sites: raw fetch gets site handlers - standard URL form, per-website cleanup and CHECK hints as a code registry, learn.microsoft.com first, plus a sites settings section (#200); 10.0.0-beta.3

Files changed:
- tools/chemenu/sites/ (registry, learn-microsoft handlers), web_capture.py, commands/raw/fetch.py, config_shapes.py
- tests, fixture, raw/CONTRACT.md, tools/README.md, docs, CHANGES.md, VERSION

Files changed:
- CHANGES.md
- VERSION
- docs/how-to/ingest-a-source.md
- docs/reference/commands/README.md
- docs/reference/commands/raw-material-and-uploads.md
- docs/reference/configuration.md
- raw/CONTRACT.md
- tools/CONTRACT.md
- tools/README.md
- tools/chemenu/commands/raw/fetch.py
- tools/chemenu/config_shapes.py
- tools/chemenu/reference_doc.py
- tools/chemenu/sites/__init__.py
- tools/chemenu/sites/learn_microsoft.py
- tools/chemenu/tests/fixtures/learn_microsoft/oslicense-module.html
- tools/chemenu/tests/test_config_shapes.py
- tools/chemenu/tests/test_sites.py
- tools/chemenu/web_capture.py

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

docs/reference/configuration.md

@@ -28,6 +28,7 @@ something you run.
   - [CalDAV](#caldav)
   - [Profiles](#profiles)
 - [MCP submissions](#mcp-submissions)
+- [Site handlers](#site-handlers)
 - [Files of earlier versions](#files-of-earlier-versions)
 <!-- /wikitool:toc -->
 
@@ -89,7 +90,7 @@ Each file is a JSON object of sections, one per feature, beside two keys of its
 `instance_id` sits in `wikitool.json` only. The first `wikitool config set` creates the file and
 the id; the id names the directory of the secrets file below. The sections are [telemetry](#telemetry),
 [remotes](#allowed-push-urls), [tasks, superproductivity and caldav](#task-tracker) and
-[upload](#mcp-submissions). `config set` names the sections it knows, and `doctor` reports a
+[upload](#mcp-submissions) and [sites](#site-handlers). `config set` names the sections it knows, and `doctor` reports a
 section it does not read as a `WARN`.
 
 **One place per value.** A value in the file its tier does not name is an error naming the file,
@@ -406,6 +407,68 @@ Example:
 
 Size and quota are your deployment's decision, not defaults worth copying blindly.
 
+## Site handlers
+
+`tools/wikitool raw fetch` knows how some websites serve their pages. For a URL of such a website a
+*site handler* fetches the page in the website's standard form, leaves the page furniture out of the
+derived text and prints hints about the page as `CHECK` lines; today there are two, both for
+`learn.microsoft.com`: `learn-microsoft` for every page of the host and
+`learn-microsoft-powershell-module` for a PowerShell module's overview page, which adds a hint
+naming the cmdlet pages it lists. Handlers are code in the stack - the instance does not write one.
+The `sites` section is what the instance decides about them, and it is optional: without it every
+handler applies, in the locale `en-us`.
+
+- `disabled` switches handlers off by name. A page of that website is then handled as any other:
+  fetched under the URL as typed, with its page furniture in the derived text. A name no handler has
+  is an error, so a typo cannot leave a handler on. Switching off a special handler leaves the
+  general one of the same website in force.
+- `locale` is the language segment a handler for a multi-language website puts into the URL it
+  fetches. The header of the derived text keeps the URL as typed under `requested_url`.
+- `notes` adds hint lines of the instance's own, printed after a fetch or an `--html` derivation of
+  a page of that host, whether or not a handler exists for it. An entry names a `host` (exact, lower
+  case), optionally a `path` (a regular expression matched against the start of the URL path, after
+  the standard form was applied) and one to three single-line `lines`. A host and path pattern appears
+  once; an entry whose `path` is left out applies to the whole host. A line is plain text and is
+  output as it is, so it is for a reminder to the reader of the capture, never for an instruction
+  the tool should carry out.
+
+<!-- wikitool:reference-config-sites -->
+| Field | Tier | Type | Required | Default | Description |
+|-------|------|------|----------|---------|-------------|
+| `disabled` | instance | array of strings | no | `[]` | The names of the site handlers that do not apply. `raw fetch` then treats a page of that website as it does any other. A name no handler has is an error when `raw fetch` reads the section, so a typo cannot leave a handler on. |
+| `locale` | instance | string | no | `"en-us"` | The locale a handler for a multi-language website fetches, in the website's own spelling and lower case. An empty value means the default. |
+| `notes` | instance | array of objects | no | `[]` | Hint lines of the instance's own, printed as `CHECK` lines after a fetch or an `--html` derivation of a page of that host. Each entry has `host` (exact, lower case), an optional `path` (a regular expression matched against the start of the URL path) and `lines` (one to 3 single-line strings of at most 300 characters). A host and path pattern appears once. |
+
+- **Absent:** Every handler applies, with the locale `en-us` and no further hint lines.
+- **Malformed:** An error when `raw fetch` reads it: it stops with exit 1 before fetching anything. A broken section is never read as "no handlers".
+
+Example:
+
+```json
+{
+  "sites": {
+    "disabled": [
+      "learn-microsoft-powershell-module"
+    ],
+    "locale": "en-us",
+    "notes": [
+      {
+        "host": "learn.microsoft.com",
+        "path": "^/[a-z-]+/azure/",
+        "lines": [
+          "Check the Azure retirement notice at the top of the page."
+        ]
+      }
+    ]
+  }
+}
+```
+<!-- /wikitool:reference-config-sites -->
+
+All three fields are instance-tier: what a website needs cleaned is the same in every clone, and none
+of them names a program or opens a gate. A section that does not read correctly stops `raw fetch`
+with exit 1 before it fetches anything.
+
 ## Files of earlier versions
 
 Until version 10 every feature above had a file of its own at the root: `.wikitool-telemetry.json`,