shell fully configurable

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@@ -395,8 +395,12 @@ Errors during configuration are non-terminal. In such a case any defaults which
 *** Configuration Values
 - CFG_RELISH_POSIX (default false): when true, enables POSIX style job control.
 - CFG_RELISH_ENV (default true): when true, interpreter's variable table and environment variable table are kept in sync.
-- CFG_RELISH_PROMPT (default (echo "λ ")): A *function* definition which is called in order to output the prompt for each loop of the REPL.
-  This function will be reloaded each REPL loop and will be called by the interpreter with no arguments.
+- CFG_RELISH_L_PROMPT (default 'λ'): a function that is called with no arguments to output the left hand of the prompt
+- CFG_RELISH_R_PROMPT (default ''): a function that is called with no arguments to output the right hand of the prompt
+- CFG_RELISH_PROMPT_DELIMITER (default '>'): a function that is called with no arguments to output the delimiter separating prompt from user input
+
+*** Prompt design
+For an example of prompt design see file:snippets/mood-prompt.rls
 
 *** Further configuration
 Further configuration can be done by loading scripts that contain more functions and data to evaluate.
@@ -477,12 +481,16 @@ Note: this section will not show the status of each item unless you are viewing
 Note: this section only tracks the state of incomplete TODO items. Having everything on here would be cluttered.
 
 ** TODO Pre-alpha tasks
-- Shell prompt is fully configurable (History, L, R, and Delim)
+- paths function
+- add-path function
 - Shell module
   - Only loadable via POSIX config var
   - Overload Load function to hook into this lib
   - arg processor because these are control flow
   - Process launching with environment variables
+  - "flag" function
+  - "switch" function
+  - "with" function (load with)
   - Optional form of process which allows fd redirecting
   - Background processes (bg function)
   - Foreground process TTY (fg function)
@@ -492,6 +500,9 @@ Note: this section only tracks the state of incomplete TODO items. Having everyt
 - make const all the error messages
 
 ** TODO alpha tasks
+- History length configurable
+- Search delim configurable
+- Escape sequences in strings
 - Rename to Flesh
 - master branch -> main branch
 - Create a dedicated community channel on matrix.sunnypup.io