feat(workflow-executor): add FORCE_AI_ERROR dev mode

[Scra3]

Summary

• Adds AlwaysErrorAiModelPort adapter that makes every AI call fail immediately
• Wired via FORCE_AI_ERROR=true env var (parsed in cli-core.ts, passed as forceAiError option)
• Adds start:with-executor:ai-error script in packages/_example for one-command local testing

Usage

# in packages/_example
yarn start:with-executor:ai-error

Or manually:

FORCE_AI_ERROR=true tsx watch ../workflow-executor/src/cli.ts --pretty

Every AI-dependent step returns status: error with "The AI service is unavailable." — lets you exercise all executionType error paths without a real AI service.

🤖 Generated with Claude Code

Note

Add FORCE_AI_ERROR dev mode to workflow-executor to force AI call failures

• Adds AlwaysErrorAiModelPort in always-error-ai-model-port.ts, an AiModelPort implementation whose invoke() always rejects with AiModelPortError.
• Setting FORCE_AI_ERROR=true activates this adapter via buildCommonDependencies in build-workflow-executor.ts; the flag is silently ignored in production.
• Startup logs and CLI help text in cli-core.ts reflect forced-error mode when active.
• Behavioral Change: only available outside NODE_ENV=production; in production the flag is ignored and normal AI adapter selection applies.

^{Macroscope summarized fd00427.}

[qltysh]

All good ✅

[qltysh]

Coverage Impact

This PR will not change total coverage.

Modified Files with Diff Coverage (3)

Rating	File	% Diff	Uncovered Line #s
	packages/workflow-executor/src/build-workflow-executor.ts	100.0%
	packages/workflow-executor/src/cli-core.ts	100.0%
	...s/workflow-executor/src/adapters/always-error-ai-model-port.ts	100.0%
	Total	100.0%

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