docs: product-facing README; archive CST theory notes (0.9.34)

Rewrite the homepage for day-to-day use, move paper/eval drafts under
docs/archive, and add a docs index so theory no longer leads the project.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/e2e_fixture.sh

@@ -7,7 +7,7 @@
 #       [--model M] [--max-steps N] [--tools minimal|default] [--out DIR]
 #       [--record] [--baseline-only]
 #
-# --tools defaults to minimal (the four tools the paper experiments used).
+# --tools defaults to minimal (read_file / run_shell / write_file / apply_patch).
 #
 # Artifacts go to <out>/<fixture>__<protocol>__<model>__<stamp>/:
 #   result.json  agent.log  session.jsonl  metrics.jsonl  check.log  [sse/]

scripts/replay_starvation.sh

@@ -5,4 +5,4 @@ ROOT="$(cd "$(dirname "$0")/.." && pwd)"
 cd "$ROOT"
 make check
 echo
-echo "See docs/theory_tool_cst.md for the claim under test."
+echo "Historical note: docs/archive/theory_tool_cst.md (not product docs)."

scripts/run_matrix.sh

@@ -9,7 +9,7 @@
 #
 #   -m  provider:model pairs (model may be empty: "deepseek:")
 #   -r  also record raw SSE streams per run (for replay experiments)
-#   -t  tool profile (default minimal, as in the paper runs)
+#   -t  tool profile (default minimal)
 #
 # Each run is scripts/e2e_fixture.sh; results land in <out>/<run>/ and the
 # summary in <out>/results.csv and <out>/summary.md.