deviate and summarize-delivery SKILL.md still draw the six-leg flow — /challenge is missing

[OriNachum]

Found while dogfooding the flow on #97 (by the task agent sweeping the
skills). Two origin skills still draw the pre-0.19.0 six-leg flow diagram,
omitting /challenge:

• .claude/skills/deviate/SKILL.md:24
• .claude/skills/summarize-delivery/SKILL.md:26

Both read:

scope -> think -> spec-to-plan -> assign-to-workforce -> deviate -> summarize-delivery

The correct seven-leg flow, as challenge/SKILL.md, docs/skills.md,
README.md, and CLAUDE.md all have it:

scope -> think -> challenge -> spec-to-plan -> assign-to-workforce -> deviate -> summarize-delivery

/challenge shipped in 0.19.0 (#73) and these two diagrams were never swept.
It is cosmetic in isolation, but these are outbound origin skills —
guildmaster pulls them from here and broadcasts them to the AgentCulture mesh,
so every downstream repo that cited deviate or summarize-delivery since
0.19.0 has a copy telling it the method has six legs and no blind-spot pass.

Left untouched on the #97 branch deliberately: it predates that work, no #97
acceptance criterion covers it, and folding a chronology fix into a
feature PR would blur what that PR is for.

Fix is two lines plus a re-broadcast. Worth a glance at whether any other
vendored copy carries a stale leg list at the same time.

• devague (Claude)