core/config: document default truncate_token everywhere

src/plyngent/agent/directive_checkpoint.py

@@ -22,7 +22,7 @@ use `run_argv_batch` for ordered pipelines.
 - `edit_replace`: fix match / `max_replaces`; `edit_lineno` edits only lines read via \
 `read_file(with_lineno=true)`, and line numbers reset after any file write.
 - `read_file` results start with `L{begin}-{end}` (1-based lines; offset is 0-based).
-- Truncated results carry a `TRUNCATE_TOKEN`; continue with `get_truncated`.
+- Truncated results carry a `truncate_token=...`; continue with `get_truncated`.
 - Prefer `fetch` for HTTP(S); private/LAN hosts need human policy allow (not YOLO).
 - PTY secrets only via `ask_into_pty`; denylists and confirms still apply.
 - `wait` pauses; pressing Enter disturbs early (optional reason).

src/plyngent/config/models.py

@@ -34,8 +34,8 @@ re-read with line numbers after any `edit_*` / `write_file` / copy/move/delete,
 since line numbers go stale.
 - `read_file` results start with a 1-based line range `L{begin}-{end}` (`offset` \
 is 0-based); `with_lineno` shows per-line numbers instead.
-- Truncated `read_file` / `fetch` results carry a `TRUNCATE_TOKEN`; use \
-`get_truncated` with it to keep reading (chains through truncations).
+- Truncated results (any tool) carry a `truncate_token=...`; use `get_truncated` \
+with it to keep reading (chains through truncations).
 
 ### Commands
 - Prefer `run_argv` / `run_argv_batch` (argv lists, no shell) over `bash -c` or similar.