
• CLI reference
• MCP tools
• Integrations
• Multi-provider
• Unattended mode
• Storage & execution backends
• Configuration
• Architecture
• Development
• Contributing
• Known limits
• Roadmap
• License

npm install -g @jcast90/relay
rly welcome

…or without globally installing:

npx @jcast90/relay welcome

The npm package is published under the @jcast90 scope because both unscoped relay and rly were already taken on npm when Relay shipped. The binary exposed on $PATH is still rly.

git clone https://github.com/jcast90/relay
cd relay
./install.sh
rly welcome

Prereq checks (node >= 20, pnpm, git; plus cargo if you add --with-tui or --with-gui; plus Linux Tauri system libs if you add --with-gui on Linux), pnpm install && pnpm build, links the rly binary on your $PATH, scaffolds ~/.relay/config.env.template. Safe to re-run.

• --with-tui also builds the Rust dashboard.
• --with-gui also builds the Tauri desktop app. On Linux, the preflight will offer to apt-get install the required system libraries if they're missing.
• --skip-link skips the global link (useful in CI).

Download the .dmg (macOS) / .AppImage + .deb (Linux) / .msi (Windows) from the latest release.

Note: pre-release builds are unsigned. macOS will show a Gatekeeper warning on first open — right-click → Open the first time. Windows SmartScreen will ask for a click-through. Code signing + notarization is on the Roadmap.

pnpm install && pnpm build && pnpm link --global

macOS: Xcode Command Line Tools (xcode-select --install). Nothing else required.

Ubuntu / Debian (needed for --with-gui): install the Tauri system deps first —

sudo apt-get update
sudo apt-get install -y \
  libglib2.0-dev \
  libgtk-3-dev \
  libwebkit2gtk-4.1-dev \
  libsoup-3.0-dev \
  libjavascriptcoregtk-4.1-dev \
  libayatana-appindicator3-dev \
  librsvg2-dev

Windows: no extra system deps for the CLI. The GUI needs WebView2 (usually pre-installed on Windows 11).

The launcher (bin/rly.mjs) runs the current src/cli.ts via tsx by default — so a git pull reflects immediately, no rebuild required. RELAY_USE_DIST=1 switches to the pre-built dist/ for slightly faster startup.

rly welcome          # 6-step interactive tour (recommended)
# Or manually:
cd /path/to/your/repo
rly up               # register this repo
rly doctor           # sanity-check tokens + MCP wiring
rly claude           # launch Claude with Relay MCP attached

Then paste any of these as your first message:

• A plain sentence — "Add OAuth2 to /api/users"
• A GitHub issue URL — https://github.com/owner/repo/issues/42
• A Linear URL or key — linear.app/acme/issue/ABC-123 or just ABC-123

Relay's classifier picks it up, plans the work, and either executes or asks for approval depending on complexity.

   your request                        tracker URL detected?
        │                                      │
        ▼                                      ▼
  ┌───────────┐    GitHub / Linear    ┌─────────────────┐
  │classifier │ ◄───────────────────► │  resolve issue  │
  └─────┬─────┘                       └─────────────────┘
        │ complexity tier
        ▼
  ┌───────────┐
  │  planner  │ ──► design doc (if architectural)
  └─────┬─────┘
        │ phased plan
        ▼
  ┌────────────┐
  │ decomposer │ ──► tickets with dependency DAG
  └─────┬──────┘
        │
        ▼
  ┌────────────────┐     parallel, max-concurrency capped
  │   scheduler    │ ──► [T-1] [T-2] [T-3]
  └────────────────┘         │     │     │
                             ▼     ▼     ▼
                        implement → verify → retry
                             │
                             ▼
                         PR opens
                             │
                   ┌─────────┴─────────┐
                   │    PR watcher     │   GITHUB_TOKEN required
                   │    every 30 s     │
                   └─────────┬─────────┘
                             │
    CI fail / changes_requested ──► follow-up tickets
                             │
                             ▼
                          merged

Slack-style workspaces for one piece of work. Each channel carries:

• feed — messages, tool calls, PR state transitions
• tickets — unified ticket board (tickets.json) shared by chat and the orchestrator
• runs — linked orchestrator runs with full event history
• decisions — recorded choices with title / description / rationale / alternatives / linkedArtifacts, queryable per channel
• sessions — persisted chat transcripts (sessions/<id>.jsonl)

Channels sort by most-recent activity in the sidebar — the one you're working in stays at the top.

A channel can attach multiple repos. Exactly one is primary — that's where the GUI's main chat agent works and where its cwd defaults. Every other attached repo is associated — visible to the primary as alias + path + AGENTS.md summary (first ~40 lines), not full context.

Cross-repo work happens through the primary's tools, not by reading:

• Quick question → crosslink_send to another repo's live agent
• Long task → write a ticket with assignedAlias: "<repo-alias>"; the associated agent polls tickets.json and picks it up
• Primary is explicitly told not to grep or edit associated repo files directly

Live agents in different repos (each a rly claude session) discover each other via heartbeat files in ~/.relay/crosslink/sessions/ and exchange messages. MCP tools: crosslink_discover / crosslink_send / crosslink_poll.

Opt-in per associated repo at channel creation, or on demand when the primary hits a no_session error. The GUI opens a terminal tab running rly claude in the repo. Per platform: macOS uses Terminal.app via osascript (window/tab ids tracked for targeted close); Linux probes $TERMINAL then a chain (x-terminal-emulator, gnome-terminal, konsole, xterm, alacritty, kitty, wezterm); Windows prefers wt.exe, falls back to powershell.exe / cmd.exe. Tracked per channel in spawns.json; kill from the GUI closes the tab on macOS and SIGTERMs (or taskkill /T /F) the crosslink session on Linux/Windows. Self-heals against dead crosslink heartbeats.

If no supported terminal is detected, spawn surfaces an error and posts a system entry to the channel feed — run rly claude in the repo manually and crosslink will pick it up.

Parallelisable work units with:

• dependency DAG (dependsOn)
• retry budget (maxAgentAttempts, maxTestFixLoops)
• specialty tag (general | ui | business_logic | api_crud | devops | testing)
• optional assignedAlias for routing to a specific associated-repo agent
• verification commands (run against an allowlist, never shelled blindly)

Statuses: pending | blocked | ready | executing | verifying | retry | completed | failed.

First-class records with rationale + alternatives, written to channels/<id>/decisions/<id>.json. Each write is atomic (temp-rename) — readers (TUI, GUI, other CLI invocations) see a consistent file or the previous version, never a torn one.

Every agent has a display name (src/domain/agent-names.ts), so channel feeds show "Saturn reviewed the migration", not "agent-3".

All three read the same ~/.relay/ files — no synchronization, no split brain.

rly channels                    # list channels (sorted by latest activity)
rly channel <id>                # show channel details + feed
rly board <channelId>           # kanban view of the ticket board
rly decisions <channelId>       # decision history with rationale
rly running                     # active tasks across every workspace
rly status                      # workspace paths + recent runs
rly list-runs [--workspace <id>]
rly doctor                      # diagnostics

During HARNESS_LIVE=1 rly run with the Claude provider, tool-use events stream inline on stderr — each tool call appears as ⚙ [HH:MM:SS] [agent] Reading foo.ts. Pass --quiet (or set RELAY_QUIET=1) to silence the feed without affecting stdout.

rly tui                         # auto-builds on first run (~1 min)

Vertical channel sidebar · feed · task board · decisions · agents. Keyboard-driven, fast. While a Claude session is streaming, the chat pane shows a live tool-use stack (newest tool call, recent history, and a last update … timestamp) — matching the GUI's activity card.

rly gui                         # auto-builds the .app on first run (~2–3 min), then opens it
rly gui --dev                   # hot-reload Vite + Tauri window
rly gui --rebuild               # force rebuild

Catppuccin Mocha theme. Three tabs per channel:

• Chat — live streaming with thinking previews + tool-call rail + pulsing accent indicator
• Board — kanban with empty columns hidden, per-column scroll, click-any-ticket detail modal with dependency tree
• Decisions — chronological decision list with rationale

Right pane shows repo assignments (with PRIMARY badge), pinned refs, and — when present — a Spawned agents section with kill buttons.

The autonomous-loop tickets are mirrored to the public Relay project board, which carries the (role, repo) routing model the loop uses to dispatch work. Each issue has a Status, Effort, Target Repo, Admin, and Depends on field — Target Repo is the repo alias the work lands in and Admin names the repo-admin-<alias> that owns the ticket. Pick up work by filtering Status: Todo and making sure Depends on is empty or has all dependencies closed. Issues carrying the relay-seeded label were generated by Relay's seeder; others are human-authored. The board is resynced idempotently by scripts/push-tickets-to-github.ts — re-running it updates field values in place rather than creating duplicates.

Exposed to Claude and Codex via the Relay MCP server:

Harness (9): harness_status, harness_list_runs, harness_get_run_detail, harness_get_artifact, harness_approve_plan, harness_reject_plan, harness_dispatch, project_create, pr_review_start

Channels (6): channel_create, channel_get, channel_post, channel_record_decision, channel_task_board, harness_running_tasks

Crosslink (3): crosslink_discover, crosslink_send, crosslink_poll

Run rly inspect-mcp for the authoritative live list.

Built on Composio's @aoagents/ao-core leaf plugins. Paste a GitHub or Linear URL (or a bare Linear key like ABC-123) as your first message — the classifier fetches the full issue (title / body / labels / branch hint) before planning. The classifier output carries an optional suggestedBranch so generated PRs match the tracker's native branch name.

Tokens:

• GITHUB_TOKEN — GitHub issues + PR watcher + GitHub Projects v2 sync (needs project scope; read:org for org-owned projects)
• LINEAR_API_KEY (or COMPOSIO_API_KEY) — Linear issues

Relay channels project onto a GH Projects v2 board: channel → epic draft item, ticket → child draft item, with Type / Status / Priority custom fields kept in sync by a one-way Relay-authoritative sync worker. URL-paste a Projects v2 item into chat and the classifier resolves the project + epic + creates the ticket. Reuses GITHUB_TOKEN. Full reference: docs/trackers.md.

With GITHUB_TOKEN set, any orchestrator run starts a background poller that uses AO's enrichSessionsPRBatch every 30 s. State transitions — ci: passing → failing, review: pending → changes_requested, prState: merged — post status_update entries into the ticket's channel. CI failures and change-request reviews turn into real follow-up tickets via the scheduler's dynamic enqueue — no manual retriage.

rly pr-watch <url> manually tracks a PR outside the auto-detect loop. rly pr-status shows everything tracked.

src/channels/ao-notifier.ts exports HarnessChannelNotifier implements Notifier — so you can drop Relay in as a notifier plugin for Composio's ao orchestrator without a rewrite.

Relay's two CLI adapters (claude, codex) accept any endpoint that speaks their wire protocol, so any provider exposing an OpenAI-compatible or Anthropic-compatible HTTP API works today with zero code changes — just set the adapter's base-URL + key env vars. Known-good targets: MiniMax, OpenRouter, DeepSeek, Groq, Together, LiteLLM, vLLM.

# Route Codex through MiniMax.
export HARNESS_PROVIDER=codex
export OPENAI_BASE_URL=https://api.minimax.io/v1
export OPENAI_API_KEY=$MINIMAX_API_KEY
export HARNESS_AGENT_ATLAS_MODEL=MiniMax-M2
rly run "Add a health endpoint"

For smoke-testing + per-agent overrides + named profiles, see docs/providers.md.

rly providers profiles list              # named profiles
rly providers profiles add <id> ...      # save a profile for reuse
rly providers default <id|clear>         # pick a default profile
rly channel set-provider <ch> <pid>      # pin a channel to a profile

Profiles never store secrets — they reference env-var names (e.g. apiKeyEnvRef: "MINIMAX_API_KEY"), and rly providers profiles add rejects any --env KEY=VAL whose value looks like a raw key. The GUI has a Provider dropdown per channel (Settings drawer → About tab) and a Providers tab in the global Settings page for full CRUD.

Not yet shipped: native adapters for coding CLIs that aren't Claude- or Codex-compatible (Cursor, Gemini, Aider). See the Roadmap for status.

For multi-hour runs where you don't want to click "allow" on every tool call:

export RELAY_AUTO_APPROVE=1     # in ~/.relay/config.env or your shell
rly claude

Under the hood:

• Claude launches with --dangerously-skip-permissions
• Codex launches with --sandbox workspace-write + --ask-for-approval never
• Internal scheduler-dispatched agents inherit via RELAY_AUTO_APPROVE propagated in the child env

One-off: rly claude --yolo or rly claude --auto-approve.

Use this only when you trust the tasks you're dispatching. No per-tool review means rm -rf, git push --force, and unlinked network calls all go through without asking.

Relay stores everything in ~/.relay/ as JSON/JSONL files (atomic writes via tmp+rename). One backend, no DB required. All state — runs, tickets, decisions, crosslink messages, agent-names, workspace registry, session transcripts — goes through a single HarnessStore interface (src/storage/store.ts) so a future backend can slot in without rewriting handlers.

File backend is all that ships today. A Postgres backend (src/storage/postgres-store.ts) is stubbed in-tree for future multi-agent coordination — LISTEN/NOTIFY decision broadcasts and row-locked writes — but not wired yet; HARNESS_STORE=postgres currently warns and falls back to the file backend. See the Roadmap.

Verification commands run through an Executor abstraction (src/execution/executor.ts). Today the only shipping impl is LocalChildProcessExecutor — spawns locally. A pod-based executor was prototyped but has been removed until it's wired end-to-end; see the OSS-08 PR for context.

~/.relay/
  config.json                 # global config (project dirs, etc.)
                              #   `tracker` config block — see docs/trackers.md
  config.env.template         # copy to config.env and fill in
  workspace-registry.json     # all registered repos
  workspaces/<hash>/
    artifacts/
      runs-index.json
      <runId>/
        run.json              # full snapshot
        events.jsonl          # incremental event log
        ticket-ledger.json
        classification.json
        approval.json
  channels/<channelId>/
    channel.json              # name, members, repoAssignments, primaryWorkspaceId
                              #   .trackerLinks.githubProjects → projectId, projectNumber, projectUrl, epicItemId, epicDraftIssueId
                              #   (populated when the channel is provisioned against GH Projects v2)
    feed.jsonl                # append-only feed
    tickets.json              # unified ticket board (each ticket may carry .externalIds)
    runs.json                 # linked orchestrator runs
    tracked-prs.json          # PR-watcher mirror (read by TUI/GUI pr-status surfaces)
    decisions/<id>.json       # one file per decision (atomic writes)
    sessions/<sessionId>.jsonl
    spawns.json               # spawned-agent tracking (GUI, all platforms)
  crosslink/
    sessions/<sessionId>.json # live session heartbeats
    mailboxes/<sessionId>/    # pending crosslink messages
    hooks/                    # generated shell hooks for Claude/Codex
  agent-names.json            # display-name registry

src/
  cli.ts                      # entry point (bin/rly.mjs → tsx → here)
  index.ts                    # CLI dispatch (welcome, claude, codex, board, ...)
  cli/                        # CLI subcommands + launchers (tui, gui, rebuild, welcome)
  orchestrator/               # classifier, planner, decomposer, scheduler, approval
  agents/                     # Claude/Codex CLI adapters, registry, invocation
  channels/                   # ChannelStore, feed, decisions, ao-notifier
  integrations/               # AO plugins — tracker, scm, pr-poller, env-mutex
  execution/                  # executor abstraction, verification-runner
  storage/                    # HarnessStore interface + file / postgres backends
  domain/                     # shared types + zod schemas
  mcp/                        # MCP server + tool definitions
  crosslink/                  # session discovery, messaging, hook generation
  simulation/                 # scripted invoker for the scripted demo mode
  tui/                        # small TS shim that launches the ratatui binary

tui/                          # ratatui dashboard (Rust)
gui/                          # Tauri desktop app — React + Vite frontend, Rust backend
crates/harness-data/          # shared Rust crate consumed by tui + gui (reads ~/.relay/)

docs/getting-started.md       # canonical reference guide
bin/rly.mjs                   # CLI launcher (tsx by default, dist with RELAY_USE_DIST=1)
install.sh                    # one-command installer

• docs/ — human-facing deeper walkthroughs (getting started, storage injection).
• agent_docs/ — agent-targeted reference (architecture, data model, testing) for coding agents working in the repo.

pnpm install
pnpm test                     # 380+ vitest cases
pnpm typecheck                # tsc --noEmit
pnpm build                    # tsc → dist/
pnpm demo                     # scripted simulation, no real API calls
cd gui && pnpm build          # Vite bundle
cargo check --workspace       # all three Rust crates

Per-area quick loops:

• Vitest for TS. Tests live in test/ mirroring src/. Live-network tests sit in describe.skip blocks.
• Cargo for Rust. cargo test --workspace covers the TUI / GUI / shared crate.

HARNESS_LIVE=1 switches from the scripted ScriptedInvoker to real Claude/Codex spawns. Leave it off while developing orchestrator logic — the scripted mode is fast and deterministic.

Relay is pre-v1 and issues/PRs are genuinely welcome — including from folks who've never contributed before. If you hit a bug, file it with a reproduction. If you want to help:

• First-time contributors → good first issue — small, scoped, concrete. Comment "I'll take this" before you start so two people don't collide.
• Repeat contributors → help wanted — bigger efforts like distribution channels, cross-platform CI, and cost guardrails.
• For larger changes, open an issue first so we can align on shape before you burn time.

See AGENTS.md for the coding-agent conventions.

• Keep PR scope tight — prefer multiple small PRs over one big one.
• Run pnpm test && pnpm typecheck && pnpm build before pushing.
• Tests for new behavior. No snapshot tests for orchestrator output — assert on shape.
• Formatting: two-space indent, double quotes, semicolons, trailing commas where idiomatic. Run your editor's formatter on touched files.

A CLAUDE.md at the repo root (when present) tells any Claude agent working in this codebase — including rly claude itself — what conventions to follow.

• Spawn is cross-platform but lightly tested off macOS. macOS is daily-driven; Linux and Windows branches are compile-checked and unit-tested but real-device integration testing is still the gate before tagging a release.
• Cost guardrails not yet implemented. Token usage isn't tracked or capped. Use RELAY_AUTO_APPROVE=1 with care.

Honest snapshot — most of these haven't started. Order is rough priority, not commitment.

• Postgres backend for multi-agent coordination (exploratory, stubbed) — the file backend serializes writes per-host via tmp+rename atomics. A Postgres-backed HarnessStore would let multiple agents (same box or different) share state through LISTEN/NOTIFY cross-agent decision broadcasts and row-locked decision writes. Postgres here runs locally (brew install postgresql && createdb relay) or remote — this isn't a cloud-only feature. Source stub lives at src/storage/postgres-store.ts; not wired into the factory and the integration tests are skipped.
• Pod executor (Kubernetes) (exploratory) — verification runs off the dev box in per-ticket pods. Prototype was removed in OSS-08 until it's wired end-to-end again.
• S3 artifacts (exploratory) — moving ticket evidence off the local filesystem so it survives pod/host churn. Pairs with the pod executor.
• Distribution: Homebrew tap + winget manifest (planned) — for one-line brew install rly / winget install rly on top of the existing npm install -g @jcast90/relay path.
• Code signing + notarization (planned) — macOS .dmg (Developer ID + notarytool) and Windows .msi (Authenticode) so downloads don't need right-click-open / SmartScreen bypass. Requires paid certificates and a secret-management pass in the release workflow.
• Cost guardrails (in design) — token usage tracking per run, per ticket, per channel, with a soft cap that pauses scheduling when hit. Prerequisite to making RELAY_AUTO_APPROVE=1 safer for multi-hour runs.
• Integration test coverage off macOS (in progress) — Linux and Windows spawn paths are compile-checked but only smoke-tested; promoting them to the fast CI tier is the gate to tagging cross-platform releases.

MIT — see LICENSE.

• Composio for @aoagents/ao-core and the tracker / SCM plugin surface.
• Catppuccin Mocha palette.
• Tauri, Ratatui, vitest, tsx — the foundations everything rests on.