Apply technical requirements (R1, R2, R9, R10, R13)

- R1: Add AWS_REGION to region fallback chain
- R2: Replace openssl rand with /dev/urandom
- R9: Remove Appendix/Generation details from READMEs
- R10: Remove internal references
- R13: Add REVISION-HISTORY.md

Author: mwunderl

tuts/093-amazon-eventbridge-gs/README.md

@@ -56,15 +56,3 @@ Free tier eligible. Lambda and EventBridge invocations stay well within free tie
 - [Creating a rule that runs on a schedule](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-create-rule-schedule.html)
 - [Tutorial: Use EventBridge to relay events to a Lambda function](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-log-ec2-instance-state.html)
 - [Schedule expressions using rate or cron](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-scheduled-rule-pattern.html)
-
----
-
-## Appendix: Generation details
-
-| Field | Value |
-|-------|-------|
-| Generation date | 2026-04-14 |
-| Script lines | 130 |
-| Script test result | EXIT 0, 91s, 6 steps, clean teardown |
-| Issues encountered | None |
-| Iterations | v1 direct to publish |

tuts/093-amazon-eventbridge-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 093-amazon-eventbridge-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/093-amazon-eventbridge-gs/amazon-eventbridge-gs.sh

@@ -14,7 +14,7 @@ fi
 export AWS_DEFAULT_REGION="$REGION"
 echo "Region: $REGION"
 
-RANDOM_ID=$(openssl rand -hex 4)
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 RULE_NAME="eb-tut-rule-${RANDOM_ID}"
 FUNCTION_NAME="eb-tut-handler-${RANDOM_ID}"
 ROLE_NAME="eb-tut-role-${RANDOM_ID}"

tuts/110-amazon-sqs-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 110-amazon-sqs-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/110-amazon-sqs-gs/amazon-sqs-gs.sh

@@ -14,7 +14,7 @@ fi
 export AWS_DEFAULT_REGION="$REGION"
 echo "Region: $REGION"
 
-RANDOM_ID=$(openssl rand -hex 4)
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 QUEUE_NAME="tut-queue-${RANDOM_ID}"
 DLQ_NAME="tut-dlq-${RANDOM_ID}"
 FIFO_NAME="tut-fifo-${RANDOM_ID}.fifo"

tuts/159-sns-message-filtering/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 159-sns-message-filtering
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/159-sns-message-filtering/sns-filtering.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/sns-filter.log") 2>&1
-REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
-RANDOM_ID=$(openssl rand -hex 4); TOPIC="tut-filter-${RANDOM_ID}"; Q1="tut-orders-${RANDOM_ID}"; Q2="tut-alerts-${RANDOM_ID}"
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); TOPIC="tut-filter-${RANDOM_ID}"; Q1="tut-orders-${RANDOM_ID}"; Q2="tut-alerts-${RANDOM_ID}"
 handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
 cleanup() { echo ""; echo "Cleaning up..."; [ -n "$SUB1_ARN" ] && aws sns unsubscribe --subscription-arn "$SUB1_ARN" 2>/dev/null; [ -n "$SUB2_ARN" ] && aws sns unsubscribe --subscription-arn "$SUB2_ARN" 2>/dev/null; aws sns delete-topic --topic-arn "$TOPIC_ARN" 2>/dev/null && echo "  Deleted topic"; [ -n "$Q1_URL" ] && aws sqs delete-queue --queue-url "$Q1_URL" 2>/dev/null; [ -n "$Q2_URL" ] && aws sqs delete-queue --queue-url "$Q2_URL" 2>/dev/null; echo "  Deleted queues"; rm -rf "$WORK_DIR"; echo "Done."; }
 echo "Step 1: Creating topic and queues"

tuts/165-ses-email-identity/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 165-ses-email-identity
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/165-ses-email-identity/ses-identity.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/ses.log") 2>&1
-REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
-RANDOM_ID=$(openssl rand -hex 4); DOMAIN="tutorial-${RANDOM_ID}.example.com"
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1); DOMAIN="tutorial-${RANDOM_ID}.example.com"
 handle_error() { echo "ERROR on line $1"; trap - ERR; cleanup; exit 1; }; trap 'handle_error $LINENO' ERR
 cleanup() { echo ""; echo "Cleaning up..."; aws sesv2 delete-email-identity --email-identity "$DOMAIN" 2>/dev/null && echo "  Deleted identity"; rm -rf "$WORK_DIR"; echo "Done."; }
 echo "Step 1: Creating email identity (domain): $DOMAIN"

tuts/182-sqs-dead-letter-queues/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 182-sqs-dead-letter-queues
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+