dev: E2E and bench runners via justfile

scripts/just_help.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+topic="${1:-}"
+
+if [[ -z "$topic" || "$topic" == "root" || "$topic" == "all" ]]; then
+  cat <<'EOF'
+Parrhesia command runner
+
+Usage:
+  just <group> <subcommand> [args...]
+  just help [group]
+
+Command groups:
+  e2e <subcommand>              End-to-end harness entrypoints
+  bench <subcommand>            Benchmark tasks (local/cloud/history/chart)
+
+Notes:
+  - Keep using mix aliases for core project workflows:
+      mix setup
+      mix test
+      mix lint
+      mix precommit
+
+Examples:
+  just help bench
+  just e2e marmot
+  just e2e node-sync
+  just bench compare
+  just bench cloud --clients 3 --runs 3
+EOF
+  exit 0
+fi
+
+if [[ "$topic" == "e2e" ]]; then
+  cat <<'EOF'
+E2E commands
+
+  just e2e nak                  CLI e2e tests via nak
+  just e2e marmot               Marmot client e2e tests
+  just e2e node-sync            Local two-node sync harness
+  just e2e node-sync-docker     Docker two-node sync harness
+
+Advanced:
+  just e2e suite <name> <cmd...>
+    -> runs scripts/run_e2e_suite.sh directly
+EOF
+  exit 0
+fi
+
+if [[ "$topic" == "bench" ]]; then
+  cat <<'EOF'
+Benchmark commands
+
+  just bench compare            Local benchmark comparison table only
+  just bench collect            Append run results to bench/history.jsonl
+  just bench update             Regenerate chart + README table
+  just bench list               List machines/runs from history
+  just bench at <git-ref>       Run collect benchmark at git ref
+  just bench cloud [args...]    Cloud benchmark wrapper
+  just bench cloud-quick        Cloud smoke profile
+
+Relay-target helpers:
+  just bench relay [all|connect|echo|event|req] [nostr-bench-args...]
+  just bench relay-strfry [...]
+  just bench relay-nostr-rs [...]
+
+Examples:
+  just bench compare
+  just bench collect
+  just bench update --machine all
+  just bench at v0.5.0
+  just bench cloud --clients 3 --runs 3
+EOF
+  exit 0
+fi
+
+echo "Unknown help topic: $topic" >&2
+echo "Run: just help" >&2
+exit 1