refactor(core): thin leftover production/compatibility bridges

[Drswith]

Summary

Post-1.12 P2 cleanup: import-graph evaluation of leftover src/services/*-production and src/core/*-compatibility bridges. Thin only what is proven redundant; keep facades required for frozen outward contracts.

Intake: mechanical dead-bridge removal / no observable behavior — no new OpenSpec change.

Aligned with team freeze + QA refinement: delete only pure pass-through / zero-ref layers; KEEP anything with differential responsibility (projection, CLI observation/lock wrapping, stdio policy, dry-run shaping, etc.).

Inventory (import-graph proof)

File	Result	Remaining production importer(s) / reason
src/core/uninstall-compatibility.ts	DELETE (inlined)	Pure pass-through (sole importer uninstall.ts) → now calls executeCoreUninstall + createProductionCoreUninstallPorts directly
runCoreSingleAgentUpdate / runCoreUpdateBatch in update-compatibility.ts	DELETE	Zero importers after 1.12 + P0/P1; invocation factories remain
src/core/installation-compatibility.ts	KEEP	core-installation-cli.ts, lifecycle-execution-production.ts — outputPolicy injection + richer Core outcomes for v1 projector
src/core/update-compatibility.ts	KEEP	lifecycle-updates-production.ts — prepare/run/dispose invocation engine
src/core/installation-production.ts	KEEP	installation-compatibility, core/client.ts, contract tests — mutate/verify/lock/state ports
src/core/update-production.ts	KEEP	update-compatibility defaults; types used by lifecycle-updates-production
src/core/production-observation.ts	KEEP	Broad Core read ports (client, install, update, packages/core internal)
src/services/lifecycle-updates-production.ts	KEEP	update.ts, idempotency/lifecycle-policy.ts — CLI observation/lock + cancellation wrapping
src/services/lifecycle-execution-production.ts	KEEP	run.ts — human stdio inherit + --install via installation-compatibility
src/services/doctor-diagnosis-production.ts	KEEP	doctor.ts — CLI-coupled observations; Core diagnosis stays CLI-free
src/services/self-upgrade-production.ts	KEEP	upgrade.ts — P3 out of scope; do not rewrite
src/commands/unmanaged-install-compatibility.ts	KEEP	install.ts, ensure.ts — frozen v1 no-op for unmanaged externals

KEEP rationale also recorded as short file comments on retained bridges.

Freeze confirmation

• Outward contracts untouched: commands/aliases, --json/--output, exit codes (incl. dry-run DRY_RUN / changed: false / exit 0), no engine/route leak in JSON, --install enum, human stdio inherit for exec
• Manual smoke: install/ensure --dry-run --json → warnings[0].code=DRY_RUN, data.changed=false, ok=true, exit 0, no top-level engine/route fields
• No published quantex-core API expansion; no YAML / release-core.yml / protect-main
• Same package/binaries/state v2; no 2.x; based on main with v1.13.0 sealed

Out of scope (explicit)

• P3: no upgrade / fix(upgrade): return NETWORK_ERROR when latest version cannot be resolved #700 / config / capabilities / commands / schema
• No YAML / .github/workflows/** / release-core.yml / protect-main
• No hard-delete of still-referenced src/lifecycle modules
• No merge of fix(upgrade): return NETWORK_ERROR when latest version cannot be resolved #700

Linked Artifacts

• OpenSpec: not required - mechanical dead-bridge removal / no observable behavior (intake classification)
• ADR: not required
• Discussion: post-1.12 cleanup P2 (after feat(core): route install/ensure --dry-run through Core preview #702 / chore(lifecycle): prune zero-ref planners after dry-run Core preview #704)

Validation

• bun run memory:check (pre-push)
• bun run lint
• bun run format:check
• bun run typecheck
• Contract tests: 17 files / 168 passed (install/ensure/update/uninstall/list/inspect/info/resolve/run/doctor + ownership/compatibility/production suites)
• Full CI three-platform — keep draft until green

Release Intent

• Release: not applicable - internal bridge thinning only (no behavior change)

Release Summary

• Not applicable - this source PR does not produce a release entry.

Docs Updated

• Not needed for product README (KEEP comments on bridges only)

Scope Check

• I did not add a new ad hoc root-level Markdown file.
• I documented KEEP/DELETE inventory in this PR.
• I did not silently expand into P3 / YAML / SDK expansion.

Closure Check

• Working tree was clean after commit.
• Branch was pushed and this PR is the active delivery artifact (draft).
• OpenSpec change not required (mechanical).
• Release is not applicable.

Notes

• Investigate-first: deleted only zero-ref helpers + the pure uninstall pass-through.
• Ownership tests that lock layered update/exec/doctor routing remain unchanged.
• Draft until CI green.