docs: clarify pruning behavior and setup TL;DR orientation

docs/concepts/context.md

@@ -147,7 +147,7 @@ What persists across messages depends on the mechanism:
 
 - **Normal history** persists in the session transcript until compacted/pruned by policy.
 - **Compaction** persists a summary into the transcript and keeps recent messages intact.
-- **Pruning** removes old tool results from the _in-memory_ prompt for a run, but does not rewrite the transcript.
+- **Pruning** drops old tool results from the _in-memory_ prompt to free context-window space, but does not rewrite the session transcript — the full history is still inspectable on disk.
 
 Docs: [Session](/concepts/session), [Compaction](/concepts/compaction), [Session pruning](/concepts/session-pruning).
 

docs/start/setup.md

@@ -13,9 +13,11 @@ For onboarding details, see [Onboarding (CLI)](/start/wizard).
 
 ## TL;DR
 
-- **Tailoring lives outside the repo:** `~/.openclaw/workspace` (workspace) + `~/.openclaw/openclaw.json` (config).
-- **Stable workflow:** install the macOS app; let it run the bundled Gateway.
-- **Bleeding edge workflow:** run the Gateway yourself via `pnpm gateway:watch`, then let the macOS app attach in Local mode.
+Pick a setup workflow based on how often you want updates and whether you want to run the Gateway yourself:
+
+- **Tailoring lives outside the repo:** keep your config and workspace in `~/.openclaw/openclaw.json` and `~/.openclaw/workspace/` so repo updates don't touch them.
+- **Stable workflow (recommended for most):** install the macOS app and let it run the bundled Gateway.
+- **Bleeding edge workflow (dev):** run the Gateway yourself via `pnpm gateway:watch`, then let the macOS app attach in Local mode.
 
 ## Prereqs (from source)