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# Implementation Summary

**Session ID**: `phase10-session01-cli-provider-selection-and-installer-split` **Package**: `apps/cli, apps/hooks` **Completed**: 2026-05-31 **Duration**: 3 hours

***

## Overview

This session completed the Phase 10 CLI provider-selection boundary. The CLI now routes `init`, `install`, `uninstall`, `status`, and `doctor` through explicit provider-aware handling while keeping the default Claude path intact for one release. Codex routing is recognized without mutating `~/.codex/hooks.json`, and the CLI/help/docs wording was aligned with the new provider surface.

Validation passed with 20/20 tasks complete, 15/15 deliverables found, and 22/22 tests passing.

***

## Deliverables

### Files Created

| File                                                                                                        | Purpose                                                     | Lines |
| ----------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------- | ----- |
| `apps/cli/src/lib/cliProvider.js`                                                                           | Provider parsing, validation, defaults, and routing helpers | \~120 |
| `apps/cli/src/lib/providerPosture.js`                                                                       | Compact provider posture helpers for diagnostics            | \~120 |
| `apps/cli/src/installers/claude.js`                                                                         | Claude-specific installer and uninstaller boundary          | \~240 |
| `apps/cli/src/installers/codex.js`                                                                          | Deferred Codex installer and uninstaller boundary           | \~90  |
| `apps/cli/tests/cliProvider.test.js`                                                                        | Provider parser and routing coverage                        | \~180 |
| `.spec_system/specs/phase10-session01-cli-provider-selection-and-installer-split/IMPLEMENTATION_SUMMARY.md` | Session closeout summary                                    | \~80  |

### Files Modified

| File                                                                                 | Changes                                                            |
| ------------------------------------------------------------------------------------ | ------------------------------------------------------------------ |
| `apps/cli/src/index.js`                                                              | Updated help text and provider-aware command dispatch              |
| `apps/cli/src/commands/init.js`                                                      | Routed init/install through provider selection                     |
| `apps/cli/src/commands/uninstall.js`                                                 | Routed uninstall through provider selection                        |
| `apps/cli/src/commands/status.js`                                                    | Added provider-filtered posture reporting                          |
| `apps/cli/src/commands/doctor.js`                                                    | Added provider-filtered posture checks                             |
| `apps/cli/tests/cliRuntime.test.js`                                                  | Added runtime coverage for default, claude, codex, and all routing |
| `apps/hooks/tests/installScripts.test.js`                                            | Preserved Claude installer regression coverage                     |
| `apps/cli/README_cli.md`                                                             | Documented provider selection and default behavior                 |
| `apps/hooks/README_hooks.md`                                                         | Clarified Codex map readiness boundary                             |
| `.spec_system/state.json`                                                            | Marked the session complete and advanced phase tracking            |
| `.spec_system/PRD/PRD.md`                                                            | Updated Phase 10 status map                                        |
| `.spec_system/PRD/phase_10/PRD_phase_10.md`                                          | Marked Session 01 complete and updated phase progress              |
| `.spec_system/PRD/phase_10/session_01_cli_provider_selection_and_installer_split.md` | Marked the session complete                                        |
| `package.json`                                                                       | Bumped the patch version                                           |
| `package-lock.json`                                                                  | Kept the lockfile version aligned                                  |

***

## Technical Decisions

1. **Provider routing stayed explicit**: `--cli` selection is parsed once and reused by lifecycle commands so the default Claude path remains stable while Codex stays deferred where required.
2. **Codex mutation stayed deferred**: the Codex installer boundary reports a deterministic deferred posture instead of writing user hook state before the next session owns that behavior.

***

## Test Results

| Metric   | Value        |
| -------- | ------------ |
| Tests    | 22           |
| Passed   | 22           |
| Coverage | Not reported |

***

## Lessons Learned

1. A shared provider parser keeps CLI behavior consistent across commands and reduces the chance of one path drifting from the others.
2. Closeout bookkeeping is easiest to trust when validation, phase tracking, and the PRD status map are updated together.

***

## Future Considerations

1. Session 02 should replace the deferred Codex installer boundary with safe hook merge and uninstall logic.
2. The CLI posture output should stay compact and avoid exposing raw hook command bodies or settings values as Phase 10 continues.

***

## Session Statistics

* **Tasks**: 20 completed
* **Files Created**: 6
* **Files Modified**: 15
* **Tests Added**: 22
* **Blockers**: 0 resolved


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