refactor(config): slim resolver facade and expand regression lanes

Collapse src/config/resolve.ts into an orchestrated pipeline over domain modules, wire launcher regression coverage into test scripts, and sync backlog/subagent tracking artifacts for completed TASK-74/TASK-96/TASK-98 follow-up planning.

backlog/tasks/task-99 - Expand-maintainability-guardrails-and-runtime-cycle-checks.md

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+---
+id: TASK-99
+title: Expand maintainability guardrails and runtime cycle checks
+status: To Do
+assignee: []
+created_date: '2026-02-21 07:15'
+updated_date: '2026-02-21 07:15'
+labels:
+  - quality
+  - architecture
+  - ci
+dependencies:
+  - TASK-96
+  - TASK-97
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Current guardrails cover `main.ts` fan-in and broad file budgets. Add targeted checks for newly extracted hotspots and runtime import-cycle detection.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Action Steps
+
+<!-- SECTION:PLAN:BEGIN -->
+1. Rebaseline file-size budgets for known hotspots (including post-TASK-96 files).
+2. Extend `check:file-budgets` config to enforce thresholds on new modules and key test files.
+3. Add runtime dependency cycle detection for `src/main/runtime/**` (script + CI hook).
+4. Wire new checks into local gate commands and CI workflow.
+5. Add failure guidance output so contributors can remediate quickly.
+6. Run gates on current branch and capture pass/fail evidence in task notes.
+<!-- SECTION:PLAN:END -->
+
+## Acceptance Criteria
+<!-- AC:BEGIN -->
+- [ ] #1 Budget thresholds include new hotspot modules and prevent silent growth.
+- [ ] #2 Runtime cycle check detects at least one injected fixture cycle in tests.
+- [ ] #3 CI runs both checks and fails fast on violations.
+- [ ] #4 Contributor guidance exists for fixing guardrail failures.
+<!-- AC:END -->
+
+## Definition of Done
+<!-- DOD:BEGIN -->
+- [ ] #1 Guardrail scripts and CI wiring merged with passing checks.
+- [ ] #2 Documentation updated with local commands and expected outputs.
+- [ ] #3 Baseline numbers recorded to justify thresholds.
+<!-- DOD:END -->
+