From ff121fcbb461a4d8f768e87128facf32e6272889 Mon Sep 17 00:00:00 2001
From: _ov4 <ov4@ov4.org>
Date: Tue, 13 Oct 2026 14:25:59 +0000
Subject: Group language manuals into function and keyword directories

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
---
 doc/language/cpsc-function-asc.7.md                | 28 ---------
 doc/language/cpsc-function-chr.7.md                | 28 ---------
 doc/language/cpsc-function-eof.7.md                | 34 -----------
 doc/language/cpsc-function-is_num.7.md             | 28 ---------
 doc/language/cpsc-function-lcase.7.md              | 28 ---------
 doc/language/cpsc-function-left.7.md               | 27 ---------
 doc/language/cpsc-function-length.7.md             | 27 ---------
 doc/language/cpsc-function-mid.7.md                | 28 ---------
 doc/language/cpsc-function-num_to_str.7.md         | 27 ---------
 doc/language/cpsc-function-right.7.md              | 27 ---------
 doc/language/cpsc-function-str_to_num.7.md         | 28 ---------
 doc/language/cpsc-function-ucase.7.md              | 28 ---------
 doc/language/cpsc-keyword-and.7.md                 | 28 ---------
 doc/language/cpsc-keyword-call.7.md                | 31 ----------
 doc/language/cpsc-keyword-class.7.md               | 43 --------------
 doc/language/cpsc-keyword-closefile.7.md           | 29 ----------
 doc/language/cpsc-keyword-declare.7.md             | 40 -------------
 doc/language/cpsc-keyword-div.7.md                 | 28 ---------
 doc/language/cpsc-keyword-for.7.md                 | 35 ------------
 doc/language/cpsc-keyword-function.7.md            | 41 --------------
 doc/language/cpsc-keyword-if.7.md                  | 35 ------------
 doc/language/cpsc-keyword-input.7.md               | 31 ----------
 doc/language/cpsc-keyword-mod.7.md                 | 29 ----------
 doc/language/cpsc-keyword-not.7.md                 | 27 ---------
 doc/language/cpsc-keyword-openfile.7.md            | 37 ------------
 doc/language/cpsc-keyword-or.7.md                  | 28 ---------
 doc/language/cpsc-keyword-output.7.md              | 32 -----------
 doc/language/cpsc-keyword-procedure.7.md           | 43 --------------
 doc/language/cpsc-keyword-readfile.7.md            | 34 -----------
 doc/language/cpsc-keyword-repeat.7.md              | 34 -----------
 doc/language/cpsc-keyword-type.7.md                | 53 -----------------
 doc/language/cpsc-keyword-while.7.md               | 34 -----------
 doc/language/cpsc-keyword-writefile.7.md           | 30 ----------
 doc/language/cpsc-language-overview.7.md           | 66 +++++++++++-----------
 doc/language/function/cpsc-function-asc.7.md       | 28 +++++++++
 doc/language/function/cpsc-function-chr.7.md       | 28 +++++++++
 doc/language/function/cpsc-function-eof.7.md       | 34 +++++++++++
 doc/language/function/cpsc-function-is_num.7.md    | 28 +++++++++
 doc/language/function/cpsc-function-lcase.7.md     | 28 +++++++++
 doc/language/function/cpsc-function-left.7.md      | 27 +++++++++
 doc/language/function/cpsc-function-length.7.md    | 27 +++++++++
 doc/language/function/cpsc-function-mid.7.md       | 28 +++++++++
 .../function/cpsc-function-num_to_str.7.md         | 27 +++++++++
 doc/language/function/cpsc-function-right.7.md     | 27 +++++++++
 .../function/cpsc-function-str_to_num.7.md         | 28 +++++++++
 doc/language/function/cpsc-function-ucase.7.md     | 28 +++++++++
 doc/language/keyword/cpsc-keyword-and.7.md         | 28 +++++++++
 doc/language/keyword/cpsc-keyword-call.7.md        | 31 ++++++++++
 doc/language/keyword/cpsc-keyword-class.7.md       | 43 ++++++++++++++
 doc/language/keyword/cpsc-keyword-closefile.7.md   | 29 ++++++++++
 doc/language/keyword/cpsc-keyword-declare.7.md     | 40 +++++++++++++
 doc/language/keyword/cpsc-keyword-div.7.md         | 28 +++++++++
 doc/language/keyword/cpsc-keyword-for.7.md         | 35 ++++++++++++
 doc/language/keyword/cpsc-keyword-function.7.md    | 41 ++++++++++++++
 doc/language/keyword/cpsc-keyword-if.7.md          | 35 ++++++++++++
 doc/language/keyword/cpsc-keyword-input.7.md       | 31 ++++++++++
 doc/language/keyword/cpsc-keyword-mod.7.md         | 29 ++++++++++
 doc/language/keyword/cpsc-keyword-not.7.md         | 27 +++++++++
 doc/language/keyword/cpsc-keyword-openfile.7.md    | 37 ++++++++++++
 doc/language/keyword/cpsc-keyword-or.7.md          | 28 +++++++++
 doc/language/keyword/cpsc-keyword-output.7.md      | 32 +++++++++++
 doc/language/keyword/cpsc-keyword-procedure.7.md   | 43 ++++++++++++++
 doc/language/keyword/cpsc-keyword-readfile.7.md    | 34 +++++++++++
 doc/language/keyword/cpsc-keyword-repeat.7.md      | 34 +++++++++++
 doc/language/keyword/cpsc-keyword-type.7.md        | 53 +++++++++++++++++
 doc/language/keyword/cpsc-keyword-while.7.md       | 34 +++++++++++
 doc/language/keyword/cpsc-keyword-writefile.7.md   | 30 ++++++++++
 67 files changed, 1093 insertions(+), 1093 deletions(-)
 delete mode 100644 doc/language/cpsc-function-asc.7.md
 delete mode 100644 doc/language/cpsc-function-chr.7.md
 delete mode 100644 doc/language/cpsc-function-eof.7.md
 delete mode 100644 doc/language/cpsc-function-is_num.7.md
 delete mode 100644 doc/language/cpsc-function-lcase.7.md
 delete mode 100644 doc/language/cpsc-function-left.7.md
 delete mode 100644 doc/language/cpsc-function-length.7.md
 delete mode 100644 doc/language/cpsc-function-mid.7.md
 delete mode 100644 doc/language/cpsc-function-num_to_str.7.md
 delete mode 100644 doc/language/cpsc-function-right.7.md
 delete mode 100644 doc/language/cpsc-function-str_to_num.7.md
 delete mode 100644 doc/language/cpsc-function-ucase.7.md
 delete mode 100644 doc/language/cpsc-keyword-and.7.md
 delete mode 100644 doc/language/cpsc-keyword-call.7.md
 delete mode 100644 doc/language/cpsc-keyword-class.7.md
 delete mode 100644 doc/language/cpsc-keyword-closefile.7.md
 delete mode 100644 doc/language/cpsc-keyword-declare.7.md
 delete mode 100644 doc/language/cpsc-keyword-div.7.md
 delete mode 100644 doc/language/cpsc-keyword-for.7.md
 delete mode 100644 doc/language/cpsc-keyword-function.7.md
 delete mode 100644 doc/language/cpsc-keyword-if.7.md
 delete mode 100644 doc/language/cpsc-keyword-input.7.md
 delete mode 100644 doc/language/cpsc-keyword-mod.7.md
 delete mode 100644 doc/language/cpsc-keyword-not.7.md
 delete mode 100644 doc/language/cpsc-keyword-openfile.7.md
 delete mode 100644 doc/language/cpsc-keyword-or.7.md
 delete mode 100644 doc/language/cpsc-keyword-output.7.md
 delete mode 100644 doc/language/cpsc-keyword-procedure.7.md
 delete mode 100644 doc/language/cpsc-keyword-readfile.7.md
 delete mode 100644 doc/language/cpsc-keyword-repeat.7.md
 delete mode 100644 doc/language/cpsc-keyword-type.7.md
 delete mode 100644 doc/language/cpsc-keyword-while.7.md
 delete mode 100644 doc/language/cpsc-keyword-writefile.7.md
 create mode 100644 doc/language/function/cpsc-function-asc.7.md
 create mode 100644 doc/language/function/cpsc-function-chr.7.md
 create mode 100644 doc/language/function/cpsc-function-eof.7.md
 create mode 100644 doc/language/function/cpsc-function-is_num.7.md
 create mode 100644 doc/language/function/cpsc-function-lcase.7.md
 create mode 100644 doc/language/function/cpsc-function-left.7.md
 create mode 100644 doc/language/function/cpsc-function-length.7.md
 create mode 100644 doc/language/function/cpsc-function-mid.7.md
 create mode 100644 doc/language/function/cpsc-function-num_to_str.7.md
 create mode 100644 doc/language/function/cpsc-function-right.7.md
 create mode 100644 doc/language/function/cpsc-function-str_to_num.7.md
 create mode 100644 doc/language/function/cpsc-function-ucase.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-and.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-call.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-class.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-closefile.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-declare.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-div.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-for.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-function.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-if.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-input.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-mod.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-not.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-openfile.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-or.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-output.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-procedure.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-readfile.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-repeat.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-type.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-while.7.md
 create mode 100644 doc/language/keyword/cpsc-keyword-writefile.7.md

(limited to 'doc/language')

diff --git a/doc/language/cpsc-function-asc.7.md b/doc/language/cpsc-function-asc.7.md
deleted file mode 100644
index 0600599..0000000
--- a/doc/language/cpsc-function-asc.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-ASC(7)
-
-# NAME
-
-cpsc-function-asc - find a character's byte code
-
-# SYNOPSIS
-
-```text
-ASC(character : CHAR) RETURNS INTEGER
-ASC(text : STRING) RETURNS INTEGER
-```
-
-# DESCRIPTION
-
-Return the unsigned byte code of the character, or of the first byte of a
-string. Use a nonempty string; for ASCII characters this is the ASCII code.
-
-# EXAMPLE
-
-```text
-OUTPUT ASC('A')
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-chr(7)](cpsc-function-chr.7.md).
-
diff --git a/doc/language/cpsc-function-chr.7.md b/doc/language/cpsc-function-chr.7.md
deleted file mode 100644
index 5062468..0000000
--- a/doc/language/cpsc-function-chr.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-CHR(7)
-
-# NAME
-
-cpsc-function-chr - convert a byte code to text
-
-# SYNOPSIS
-
-```text
-CHR(code : INTEGER) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Convert the low eight bits of code to a one-byte string.
-The result is STRING, not CHAR. Use ASCII codes 1 to 127 for
-ordinary text; code 0 produces an empty string.
-
-# EXAMPLE
-
-```text
-OUTPUT CHR(65)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-asc(7)](cpsc-function-asc.7.md).
-
diff --git a/doc/language/cpsc-function-eof.7.md b/doc/language/cpsc-function-eof.7.md
deleted file mode 100644
index 721e667..0000000
--- a/doc/language/cpsc-function-eof.7.md
+++ /dev/null
@@ -1,34 +0,0 @@
-% CPSC-FUNCTION-EOF(7)
-
-# NAME
-
-cpsc-function-eof - test for the end of a text file
-
-# SYNOPSIS
-
-```text
-EOF(filename : STRING) RETURNS BOOLEAN
-```
-
-# DESCRIPTION
-
-Return true when no further characters remain in a file opened FOR READ.
-The test does not consume the next character. Testing an unopened file or
-a file in the wrong mode terminates execution.
-
-# EXAMPLE
-
-```text
-DECLARE Line : STRING
-OPENFILE "notes.txt" FOR READ
-WHILE NOT EOF("notes.txt") DO
-    READFILE "notes.txt", Line
-    OUTPUT Line
-ENDWHILE
-CLOSEFILE "notes.txt"
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-readfile(7)](cpsc-keyword-readfile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md).
-
diff --git a/doc/language/cpsc-function-is_num.7.md b/doc/language/cpsc-function-is_num.7.md
deleted file mode 100644
index de37b71..0000000
--- a/doc/language/cpsc-function-is_num.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-IS_NUM(7)
-
-# NAME
-
-cpsc-function-is_num - test whether text represents a number
-
-# SYNOPSIS
-
-```text
-IS_NUM(text : STRING) RETURNS BOOLEAN
-```
-
-# DESCRIPTION
-
-Return true for a nonempty string fully consumed by the runtime's
-numeric conversion. Leading whitespace is accepted; trailing whitespace
-or other trailing text is rejected.
-
-# EXAMPLE
-
-```text
-OUTPUT IS_NUM("12.5")
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-str_to_num(7)](cpsc-function-str_to_num.7.md).
-
diff --git a/doc/language/cpsc-function-lcase.7.md b/doc/language/cpsc-function-lcase.7.md
deleted file mode 100644
index f6ca334..0000000
--- a/doc/language/cpsc-function-lcase.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-LCASE(7)
-
-# NAME
-
-cpsc-function-lcase - convert text to lower case
-
-# SYNOPSIS
-
-```text
-LCASE(text : STRING) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Return a copy with letters converted to lower case. Unlike guide section 5.5's
-CHAR-to-CHAR signature, cpsc accepts text and returns STRING. Use ASCII
-text for predictable character conversion.
-
-# EXAMPLE
-
-```text
-OUTPUT LCASE("HELLO")
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-ucase(7)](cpsc-function-ucase.7.md).
-
diff --git a/doc/language/cpsc-function-left.7.md b/doc/language/cpsc-function-left.7.md
deleted file mode 100644
index b4542d6..0000000
--- a/doc/language/cpsc-function-left.7.md
+++ /dev/null
@@ -1,27 +0,0 @@
-% CPSC-FUNCTION-LEFT(7)
-
-# NAME
-
-cpsc-function-left - extract the beginning of a string
-
-# SYNOPSIS
-
-```text
-LEFT(text : STRING, count : INTEGER) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Return up to count bytes from the beginning. Counts larger than the string
-length return the whole string; negative counts return an empty string.
-
-# EXAMPLE
-
-```text
-OUTPUT LEFT("Hello", 2)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-right(7)](cpsc-function-right.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md).
-
diff --git a/doc/language/cpsc-function-length.7.md b/doc/language/cpsc-function-length.7.md
deleted file mode 100644
index a7f6acf..0000000
--- a/doc/language/cpsc-function-length.7.md
+++ /dev/null
@@ -1,27 +0,0 @@
-% CPSC-FUNCTION-LENGTH(7)
-
-# NAME
-
-cpsc-function-length - find a string's length
-
-# SYNOPSIS
-
-```text
-LENGTH(text : STRING) RETURNS INTEGER
-```
-
-# DESCRIPTION
-
-Return the number of bytes before the string terminator. String operations
-are byte-based, so this is not a Unicode character count.
-
-# EXAMPLE
-
-```text
-OUTPUT LENGTH("Hello")
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-right(7)](cpsc-function-right.7.md).
-
diff --git a/doc/language/cpsc-function-mid.7.md b/doc/language/cpsc-function-mid.7.md
deleted file mode 100644
index 3a6bc71..0000000
--- a/doc/language/cpsc-function-mid.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-MID(7)
-
-# NAME
-
-cpsc-function-mid - extract part of a string
-
-# SYNOPSIS
-
-```text
-MID(text : STRING, start : INTEGER, count : INTEGER) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Return up to count bytes starting at the one-based position start.
-Positions below 1 clamp to 1; positions beyond the end return an empty string.
-The count clamps to the available bytes; negative counts return an empty string.
-
-# EXAMPLE
-
-```text
-OUTPUT MID("ABCDEFGH", 2, 3)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-right(7)](cpsc-function-right.7.md), [cpsc-function-length(7)](cpsc-function-length.7.md).
-
diff --git a/doc/language/cpsc-function-num_to_str.7.md b/doc/language/cpsc-function-num_to_str.7.md
deleted file mode 100644
index 30dc39b..0000000
--- a/doc/language/cpsc-function-num_to_str.7.md
+++ /dev/null
@@ -1,27 +0,0 @@
-% CPSC-FUNCTION-NUM_TO_STR(7)
-
-# NAME
-
-cpsc-function-num_to_str - convert a number to text
-
-# SYNOPSIS
-
-```text
-NUM_TO_STR(number : INTEGER or REAL) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Format INTEGER as signed decimal text and REAL with six digits after the
-decimal point.
-
-# EXAMPLE
-
-```text
-OUTPUT NUM_TO_STR(42), " ", NUM_TO_STR(3.5)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-str_to_num(7)](cpsc-function-str_to_num.7.md).
-
diff --git a/doc/language/cpsc-function-right.7.md b/doc/language/cpsc-function-right.7.md
deleted file mode 100644
index ae9114b..0000000
--- a/doc/language/cpsc-function-right.7.md
+++ /dev/null
@@ -1,27 +0,0 @@
-% CPSC-FUNCTION-RIGHT(7)
-
-# NAME
-
-cpsc-function-right - extract the end of a string
-
-# SYNOPSIS
-
-```text
-RIGHT(text : STRING, count : INTEGER) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Return up to count bytes from the end. Use a nonnegative count.
-Counts larger than the string length return the whole string.
-
-# EXAMPLE
-
-```text
-OUTPUT RIGHT("Hello", 2)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md).
-
diff --git a/doc/language/cpsc-function-str_to_num.7.md b/doc/language/cpsc-function-str_to_num.7.md
deleted file mode 100644
index 6128a13..0000000
--- a/doc/language/cpsc-function-str_to_num.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-STR_TO_NUM(7)
-
-# NAME
-
-cpsc-function-str_to_num - convert text to a real number
-
-# SYNOPSIS
-
-```text
-STR_TO_NUM(text : STRING) RETURNS REAL
-```
-
-# DESCRIPTION
-
-Return REAL, including for integer-looking text. Conversion can stop at
-trailing text; invalid text returns zero. Use IS_NUM first when the whole
-string must be a valid number.
-
-# EXAMPLE
-
-```text
-OUTPUT STR_TO_NUM("12.5")
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-is_num(7)](cpsc-function-is_num.7.md), [cpsc-function-num_to_str(7)](cpsc-function-num_to_str.7.md).
-
diff --git a/doc/language/cpsc-function-ucase.7.md b/doc/language/cpsc-function-ucase.7.md
deleted file mode 100644
index dd44892..0000000
--- a/doc/language/cpsc-function-ucase.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-FUNCTION-UCASE(7)
-
-# NAME
-
-cpsc-function-ucase - convert text to upper case
-
-# SYNOPSIS
-
-```text
-UCASE(text : STRING) RETURNS STRING
-```
-
-# DESCRIPTION
-
-Return a copy with letters converted to upper case. Unlike guide section 5.5's
-CHAR-to-CHAR signature, cpsc accepts text and returns STRING. Use ASCII
-text for predictable character conversion.
-
-# EXAMPLE
-
-```text
-OUTPUT UCASE("Hello")
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-function-lcase(7)](cpsc-function-lcase.7.md).
-
diff --git a/doc/language/cpsc-keyword-and.7.md b/doc/language/cpsc-keyword-and.7.md
deleted file mode 100644
index 6b98abf..0000000
--- a/doc/language/cpsc-keyword-and.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-KEYWORD-AND(7)
-
-# NAME
-
-cpsc-keyword-and - combine conditions with logical AND
-
-# SYNOPSIS
-
-```text
-left AND right
-```
-
-# DESCRIPTION
-
-Return BOOLEAN: true when both operands are true. Both operands are
-evaluated; AND does not short-circuit. AND binds more tightly than OR
-and less tightly than comparisons. Use parentheses for clarity.
-
-# EXAMPLE
-
-```text
-OUTPUT (3 > 2) AND (4 > 1)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-or(7)](cpsc-keyword-or.7.md), [cpsc-keyword-not(7)](cpsc-keyword-not.7.md), [cpsc-keyword-if(7)](cpsc-keyword-if.7.md).
-
diff --git a/doc/language/cpsc-keyword-call.7.md b/doc/language/cpsc-keyword-call.7.md
deleted file mode 100644
index b17b3f4..0000000
--- a/doc/language/cpsc-keyword-call.7.md
+++ /dev/null
@@ -1,31 +0,0 @@
-% CPSC-KEYWORD-CALL(7)
-
-# NAME
-
-cpsc-keyword-call - invoke a procedure
-
-# SYNOPSIS
-
-```text
-CALL name(arguments)
-```
-
-# DESCRIPTION
-
-Invoke a previously declared procedure with its parameters. Empty argument
-lists may be written `CALL name()` or `CALL name`.
-Use function calls in expressions to obtain their results.
-
-# EXAMPLE
-
-```text
-PROCEDURE Hello()
-    OUTPUT "Hello"
-ENDPROCEDURE
-CALL Hello()
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-procedure(7)](cpsc-keyword-procedure.7.md), [cpsc-keyword-function(7)](cpsc-keyword-function.7.md).
-
diff --git a/doc/language/cpsc-keyword-class.7.md b/doc/language/cpsc-keyword-class.7.md
deleted file mode 100644
index 7ff32ba..0000000
--- a/doc/language/cpsc-keyword-class.7.md
+++ /dev/null
@@ -1,43 +0,0 @@
-% CPSC-KEYWORD-CLASS(7)
-
-# NAME
-
-cpsc-keyword-class - define a class with public and private fields
-
-# SYNOPSIS
-
-```text
-CLASS name
-    PUBLIC field : type
-    PRIVATE field : type
-ENDCLASS
-```
-
-# DESCRIPTION
-
-Declare a class at top level with at least one field. Every field explicitly
-requires PUBLIC or PRIVATE, without DECLARE. This differs from guide
-section 10's default-public rule. ENDCLASS closes the declaration.
-
-Classes use record value semantics: zero initialization, whole-value copying,
-arrays, pointers, and ordinary function/procedure parameters. Only PUBLIC
-fields can be accessed externally. PRIVATE fields still initialize and copy
-with the whole value. Methods, constructors, destructors, NEW, INHERITS,
-and array fields are unsupported.
-
-# EXAMPLE
-
-```text
-CLASS Person
-    PUBLIC Name : STRING
-    PRIVATE Age : INTEGER
-ENDCLASS
-DECLARE PersonValue : Person
-PersonValue.Name <- "Alice"
-OUTPUT PersonValue.Name
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-type(7)](cpsc-keyword-type.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md).
-
diff --git a/doc/language/cpsc-keyword-closefile.7.md b/doc/language/cpsc-keyword-closefile.7.md
deleted file mode 100644
index b986b86..0000000
--- a/doc/language/cpsc-keyword-closefile.7.md
+++ /dev/null
@@ -1,29 +0,0 @@
-% CPSC-KEYWORD-CLOSEFILE(7)
-
-# NAME
-
-cpsc-keyword-closefile - close a text file
-
-# SYNOPSIS
-
-```text
-CLOSEFILE filename
-```
-
-# DESCRIPTION
-
-Close the file associated with this filename string and release its open-file
-slot. Closing a filename that is not open terminates execution.
-
-# EXAMPLE
-
-```text
-OPENFILE "notes.txt" FOR WRITE
-WRITEFILE "notes.txt", "Done"
-CLOSEFILE "notes.txt"
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-readfile(7)](cpsc-keyword-readfile.7.md), [cpsc-keyword-writefile(7)](cpsc-keyword-writefile.7.md).
-
diff --git a/doc/language/cpsc-keyword-declare.7.md b/doc/language/cpsc-keyword-declare.7.md
deleted file mode 100644
index 887ae12..0000000
--- a/doc/language/cpsc-keyword-declare.7.md
+++ /dev/null
@@ -1,40 +0,0 @@
-% CPSC-KEYWORD-DECLARE(7)
-
-# NAME
-
-cpsc-keyword-declare - declare variables and arrays
-
-# SYNOPSIS
-
-```text
-DECLARE name : type
-DECLARE name : ARRAY[lower:upper, ...] OF type
-```
-
-# DESCRIPTION
-
-Declare one variable per statement. Built-in types are INTEGER (signed 64-bit),
-REAL, BOOLEAN, CHAR (one byte), and STRING. User-defined TYPE and CLASS names
-are also accepted. Variables start with zero, FALSE, an empty string, or a
-zero-initialized user-defined value.
-
-ARRAY bounds are inclusive and may be expressions; multiple ranges create
-multiple dimensions. Access elements with `name[index, ...]`. Bounds are
-checked at run time. Whole-array assignment is unsupported. Declare arrays
-before using them; arrays declared inside a control-flow block stay in that
-block.
-
-# EXAMPLE
-
-```text
-DECLARE Count : INTEGER
-DECLARE Names : ARRAY[1:3] OF STRING
-Count <- 2
-Names[Count] <- "Alice"
-OUTPUT Names[Count]
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-type(7)](cpsc-keyword-type.7.md), [cpsc-keyword-class(7)](cpsc-keyword-class.7.md), [cpsc-keyword-output(7)](cpsc-keyword-output.7.md).
-
diff --git a/doc/language/cpsc-keyword-div.7.md b/doc/language/cpsc-keyword-div.7.md
deleted file mode 100644
index 78715e1..0000000
--- a/doc/language/cpsc-keyword-div.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-KEYWORD-DIV(7)
-
-# NAME
-
-cpsc-keyword-div - perform integer division
-
-# SYNOPSIS
-
-```text
-left DIV right
-```
-
-# DESCRIPTION
-
-Both operands must be INTEGER. Return the quotient truncated toward zero.
-A zero divisor terminates execution. DIV has the same precedence as
-multiplication. Use `/` for division returning REAL.
-
-# EXAMPLE
-
-```text
-OUTPUT 7 DIV 2
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-mod(7)](cpsc-keyword-mod.7.md).
-
diff --git a/doc/language/cpsc-keyword-for.7.md b/doc/language/cpsc-keyword-for.7.md
deleted file mode 100644
index 201a492..0000000
--- a/doc/language/cpsc-keyword-for.7.md
+++ /dev/null
@@ -1,35 +0,0 @@
-% CPSC-KEYWORD-FOR(7)
-
-# NAME
-
-cpsc-keyword-for - iterate over an integer range
-
-# SYNOPSIS
-
-```text
-FOR variable <- start TO finish [STEP increment]
-    statements
-NEXT variable
-```
-
-# DESCRIPTION
-
-The loop variable must already be declared INTEGER. Both endpoints are
-inclusive. STEP defaults to 1; use a negative value to count down.
-STEP is evaluated once, while the finish expression is evaluated each
-iteration. NEXT must name the same variable. Use a nonzero STEP.
-TO, STEP, and NEXT belong to this syntax.
-
-# EXAMPLE
-
-```text
-DECLARE Index : INTEGER
-FOR Index <- 3 TO 1 STEP -1
-    OUTPUT Index
-NEXT Index
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md), [cpsc-keyword-while(7)](cpsc-keyword-while.7.md).
-
diff --git a/doc/language/cpsc-keyword-function.7.md b/doc/language/cpsc-keyword-function.7.md
deleted file mode 100644
index c37754c..0000000
--- a/doc/language/cpsc-keyword-function.7.md
+++ /dev/null
@@ -1,41 +0,0 @@
-% CPSC-KEYWORD-FUNCTION(7)
-
-# NAME
-
-cpsc-keyword-function - define a function that returns a value
-
-# SYNOPSIS
-
-```text
-FUNCTION name(parameters) RETURNS type
-    statements
-    RETURN expression
-ENDFUNCTION
-```
-
-# DESCRIPTION
-
-Call a function in an expression as `name(arguments)`. A call may precede its
-top-level definition. RETURNS specifies the result type; omitting it defaults
-to INTEGER. RETURN supplies a value of that type. Whole-array results are
-unsupported.
-
-Parameters use `name : type`, optionally prefixed by BYVAL. BYVAL is the
-default; BYREF is forbidden for functions (guide section 8.3).
-Array parameters accept `ARRAY OF type` (one dimension) or
-`ARRAY[lower:upper, ...] OF type` (integer literal bounds).
-BYVAL arrays are copied. RETURNS, RETURN, BYVAL, and ENDFUNCTION belong here.
-
-# EXAMPLE
-
-```text
-FUNCTION Double(Value : INTEGER) RETURNS INTEGER
-    RETURN Value * 2
-ENDFUNCTION
-OUTPUT Double(4)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-procedure(7)](cpsc-keyword-procedure.7.md), [cpsc-keyword-call(7)](cpsc-keyword-call.7.md).
-
diff --git a/doc/language/cpsc-keyword-if.7.md b/doc/language/cpsc-keyword-if.7.md
deleted file mode 100644
index 9f14959..0000000
--- a/doc/language/cpsc-keyword-if.7.md
+++ /dev/null
@@ -1,35 +0,0 @@
-% CPSC-KEYWORD-IF(7)
-
-# NAME
-
-cpsc-keyword-if - choose between branches
-
-# SYNOPSIS
-
-```text
-IF condition THEN
-    statements
-ELSE
-    statements
-ENDIF
-```
-
-# DESCRIPTION
-
-Execute the THEN branch when the condition is true, otherwise the optional
-ELSE branch. Blocks may be nested. THEN, ELSE, and ENDIF belong to this syntax.
-
-# EXAMPLE
-
-```text
-IF 3 > 2 THEN
-    OUTPUT "yes"
-ELSE
-    OUTPUT "no"
-ENDIF
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-and(7)](cpsc-keyword-and.7.md), [cpsc-keyword-or(7)](cpsc-keyword-or.7.md), [cpsc-keyword-not(7)](cpsc-keyword-not.7.md).
-
diff --git a/doc/language/cpsc-keyword-input.7.md b/doc/language/cpsc-keyword-input.7.md
deleted file mode 100644
index f31731f..0000000
--- a/doc/language/cpsc-keyword-input.7.md
+++ /dev/null
@@ -1,31 +0,0 @@
-% CPSC-KEYWORD-INPUT(7)
-
-# NAME
-
-cpsc-keyword-input - read a value from standard input
-
-# SYNOPSIS
-
-```text
-INPUT variable
-```
-
-# DESCRIPTION
-
-Read into a previously declared INTEGER, REAL, BOOLEAN, CHAR, or STRING
-variable. STRING input reads one whitespace-delimited word. The target must
-be a plain variable; array elements and record/class fields are unsupported,
-unlike the wider INPUT syntax in guide section 5.1.
-
-# EXAMPLE
-
-```text
-DECLARE Name : STRING
-INPUT Name
-OUTPUT Name
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md), [cpsc-keyword-output(7)](cpsc-keyword-output.7.md).
-
diff --git a/doc/language/cpsc-keyword-mod.7.md b/doc/language/cpsc-keyword-mod.7.md
deleted file mode 100644
index cb437a4..0000000
--- a/doc/language/cpsc-keyword-mod.7.md
+++ /dev/null
@@ -1,29 +0,0 @@
-% CPSC-KEYWORD-MOD(7)
-
-# NAME
-
-cpsc-keyword-mod - find the integer division remainder
-
-# SYNOPSIS
-
-```text
-left MOD right
-```
-
-# DESCRIPTION
-
-Both operands must be INTEGER. Return the remainder after division truncated
-toward zero; a nonzero remainder has the dividend's sign.
-A zero divisor terminates execution. MOD has the same precedence as
-multiplication.
-
-# EXAMPLE
-
-```text
-OUTPUT 7 MOD 2
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-div(7)](cpsc-keyword-div.7.md).
-
diff --git a/doc/language/cpsc-keyword-not.7.md b/doc/language/cpsc-keyword-not.7.md
deleted file mode 100644
index 5bb1c18..0000000
--- a/doc/language/cpsc-keyword-not.7.md
+++ /dev/null
@@ -1,27 +0,0 @@
-% CPSC-KEYWORD-NOT(7)
-
-# NAME
-
-cpsc-keyword-not - negate a condition
-
-# SYNOPSIS
-
-```text
-NOT expression
-```
-
-# DESCRIPTION
-
-Return BOOLEAN with the opposite truth value. NOT is a unary operator;
-parenthesize comparisons, for example `NOT (Count = 0)`.
-
-# EXAMPLE
-
-```text
-OUTPUT NOT (3 = 2)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-and(7)](cpsc-keyword-and.7.md), [cpsc-keyword-or(7)](cpsc-keyword-or.7.md), [cpsc-keyword-if(7)](cpsc-keyword-if.7.md).
-
diff --git a/doc/language/cpsc-keyword-openfile.7.md b/doc/language/cpsc-keyword-openfile.7.md
deleted file mode 100644
index a13b3f4..0000000
--- a/doc/language/cpsc-keyword-openfile.7.md
+++ /dev/null
@@ -1,37 +0,0 @@
-% CPSC-KEYWORD-OPENFILE(7)
-
-# NAME
-
-cpsc-keyword-openfile - open a text file
-
-# SYNOPSIS
-
-```text
-OPENFILE filename FOR READ
-OPENFILE filename FOR WRITE
-OPENFILE filename FOR APPEND
-```
-
-# DESCRIPTION
-
-The filename is a STRING expression. READ opens an existing file for reading;
-WRITE creates or truncates a file; APPEND writes at the end, creating the file
-if needed. READ, WRITE, APPEND, and this use of FOR belong here.
-
-At most 16 files may be open at once. Use the same filename string for
-subsequent operations. Reopening an open filename, failed opens, and wrong-mode
-operations terminate execution with a fatal diagnostic. RANDOM is reserved
-but unsupported.
-
-# EXAMPLE
-
-```text
-OPENFILE "notes.txt" FOR WRITE
-WRITEFILE "notes.txt", "Hello"
-CLOSEFILE "notes.txt"
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-readfile(7)](cpsc-keyword-readfile.7.md), [cpsc-keyword-writefile(7)](cpsc-keyword-writefile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md).
-
diff --git a/doc/language/cpsc-keyword-or.7.md b/doc/language/cpsc-keyword-or.7.md
deleted file mode 100644
index 7fca628..0000000
--- a/doc/language/cpsc-keyword-or.7.md
+++ /dev/null
@@ -1,28 +0,0 @@
-% CPSC-KEYWORD-OR(7)
-
-# NAME
-
-cpsc-keyword-or - combine conditions with logical OR
-
-# SYNOPSIS
-
-```text
-left OR right
-```
-
-# DESCRIPTION
-
-Return BOOLEAN: true when either operand is true. Both operands are
-evaluated; OR does not short-circuit. OR binds less tightly than AND
-and comparisons.
-
-# EXAMPLE
-
-```text
-OUTPUT (3 < 2) OR (4 > 1)
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-and(7)](cpsc-keyword-and.7.md), [cpsc-keyword-not(7)](cpsc-keyword-not.7.md), [cpsc-keyword-if(7)](cpsc-keyword-if.7.md).
-
diff --git a/doc/language/cpsc-keyword-output.7.md b/doc/language/cpsc-keyword-output.7.md
deleted file mode 100644
index 9ee2133..0000000
--- a/doc/language/cpsc-keyword-output.7.md
+++ /dev/null
@@ -1,32 +0,0 @@
-% CPSC-KEYWORD-OUTPUT(7)
-
-# NAME
-
-cpsc-keyword-output - print values to standard output
-
-# SYNOPSIS
-
-```text
-OUTPUT expression, ...
-```
-
-# DESCRIPTION
-
-Print expressions from left to right without automatic separators, then add
-a newline. Strings print their contents; BOOLEAN prints TRUE or FALSE.
-Whole arrays and partially indexed arrays print their elements one per line;
-a final array adds no extra newline. Records, classes, and pointers cannot
-be printed directly.
-
-# EXAMPLE
-
-```text
-DECLARE Score : INTEGER
-Score <- 10
-OUTPUT "Score: ", Score
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-input(7)](cpsc-keyword-input.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md).
-
diff --git a/doc/language/cpsc-keyword-procedure.7.md b/doc/language/cpsc-keyword-procedure.7.md
deleted file mode 100644
index b2e6108..0000000
--- a/doc/language/cpsc-keyword-procedure.7.md
+++ /dev/null
@@ -1,43 +0,0 @@
-% CPSC-KEYWORD-PROCEDURE(7)
-
-# NAME
-
-cpsc-keyword-procedure - define a procedure and parameter modes
-
-# SYNOPSIS
-
-```text
-PROCEDURE name(parameters)
-    statements
-ENDPROCEDURE
-```
-
-# DESCRIPTION
-
-Invoke with CALL. Parameters use `name : type`, optionally prefixed by
-BYVAL or BYREF. The default is BYVAL (copy); BYREF modifies the caller's
-variable and requires an exact type match. Scalar BYREF arguments must be
-plain variables. A mode remains in effect for following parameters until
-another mode is specified.
-
-Arrays accept `ARRAY OF type` or `ARRAY[lower:upper, ...] OF type`;
-explicit bounds must be integer literals. BYVAL copies the array; BYREF
-shares it. Bare RETURN can exit a procedure before a block terminator;
-RETURN with a value is invalid. BYVAL, BYREF, RETURN, and ENDPROCEDURE
-belong here. Calls may precede top-level definitions.
-
-# EXAMPLE
-
-```text
-PROCEDURE Increment(BYREF Value : INTEGER)
-    Value <- Value + 1
-ENDPROCEDURE
-DECLARE Count : INTEGER
-CALL Increment(Count)
-OUTPUT Count
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-call(7)](cpsc-keyword-call.7.md), [cpsc-keyword-function(7)](cpsc-keyword-function.7.md).
-
diff --git a/doc/language/cpsc-keyword-readfile.7.md b/doc/language/cpsc-keyword-readfile.7.md
deleted file mode 100644
index 71cd3db..0000000
--- a/doc/language/cpsc-keyword-readfile.7.md
+++ /dev/null
@@ -1,34 +0,0 @@
-% CPSC-KEYWORD-READFILE(7)
-
-# NAME
-
-cpsc-keyword-readfile - read a line from a text file
-
-# SYNOPSIS
-
-```text
-READFILE filename, variable
-```
-
-# DESCRIPTION
-
-Read one line from a file opened FOR READ, removing the line ending.
-The target must be a plain, previously declared STRING variable.
-Guard reads with EOF; reading past the end terminates execution.
-
-# EXAMPLE
-
-```text
-DECLARE Line : STRING
-OPENFILE "notes.txt" FOR READ
-WHILE NOT EOF("notes.txt") DO
-    READFILE "notes.txt", Line
-    OUTPUT Line
-ENDWHILE
-CLOSEFILE "notes.txt"
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md), [cpsc-function-eof(7)](cpsc-function-eof.7.md).
-
diff --git a/doc/language/cpsc-keyword-repeat.7.md b/doc/language/cpsc-keyword-repeat.7.md
deleted file mode 100644
index 42fdd2d..0000000
--- a/doc/language/cpsc-keyword-repeat.7.md
+++ /dev/null
@@ -1,34 +0,0 @@
-% CPSC-KEYWORD-REPEAT(7)
-
-# NAME
-
-cpsc-keyword-repeat - repeat until a condition is true
-
-# SYNOPSIS
-
-```text
-REPEAT
-    statements
-UNTIL condition
-```
-
-# DESCRIPTION
-
-Test after each iteration, so the body runs at least once.
-Stop when the condition becomes true. UNTIL belongs to this syntax.
-
-# EXAMPLE
-
-```text
-DECLARE Count : INTEGER
-Count <- 0
-REPEAT
-    Count <- Count + 1
-    OUTPUT Count
-UNTIL Count = 3
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-while(7)](cpsc-keyword-while.7.md), [cpsc-keyword-for(7)](cpsc-keyword-for.7.md).
-
diff --git a/doc/language/cpsc-keyword-type.7.md b/doc/language/cpsc-keyword-type.7.md
deleted file mode 100644
index d630403..0000000
--- a/doc/language/cpsc-keyword-type.7.md
+++ /dev/null
@@ -1,53 +0,0 @@
-% CPSC-KEYWORD-TYPE(7)
-
-# NAME
-
-cpsc-keyword-type - define enumerations, pointers, and records
-
-# SYNOPSIS
-
-```text
-TYPE name = (value, ...)
-TYPE name = ^type
-TYPE name
-    DECLARE field : type
-ENDTYPE
-```
-
-# DESCRIPTION
-
-Define types at top level. Enumeration values have globally reserved names;
-OUTPUT prints their zero-based ordinals. Enumerations support comparisons
-with the same type and addition/subtraction of INTEGER offsets; invalid
-ordinals terminate execution.
-
-A prefix caret takes an address (`^variable`); a suffix caret dereferences
-a pointer (`pointer^`). Pointee types must match exactly, even where guide
-section 4.2's example mixes types. Pointers start null; dereferencing null
-terminates execution. There is no NULL literal. Avoid pointers to local
-variables after the function returns.
-
-Records contain one or more DECLARE fields and end with ENDTYPE. Access
-fields with a dot. Whole records copy by value; array fields are unsupported.
-Distinct user-defined type names remain distinct types. SET/DEFINE are
-reserved but unsupported.
-
-# EXAMPLE
-
-```text
-TYPE Point
-    DECLARE X : INTEGER
-    DECLARE Y : INTEGER
-ENDTYPE
-TYPE PointPtr = ^Point
-DECLARE Position : Point
-DECLARE Pointer : PointPtr
-Pointer <- ^Position
-Pointer^.X <- 3
-OUTPUT Position.X
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md), [cpsc-keyword-class(7)](cpsc-keyword-class.7.md).
-
diff --git a/doc/language/cpsc-keyword-while.7.md b/doc/language/cpsc-keyword-while.7.md
deleted file mode 100644
index e6707b4..0000000
--- a/doc/language/cpsc-keyword-while.7.md
+++ /dev/null
@@ -1,34 +0,0 @@
-% CPSC-KEYWORD-WHILE(7)
-
-# NAME
-
-cpsc-keyword-while - repeat while a condition is true
-
-# SYNOPSIS
-
-```text
-WHILE condition DO
-    statements
-ENDWHILE
-```
-
-# DESCRIPTION
-
-Test before each iteration; the body may run zero times.
-DO and ENDWHILE belong to this syntax.
-
-# EXAMPLE
-
-```text
-DECLARE Count : INTEGER
-Count <- 1
-WHILE Count <= 3 DO
-    OUTPUT Count
-    Count <- Count + 1
-ENDWHILE
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-repeat(7)](cpsc-keyword-repeat.7.md), [cpsc-keyword-for(7)](cpsc-keyword-for.7.md).
-
diff --git a/doc/language/cpsc-keyword-writefile.7.md b/doc/language/cpsc-keyword-writefile.7.md
deleted file mode 100644
index a00be5e..0000000
--- a/doc/language/cpsc-keyword-writefile.7.md
+++ /dev/null
@@ -1,30 +0,0 @@
-% CPSC-KEYWORD-WRITEFILE(7)
-
-# NAME
-
-cpsc-keyword-writefile - write a line to a text file
-
-# SYNOPSIS
-
-```text
-WRITEFILE filename, expression
-```
-
-# DESCRIPTION
-
-Write one value as text followed by a newline. Open the file FOR WRITE or
-APPEND first. Exactly one data expression is accepted; join strings with
-`&` when needed. Records, classes, and pointers are unsupported as data.
-
-# EXAMPLE
-
-```text
-OPENFILE "notes.txt" FOR APPEND
-WRITEFILE "notes.txt", "Score: " & NUM_TO_STR(10)
-CLOSEFILE "notes.txt"
-```
-
-# SEE ALSO
-
-[cpsc-language-overview(7)](cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md), [cpsc-function-num_to_str(7)](cpsc-function-num_to_str.7.md).
-
diff --git a/doc/language/cpsc-language-overview.7.md b/doc/language/cpsc-language-overview.7.md
index 8adf362..7005fa0 100644
--- a/doc/language/cpsc-language-overview.7.md
+++ b/doc/language/cpsc-language-overview.7.md
@@ -29,27 +29,27 @@ TYPE for records/enumerations/pointers, and CLASS for public/private fields.
 
 # KEYWORDS
 
-- [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md): declare variables and arrays.
-- [cpsc-keyword-input(7)](cpsc-keyword-input.7.md): read a value from standard input.
-- [cpsc-keyword-output(7)](cpsc-keyword-output.7.md): print values to standard output.
-- [cpsc-keyword-if(7)](cpsc-keyword-if.7.md): choose between branches.
-- [cpsc-keyword-while(7)](cpsc-keyword-while.7.md): repeat while a condition is true.
-- [cpsc-keyword-repeat(7)](cpsc-keyword-repeat.7.md): repeat until a condition is true.
-- [cpsc-keyword-for(7)](cpsc-keyword-for.7.md): iterate over an integer range.
-- [cpsc-keyword-function(7)](cpsc-keyword-function.7.md): define a function that returns a value.
-- [cpsc-keyword-procedure(7)](cpsc-keyword-procedure.7.md): define a procedure and parameter modes.
-- [cpsc-keyword-call(7)](cpsc-keyword-call.7.md): invoke a procedure.
-- [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md): open a text file.
-- [cpsc-keyword-readfile(7)](cpsc-keyword-readfile.7.md): read a line from a text file.
-- [cpsc-keyword-writefile(7)](cpsc-keyword-writefile.7.md): write a line to a text file.
-- [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md): close a text file.
-- [cpsc-keyword-type(7)](cpsc-keyword-type.7.md): define enumerations, pointers, and records.
-- [cpsc-keyword-class(7)](cpsc-keyword-class.7.md): define a class with public and private fields.
-- [cpsc-keyword-and(7)](cpsc-keyword-and.7.md): combine conditions with logical AND.
-- [cpsc-keyword-or(7)](cpsc-keyword-or.7.md): combine conditions with logical OR.
-- [cpsc-keyword-not(7)](cpsc-keyword-not.7.md): negate a condition.
-- [cpsc-keyword-div(7)](cpsc-keyword-div.7.md): perform integer division.
-- [cpsc-keyword-mod(7)](cpsc-keyword-mod.7.md): find the integer division remainder.
+- [cpsc-keyword-declare(7)](keyword/cpsc-keyword-declare.7.md): declare variables and arrays.
+- [cpsc-keyword-input(7)](keyword/cpsc-keyword-input.7.md): read a value from standard input.
+- [cpsc-keyword-output(7)](keyword/cpsc-keyword-output.7.md): print values to standard output.
+- [cpsc-keyword-if(7)](keyword/cpsc-keyword-if.7.md): choose between branches.
+- [cpsc-keyword-while(7)](keyword/cpsc-keyword-while.7.md): repeat while a condition is true.
+- [cpsc-keyword-repeat(7)](keyword/cpsc-keyword-repeat.7.md): repeat until a condition is true.
+- [cpsc-keyword-for(7)](keyword/cpsc-keyword-for.7.md): iterate over an integer range.
+- [cpsc-keyword-function(7)](keyword/cpsc-keyword-function.7.md): define a function that returns a value.
+- [cpsc-keyword-procedure(7)](keyword/cpsc-keyword-procedure.7.md): define a procedure and parameter modes.
+- [cpsc-keyword-call(7)](keyword/cpsc-keyword-call.7.md): invoke a procedure.
+- [cpsc-keyword-openfile(7)](keyword/cpsc-keyword-openfile.7.md): open a text file.
+- [cpsc-keyword-readfile(7)](keyword/cpsc-keyword-readfile.7.md): read a line from a text file.
+- [cpsc-keyword-writefile(7)](keyword/cpsc-keyword-writefile.7.md): write a line to a text file.
+- [cpsc-keyword-closefile(7)](keyword/cpsc-keyword-closefile.7.md): close a text file.
+- [cpsc-keyword-type(7)](keyword/cpsc-keyword-type.7.md): define enumerations, pointers, and records.
+- [cpsc-keyword-class(7)](keyword/cpsc-keyword-class.7.md): define a class with public and private fields.
+- [cpsc-keyword-and(7)](keyword/cpsc-keyword-and.7.md): combine conditions with logical AND.
+- [cpsc-keyword-or(7)](keyword/cpsc-keyword-or.7.md): combine conditions with logical OR.
+- [cpsc-keyword-not(7)](keyword/cpsc-keyword-not.7.md): negate a condition.
+- [cpsc-keyword-div(7)](keyword/cpsc-keyword-div.7.md): perform integer division.
+- [cpsc-keyword-mod(7)](keyword/cpsc-keyword-mod.7.md): find the integer division remainder.
 
 Closing and auxiliary keywords are documented with their main constructs:
 THEN/ELSE/ENDIF with IF; DO/ENDWHILE with WHILE; UNTIL with REPEAT;
@@ -61,18 +61,18 @@ TRUE/FALSE are BOOLEAN literals.
 
 # BUILT-IN FUNCTIONS
 
-- [cpsc-function-length(7)](cpsc-function-length.7.md): find a string's length.
-- [cpsc-function-mid(7)](cpsc-function-mid.7.md): extract part of a string.
-- [cpsc-function-left(7)](cpsc-function-left.7.md): extract the beginning of a string.
-- [cpsc-function-right(7)](cpsc-function-right.7.md): extract the end of a string.
-- [cpsc-function-lcase(7)](cpsc-function-lcase.7.md): convert text to lower case.
-- [cpsc-function-ucase(7)](cpsc-function-ucase.7.md): convert text to upper case.
-- [cpsc-function-asc(7)](cpsc-function-asc.7.md): find a character's byte code.
-- [cpsc-function-chr(7)](cpsc-function-chr.7.md): convert a byte code to text.
-- [cpsc-function-is_num(7)](cpsc-function-is_num.7.md): test whether text represents a number.
-- [cpsc-function-num_to_str(7)](cpsc-function-num_to_str.7.md): convert a number to text.
-- [cpsc-function-str_to_num(7)](cpsc-function-str_to_num.7.md): convert text to a real number.
-- [cpsc-function-eof(7)](cpsc-function-eof.7.md): test for the end of a text file.
+- [cpsc-function-length(7)](function/cpsc-function-length.7.md): find a string's length.
+- [cpsc-function-mid(7)](function/cpsc-function-mid.7.md): extract part of a string.
+- [cpsc-function-left(7)](function/cpsc-function-left.7.md): extract the beginning of a string.
+- [cpsc-function-right(7)](function/cpsc-function-right.7.md): extract the end of a string.
+- [cpsc-function-lcase(7)](function/cpsc-function-lcase.7.md): convert text to lower case.
+- [cpsc-function-ucase(7)](function/cpsc-function-ucase.7.md): convert text to upper case.
+- [cpsc-function-asc(7)](function/cpsc-function-asc.7.md): find a character's byte code.
+- [cpsc-function-chr(7)](function/cpsc-function-chr.7.md): convert a byte code to text.
+- [cpsc-function-is_num(7)](function/cpsc-function-is_num.7.md): test whether text represents a number.
+- [cpsc-function-num_to_str(7)](function/cpsc-function-num_to_str.7.md): convert a number to text.
+- [cpsc-function-str_to_num(7)](function/cpsc-function-str_to_num.7.md): convert text to a real number.
+- [cpsc-function-eof(7)](function/cpsc-function-eof.7.md): test for the end of a text file.
 
 # UNSUPPORTED FEATURES
 
diff --git a/doc/language/function/cpsc-function-asc.7.md b/doc/language/function/cpsc-function-asc.7.md
new file mode 100644
index 0000000..72403a7
--- /dev/null
+++ b/doc/language/function/cpsc-function-asc.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-ASC(7)
+
+# NAME
+
+cpsc-function-asc - find a character's byte code
+
+# SYNOPSIS
+
+```text
+ASC(character : CHAR) RETURNS INTEGER
+ASC(text : STRING) RETURNS INTEGER
+```
+
+# DESCRIPTION
+
+Return the unsigned byte code of the character, or of the first byte of a
+string. Use a nonempty string; for ASCII characters this is the ASCII code.
+
+# EXAMPLE
+
+```text
+OUTPUT ASC('A')
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-chr(7)](cpsc-function-chr.7.md).
+
diff --git a/doc/language/function/cpsc-function-chr.7.md b/doc/language/function/cpsc-function-chr.7.md
new file mode 100644
index 0000000..59b3121
--- /dev/null
+++ b/doc/language/function/cpsc-function-chr.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-CHR(7)
+
+# NAME
+
+cpsc-function-chr - convert a byte code to text
+
+# SYNOPSIS
+
+```text
+CHR(code : INTEGER) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Convert the low eight bits of code to a one-byte string.
+The result is STRING, not CHAR. Use ASCII codes 1 to 127 for
+ordinary text; code 0 produces an empty string.
+
+# EXAMPLE
+
+```text
+OUTPUT CHR(65)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-asc(7)](cpsc-function-asc.7.md).
+
diff --git a/doc/language/function/cpsc-function-eof.7.md b/doc/language/function/cpsc-function-eof.7.md
new file mode 100644
index 0000000..3ab2d31
--- /dev/null
+++ b/doc/language/function/cpsc-function-eof.7.md
@@ -0,0 +1,34 @@
+% CPSC-FUNCTION-EOF(7)
+
+# NAME
+
+cpsc-function-eof - test for the end of a text file
+
+# SYNOPSIS
+
+```text
+EOF(filename : STRING) RETURNS BOOLEAN
+```
+
+# DESCRIPTION
+
+Return true when no further characters remain in a file opened FOR READ.
+The test does not consume the next character. Testing an unopened file or
+a file in the wrong mode terminates execution.
+
+# EXAMPLE
+
+```text
+DECLARE Line : STRING
+OPENFILE "notes.txt" FOR READ
+WHILE NOT EOF("notes.txt") DO
+    READFILE "notes.txt", Line
+    OUTPUT Line
+ENDWHILE
+CLOSEFILE "notes.txt"
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](../keyword/cpsc-keyword-openfile.7.md), [cpsc-keyword-readfile(7)](../keyword/cpsc-keyword-readfile.7.md), [cpsc-keyword-closefile(7)](../keyword/cpsc-keyword-closefile.7.md).
+
diff --git a/doc/language/function/cpsc-function-is_num.7.md b/doc/language/function/cpsc-function-is_num.7.md
new file mode 100644
index 0000000..a85acfe
--- /dev/null
+++ b/doc/language/function/cpsc-function-is_num.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-IS_NUM(7)
+
+# NAME
+
+cpsc-function-is_num - test whether text represents a number
+
+# SYNOPSIS
+
+```text
+IS_NUM(text : STRING) RETURNS BOOLEAN
+```
+
+# DESCRIPTION
+
+Return true for a nonempty string fully consumed by the runtime's
+numeric conversion. Leading whitespace is accepted; trailing whitespace
+or other trailing text is rejected.
+
+# EXAMPLE
+
+```text
+OUTPUT IS_NUM("12.5")
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-str_to_num(7)](cpsc-function-str_to_num.7.md).
+
diff --git a/doc/language/function/cpsc-function-lcase.7.md b/doc/language/function/cpsc-function-lcase.7.md
new file mode 100644
index 0000000..c8c7db9
--- /dev/null
+++ b/doc/language/function/cpsc-function-lcase.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-LCASE(7)
+
+# NAME
+
+cpsc-function-lcase - convert text to lower case
+
+# SYNOPSIS
+
+```text
+LCASE(text : STRING) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Return a copy with letters converted to lower case. Unlike guide section 5.5's
+CHAR-to-CHAR signature, cpsc accepts text and returns STRING. Use ASCII
+text for predictable character conversion.
+
+# EXAMPLE
+
+```text
+OUTPUT LCASE("HELLO")
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-ucase(7)](cpsc-function-ucase.7.md).
+
diff --git a/doc/language/function/cpsc-function-left.7.md b/doc/language/function/cpsc-function-left.7.md
new file mode 100644
index 0000000..38a703e
--- /dev/null
+++ b/doc/language/function/cpsc-function-left.7.md
@@ -0,0 +1,27 @@
+% CPSC-FUNCTION-LEFT(7)
+
+# NAME
+
+cpsc-function-left - extract the beginning of a string
+
+# SYNOPSIS
+
+```text
+LEFT(text : STRING, count : INTEGER) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Return up to count bytes from the beginning. Counts larger than the string
+length return the whole string; negative counts return an empty string.
+
+# EXAMPLE
+
+```text
+OUTPUT LEFT("Hello", 2)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-right(7)](cpsc-function-right.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md).
+
diff --git a/doc/language/function/cpsc-function-length.7.md b/doc/language/function/cpsc-function-length.7.md
new file mode 100644
index 0000000..9730798
--- /dev/null
+++ b/doc/language/function/cpsc-function-length.7.md
@@ -0,0 +1,27 @@
+% CPSC-FUNCTION-LENGTH(7)
+
+# NAME
+
+cpsc-function-length - find a string's length
+
+# SYNOPSIS
+
+```text
+LENGTH(text : STRING) RETURNS INTEGER
+```
+
+# DESCRIPTION
+
+Return the number of bytes before the string terminator. String operations
+are byte-based, so this is not a Unicode character count.
+
+# EXAMPLE
+
+```text
+OUTPUT LENGTH("Hello")
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-right(7)](cpsc-function-right.7.md).
+
diff --git a/doc/language/function/cpsc-function-mid.7.md b/doc/language/function/cpsc-function-mid.7.md
new file mode 100644
index 0000000..66f7294
--- /dev/null
+++ b/doc/language/function/cpsc-function-mid.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-MID(7)
+
+# NAME
+
+cpsc-function-mid - extract part of a string
+
+# SYNOPSIS
+
+```text
+MID(text : STRING, start : INTEGER, count : INTEGER) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Return up to count bytes starting at the one-based position start.
+Positions below 1 clamp to 1; positions beyond the end return an empty string.
+The count clamps to the available bytes; negative counts return an empty string.
+
+# EXAMPLE
+
+```text
+OUTPUT MID("ABCDEFGH", 2, 3)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-right(7)](cpsc-function-right.7.md), [cpsc-function-length(7)](cpsc-function-length.7.md).
+
diff --git a/doc/language/function/cpsc-function-num_to_str.7.md b/doc/language/function/cpsc-function-num_to_str.7.md
new file mode 100644
index 0000000..fb4f6fc
--- /dev/null
+++ b/doc/language/function/cpsc-function-num_to_str.7.md
@@ -0,0 +1,27 @@
+% CPSC-FUNCTION-NUM_TO_STR(7)
+
+# NAME
+
+cpsc-function-num_to_str - convert a number to text
+
+# SYNOPSIS
+
+```text
+NUM_TO_STR(number : INTEGER or REAL) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Format INTEGER as signed decimal text and REAL with six digits after the
+decimal point.
+
+# EXAMPLE
+
+```text
+OUTPUT NUM_TO_STR(42), " ", NUM_TO_STR(3.5)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-str_to_num(7)](cpsc-function-str_to_num.7.md).
+
diff --git a/doc/language/function/cpsc-function-right.7.md b/doc/language/function/cpsc-function-right.7.md
new file mode 100644
index 0000000..9aa10e6
--- /dev/null
+++ b/doc/language/function/cpsc-function-right.7.md
@@ -0,0 +1,27 @@
+% CPSC-FUNCTION-RIGHT(7)
+
+# NAME
+
+cpsc-function-right - extract the end of a string
+
+# SYNOPSIS
+
+```text
+RIGHT(text : STRING, count : INTEGER) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Return up to count bytes from the end. Use a nonnegative count.
+Counts larger than the string length return the whole string.
+
+# EXAMPLE
+
+```text
+OUTPUT RIGHT("Hello", 2)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-left(7)](cpsc-function-left.7.md), [cpsc-function-mid(7)](cpsc-function-mid.7.md).
+
diff --git a/doc/language/function/cpsc-function-str_to_num.7.md b/doc/language/function/cpsc-function-str_to_num.7.md
new file mode 100644
index 0000000..341b757
--- /dev/null
+++ b/doc/language/function/cpsc-function-str_to_num.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-STR_TO_NUM(7)
+
+# NAME
+
+cpsc-function-str_to_num - convert text to a real number
+
+# SYNOPSIS
+
+```text
+STR_TO_NUM(text : STRING) RETURNS REAL
+```
+
+# DESCRIPTION
+
+Return REAL, including for integer-looking text. Conversion can stop at
+trailing text; invalid text returns zero. Use IS_NUM first when the whole
+string must be a valid number.
+
+# EXAMPLE
+
+```text
+OUTPUT STR_TO_NUM("12.5")
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-is_num(7)](cpsc-function-is_num.7.md), [cpsc-function-num_to_str(7)](cpsc-function-num_to_str.7.md).
+
diff --git a/doc/language/function/cpsc-function-ucase.7.md b/doc/language/function/cpsc-function-ucase.7.md
new file mode 100644
index 0000000..6356f48
--- /dev/null
+++ b/doc/language/function/cpsc-function-ucase.7.md
@@ -0,0 +1,28 @@
+% CPSC-FUNCTION-UCASE(7)
+
+# NAME
+
+cpsc-function-ucase - convert text to upper case
+
+# SYNOPSIS
+
+```text
+UCASE(text : STRING) RETURNS STRING
+```
+
+# DESCRIPTION
+
+Return a copy with letters converted to upper case. Unlike guide section 5.5's
+CHAR-to-CHAR signature, cpsc accepts text and returns STRING. Use ASCII
+text for predictable character conversion.
+
+# EXAMPLE
+
+```text
+OUTPUT UCASE("Hello")
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-function-lcase(7)](cpsc-function-lcase.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-and.7.md b/doc/language/keyword/cpsc-keyword-and.7.md
new file mode 100644
index 0000000..8df8c56
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-and.7.md
@@ -0,0 +1,28 @@
+% CPSC-KEYWORD-AND(7)
+
+# NAME
+
+cpsc-keyword-and - combine conditions with logical AND
+
+# SYNOPSIS
+
+```text
+left AND right
+```
+
+# DESCRIPTION
+
+Return BOOLEAN: true when both operands are true. Both operands are
+evaluated; AND does not short-circuit. AND binds more tightly than OR
+and less tightly than comparisons. Use parentheses for clarity.
+
+# EXAMPLE
+
+```text
+OUTPUT (3 > 2) AND (4 > 1)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-or(7)](cpsc-keyword-or.7.md), [cpsc-keyword-not(7)](cpsc-keyword-not.7.md), [cpsc-keyword-if(7)](cpsc-keyword-if.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-call.7.md b/doc/language/keyword/cpsc-keyword-call.7.md
new file mode 100644
index 0000000..e999a8b
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-call.7.md
@@ -0,0 +1,31 @@
+% CPSC-KEYWORD-CALL(7)
+
+# NAME
+
+cpsc-keyword-call - invoke a procedure
+
+# SYNOPSIS
+
+```text
+CALL name(arguments)
+```
+
+# DESCRIPTION
+
+Invoke a previously declared procedure with its parameters. Empty argument
+lists may be written `CALL name()` or `CALL name`.
+Use function calls in expressions to obtain their results.
+
+# EXAMPLE
+
+```text
+PROCEDURE Hello()
+    OUTPUT "Hello"
+ENDPROCEDURE
+CALL Hello()
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-procedure(7)](cpsc-keyword-procedure.7.md), [cpsc-keyword-function(7)](cpsc-keyword-function.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-class.7.md b/doc/language/keyword/cpsc-keyword-class.7.md
new file mode 100644
index 0000000..d7ec12f
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-class.7.md
@@ -0,0 +1,43 @@
+% CPSC-KEYWORD-CLASS(7)
+
+# NAME
+
+cpsc-keyword-class - define a class with public and private fields
+
+# SYNOPSIS
+
+```text
+CLASS name
+    PUBLIC field : type
+    PRIVATE field : type
+ENDCLASS
+```
+
+# DESCRIPTION
+
+Declare a class at top level with at least one field. Every field explicitly
+requires PUBLIC or PRIVATE, without DECLARE. This differs from guide
+section 10's default-public rule. ENDCLASS closes the declaration.
+
+Classes use record value semantics: zero initialization, whole-value copying,
+arrays, pointers, and ordinary function/procedure parameters. Only PUBLIC
+fields can be accessed externally. PRIVATE fields still initialize and copy
+with the whole value. Methods, constructors, destructors, NEW, INHERITS,
+and array fields are unsupported.
+
+# EXAMPLE
+
+```text
+CLASS Person
+    PUBLIC Name : STRING
+    PRIVATE Age : INTEGER
+ENDCLASS
+DECLARE PersonValue : Person
+PersonValue.Name <- "Alice"
+OUTPUT PersonValue.Name
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-type(7)](cpsc-keyword-type.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-closefile.7.md b/doc/language/keyword/cpsc-keyword-closefile.7.md
new file mode 100644
index 0000000..381ae56
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-closefile.7.md
@@ -0,0 +1,29 @@
+% CPSC-KEYWORD-CLOSEFILE(7)
+
+# NAME
+
+cpsc-keyword-closefile - close a text file
+
+# SYNOPSIS
+
+```text
+CLOSEFILE filename
+```
+
+# DESCRIPTION
+
+Close the file associated with this filename string and release its open-file
+slot. Closing a filename that is not open terminates execution.
+
+# EXAMPLE
+
+```text
+OPENFILE "notes.txt" FOR WRITE
+WRITEFILE "notes.txt", "Done"
+CLOSEFILE "notes.txt"
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-readfile(7)](cpsc-keyword-readfile.7.md), [cpsc-keyword-writefile(7)](cpsc-keyword-writefile.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-declare.7.md b/doc/language/keyword/cpsc-keyword-declare.7.md
new file mode 100644
index 0000000..7fe1cf6
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-declare.7.md
@@ -0,0 +1,40 @@
+% CPSC-KEYWORD-DECLARE(7)
+
+# NAME
+
+cpsc-keyword-declare - declare variables and arrays
+
+# SYNOPSIS
+
+```text
+DECLARE name : type
+DECLARE name : ARRAY[lower:upper, ...] OF type
+```
+
+# DESCRIPTION
+
+Declare one variable per statement. Built-in types are INTEGER (signed 64-bit),
+REAL, BOOLEAN, CHAR (one byte), and STRING. User-defined TYPE and CLASS names
+are also accepted. Variables start with zero, FALSE, an empty string, or a
+zero-initialized user-defined value.
+
+ARRAY bounds are inclusive and may be expressions; multiple ranges create
+multiple dimensions. Access elements with `name[index, ...]`. Bounds are
+checked at run time. Whole-array assignment is unsupported. Declare arrays
+before using them; arrays declared inside a control-flow block stay in that
+block.
+
+# EXAMPLE
+
+```text
+DECLARE Count : INTEGER
+DECLARE Names : ARRAY[1:3] OF STRING
+Count <- 2
+Names[Count] <- "Alice"
+OUTPUT Names[Count]
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-type(7)](cpsc-keyword-type.7.md), [cpsc-keyword-class(7)](cpsc-keyword-class.7.md), [cpsc-keyword-output(7)](cpsc-keyword-output.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-div.7.md b/doc/language/keyword/cpsc-keyword-div.7.md
new file mode 100644
index 0000000..6adb23d
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-div.7.md
@@ -0,0 +1,28 @@
+% CPSC-KEYWORD-DIV(7)
+
+# NAME
+
+cpsc-keyword-div - perform integer division
+
+# SYNOPSIS
+
+```text
+left DIV right
+```
+
+# DESCRIPTION
+
+Both operands must be INTEGER. Return the quotient truncated toward zero.
+A zero divisor terminates execution. DIV has the same precedence as
+multiplication. Use `/` for division returning REAL.
+
+# EXAMPLE
+
+```text
+OUTPUT 7 DIV 2
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-mod(7)](cpsc-keyword-mod.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-for.7.md b/doc/language/keyword/cpsc-keyword-for.7.md
new file mode 100644
index 0000000..57b5632
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-for.7.md
@@ -0,0 +1,35 @@
+% CPSC-KEYWORD-FOR(7)
+
+# NAME
+
+cpsc-keyword-for - iterate over an integer range
+
+# SYNOPSIS
+
+```text
+FOR variable <- start TO finish [STEP increment]
+    statements
+NEXT variable
+```
+
+# DESCRIPTION
+
+The loop variable must already be declared INTEGER. Both endpoints are
+inclusive. STEP defaults to 1; use a negative value to count down.
+STEP is evaluated once, while the finish expression is evaluated each
+iteration. NEXT must name the same variable. Use a nonzero STEP.
+TO, STEP, and NEXT belong to this syntax.
+
+# EXAMPLE
+
+```text
+DECLARE Index : INTEGER
+FOR Index <- 3 TO 1 STEP -1
+    OUTPUT Index
+NEXT Index
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md), [cpsc-keyword-while(7)](cpsc-keyword-while.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-function.7.md b/doc/language/keyword/cpsc-keyword-function.7.md
new file mode 100644
index 0000000..d687ba9
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-function.7.md
@@ -0,0 +1,41 @@
+% CPSC-KEYWORD-FUNCTION(7)
+
+# NAME
+
+cpsc-keyword-function - define a function that returns a value
+
+# SYNOPSIS
+
+```text
+FUNCTION name(parameters) RETURNS type
+    statements
+    RETURN expression
+ENDFUNCTION
+```
+
+# DESCRIPTION
+
+Call a function in an expression as `name(arguments)`. A call may precede its
+top-level definition. RETURNS specifies the result type; omitting it defaults
+to INTEGER. RETURN supplies a value of that type. Whole-array results are
+unsupported.
+
+Parameters use `name : type`, optionally prefixed by BYVAL. BYVAL is the
+default; BYREF is forbidden for functions (guide section 8.3).
+Array parameters accept `ARRAY OF type` (one dimension) or
+`ARRAY[lower:upper, ...] OF type` (integer literal bounds).
+BYVAL arrays are copied. RETURNS, RETURN, BYVAL, and ENDFUNCTION belong here.
+
+# EXAMPLE
+
+```text
+FUNCTION Double(Value : INTEGER) RETURNS INTEGER
+    RETURN Value * 2
+ENDFUNCTION
+OUTPUT Double(4)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-procedure(7)](cpsc-keyword-procedure.7.md), [cpsc-keyword-call(7)](cpsc-keyword-call.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-if.7.md b/doc/language/keyword/cpsc-keyword-if.7.md
new file mode 100644
index 0000000..a934922
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-if.7.md
@@ -0,0 +1,35 @@
+% CPSC-KEYWORD-IF(7)
+
+# NAME
+
+cpsc-keyword-if - choose between branches
+
+# SYNOPSIS
+
+```text
+IF condition THEN
+    statements
+ELSE
+    statements
+ENDIF
+```
+
+# DESCRIPTION
+
+Execute the THEN branch when the condition is true, otherwise the optional
+ELSE branch. Blocks may be nested. THEN, ELSE, and ENDIF belong to this syntax.
+
+# EXAMPLE
+
+```text
+IF 3 > 2 THEN
+    OUTPUT "yes"
+ELSE
+    OUTPUT "no"
+ENDIF
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-and(7)](cpsc-keyword-and.7.md), [cpsc-keyword-or(7)](cpsc-keyword-or.7.md), [cpsc-keyword-not(7)](cpsc-keyword-not.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-input.7.md b/doc/language/keyword/cpsc-keyword-input.7.md
new file mode 100644
index 0000000..c14fac1
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-input.7.md
@@ -0,0 +1,31 @@
+% CPSC-KEYWORD-INPUT(7)
+
+# NAME
+
+cpsc-keyword-input - read a value from standard input
+
+# SYNOPSIS
+
+```text
+INPUT variable
+```
+
+# DESCRIPTION
+
+Read into a previously declared INTEGER, REAL, BOOLEAN, CHAR, or STRING
+variable. STRING input reads one whitespace-delimited word. The target must
+be a plain variable; array elements and record/class fields are unsupported,
+unlike the wider INPUT syntax in guide section 5.1.
+
+# EXAMPLE
+
+```text
+DECLARE Name : STRING
+INPUT Name
+OUTPUT Name
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md), [cpsc-keyword-output(7)](cpsc-keyword-output.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-mod.7.md b/doc/language/keyword/cpsc-keyword-mod.7.md
new file mode 100644
index 0000000..2eceeb5
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-mod.7.md
@@ -0,0 +1,29 @@
+% CPSC-KEYWORD-MOD(7)
+
+# NAME
+
+cpsc-keyword-mod - find the integer division remainder
+
+# SYNOPSIS
+
+```text
+left MOD right
+```
+
+# DESCRIPTION
+
+Both operands must be INTEGER. Return the remainder after division truncated
+toward zero; a nonzero remainder has the dividend's sign.
+A zero divisor terminates execution. MOD has the same precedence as
+multiplication.
+
+# EXAMPLE
+
+```text
+OUTPUT 7 MOD 2
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-div(7)](cpsc-keyword-div.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-not.7.md b/doc/language/keyword/cpsc-keyword-not.7.md
new file mode 100644
index 0000000..0ada425
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-not.7.md
@@ -0,0 +1,27 @@
+% CPSC-KEYWORD-NOT(7)
+
+# NAME
+
+cpsc-keyword-not - negate a condition
+
+# SYNOPSIS
+
+```text
+NOT expression
+```
+
+# DESCRIPTION
+
+Return BOOLEAN with the opposite truth value. NOT is a unary operator;
+parenthesize comparisons, for example `NOT (Count = 0)`.
+
+# EXAMPLE
+
+```text
+OUTPUT NOT (3 = 2)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-and(7)](cpsc-keyword-and.7.md), [cpsc-keyword-or(7)](cpsc-keyword-or.7.md), [cpsc-keyword-if(7)](cpsc-keyword-if.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-openfile.7.md b/doc/language/keyword/cpsc-keyword-openfile.7.md
new file mode 100644
index 0000000..2aa2b44
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-openfile.7.md
@@ -0,0 +1,37 @@
+% CPSC-KEYWORD-OPENFILE(7)
+
+# NAME
+
+cpsc-keyword-openfile - open a text file
+
+# SYNOPSIS
+
+```text
+OPENFILE filename FOR READ
+OPENFILE filename FOR WRITE
+OPENFILE filename FOR APPEND
+```
+
+# DESCRIPTION
+
+The filename is a STRING expression. READ opens an existing file for reading;
+WRITE creates or truncates a file; APPEND writes at the end, creating the file
+if needed. READ, WRITE, APPEND, and this use of FOR belong here.
+
+At most 16 files may be open at once. Use the same filename string for
+subsequent operations. Reopening an open filename, failed opens, and wrong-mode
+operations terminate execution with a fatal diagnostic. RANDOM is reserved
+but unsupported.
+
+# EXAMPLE
+
+```text
+OPENFILE "notes.txt" FOR WRITE
+WRITEFILE "notes.txt", "Hello"
+CLOSEFILE "notes.txt"
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-readfile(7)](cpsc-keyword-readfile.7.md), [cpsc-keyword-writefile(7)](cpsc-keyword-writefile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-or.7.md b/doc/language/keyword/cpsc-keyword-or.7.md
new file mode 100644
index 0000000..4594215
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-or.7.md
@@ -0,0 +1,28 @@
+% CPSC-KEYWORD-OR(7)
+
+# NAME
+
+cpsc-keyword-or - combine conditions with logical OR
+
+# SYNOPSIS
+
+```text
+left OR right
+```
+
+# DESCRIPTION
+
+Return BOOLEAN: true when either operand is true. Both operands are
+evaluated; OR does not short-circuit. OR binds less tightly than AND
+and comparisons.
+
+# EXAMPLE
+
+```text
+OUTPUT (3 < 2) OR (4 > 1)
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-and(7)](cpsc-keyword-and.7.md), [cpsc-keyword-not(7)](cpsc-keyword-not.7.md), [cpsc-keyword-if(7)](cpsc-keyword-if.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-output.7.md b/doc/language/keyword/cpsc-keyword-output.7.md
new file mode 100644
index 0000000..a1c2d2a
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-output.7.md
@@ -0,0 +1,32 @@
+% CPSC-KEYWORD-OUTPUT(7)
+
+# NAME
+
+cpsc-keyword-output - print values to standard output
+
+# SYNOPSIS
+
+```text
+OUTPUT expression, ...
+```
+
+# DESCRIPTION
+
+Print expressions from left to right without automatic separators, then add
+a newline. Strings print their contents; BOOLEAN prints TRUE or FALSE.
+Whole arrays and partially indexed arrays print their elements one per line;
+a final array adds no extra newline. Records, classes, and pointers cannot
+be printed directly.
+
+# EXAMPLE
+
+```text
+DECLARE Score : INTEGER
+Score <- 10
+OUTPUT "Score: ", Score
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-input(7)](cpsc-keyword-input.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-procedure.7.md b/doc/language/keyword/cpsc-keyword-procedure.7.md
new file mode 100644
index 0000000..d8be9f4
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-procedure.7.md
@@ -0,0 +1,43 @@
+% CPSC-KEYWORD-PROCEDURE(7)
+
+# NAME
+
+cpsc-keyword-procedure - define a procedure and parameter modes
+
+# SYNOPSIS
+
+```text
+PROCEDURE name(parameters)
+    statements
+ENDPROCEDURE
+```
+
+# DESCRIPTION
+
+Invoke with CALL. Parameters use `name : type`, optionally prefixed by
+BYVAL or BYREF. The default is BYVAL (copy); BYREF modifies the caller's
+variable and requires an exact type match. Scalar BYREF arguments must be
+plain variables. A mode remains in effect for following parameters until
+another mode is specified.
+
+Arrays accept `ARRAY OF type` or `ARRAY[lower:upper, ...] OF type`;
+explicit bounds must be integer literals. BYVAL copies the array; BYREF
+shares it. Bare RETURN can exit a procedure before a block terminator;
+RETURN with a value is invalid. BYVAL, BYREF, RETURN, and ENDPROCEDURE
+belong here. Calls may precede top-level definitions.
+
+# EXAMPLE
+
+```text
+PROCEDURE Increment(BYREF Value : INTEGER)
+    Value <- Value + 1
+ENDPROCEDURE
+DECLARE Count : INTEGER
+CALL Increment(Count)
+OUTPUT Count
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-call(7)](cpsc-keyword-call.7.md), [cpsc-keyword-function(7)](cpsc-keyword-function.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-readfile.7.md b/doc/language/keyword/cpsc-keyword-readfile.7.md
new file mode 100644
index 0000000..8260dd2
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-readfile.7.md
@@ -0,0 +1,34 @@
+% CPSC-KEYWORD-READFILE(7)
+
+# NAME
+
+cpsc-keyword-readfile - read a line from a text file
+
+# SYNOPSIS
+
+```text
+READFILE filename, variable
+```
+
+# DESCRIPTION
+
+Read one line from a file opened FOR READ, removing the line ending.
+The target must be a plain, previously declared STRING variable.
+Guard reads with EOF; reading past the end terminates execution.
+
+# EXAMPLE
+
+```text
+DECLARE Line : STRING
+OPENFILE "notes.txt" FOR READ
+WHILE NOT EOF("notes.txt") DO
+    READFILE "notes.txt", Line
+    OUTPUT Line
+ENDWHILE
+CLOSEFILE "notes.txt"
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md), [cpsc-function-eof(7)](../function/cpsc-function-eof.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-repeat.7.md b/doc/language/keyword/cpsc-keyword-repeat.7.md
new file mode 100644
index 0000000..b1a73c2
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-repeat.7.md
@@ -0,0 +1,34 @@
+% CPSC-KEYWORD-REPEAT(7)
+
+# NAME
+
+cpsc-keyword-repeat - repeat until a condition is true
+
+# SYNOPSIS
+
+```text
+REPEAT
+    statements
+UNTIL condition
+```
+
+# DESCRIPTION
+
+Test after each iteration, so the body runs at least once.
+Stop when the condition becomes true. UNTIL belongs to this syntax.
+
+# EXAMPLE
+
+```text
+DECLARE Count : INTEGER
+Count <- 0
+REPEAT
+    Count <- Count + 1
+    OUTPUT Count
+UNTIL Count = 3
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-while(7)](cpsc-keyword-while.7.md), [cpsc-keyword-for(7)](cpsc-keyword-for.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-type.7.md b/doc/language/keyword/cpsc-keyword-type.7.md
new file mode 100644
index 0000000..9dd4c73
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-type.7.md
@@ -0,0 +1,53 @@
+% CPSC-KEYWORD-TYPE(7)
+
+# NAME
+
+cpsc-keyword-type - define enumerations, pointers, and records
+
+# SYNOPSIS
+
+```text
+TYPE name = (value, ...)
+TYPE name = ^type
+TYPE name
+    DECLARE field : type
+ENDTYPE
+```
+
+# DESCRIPTION
+
+Define types at top level. Enumeration values have globally reserved names;
+OUTPUT prints their zero-based ordinals. Enumerations support comparisons
+with the same type and addition/subtraction of INTEGER offsets; invalid
+ordinals terminate execution.
+
+A prefix caret takes an address (`^variable`); a suffix caret dereferences
+a pointer (`pointer^`). Pointee types must match exactly, even where guide
+section 4.2's example mixes types. Pointers start null; dereferencing null
+terminates execution. There is no NULL literal. Avoid pointers to local
+variables after the function returns.
+
+Records contain one or more DECLARE fields and end with ENDTYPE. Access
+fields with a dot. Whole records copy by value; array fields are unsupported.
+Distinct user-defined type names remain distinct types. SET/DEFINE are
+reserved but unsupported.
+
+# EXAMPLE
+
+```text
+TYPE Point
+    DECLARE X : INTEGER
+    DECLARE Y : INTEGER
+ENDTYPE
+TYPE PointPtr = ^Point
+DECLARE Position : Point
+DECLARE Pointer : PointPtr
+Pointer <- ^Position
+Pointer^.X <- 3
+OUTPUT Position.X
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-declare(7)](cpsc-keyword-declare.7.md), [cpsc-keyword-class(7)](cpsc-keyword-class.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-while.7.md b/doc/language/keyword/cpsc-keyword-while.7.md
new file mode 100644
index 0000000..c6d8721
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-while.7.md
@@ -0,0 +1,34 @@
+% CPSC-KEYWORD-WHILE(7)
+
+# NAME
+
+cpsc-keyword-while - repeat while a condition is true
+
+# SYNOPSIS
+
+```text
+WHILE condition DO
+    statements
+ENDWHILE
+```
+
+# DESCRIPTION
+
+Test before each iteration; the body may run zero times.
+DO and ENDWHILE belong to this syntax.
+
+# EXAMPLE
+
+```text
+DECLARE Count : INTEGER
+Count <- 1
+WHILE Count <= 3 DO
+    OUTPUT Count
+    Count <- Count + 1
+ENDWHILE
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-repeat(7)](cpsc-keyword-repeat.7.md), [cpsc-keyword-for(7)](cpsc-keyword-for.7.md).
+
diff --git a/doc/language/keyword/cpsc-keyword-writefile.7.md b/doc/language/keyword/cpsc-keyword-writefile.7.md
new file mode 100644
index 0000000..caeafe7
--- /dev/null
+++ b/doc/language/keyword/cpsc-keyword-writefile.7.md
@@ -0,0 +1,30 @@
+% CPSC-KEYWORD-WRITEFILE(7)
+
+# NAME
+
+cpsc-keyword-writefile - write a line to a text file
+
+# SYNOPSIS
+
+```text
+WRITEFILE filename, expression
+```
+
+# DESCRIPTION
+
+Write one value as text followed by a newline. Open the file FOR WRITE or
+APPEND first. Exactly one data expression is accepted; join strings with
+`&` when needed. Records, classes, and pointers are unsupported as data.
+
+# EXAMPLE
+
+```text
+OPENFILE "notes.txt" FOR APPEND
+WRITEFILE "notes.txt", "Score: " & NUM_TO_STR(10)
+CLOSEFILE "notes.txt"
+```
+
+# SEE ALSO
+
+[cpsc-language-overview(7)](../cpsc-language-overview.7.md), [cpsc-keyword-openfile(7)](cpsc-keyword-openfile.7.md), [cpsc-keyword-closefile(7)](cpsc-keyword-closefile.7.md), [cpsc-function-num_to_str(7)](../function/cpsc-function-num_to_str.7.md).
+
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