The first cutover prerequisite: the executor now turns an agent's SkillPalette /
SubAgentPalette into delegation tools so a mort agent that delegates works
through run.Executor (the piece the `.agent run` canary needs beyond the
already-wired audit/budget).
- run/palette.go: addDelegationTools builds a skill__<name> tool (structured
inputs) per SkillPalette entry and an agent__<name> tool (prompt) per
SubAgentPalette entry, each invoking run.Ports.Palette as a CHILD of the
current run (parentRunID = inv.RunID, inheriting caller + channel). A non-ok
child status is surfaced to the parent with the partial output. nil-safe: no
PaletteSource or empty palette → no delegation tools (unchanged behavior).
- executor.go: call it right after building the low-level toolbox.
Tests: the model calls skill__helper → routed through Palette with the right
name/caller/inputs/parent; nil palette → run still works.
Deferred to C0b (the remaining run.Ports executor wiring): Critic (soft-timeout
monitor + deadline binding + steer), Delivery (output egress for surfaces that
need executor-side delivery), Checkpointer (needs a majordomo message-history
hook to snapshot resumable state). The `.agent run` canary delivers its returned
Result.Output itself, so these aren't on its critical path.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
