feat: add OpenProse plugin skills

extensions/open-prose/skills/prose/examples/27-string-interpolation.prose

@@ -0,0 +1,105 @@
+# String Interpolation Example
+# Demonstrates dynamic prompt construction with {variable} syntax
+
+# Basic interpolation
+let user_name = session "Get the user's name"
+let topic = session "Ask what topic they want to learn about"
+
+session "Create a personalized greeting for {user_name} about {topic}"
+
+# Multiple interpolations in one prompt
+let company = session "Get the company name"
+let industry = session "Identify the company's industry"
+let size = session "Determine company size (startup/mid/enterprise)"
+
+session "Write a customized proposal for {company}, a {size} company in {industry}"
+
+# Interpolation with context
+let research = session "Research the topic thoroughly"
+
+session "Based on the research, explain {topic} to {user_name}"
+  context: research
+
+# Multi-line strings with interpolation
+let project = session "Get the project name"
+let deadline = session "Get the project deadline"
+let team_size = session "Get the team size"
+
+session """
+Create a project plan for {project}.
+
+Key constraints:
+- Deadline: {deadline}
+- Team size: {team_size}
+
+Include milestones and resource allocation.
+"""
+
+# Interpolation in loops
+let languages = ["Python", "JavaScript", "Go"]
+
+for lang in languages:
+  session "Write a hello world program in {lang}"
+  session "Explain the syntax of {lang}"
+
+# Interpolation in parallel blocks
+let regions = ["North America", "Europe", "Asia Pacific"]
+
+parallel for region in regions:
+  session "Analyze market conditions in {region}"
+  session "Identify top competitors in {region}"
+
+# Interpolation with computed values
+let base_topic = session "Get the main topic"
+let analysis = session "Analyze {base_topic} from multiple angles"
+
+let subtopics = ["history", "current state", "future trends"]
+for subtopic in subtopics:
+  session "Explore the {subtopic} of {base_topic}"
+    context: analysis
+
+# Building dynamic workflows
+let workflow_type = session "What type of document should we create?"
+let audience = session "Who is the target audience?"
+let length = session "How long should the document be?"
+
+session """
+Create a {workflow_type} for {audience}.
+
+Requirements:
+- Length: approximately {length}
+- Tone: appropriate for {audience}
+- Focus: practical and actionable
+
+Please structure with clear sections.
+"""
+
+# Interpolation in error messages
+let operation = session "Get the operation name"
+let target = session "Get the target resource"
+
+try:
+  session "Perform {operation} on {target}"
+catch:
+  session "Failed to {operation} on {target} - attempting recovery"
+  throw "Operation {operation} failed for {target}"
+
+# Combining interpolation with choice blocks
+let task_type = session "Identify the type of task"
+let priority = session "Determine task priority"
+
+choice **the best approach for a {priority} priority {task_type}**:
+  option "Immediate action":
+    session "Execute {task_type} immediately with {priority} priority handling"
+  option "Scheduled action":
+    session "Schedule {task_type} based on {priority} priority queue"
+  option "Delegate":
+    session "Assign {task_type} to appropriate team member"
+
+# Interpolation with agent definitions
+agent custom_agent:
+  model: sonnet
+  prompt: "You specialize in helping with {topic}"
+
+session: custom_agent
+  prompt: "Provide expert guidance on {topic} for {user_name}"