Updated AGENTS file with redirections options

AGENTS.md

@@ -3,6 +3,7 @@
 ## Project Structure & Module Organization
 - `src/` holds the shell implementation, with submodules for `builtins/`, `executor/`, `parser/`, and `variables/`.
 - `src/builtins/` currently includes: `cd`, `echo`, `env`, `exit`, `export`, `pwd`, `unset`.
+- `src/executor/` includes pipeline/process orchestration plus file redirections in `redirections.c`.
 - `include/` contains public headers used across modules.
 - `lib/` is populated at build time with third-party 42 libraries (libft, get_next_line, ft_printf, ft_args).
 - `docs/` stores project references and manual test notes (see `docs/tests.md`).
@@ -25,22 +26,25 @@
 
 ## Parser & Lexer Functionality (Current `src/parser`)
 - Runtime entrypoint is `parse(line, minishell)` from `src/minishell.c` (`readline -> parse -> execute`).
-- `parse` splits the input line by unquoted `|` using `extract_next_command` + `find_boundary`.
+- `parse` calls `lex(line)` and then converts token lists to `t_command` nodes with `parse_tokens`.
-- Each non-empty segment is trimmed and converted into a `t_command` via `cmdnew`.
+- `command_new` builds one command from tokens up to `TOKEN_PIPE`.
-- `set_argv` splits by unquoted spaces; quote characters are preserved in the resulting argument text.
+- `words_add` stores consecutive `TOKEN_WORD` tokens in `command->argv` and increments `argc`.
 - `expand_envs` is currently a TODO (no `$VAR` expansion is applied in parser stage).
-- Redirections/heredoc are not converted into `t_command.redirections` yet in `src/parser/parser.c`.
+- Redirection tokens are converted into `t_redirection` and stored in `t_command.redirections`; heredocs are stored in `t_command.heredocs`.
-- `set_path` resolves builtins and direct paths (`/`, `./`, `../`), otherwise searches `PATH` with `access(..., F_OK)`.
+- Path resolution is handled in executor (`executor_resolve_command_path`) before `execve`.
 - `src/parser/lexer.c` provides a separate lexer (`lex`) that tokenizes into `TOKEN_WORD`, `TOKEN_PIPE`, `TOKEN_REDIRECT_IN`, `TOKEN_REDIRECT_OUT`, `TOKEN_APPEND`, and `TOKEN_HEREDOC`.
 - The lexer tracks single/double quote context so metacharacters inside quotes remain part of words.
 - Meta runs are read as contiguous chunks in `read_token` (for example, repeated `|`/`<`/`>` are captured as one token value).
-- Current parser flow does not consume the lexer output yet.
+- Current parser flow consumes lexer output directly.
+
+## Executor Redirections (Current `src/executor`)
+- File redirections are applied in `src/executor/redirections.c` via `open` + `dup2` before command execution.
+- Supported file redirections: input `<`, output truncate `>`, output append `>>`.
+- Redirections are applied for both forked commands (child path) and single builtins executed in parent.
+- Parent-builtin redirections save/restore `STDIN_FILENO` and `STDOUT_FILENO` after builtin execution.
 
 ## Parser & Lexer Known Gaps
-- `src/parser/parser.c` currently calls `tokenize()` with no valid declaration/definition in that unit, causing a build error with `-Werror`.
+- Heredoc tokens are parsed and stored, but runtime heredoc execution/input feeding is still pending in executor.
-- `src/parser/parser.c` writes `command->infile` and `command->outfile`, but those fields are not present in `t_command` (`include/core.h`), causing build errors.
-- `src/parser/parser.c` keeps a `tokens` variable that is unused, also failing under `-Werror`.
-- `include/parser.h` exports `parse` only; `lex` is not declared in public headers.
 - No explicit unmatched-quote syntax error handling is implemented in parser/lexer path.
 
 ## Testing Guidelines