Restore Emil critique layer from the CMO original at full fidelity

[TheGreatAxios]

Restores Emil's CMO prompt layer at full fidelity: ports back every section the design-eng overhaul narrowed away (capabilities, Thinking and Reasoning laws, Boy Scout Rule, cross-reference checklist, temp-test workflow, full report format, guidelines, negative constraints). Tests assert the restored contract; prompt-size budgets raised deliberately.

Source pin: abklabs/agents plugins/cmo/agents/emil.md @ e1d626cc6b7c6c2911a94daccd7793cc03633e26 (2026-04-21; only commit ever touching that file).

Deviations from the source (deliberate, exhaustive; also in the package header):

1. Fleet framing (EmilDirector wrapper + PRIMARY INTENT), same job.
2. Lane routing to builder/draper/rand/critic/greybeard; source knows no fleet.
3. BLINDERS ON brief-scoping kept from the overhaul.
4. skills: brand-identity has no Corbits equivalent; substance inlined.
5. Report format gains Blockers/Paths per the worker envelope.
6. Temp-test path tmp/critique-tests/ kept verbatim.
7. Do-not-commit kept verbatim; commits stay parent-owned.
   Fleet fields unchanged (deliberate): maySpawn false, REVIEW_TOOLS, modelRole review, tier leaf; source model: sonnet is an agents-repo pin, not carried over.

Terminology note: the ticket says 'copy/messaging layer'; the pinned source contains no copy/messaging content (it is the design-eng critique agent housed in the CMO plugin), so this restores the prompt copy at full fidelity and adds no marketing lane. Flagging in case the ticket meant something else.

Verification: bun test src/agent/directors/emil/ 20 pass; bun run typecheck exit 0; full suite bun test ./src ./tests ./evals ./scripts --randomize --seed 424242 7139 pass / 0 fail; bun run check exit 0.

Fixes CL-7800

[linear-code]

CL-7801

CL-7800