feat: v9.0.0 — three new agent templates (Discovery, Stakeholder Comms, Launch)

This release adds three new agent templates to the library, bringing the total to four.

New templates:
- PM Discovery Agent: synthesises customer interviews from Notion or Google Drive,
  identifies cross-interview themes, scores assumption confidence, generates follow-up questions
- PM Stakeholder Comms Agent: detects audience type (executive/investor/stakeholder/board),
  pulls activity from Linear/Jira/Drive, drafts in audience-appropriate format
- PM Launch Agent: end-to-end launch coordination with channel-specific content,
  calendar, success metrics, and launch checklist

Each template follows the established pattern: README, AGENT.md, orchestrate.sh,
2 subagents, connectors with example configs, examples, smoke test.

Total file count: 37 new files across 3 templates.

Updated README to position library as 4-template collection.
Bumped marketplace.json from v8.0.0 to v9.0.0.

templates/pm-discovery-agent/tests/smoke-test.md

@@ -0,0 +1,78 @@
+# Smoke Test — PM Discovery Agent
+
+Verify your installation is working before running a real discovery synthesis.
+
+## Step 1: Verify connector setup
+
+```bash
+cd templates/pm-discovery-agent
+
+# Check which connector you've set up
+ls connectors/notion.json connectors/google-drive.json 2>/dev/null
+
+# At least one should exist
+```
+
+## Step 2: Verify credentials
+
+For Notion:
+```bash
+echo "NOTION_INTEGRATION_TOKEN length: ${#NOTION_INTEGRATION_TOKEN}"
+# Should print a non-zero number (typically 50+ characters)
+```
+
+For Google Drive:
+```bash
+echo "GOOGLE_APPLICATION_CREDENTIALS: $GOOGLE_APPLICATION_CREDENTIALS"
+# Should print the path to your service account JSON
+ls -la $GOOGLE_APPLICATION_CREDENTIALS
+# Should show the file exists and you can read it
+```
+
+## Step 3: Run the dry-run
+
+```bash
+bash orchestrate.sh \
+  --research-question "Smoke test of agent setup" \
+  --interview-source notion \
+  --dry-run
+```
+
+(Or `--interview-source google-drive` if that's what you set up.)
+
+**Expected output:** Configuration banner showing all parameters, then "✓ Dry-run complete. Configuration is valid."
+
+## Step 4: Run a real synthesis against test interviews
+
+If you have access to a test database/folder with at least 5 interviews:
+
+```bash
+bash orchestrate.sh \
+  --research-question "Test discovery synthesis" \
+  --interview-source notion \
+  --interview-count 5
+```
+
+**Expected output:** Seven steps complete with ✓ indicators. Output file created at `output/discovery-[date].md`.
+
+## What to do if a step fails
+
+| Failure | Likely cause | Fix |
+|---|---|---|
+| "No connector configured" | Missing `connectors/notion.json` or `connectors/google-drive.json` | Copy the `.example.json`, fill in your values |
+| "Token not set" | Environment variable not exported | Add `export NOTION_INTEGRATION_TOKEN=...` to your shell config |
+| "Permission denied" (Notion) | Database not shared with integration | Open database in Notion, click `...`, "Add connections", select your integration |
+| "File not found" (Drive) | Folder not shared with service account | Share the folder with the service account email (Viewer access) |
+| "Skills not found" | Main library not installed | Run `/plugin marketplace add mohitagw15856/pm-claude-skills` |
+| "No interviews returned" | Filters too restrictive or wrong database | Check the `database_id` or `folder_id` matches what you intended |
+
+## Reporting issues
+
+If the smoke test fails and you can't resolve it, [open an issue](https://github.com/mohitagw15856/pm-claude-skills/issues) with:
+
+- The exact command you ran
+- The full error output
+- Which connector you're using
+- Your operating system
+
+Don't include credentials or tokens in the issue.