[Bug] README line 47 contradicts docs/rlm.md on rlm() return semantics

[belumume]

README.md line 47 states:

Subagents are built in: rlm(...) spawns real child agents for parallel or background work and returns their results programmatically.

packages/coding-agent/docs/rlm.md states the opposite, twice:

• line 62: "The call returns immediately after task admission with a child handle; it never waits for or returns the child's answer."
• line 72: "Results arrive only through explicit agent_message replies or files, never as an rlm() return value."

The launch post agrees with the docs, not the README: "rlm() returns at task admission with a child handle, never the child's answer; results arrive as agent_message replies."

Why this is worth a line change rather than a wording nit: the README sentence leads directly to

results = await rlm("Summarize the auth flow")

and to treating results as the child's answer. That does not raise, because the admission handle is a real object with useful attributes, so the mistake surfaces later as a child whose output never appears. Anyone whose first contact with the API is the README meets the correct model only after their first orchestration misbehaves.

Suggested replacement for line 47, docs-only, no behavior change:

Subagents are built in: rlm(...) spawns real child agents for parallel or background work and returns an admission handle immediately; their results arrive as agent_message replies.

Checked against v0.8.1. I searched the existing Discussions and did not find a prior report of this one.