PO.md for podcast episodes

PO.md

@@ -0,0 +1,66 @@
+NIP-PO
+======
+
+Podcast Events
+--------------
+
+`draft` `optional`
+
+This NIP defines `kind:30025` for podcast episodes and content. Podcast events represent audio content with associated metadata, transcripts, chapters, and show notes.
+
+## Event Kind
+
+This NIP defines `kind:30025` as a podcast event.
+
+The `.content` field may contain markdown-formatted show notes, or episode description.
+
+## Required Tags
+
+- `d` - Episode identifier (slug or unique identifier for this episode)
+- `title` - Episode title
+- `audio` - URL to the audio file
+- `duration` - Episode duration in format "HH:MM:SS" or "MM:SS"
+
+## Optional Tags
+
+- `summary` - Episode summary or description
+- `image` - URL to episode artwork/image
+- `episode` - Episode number
+- `transcript` - URL to transcript file (VTT, or SRT)
+- `chapters` - URL to chapters file (JSON format following [Podcast Namespace specification](https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/examples/chapters/example.json))
+- `rss` - URL to the podcast RSS feed
+- `ai_generated` - Boolean indicator if content is AI-generated ("true" or "false")
+- `published_at` - Unix timestamp of when episode was first published
+- `i` - External content identifier following [NIP-73](73.md) format for podcast episodes
+- `t` - Topic tags
+
+## Example Event
+
+```json
+{
+  "kind": 30025,
+  "created_at": 1757442746,
+  "content": "Sleep is essential for our physical and mental health. In this episode, we explore the latest research on how sleep affects memory, mood, and overall well-being.\n\nExperts share tips on improving sleep quality and discuss common myths about rest...",
+  "tags": [
+    ["d", "the-science-of-sleep"],
+    ["title", "The Science of Sleep: Why We Need Rest"],
+    ["audio", "https://my-podcast.com/the-science-of-sleep/audio.mp3"],
+    ["duration", "10:35"],
+    ["summary", "Discover the science behind why sleep is essential for our health. This episode explores how sleep impacts memory, mood, and well-being, and shares expert tips for improving sleep quality."],
+    ["image", "https://my-podcast.com/the-science-of-sleep/image.png"],
+    ["episode", 1],
+    ["transcript", "https://my-podcast.com/the-science-of-sleep/transcript.vtt"],
+    ["chapters", "https://my-podcast.com/the-science-of-sleep/chapters.json"],
+    ["rss", "https://my-podcast.com/podcast.rss"],
+    ["ai_generated", "false"],
+    ["published_at", "1757442746"],
+    ["i", "podcast:item:guid:https://my-podcast.com/the-science-of-sleep"],
+    ["t", "podcast"],
+    ["t", "sleep"],
+    ["t", "health"]
+  ],
+  "pubkey": ".....",
+  "id": "....",
+  "sig": "...."
+}
+```