Add Codex repository baseline

.codex/project.md

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+# Codex Project Notes
+
+## Project
+
+`Robocopy_Overhaul` is a Codex-ready repository baseline for a Robocopy overhaul project.
+
+Repository:
+
+```text
+Toxic/Robocopy_Overhaul
+```
+
+Remote:
+
+```text
+https://git.wilkensxl.de/Toxic/Robocopy_Overhaul.git
+```
+
+## Commands
+
+No stack-specific commands are defined yet.
+
+Use this section as the source of truth once the project has implementation code:
+
+```text
+lint: PENDING
+test: PENDING
+build: PENDING
+audit: PENDING
+readme: manual README
+```
+
+Do not invent commands that cannot run.
+
+## Stack
+
+```text
+PENDING
+```
+
+Package manager or build tool:
+
+```text
+PENDING
+```
+
+## Build Artifacts
+
+Release artifacts are not defined yet.
+
+Expected files:
+
+```text
+PENDING
+```
+
+## Security Rules
+
+- Do not commit secrets, tokens, `.env` files, certificates, or private keys.
+- Treat generated credentials as sensitive.
+- Prefer local generation and local processing for user data.
+- Keep dependency audit results visible in CI where possible after a stack is chosen.
+- Do not add external network calls unless the feature explicitly requires them.
+
+## Release Rules
+
+Before a release:
+
+1. run the release checklist,
+2. verify CI is green,
+3. verify download links,
+4. update README and changelog,
+5. create a tag,
+6. create the release.
+
+Do not create releases unless the user explicitly asks for a release.