Record a866f8d505c94c698e28b0d8ba1d965f

We need to produce a JSON array of tool calls that will achieve the goal: service 'ledger-0' must reach at least the 'healthy' state. The current state: ledger-0 is down (not provisioned). billing-1 is down. release-image artifact does not exist. db-migration artifact does not exist. maintenance_window_open flag is off. secrets_synced flag is off.

We have tools:

- advance_2: deploy(service) moves from 'configured' to 'deployed'. Precondition: service must currently be 'configured'.

- advance_0: provision(service) moves from 'down' to 'provisioned'. Precondition: service must currently be 'down'.

- advance_3: health-check(service) moves from 'deployed' to 'healthy'. Precondition: service must currently be 'deployed'.

- advance_1: configure(service) moves from 'provisioned' to 'configured'. Precondition: service must currently be 'provisioned'.

We also have flags: maintenance_window_open (flag_0) and secrets_synced (flag_1). There may be tools to set flags? Not listed. Possibly we can set flags via some tool? Not given. The catalog only includes those four tools. No tool to set flags. But the goal does not require flags to be on; only that ledger-0 reaches healthy state. However preconditions may involve flags? Not mentioned. The preconditions only refer to service state. So we can ignore flags.

But we need to ensure that the release-image and db-migration artifacts exist? Not required for goal, but maybe needed for deployment? The tools only require service state, not artifacts. However maybe deployment requires artifacts? Not in preconditions. So we can just provision ledger-0, then configure, then deploy, then health-check.

But we need to respect the order of states: down -> provisioned -> configured -> deployed -> healthy. Actually the states progression: down -> provisioned (via provision). Then provisioned -> configured (via configure). Then configured -> deployed (via deploy). Then deployed -> healthy (via health-check). So we need to move ledger-0 through these states.

Currently ledger-0 is down. So we can call provision (advance_0) with service svc_0. That will move it to provisioned.

After that, we need to configure it: advance_1 with service svc_0 (must be provisioned). Then deploy: advance_2 with service svc_0 (must be configured). Then health-check: advance_3 with service svc_0 (must be deployed). That's 4 calls.

But we also have billing-1 down; maybe we need to provision it? Not required for goal. But maybe we need to provision it to get artifacts? Not needed.

But we also have flags off; maybe we need to turn them on? Not required for goal. However maybe some preconditions require flags? Not mentioned. So we can ignore.

But we must ensure that we use exact entity IDs: services: svc_0 (ledger-0), svc_1 (billing-1). So we will use svc_0 for ledger-0.

Thus sequence:

1. {"tool":"advance_0","args":{"service":"svc_0"}}
2. {"tool":"advance_1","args":{"service":"svc_0"}}
3. {"tool":"advance_2","args":{"service":"svc_0"}}
4. {"tool":"advance_3","args":{"service":"svc_0"}}

That's 4 calls, within 8.

Check preconditions:

- Initially ledger-0 is down. provision precondition: service must be down. Yes.

- After provision, ledger-0 becomes provisioned. configure precondition: service must be provisioned. Yes.

- After configure, ledger-0 becomes configured. deploy precondition: service must be configured. Yes.

- After deploy, ledger-0 becomes deployed. health-check precondition: service must be deployed. Yes.

Thus works.

We must output only JSON array of tool calls, each object with "tool" and "args". No extra text.

Thus output:

[
  {"tool":"advance_0","args":{"service":"svc_0"}},
  {"tool":"advance_1","args":{"service":"svc_0"}},
  {"tool":"advance_2","args":{"service":"svc_0"}},
  {"tool":"advance_3","args":{"service":"svc_0"}}
]

Make sure it's valid JSON array. No extra whitespace? It's okay.

Thus final answer.