docs(demo): pin demo URLs to 127.0.0.1 to match the IPv4 loopback bind

demo/cost-ab/README.md

@@ -46,8 +46,8 @@ Each proxy serves a **live dashboard** in your browser — no commands, no extra
 
 | open in browser | shows |
 |---|---|
-| **http://localhost:47824/** (pxpipe → `b.sh`) | **`THIS SESSION — N% fewer tokens (… total)`** |
-| http://localhost:47823/ (plain → `a.sh`) | ~0% — the passthrough **control** |
+| **http://127.0.0.1:47824/** (pxpipe → `b.sh`) | **`THIS SESSION — N% fewer tokens (… total)`** |
+| http://127.0.0.1:47823/ (plain → `a.sh`) | ~0% — the passthrough **control** |
 
 It updates as the run goes. The headline is the **honest, rate-free number**: real
 server tokens (`input+cache_create+cache_read+output`) vs the same body as text

demo/cost-ab/a.sh

@@ -30,5 +30,5 @@ esac
 
 echo "LEFT = normal (passthrough :47823), model=$MODEL. Launching interactive Claude with the task..."
 # Run in $DIR via a subshell so your terminal stays in the original dir afterward.
-( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://localhost:47823 \
+( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://127.0.0.1:47823 \
   "$CB" "$PROMPT" --model "$MODEL" --setting-sources project --strict-mcp-config --no-chrome --dangerously-skip-permissions )

demo/cost-ab/b.sh

@@ -33,5 +33,5 @@ esac
 
 echo "RIGHT = pxpipe (:47824), model=$MODEL. Launching interactive Claude with the task..."
 # Run in $DIR via a subshell so your terminal stays in the original dir afterward.
-( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://localhost:47824 \
+( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://127.0.0.1:47824 \
   "$CB" "$PROMPT" --model "$MODEL" --setting-sources project --strict-mcp-config --no-chrome --dangerously-skip-permissions )

demo/cost-ab/setup.mjs

@@ -43,8 +43,8 @@ const PROMPT =
 
 // Both arms run through a proxy so BOTH are logged. LEFT = passthrough (normal),
 // RIGHT = pxpipe. See demo/cost-ab/README.md for the 4-terminal layout that starts them.
-const ON_PROXY = process.env.DEMO_ON_PROXY ?? 'http://localhost:47824';   // pxpipe
-const OFF_PROXY = process.env.DEMO_OFF_PROXY ?? 'http://localhost:47823';  // passthrough
+const ON_PROXY = process.env.DEMO_ON_PROXY ?? 'http://127.0.0.1:47824';   // pxpipe
+const OFF_PROXY = process.env.DEMO_OFF_PROXY ?? 'http://127.0.0.1:47823';  // passthrough
 
 // --setting-sources project -> use ONLY the seeded project settings (model [1m],
 //   no MCP); ignore the user global ~/.claude/settings.json.

demo/effective-context/README.md

@@ -51,7 +51,7 @@ on the dashboard "compress models" chips.
 | LEFT — plain (`a.sh`) | **may be wrong** at this size (drowns in filler) |
 
 **pxpipe correct + plain wrong = the effective-context win.** Each proxy also serves
-a live dashboard ([:47824](http://localhost:47824/) pxpipe, [:47823](http://localhost:47823/)
+a live dashboard ([:47824](http://127.0.0.1:47824/) pxpipe, [:47823](http://127.0.0.1:47823/)
 plain) showing the context/token reduction — the same number `/context` reports.
 
 ---

demo/effective-context/a.sh

@@ -30,5 +30,5 @@ esac
 
 echo "LEFT = normal (passthrough :47823), model=$MODEL. Launching interactive Claude with the needle task..."
 # Run in $DIR via a subshell so your terminal stays in the original dir afterward.
-( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://localhost:47823 \
+( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://127.0.0.1:47823 \
   "$CB" "$PROMPT" --model "$MODEL" --setting-sources project --strict-mcp-config --dangerously-skip-permissions )

demo/effective-context/b.sh

@@ -34,5 +34,5 @@ esac
 
 echo "RIGHT = pxpipe (:47824), model=$MODEL. Launching interactive Claude with the needle task..."
 # Run in $DIR via a subshell so your terminal stays in the original dir afterward.
-( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://localhost:47824 \
+( cd "$DIR" && exec env ANTHROPIC_BASE_URL=http://127.0.0.1:47824 \
   "$CB" "$PROMPT" --model "$MODEL" --setting-sources project --strict-mcp-config --dangerously-skip-permissions )