Revert sandbox-specific workspace changes

[chubes4]

Summary

• Revert PR Expose workspace tools in sandbox mode #459 so Data Machine Code no longer registers workspace tools for a consumer-specific sandbox mode.
• Remove the remote workspace backend override filter added for sandbox-host routing.
• Restore the workspace policy smoke test to assert DMC generic chat and pipeline exposure only.

Rationale

Data Machine Code should stay generic and should not know about WP Codebox or sandbox-mode naming. Consumers that need sandbox behavior should adapt at their boundary instead of adding consumer-specific modes or routing escape hatches to DMC.

Tests

• php tests/smoke-workspace-policy-tools.php
• php tests/smoke-remote-workspace-backend.php
• homeboy lint --path /Users/chubes/Developer/data-machine-code@revert-sandbox-specific-dmc --extension wordpress --changed-since origin/main --errors-only --force-hot

Reverts #459

AI assistance

• AI assistance: Yes
• Tool(s): OpenCode (GPT-5.5)
• Used for: Inspected merged PR Expose workspace tools in sandbox mode #459, reverted the consumer-specific DMC changes, ran focused smoke/lint verification, and opened this corrective PR.

[homeboy-ci]

Homeboy Results — data-machine-code

Lint

✅ lint — passed

ℹ️ Full options: homeboy docs commands/lint
ℹ️ Save lint baseline: homeboy lint data-machine-code --baseline
Deep dive: homeboy lint data-machine-code --changed-since 06c8254

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-code-lint-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-code-lint-quality-Linux-node24 contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/data-machine-code/actions/runs/26605718381

Test

✅ test — passed

ℹ️ Set --setting require_phpunit_tests=true when this component is expected to contain PHPUnit tests.
ℹ️ Auto-fix lint issues: homeboy refactor data-machine-code --from lint --write
ℹ️ Collect coverage: homeboy test data-machine-code --coverage
ℹ️ Pass args to test runner: homeboy test -- [args]
ℹ️ Full options: homeboy docs commands/test
Deep dive: homeboy test data-machine-code --changed-since 06c8254

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-code-test-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-code-test-quality-Linux-node24 contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/data-machine-code/actions/runs/26605718381

Audit

✅ audit — passed

• duplication — 4 finding(s)
• intra-method-duplication — 2 finding(s)
• dead_code — 1 finding(s)
• repeated_literal_shape — 1 finding(s)
• Total: 8 finding(s)

Deep dive: homeboy audit data-machine-code --changed-since 06c8254

Artifacts and drill-down

• CI results artifact: homeboy-ci-results-data-machine-code-audit-quality-Linux-node24 contains immediate command JSON for this action invocation.
• Observation artifact: homeboy-observations-data-machine-code-audit-quality-Linux-node24 contains exported Homeboy run history for deeper queries.
• Drill-down: download the observation artifact, then run homeboy runs import <dir>, homeboy runs list, and homeboy runs findings <run-id>.
• Artifacts are attached to the workflow run: https://github.com/Extra-Chill/data-machine-code/actions/runs/26605718381

Tooling versions

• Homeboy CLI: homeboy 0.201.2+8fe684a
• Extension: wordpress from https://github.com/Extra-Chill/homeboy-extensions
• Extension revision: 059d2aae
• Action: unknown@unknown