Use toml instead of json for settings.

docs/LOGGING.md

@@ -0,0 +1,46 @@
+# Cthulhu Logging Guidelines
+
+This document defines the preferred format for debug logging in Cthulhu.
+The goal is to keep logs consistent, searchable, and easy to scan.
+
+## Helpers
+
+Use the helpers in `cthulhu.debug` for new logs:
+
+- `debug.print_log(level, prefix, message, reason=None, timestamp=False, stack=False)`
+- `debug.print_log_tokens(level, prefix, tokens, reason=None, timestamp=False, stack=False)`
+
+These helpers ensure the prefix and optional reason tag are formatted consistently.
+Timestamps are appended at the end of the message when enabled.
+
+## Prefixes
+
+Use short, uppercase prefixes that identify the subsystem:
+
+- `EVENT MANAGER`
+- `FOCUS MANAGER`
+- `INPUT EVENT`
+- `SCRIPT MANAGER`
+- `WEB`
+
+## Messages
+
+- Keep messages short and action-focused.
+- Do not include the prefix in the message.
+- Prefer consistent verbs (e.g., "Not using …", "Setting …", "Ignoring …").
+
+## Reason Tags
+
+Use reason tags to explain decisions or early exits.
+
+- Lowercase with hyphens (e.g., `focus-mode`, `no-active-script`).
+- Use a short phrase rather than a full sentence.
+- If a human-readable reason is already available, it can be used directly.
+
+## Examples
+
+```text
+WEB: Not using caret navigation (reason=disabled)
+FOCUS MANAGER: Setting locus of focus to existing locus of focus (reason=no-change)
+SCRIPT MANAGER: Setting active script to [script] (reason=focus: active-window)
+```

docs/man/cthulhu.1

@@ -290,7 +290,7 @@ toggle the reading of tables, either by single cell or whole row.
 .B Cthulhu
 user preferences directory
 .TP
-.BI ~/.local/share/cthulhu/user-settings.conf
+.BI ~/.local/share/cthulhu/user-settings.toml
 .B Cthulhu
 user preferences configuration file.
 .TP