Harden Section 0 contributor setup

README.md

@@ -47,6 +47,7 @@ TARGET_DIR=~/work/rta-handbook \
 ## Daily Flow
 
 ```sh
+section0-docs doctor
 section0-docs pull
 
 # Edit Markdown files in your normal editor.
@@ -60,6 +61,27 @@ After a push, ask the projection operator to pull and project. For now that is
 manual. The current operator command lives in
 `docs/projection-operations.md`.
 
+## Contributor Setup
+
+Anonymous clone/read works on the lab mesh. Pushing requires a Gitea account or
+token with write access to `section0/rta-handbook`.
+
+Run this once per checkout:
+
+```sh
+section0-docs configure
+```
+
+Then prove write access without changing `main`:
+
+```sh
+section0-docs push-test
+```
+
+`push-test` pushes the current commit to a temporary scratch branch and deletes
+that branch immediately. If Git prompts for a password, use a Gitea access token
+rather than your normal account password.
+
 ## Source Models
 
 This repo is the Git-backed model: shared docs are canonical in Gitea.