docs: remove the "We're Hiring" section from the README

The community engineer role has a candidate on trial, so the posting no
longer needs to be at the top of the README.

skills/subagent-driven-development/SKILL.md

@@ -140,10 +140,7 @@ a ledger file, not only in todos.
   that happens, recover from `git log`.
 
 Read the plan once, note its context and Global Constraints, and create a
-todo per task. If the plan names a Spec, read that too: the spec is the
-authority the plan argues from, and conflicts inside the plan resolve
-against it. A plan with no reachable spec gets a ledger note saying so —
-rulings made without one are provisional.
+todo per task.
 
 Before dispatching Task 1, scan the plan once for conflicts:
 

skills/writing-plans/SKILL.md

@@ -66,9 +66,6 @@ independently testable deliverable.
 
 **Tech Stack:** [Key technologies/libraries]
 
-**Spec:** [path to the spec/design doc this plan implements — the plan
-argues from the spec, so the spec travels with it; executors read both]
-
 ## Global Constraints
 
 [The spec's project-wide requirements — version floors, dependency limits,