raw: fetch behind a login - raw login stores the user's session as a secret outside the tree, fetch.routes sends a host through it or to an external fetcher, a handler's render goes through the optional browser component (preflight --with browser) (#169); 10.0.0-beta.8

Files changed:
- CHANGES.md
- INSTALL.md
- VERSION
- docs/how-to/README.md
- docs/how-to/fetch-pages-behind-a-login.md
- docs/how-to/ingest-a-source.md
- docs/reference/commands/README.md
- docs/reference/commands/instance-health.md
- docs/reference/commands/raw-material-and-uploads.md
- docs/reference/configuration.md
- docs/reference/exit-codes.md
- instructions/preflight.md
- instructions/wiki-ingest/SKILL.md
- raw/CONTRACT.md
- sites/CONTRACT.md
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/browser.py
- tools/chemenu/cli_contract.py
- tools/chemenu/commands/doctor.py
- tools/chemenu/commands/raw/__init__.py
- tools/chemenu/commands/raw/fetch.py
- tools/chemenu/commands/raw/login.py
- tools/chemenu/config_shapes.py
- tools/chemenu/fetch_routes.py
- tools/chemenu/reference_doc.py
- tools/chemenu/settings.py
- tools/chemenu/sites/__init__.py
- tools/chemenu/sites/data.py
- tools/chemenu/sites/site.schema.json
- tools/chemenu/tests/test_cli.py
- tools/chemenu/tests/test_config_shapes.py
- tools/chemenu/tests/test_doctor.py
- tools/chemenu/tests/test_preflight.py
- tools/chemenu/tests/test_preflight_pwsh.py
- tools/chemenu/tests/test_raw_fetch_routes.py
- tools/chemenu/tests/test_raw_login.py
- tools/chemenu/tests/test_site_files.py
- tools/chemenu/web_capture.py
- tools/chemenu/web_session.py
- tools/preflight.ps1
- tools/preflight.sh
- tools/requirements-browser.txt

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SnAJ7Z3CpVD3PRbN73QtU2

docs/reference/commands/README.md

@@ -79,7 +79,8 @@ Full records: [provenance.md](provenance.md)
 
 Full records: [raw-material-and-uploads.md](raw-material-and-uploads.md)
 
-- [`raw fetch`](raw-material-and-uploads.md#raw-fetch) - Capture a web page the user names into `incoming/`: the HTML as received plus a derived text, for `raw accept` to promote. Pages of a known website are fetched in the website's standard form and cleaned of its page furniture.
+- [`raw fetch`](raw-material-and-uploads.md#raw-fetch) - Capture a web page the user names into `incoming/`: the HTML as received plus a derived text, for `raw accept` to promote. Pages of a known website are fetched in the website's standard form and cleaned of its page furniture; a host the instance routes so is fetched with the user's own session or through an external fetcher.
+- [`raw login`](raw-material-and-uploads.md#raw-login) - Let the user sign in to a website once, in a visible browser window, and store the session it leaves as a secret outside the working tree, for `raw fetch` to fetch that website's pages with. Only the user runs it.
 - [`raw derive`](raw-material-and-uploads.md#raw-derive) - Derive reading text from a PDF, e-mail, Office file or web page in `incoming/`, or unpack a ZIP, and leave the original beside it, for `raw accept` to promote.
 - [`raw capture`](raw-material-and-uploads.md#raw-capture) - Capture documentation from a git repository into `incoming/<bundle>/`, with a manifest naming the repository, ref rule and commit, for `raw accept` to promote.
 - [`raw status`](raw-material-and-uploads.md#raw-status) - Report which captured bundles under `raw/` have fallen behind their repository, with each changed file as `A`/`M`/`D`.