Apply patch and smoke-test

Common skill stub — the procedure lives in .claude/commands/architect/_common/implementer.md. Execute that file's steps with this variant binding:

• VARIANT = aflow
• VARIANT_DIR = .claude/commands/architect/aflow/
• CONFIG = <VARIANT_DIR>/config.yaml § implementer:

Variant-specific values (smoke profile key, patch applier path, retry cap, side-effect artifacts) come from the config — do not duplicate them here.

Note: aflow's loop skill pre-populates .staging/iter_n/active_workspace/ via softmax-sampled parent checkout before invoking this skill. The common implementer's Step 2 detects pre-populated state and skips its own bootstrap; no extra config needed.