refactor: establish standalone application boundary

tools/README.md

@@ -1,43 +1,24 @@
-# Candidate tools
+# Maintenance tools
 
-Run these commands from `webapp/app/`. The tools are separated by responsibility so a
-maintenance command cannot be mistaken for a historical migration rewrite.
+Run these commands from the application root. This directory contains only active startup,
+registry, and verification tools.
 
 ## Normal maintenance
 
-- `python tools/verify_baseline.py`: candidate unit tests, registry checks, every frontend
+- `powershell -ExecutionPolicy Bypass -File tools/start_local.ps1 [-Port 8797]`: start the
+  local application in a hidden process and keep logs, the PID, and Python cache under
+  `runtime/` instead of the source root.
+- `python tools/verify_baseline.py`: all unit tests, registry checks, every frontend
   JavaScript syntax check, Git whitespace check, and read-only SQLite integrity check.
 - `python tools/verify_baseline.py --e2e`: the same checks plus Playwright. The verifier owns
   the local static-server lifecycle so the command exits cleanly on Windows.
 - `python tools/build_api_registry.py [--check]`: generate or verify
-  `config/api.config.json` from `backend/application.py`.
+  `config/api.config.json` from `backend/http/dispatch.py` and the registered
+  `backend/features/*/routes.py` owners.
 - `python tools/build_architecture_inventory.py [--check]`: generate or verify
-  `config/architecture-inventory.json` from the candidate source tree.
+  `config/architecture-inventory.json` from the current source tree.
 
-Inside the canonical `webapp/app/` checkout, `verify_baseline.py` runs the full preservation
-suite against the retained original baseline and enforces `git diff --check`. In a standalone
-`app/` export where that baseline and Git checkout do not exist, the same command runs all
-candidate-owned tests, skips only `test_preservation_*` comparison modules, and reports the Git
-check as skipped. Product, registry, JavaScript, database, and optional Playwright checks remain
-active in both modes.
-
-## Acceptance and differential checks
-
-- `run_preservation_runtime.py`: start an isolated original or candidate runtime with an
-  explicitly selected data directory and port.
-- `compare_preservation_apis.py`: compare authenticated responses from two isolated runtimes.
-- `compare_preservation_databases.py`: compare schema and selected table contents from two
-  SQLite copies.
-
-These tools require explicit paths and do not select the production database automatically.
-
-## Migration-only tools
-
-- `build_preservation_manifest.py`: builds an exact-copy manifest for a specified source and
-  target. `--output` is mandatory so committed historical evidence is not overwritten.
-- `move_class_methods.py`: mechanically moves named class methods between explicit files.
-- `split_frontend_runtime.py`: reproduces the one-time Slice 10 split. It refuses to write
-  unless `--apply` is supplied and is not a normal maintenance command.
-
-The migration-only tools are retained for audit and reproducibility. They are not part of
-application startup, normal testing, or future feature development.
+`verify_baseline.py` does not inspect a parent checkout or skip tests according to files outside
+this application. Historical comparison scripts were retired after final standalone acceptance;
+their results remain under `docs/migration/evidence/` and their source remains recoverable from
+Git history.