Issue: #1669 anet network/channel/session --help routing
Date: 2026-08-31

Worktree:
  <repo>/.worktrees/issue-1669-help-guards   # 公开仓不写本机绝对路径（check-home-path-baseline）

Before change (origin/main 89837513, built dist/bin/anet.cjs):
  anet network --help  first non-empty line: anet — AI Agent Network CLI (V2)
  anet channel --help  first non-empty line: anet — AI Agent Network CLI (V2)
  anet session --help  first non-empty line: anet — AI Agent Network CLI (V2)

After change (built dist/bin/anet.cjs):
  anet network --help  first non-empty line: anet network <command>
  anet channel --help  first non-empty line: anet channel <command>
  anet session --help  first non-empty line: anet session <command>

Commands:
  PATH="$HOME/.nvm/versions/node/v24.19.0/bin:$PATH" bun run build
  Result: pass

  PATH="$HOME/.nvm/versions/node/v24.19.0/bin:$PATH" bun test ./agent-network/src/
  Result: fail
  Summary: 943 pass, 3 skip, 1 fail, 2706 expect() calls, 947 tests across 100 files.
  Failure: agent-network/src/posix-codex-copresence.test.ts expected probePosixOwnedLoopbackConnection(process.pid, server.port) to be true, received false.

  PATH="$HOME/.nvm/versions/node/v24.19.0/bin:$PATH" bun test ./agent-network/src/top-level-help-contract.test.ts
  Result: pass
  Summary: 2 pass, 0 fail, 9 expect() calls.

  python3 scripts/check-doc-symbol-pins.py --fix
  Result: pass
  Summary: SYMBOL-PIN OK, 0 drift.
