[deep-report] Broaden engine.driver schema description/pattern to match Copilot SDK multi-language support

[github-actions]

Description

The schema-consistency audit (#44217, 2026-07-08) found engine.driver schema/docs are narrower than the implementation. The main schema (pkg/parser/schemas/main_workflow_schema.json:12415-12420) and frontmatter-full.md:2323-2329 describe engine.driver as Pi-oriented and JS-only (.js/.cjs/.mjs), but the runtime (pkg/workflow/engine.go:61, parsing at engine.go:437-441) supports .js, .cjs, .mjs, .py, .ts, .mts, .rb, or a bare command name — and engines.md:345-365,399 already documents Copilot SDK/TS driver usage.

Broaden the schema description/pattern/examples and the frontmatter-full.md text so valid runtime-supported driver configs are not rejected or discouraged by validation/docs.

Expected Impact

Stops schema validation and docs from rejecting/discouraging configurations the runtime explicitly supports (Copilot SDK, non-JS drivers).

Suggested Agent

Schema Consistency agent.

Estimated Effort

Quick (< 1 hour)

Data Source

DeepReport 2026-07-08 · schema-consistency report #44217 (finding #3)

Generated by 🔬 Deep Report · 301.4 AIC · ⌖ 10.9 AIC · ⊞ 10K · ◷

• expires on Jul 10, 2026, 7:37 AM UTC-08:00

[github-actions]

🍪 Issue Monster selected this for Copilot

I've identified this issue as a good candidate for automated resolution and requested assignment to the Copilot coding agent.

If assignment succeeds, the Copilot coding agent will analyze the issue and create a pull request with the fix.

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