chore: add collab/ structure; move questions; add AGENTS.md; addendum in SeedPrompt.md

SeedPrompt.md

@@ -33,4 +33,15 @@ This should be very collaborative. Ask questions (in a markdown file), once they
 I want to be able to test the code early/often and be able to provide feedback. I want to be able to edit markdown files inline to provide context/ask questions etc as we go. The chat interface itself should be kept very clean as it's running in the bottom of my vscode instance and I want to use vscode markdown facilities to rapidly read/edit the markdown files. So our primary way of interacting
 will be via those files.
 
-Commit/push everything in the repo now before we get started on the project.
+Commit/push everything in the repo now before we get started on the project.
+
+---
+
+## Addendum (Housekeeping) — 2025-09-17
+
+- Create and use a `collab/` directory for coordination artifacts.
+- Use consistent filenames: `<step-or-subject>-<type>.md` where `<type>` is one of `questions`, `proposal`, `plan`.
+- Move any existing questions into `collab/` following the naming scheme (e.g., `00-bootstrap-questions.md`).
+- Create and maintain an `AGENTS.md` at the repo root with working agreements and conventions.
+- Continue keeping `devlog/DEVLOG_LLM.md` and `devlog/DEVLOG_HUMAN.md` updated.
+- After applying this structure, commit and push the changes.