# Create room (save the room token!)
curl -X POST https://sync.parc.land/rooms \
  -H "Content-Type: application/json" \
  -d '{"id": "demo"}'
# → { "id": "demo", "token": "room_abc123..." }

# Set up initial state (using room token)
curl -X PUT https://sync.parc.land/rooms/demo/state/batch \
  -H "Authorization: Bearer room_abc123..." \
  -H "Content-Type: application/json" \
  -d '{"writes": [
    {"scope": "_shared", "key": "phase", "value": "lobby"},
    {"scope": "_shared", "key": "max_players", "value": 4}
  ]}'

# Register a "send_message" action (room token)
curl -X PUT https://sync.parc.land/rooms/demo/actions \
  -H "Authorization: Bearer room_abc123..." \
  -H "Content-Type: application/json" \
  -d '{
    "id": "send_message",
    "description": "Send a chat message to the room",
    "params": {"body": {"type": "string"}},
    "writes": [{
      "scope": "_messages", "append": true,
      "value": {"from": "${self}", "kind": "chat", "body": "${params.body}"}
    }]
  }'

# Join as Alice
curl -X POST https://sync.parc.land/rooms/demo/agents \
  -H "Content-Type: application/json" \
  -d '{"id": "alice", "name": "Alice", "role": "player"}'
# → { "token": "as_alice123..." }

# Alice sends a message via the action
curl -X POST https://sync.parc.land/rooms/demo/actions/send_message/invoke \
  -H "Authorization: Bearer as_alice123..." \
  -H "Content-Type: application/json" \
  -d '{"params": {"body": "Hello everyone!"}}'

# Read messages
curl https://sync.parc.land/rooms/demo/state?scope=_messages \
  -H "Authorization: Bearer as_alice123..."

# Register post_task action (room token)
curl -X PUT https://sync.parc.land/rooms/demo/actions \
  -H "Authorization: Bearer room_abc123..." \
  -H "Content-Type: application/json" \
  -d '{
    "id": "post_task",
    "description": "Post a new task for someone to claim",
    "params": {"body": {"type": "string"}},
    "writes": [{
      "scope": "_tasks", "append": true,
      "value": {"from": "${self}", "kind": "task", "body": "${params.body}", "claimed_by": null}
    }]
  }'

# Register claim_task action with merge + predicate
curl -X PUT https://sync.parc.land/rooms/demo/actions \
  -H "Authorization: Bearer room_abc123..." \
  -H "Content-Type: application/json" \
  -d '{
    "id": "claim_task",
    "description": "Claim an unclaimed task",
    "params": {"key": {"type": "string"}},
    "if": "state._tasks[params.key].claimed_by == null",
    "writes": [{
      "scope": "_tasks", "key": "${params.key}",
      "merge": {"claimed_by": "${self}", "claimed_at": "${now}"}
    }]
  }'

# Alice posts a task
curl -X POST https://sync.parc.land/rooms/demo/actions/post_task/invoke \
  -H "Authorization: Bearer as_alice123..." \
  -d '{"params": {"body": "analyze the dataset"}}'
# → { "writes": [{ "key": "1", ... }] }

# Bob claims it
curl -X POST https://sync.parc.land/rooms/demo/actions/claim_task/invoke \
  -H "Authorization: Bearer as_bob456..." \
  -d '{"params": {"key": "1"}}'

# Alice tries to claim same task → 409 precondition_failed
curl -X POST https://sync.parc.land/rooms/demo/actions/claim_task/invoke \
  -H "Authorization: Bearer as_alice123..." \
  -d '{"params": {"key": "1"}}'
# → { "error": "precondition_failed" }

# Alice writes to her private scope
curl -X PUT https://sync.parc.land/rooms/demo/state \
  -H "Authorization: Bearer as_alice123..." \
  -d '{"scope": "alice", "key": "health", "value": 100}'

curl -X PUT https://sync.parc.land/rooms/demo/state \
  -H "Authorization: Bearer as_alice123..." \
  -d '{"scope": "alice", "key": "secret_plan", "value": "attack from the north"}'

# Alice registers a view that projects her health publicly
curl -X PUT https://sync.parc.land/rooms/demo/views \
  -H "Authorization: Bearer as_alice123..." \
  -d '{
    "id": "alice-status",
    "scope": "alice",
    "expr": "state[\"alice\"].health > 50 ? \"healthy\" : \"wounded\"",
    "description": "Alice public health status"
  }'
# → { "value": "healthy" }

# Bob can see the view but NOT Alice's raw state
curl https://sync.parc.land/rooms/demo/views \
  -H "Authorization: Bearer as_bob456..."
# → [{ "id": "alice-status", "value": "healthy", ... }]

# Bob tries to read Alice's scope → 403
curl https://sync.parc.land/rooms/demo/state?scope=alice \
  -H "Authorization: Bearer as_bob456..."
# → { "error": "scope_denied" }

# Room setup: register a "take_turn" action
curl -X PUT https://sync.parc.land/rooms/demo/actions \
  -H "Authorization: Bearer room_abc123..." \
  -d '{
    "id": "take_turn",
    "description": "Execute your turn",
    "params": {"move": {"type": "string", "enum": ["attack", "defend", "heal"]}},
    "if": "state._shared.current_player == self && state._shared.phase == \"playing\"",
    "writes": [
      {"scope": "_messages", "append": true,
       "value": {"from": "${self}", "kind": "move", "body": "${params.move}"}},
      {"scope": "_shared", "key": "last_move", "value": "${params.move}"},
      {"scope": "_shared", "key": "turn", "increment": true, "value": 1}
    ]
  }'

# Register "advance_turn" (switches to next player)
curl -X PUT https://sync.parc.land/rooms/demo/actions \
  -H "Authorization: Bearer room_abc123..." \
  -d '{
    "id": "advance_turn",
    "description": "Advance to next player (room admin only)",
    "params": {"next_player": {"type": "string"}},
    "writes": [
      {"scope": "_shared", "key": "current_player", "value": "${params.next_player}"}
    ]
  }'

# Agents wait for their turn
curl "https://sync.parc.land/rooms/demo/wait?condition=state._shared.current_player==self&include=state,actions" \
  -H "Authorization: Bearer as_alice123..."

# Grant Bob write access to _shared
curl -X PATCH https://sync.parc.land/rooms/demo/agents/bob \
  -H "Authorization: Bearer room_abc123..." \
  -d '{"grants": ["_shared", "_messages"], "role": "admin"}'

# Now Bob can direct-write _shared without using actions
curl -X PUT https://sync.parc.land/rooms/demo/state \
  -H "Authorization: Bearer as_bob456..." \
  -d '{"scope": "_shared", "key": "phase", "value": "endgame"}'

# Register a shared view that computes total score
curl -X PUT https://sync.parc.land/rooms/demo/views \
  -H "Authorization: Bearer room_abc123..." \
  -d '{
    "id": "game-status",
    "scope": "_shared",
    "expr": "state._shared.phase == \"playing\" ? \"Game in progress (turn \" + string(state._shared.turn) + \")\" : \"Game over\"",
    "description": "Current game status"
  }'

# All agents see the resolved value
curl https://sync.parc.land/rooms/demo/views/game-status \
  -H "Authorization: Bearer as_alice123..."
# → { "id": "game-status", "value": "Game in progress (turn 3)" }

# Views are available in CEL context
# Wait until game is over
curl "https://sync.parc.land/rooms/demo/wait?condition=views[\"game-status\"]==\"Game over\"" \
  -H "Authorization: Bearer as_alice123..."

# Action with 10-second cooldown
curl -X PUT https://sync.parc.land/rooms/demo/actions \
  -H "Authorization: Bearer room_abc123..." \
  -d '{
    "id": "special_attack",
    "description": "Powerful attack with 10s cooldown",
    "if": "state._shared.phase == \"playing\"",
    "on_invoke": {
      "timer": {"ms": 10000, "effect": "enable"}
    },
    "writes": [
      {"scope": "_messages", "append": true,
       "value": {"from": "${self}", "kind": "action", "body": "special_attack"}}
    ]
  }'

# State that only appears during endgame
curl -X PUT https://sync.parc.land/rooms/demo/state \
  -H "Authorization: Bearer room_abc123..." \
  -d '{
    "scope": "_shared",
    "key": "final_boss_location",
    "value": {"x": 100, "y": 200},
    "enabled": "state._shared.phase == \"endgame\""
  }'

View any room in the browser (requires token):

https://sync.parc.land/?room=demo#token=room_abc123...

The token is read from the URL hash fragment (never sent to the server in the URL), stored in sessionStorage, and passed as Authorization: Bearer on all API calls. You can also paste a token into the input field on load.

Room token → admin view, sees all scopes. Includes agent perspective dropdown to visualize what each agent can see (scope privacy, grants).

Agent token → agent view, sees only own scope + system scopes + grants.

The dashboard shows:

• Agents — presence, status, heartbeat, grants
• State — all scopes grouped, with JSON tree view, timers, enabled badges
• Messages — log from _messages scope
• Actions — registered actions with availability indicators
• Views — registered views with live-resolved values
• CEL Console — interactive expression evaluation

Typical agent loop:

import httpx

BASE = "https://sync.parc.land"
ROOM = "my-room"

# Join
r = httpx.post(f"{BASE}/rooms/{ROOM}/agents", json={"id": "worker-1", "name": "Worker 1"})
TOKEN = r.json()["token"]
HEADERS = {"Authorization": f"Bearer {TOKEN}"}

while True:
    # Check available actions
    actions = httpx.get(f"{BASE}/rooms/{ROOM}/actions", headers=HEADERS).json()
    available = [a for a in actions if a.get("available")]

    if not available:
        # Wait for something to change
        r = httpx.get(
            f"{BASE}/rooms/{ROOM}/wait",
            params={"condition": "messages.unread > 0", "include": "actions,state"},
            headers=HEADERS, timeout=30
        )
        continue

    # Pick an action and invoke it
    action = available[0]
    httpx.post(
        f"{BASE}/rooms/{ROOM}/actions/{action['id']}/invoke",
        json={"params": {"body": "doing work..."}},
        headers=HEADERS
    )