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.

docs/subagents/agents/codex-task96-config-resolve-20260221T110058Z-k7m2.md

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+# Agent: `codex-task96-config-resolve-20260221T110058Z-k7m2`
+
+- alias: `codex-task96-config-resolve`
+- mission: `Execute TASK-96 by splitting src/config/resolve.ts into domain modules without behavior drift`
+- status: `done`
+- branch: `main`
+- started_at: `2026-02-21T11:00:58Z`
+- heartbeat_minutes: `5`
+
+## Current Work (newest first)
+
+- [2026-02-21T20:10:43Z] complete: reduced `src/config/resolve.ts` to 33 LOC orchestration facade over extracted domain modules; updated config test scripts to include resolve seam tests in src+dist lanes; ran required gates (`build`, `test:config:dist`, `check:file-budgets`) all green.
+- [2026-02-21T20:10:43Z] backlog: finalized `TASK-96` as Done with AC/DoD checked and metrics evidence (LOC 1414 -> 33; budget over-limit files 18 -> 17).
+- [2026-02-21T11:00:58Z] intent: load TASK-96 from Backlog MCP, draft execution plan with writing-plans skill, execute with executing-plans skill, no commit.
+- [2026-02-21T11:00:58Z] context: read subagent index/collaboration + prior opencode TASK-96 planning handoff.
+
+## Files Touched
+
+- `docs/subagents/INDEX.md`
+- `docs/subagents/collaboration.md`
+- `docs/subagents/agents/codex-task96-config-resolve-20260221T110058Z-k7m2.md`
+- `src/config/resolve.ts`
+- `package.json`
+
+## Assumptions
+
+- User request grants consent to execute TASK-96 on current branch and run required verification gates.
+
+## Open Questions / Blockers
+
+- None.
+
+## Next Step
+
+- Handoff complete; await user review or next task.