Rationalize config file locations and update documentation

README.md

@@ -28,6 +28,13 @@ Narratio expects two YAML files:
 - `pipeline.yml`: pipeline/workspace settings
 - `session.yml`: per-session settings
 
+Pipeline config lookup for CLI commands:
+
+- if `--config <path>` is provided, Narratio uses that path
+- if `--config` is omitted, Narratio searches in this order:
+  - `/usr/local/etc/narratio/pipeline.yml`
+  - `/etc/narratio/pipeline.yml`
+
 YAML decoding is strict (`KnownFields(true)`), so unknown fields fail fast.
 
 ## Canonical Stage Order
@@ -242,9 +249,11 @@ go test ./...
 Plan a run:
 
 ```bash
-go run ./cmd/narratio plan --config examples/pipeline.minimal.yml --session examples/session.minimal.yml
+go run ./cmd/narratio plan --session examples/session.minimal.yml
 ```
 
+Use `--config <path>` to override default pipeline lookup when needed.
+
 Run full pipeline:
 
 ```bash