fixed logging and remove

docs/cli.md

@@ -317,11 +317,13 @@ Options:
 - `--format=pretty|bare|json` — output format (default: `pretty` for console, `json` for file)
 - `--channels=ch1,ch2` — channels to subscribe (default: `console,error,system`). Use `'*'` for all channels (quote to prevent shell glob expansion).
 - `--exclude=ch1,ch2` — channels to exclude (useful with `'*'`)
+- `--stack=ch1,ch2` — channels that capture a full stack trace (default: `error`)
 
 ```bash
 pit log add terminal console --format=bare --channels=console
 pit log add errors file .cell/logs/errors.jsonl --channels=error
 pit log add dump file .cell/logs/dump.jsonl '--channels=*' --exclude=console
+pit log add debug console --channels=error,debug --stack=error,debug
 ```
 
 ### pit log remove

docs/logging.md

@@ -29,14 +29,16 @@ Non-text values are JSON-encoded automatically.
 
 ## Default Behavior
 
-With no configuration, a default sink routes `console`, `error`, and `system` to the terminal in pretty format:
+With no configuration, a default sink routes `console`, `error`, and `system` to the terminal in pretty format. The `error` channel includes a stack trace by default:
 
 ```
-[a3f12] [console] main.ce:5 server started on port 8080
-[a3f12] [error] main.ce:12 connection refused
+[a3f12] [console] server started on port 8080
+[a3f12] [error] connection refused
+    at handle_request (server.ce:42:3)
+    at main (main.ce:5:1)
 ```
 
-The format is `[actor_id] [channel] file:line message`.
+The format is `[actor_id] [channel] message`. Error stack traces are always on unless you explicitly configure a sink without them.
 
 ## Configuration
 
@@ -114,14 +116,22 @@ File sinks write one JSON-encoded record per line. Console sinks format the reco
 
 ## Stack Traces
 
-Add a `stack` field to a sink to capture a full call stack for specific channels. The value is an array of channel names.
+The `error` channel captures stack traces by default. To enable stack traces for other channels, add a `stack` field to a sink — an array of channel names that should include a call stack.
+
+Via the CLI:
+
+```bash
+pit log add terminal console --channels=console,error,debug --stack=error,debug
+```
+
+Or in `log.toml`:
 
 ```toml
 [sink.terminal]
 type = "console"
 format = "bare"
-channels = ["console", "error"]
-stack = ["error"]
+channels = ["console", "error", "debug"]
+stack = ["error", "debug"]
 ```
 
 Only channels listed in `stack` get stack traces. Other channels on the same sink print without one:
@@ -150,6 +160,7 @@ The `pit log` command manages sinks and reads log files. See [CLI — pit log](/
 pit log list                                           # show sinks
 pit log add terminal console --format=bare --channels=console
 pit log add dump file .cell/logs/dump.jsonl '--channels=*' --exclude=console
+pit log add debug console --channels=error,debug --stack=error,debug
 pit log remove terminal
 pit log read dump --lines=20 --channel=error
 pit log tail dump