Ask the binary for CLI options, not the wiki

`factorio --help` prints every option and ships with the game, so it describes
the version you actually have. It is also ahead of the wiki: it documents
`--map-preview-planet`, `--map-gen-seed-max` and `--exchange-string`, and it
states outright that `--map-gen-seed` "will override seed specified in map gen
settings" - the trap #232 hit, answered by the tool itself.

The wiki page stays named as a fallback for prose the help text does not carry.
The docs snapshot is verbatim, so it keeps the old wording and its header now
flags that one line as superseded.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017hVzDgUq6g7LATfczGxUrE

Author: wormeyman

CLAUDE.md

@@ -145,9 +145,19 @@ inert off WSL.
 
 ### Automate with the Factorio headless CLI
 
-A lot can be driven from the command line - see
-<https://wiki.factorio.com/Command_line_parameters> (a wiki page, not in the
-shipped API docs). Relevant here:
+**Ask the binary, not the wiki: `factorio --help` prints every option.** It
+ships with the game, so it describes the version you actually have, and it is
+ahead of the wiki - it documents `--map-preview-planet`, `--map-gen-seed-max`
+and `--exchange-string`, and it says outright that `--map-gen-seed` "will
+override seed specified in map gen settings", which is the trap #232 hit.
+<https://wiki.factorio.com/Command_line_parameters> is a fallback for prose the
+help text does not carry.
+
+```bash
+"$HOME/Library/Application Support/Steam/steamapps/common/Factorio/factorio.app/Contents/MacOS/factorio" --help
+```
+
+Relevant here:
 
 - **Map-gen testing:** `factorio --create <save> --map-gen-settings <json>
 --map-gen-seed <n> --mod-directory <dir>` runs headless and exits cleanly even

docs/factorio-reference-and-oracle.md

@@ -30,6 +30,11 @@ rule.
 Nothing below has been edited. It is a snapshot; `CLAUDE.md` is the current
 state.
 
+**One thing below is already superseded.** The headless-CLI section points at
+`wiki.factorio.com/Command_line_parameters` first. Run `factorio --help`
+instead: it ships with the game, so it describes the version you actually have,
+and it is ahead of the wiki.
+
 ---
 
 ## Factorio reference material - read it with `factorio-oracle refs`