Azure servicebus operations

Azure Service Bus Operations (Single-File C# Scripts)

Overview

Six dotnet single-file scripts bundled at scripts/. They handle operational Service Bus tasks the az CLI can't do (or makes painful). All authenticate via DefaultAzureCredential — az login covers the common case.

When to use which

Symptom / task	Script	Destructive?
"List every topic / queue / subscription in this namespace"	sb-discovery	No
"Quick snapshot of active + DLQ counts on one or more entities"	sb-metrics	No
"What's in this subscription / queue / DLQ?"	sb-peek	No
"I need each message dumped to disk as JSON to inspect"	sb-peek --write-messages=true	No
"Permanently discard everything in this sub or DLQ"	sb-drain	YES (--confirm=true)
"az CLI rejects --forward-to '' with LinkedInvalidPropertyId"	sb-clear-fwd	Yes (config)
"Receive+complete N messages to smoke-test a consumer"	sb-consume	YES

Prerequisites

• dotnet 10+ SDK (single-file script support; dotnet run script.cs)
• az login with reader role (peek / consume / drain / metrics / discovery) or contributor (clear-fwd) on the SB namespace
• Service Bus namespace can be short name (sbns-foo-prod) or FQDN

Convenience: path variable

# Set once per session — works whether installed via plugin or as a user skill
$sb = if ($env:CLAUDE_PLUGIN_ROOT) {
  "$env:CLAUDE_PLUGIN_ROOT\skills\azure-servicebus-operations\scripts"
} else {
  "$HOME\.claude\skills\azure-servicebus-operations\scripts"
}

sb-discovery

Enumerate Service Bus entities. Default hierarchical text view; --json for machine-readable; --out=FILE writes the JSON for later reference. Optional positional entity args narrow scope (auto-detected as topic, queue, or topic/sub).

# Shotgun the whole namespace, save snapshot for later questions
dotnet run $sb\sb-discovery.cs sbns-delta-alpha-prod --json --out=topology.json

# Narrow to one topic + its subs, with counts (fast because scope is small)
dotnet run $sb\sb-discovery.cs sbns-delta-alpha-prod dell-b2b-messages --with-counts

# Mix topic + queue in one call
dotnet run $sb\sb-discovery.cs sbns-delta-alpha-prod dell-b2b-messages dell-b2b_admin-message_default

--with-counts adds active+dlq numbers per entity (slower; pairs well with narrowed args).

sb-metrics

Snapshot counts + FwdTo for one or more entities in a single call. Default ASCII table; --json for newline-delimited JSON per entity. Entity is either queueName or topicName/subscription.

dotnet run $sb\sb-metrics.cs sbns-delta-alpha-prod `
  dell-b2b_admin-message_default `
  dell-b2b-messages/admin-message_ConnectorRequestNotification `
  dell-b2b-messages/admin-message_ConnectorResponseNotification `
  dell-b2b-messages/admin-message_SendAlertCommand

sb-peek

Non-destructive peek. Pass "" for the subscription arg to peek a queue directly. --subqueue=deadletter targets a DLQ sub-queue. --write-messages=true dumps each message to disk as JSON.

# Capture all DLQ entries on a queue to disk for forensics
dotnet run $sb\sb-peek.cs sbns-delta-alpha-prod dell-b2b_admin-message_default "" 1100 --subqueue=deadletter --write-messages=true

sb-drain

Destructive (ReceiveAndDelete). Refuses without --confirm=true. --max=N caps drained count (default 1000). Always pair with sb-peek --write-messages=true first if forensics matter — drained messages are unrecoverable.

dotnet run $sb\sb-drain.cs sbns-delta-alpha-prod dell-b2b-messages admin-message_SendAlertCommand --confirm=true --max=200

sb-clear-fwd

The az CLI rejects --forward-to "" with LinkedInvalidPropertyId. This script clears ForwardTo via ServiceBusAdministrationClient.UpdateSubscriptionAsync (which accepts null).

dotnet run $sb\sb-clear-fwd.cs sbns-delta-alpha-prod dell-b2b-messages orders-message_RealtimeMessageReceivedNotification

sb-consume

Destructive PeekLock + CompleteMessageAsync. Use for consumer-pipeline smoke tests where each message is acked individually (rather than batch-deleted).

dotnet run $sb\sb-consume.cs sbns-delta-alpha-prod dell-b2b-messages orders-message_SomeRoute 50

Memory integration

After running sb-discovery --out=FILE, save a Claude reference-memory entry pointing at the file so future questions can be answered against the snapshot without re-querying:

- [SB topology snapshot — sbns-delta-alpha-prod 2026-05-17](reference_sb_topology_alpha_prod_20260517.md) — pointer to JSON; refresh with sb-discovery before relying on it.

Common mistakes

• Forgetting --confirm=true on sb-drain → script refuses (intentional safety).
• Passing --forward-to "" to az CLI → LinkedInvalidPropertyId. Use sb-clear-fwd.
• Peeking a queue but supplying a sub name → pass "" for the subscription arg to enter queue mode.
• Running sb-drain against an actively-consumed sub → drains messages out from under the live consumer.
• Forgetting DLQ is a sub-queue → use sb-peek --subqueue=deadletter, not the main view.
• Running sb-discovery --with-counts against a huge namespace without narrowing → one round-trip per entity, slow. Narrow first.

Real-world example

SendAlertCommand cleanup pre-relaunch:

1. sb-metrics over the constellation → confirmed 87 parked on the sub, 1,049 on the pool queue DLQ.
2. sb-peek --write-messages=true 200 → captured 87 alerts to disk for forensics; sorted disk files by filename to find the most-recent.
3. sb-drain --confirm=true --max=200 → destructively cleared the sub.
4. sb-metrics again → confirmed active=0, dlq=0 before re-enabling the consumer in the next deploy.

Cross-references

• CSAT.IT.Messaging/docs/2-a-service-bus-dead-letter.md — DLQ mechanism + triage.
• CSAT.IT.Messaging/docs/6-distribute-routing.md — topology + DisabledRoutes behaviour.