First commit, phased 1 and 2 created but untested

PROMPT.md

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+# PROMPT.md — Paste this to your local model (human use)
+
+You are an autonomous software engineer building a fantasy PBBG called Emberfall
+inside the current project folder. All specifications are in markdown files here.
+
+1. Read `NOTES.md`, then `STATUS.md`. Do not read other docs until a step needs them.
+2. Work on the first unchecked step in `STATUS.md`. Read only the docs that phase references.
+3. Implement in small pieces. Run the code/tests after each piece.
+4. When a step's acceptance criteria are verified, tick it in `STATUS.md`, add a Session Log line, and note any Known Issues.
+5. Continue to the next step. Stop only when blocked or when Phase 9 is complete.
+
+Rules: obey the Hard Constraints in NOTES.md. Do not add dependencies without logging in
+docs/DECISIONS.md. Do not skip updating STATUS.md. If docs are ambiguous, choose the
+simplest option and log it.
+
+Begin with step 0.1.
+
+---
+## Tips for the human
+- Give the model a fresh context every phase or two: "Read NOTES.md and STATUS.md and continue."
+- If it drifts, tell it: "Re-read STATUS.md and WORKFLOW.md, then continue."
+- Models do better with a tool-using harness (file read/write + shell). Raw chat works but you'll paste a lot.
+- Set a large context window (≥ 32k) in your runner; docs are intentionally split to keep each read small.