feat(basecamp-project): add launch workflow skill

skills/basecamp-project/references/execution-recovery.md

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+# Execution Recovery Reference
+
+Basecamp changes are not transactional. Do not describe recovery as rollback; use resume, repair, archive, or supersede language instead.
+
+## Cautious Batch Execution
+
+Execute changes in cautious batches so each step can be inspected before dependent objects are created. Capture created object identifiers and links as work proceeds.
+
+## Batch Order
+
+1. Project shell
+2. Structure inspection
+3. People/access
+4. Docs/project brief
+5. To-do lists
+6. To-dos
+7. Schedule
+8. Check-ins
+9. Kickoff/notification
+
+## Creation Log Format
+
+Record each successful change immediately after creation or update.
+
+```markdown
+# Creation Log
+
+## Project
+- Project: Name, ID, URL
+
+## Created or updated objects
+- Type: Message Board post | To-do list | To-do | Document | Schedule entry | Check-in
+  Title: Object title
+  ID: Basecamp object ID
+  URL: Object URL
+  Action: Created | Updated | Reused
+  Notes: Relevant context
+
+## Notifications
+- Audience: People or group notified
+  Method: Basecamp notification type
+  Reason: Why notification was sent
+```
+
+## Failure Report Format
+
+When a batch fails, stop dependent work and report enough detail to resume safely.
+
+```markdown
+# Failure Report
+
+## Failed batch
+Batch name and step number
+
+## Operation attempted
+Command or Basecamp action
+
+## Error observed
+Error message, status code, or unexpected response
+
+## Completed before failure
+Links and IDs from the creation log
+
+## Not yet attempted
+Remaining planned batches
+
+## Recommended next action
+Resume point or repair action
+```
+
+## Resume and Repair Workflow
+
+1. Read the creation log and failure report.
+2. Inspect the Basecamp project directly before making more changes.
+3. Confirm which objects already exist and whether they are complete.
+4. Reuse complete objects and repair incomplete objects where possible.
+5. Supersede or archive mistaken objects when they should not remain active.
+6. Resume from the first incomplete batch in the batch order.
+7. Update the creation log with every resumed or repaired action.
+8. Send kickoff or notifications only after the structure is inspected and stable.