feat(mistral-vibe): add Mistral Vibe devcontainer feature

.awf.yaml

@@ -0,0 +1,10 @@
+# AWF Configuration
+# https://github.com/awf-project/cli
+
+version: "1"
+
+# Default log level: debug, info, warn, error
+log_level: info
+
+# Output format: text, json, table, quiet
+output_format: text

.awf/config.yaml

@@ -0,0 +1,14 @@
+# AWF Project Configuration
+# https://github.com/awf-project/cli
+#
+# This file provides default values for workflow inputs.
+# CLI --input flags override these values.
+#
+# IMPORTANT: Do not store secrets here - use environment variables instead.
+
+# Workflow inputs - pre-populate values for awf run
+# Uncomment and modify the examples below:
+inputs:
+  # project: my-project
+  # environment: staging
+  # debug: false

.awf/scripts/create-feature/validate-name.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+set -e
+
+# validate-name.sh — Derive or validate a devcontainer feature name
+#
+# Inputs (AWF interpolation):
+#   {{.inputs.description}} - Feature description (required)
+#   {{.inputs.name}}        - Feature name override (optional, kebab-case)
+#
+# Output (stdout): plain feature ID (kebab-case, e.g. "zellij")
+
+DESCRIPTION="{{.inputs.description}}"
+NAME="{{.inputs.name}}"
+
+if [ -z "$DESCRIPTION" ]; then
+    echo "ERROR: DESCRIPTION is required"
+    exit 1
+fi
+
+# Derive name from description if not provided
+if [ -z "$NAME" ]; then
+    # Extract the tool/project name: take the word after "Installs" or first capitalized word
+    NAME=$(echo "$DESCRIPTION" \
+        | sed -E 's/^[Ii]nstalls?\s+//' \
+        | sed -E 's/^(the\s+|a\s+|an\s+)//i' \
+        | awk '{print $1}' \
+        | tr '[:upper:]' '[:lower:]' \
+        | sed -E 's/[^a-z0-9-]//g')
+fi
+
+# Validate: must be non-empty kebab-case
+if [ -z "$NAME" ]; then
+    echo "ERROR: could not derive feature name from description: ${DESCRIPTION}"
+    exit 1
+fi
+
+if ! echo "$NAME" | grep -qE '^[a-z][a-z0-9-]*[a-z0-9]$'; then
+    # Single char names are also valid
+    if ! echo "$NAME" | grep -qE '^[a-z]$'; then
+        echo "ERROR: invalid feature name '${NAME}' — must be kebab-case (lowercase, hyphens, start with letter)"
+        exit 1
+    fi
+fi
+
+# Output just the ID (no JSON — output_format: json is only supported on agent steps)
+printf '%s' "$NAME"