> For the complete documentation index, see [llms.txt](https://faction-os.gitbook.io/faction-os-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase18-session06-codebase-issue-scanners/implementation_summary.md).

# Implementation Summary

**Session ID**: `phase18-session06-codebase-issue-scanners` **Package**: apps/server **Completed**: 2026-06-10 **Duration**: \~2 hours

***

## Overview

Implemented the Phase 18 server-side codebase issue scanner layer. The server now exposes default-off scanners for TODO-family comments, git status, lint, build/typecheck diagnostics, and test failures. Scanner findings normalize into protocol-valid `CodebaseIssue` objects, stay bounded to safe relative paths and compact messages, enforce per-category caps, and ingest only through `SuggestionManager.addCodebaseIssue`.

***

## Deliverables

### Files Created

| File                                                                                  | Purpose                                                                                                                    | Lines  |
| ------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------- | ------ |
| `apps/server/src/lib/codebaseIssueScanners.ts`                                        | Scanner options, safe issue factory, marker scanner, command parsers, command-runner boundary, caps, and manager ingestion | \~1041 |
| `apps/server/tests/codebaseIssueScanners.test.ts`                                     | Scanner, parser, cap, root approval, privacy, and manager ingestion tests                                                  | \~392  |
| `apps/server/tests/fixtures/codebase-issue-scanners/marker-fixtures.ts`               | Accepted and rejected marker source fixtures                                                                               | \~19   |
| `apps/server/tests/fixtures/codebase-issue-scanners/git-status.txt`                   | Git status parser fixture                                                                                                  | \~4    |
| `apps/server/tests/fixtures/codebase-issue-scanners/lint-output.txt`                  | Lint parser fixture                                                                                                        | \~2    |
| `apps/server/tests/fixtures/codebase-issue-scanners/build-output.txt`                 | Build/typecheck parser fixture                                                                                             | \~2    |
| `apps/server/tests/fixtures/codebase-issue-scanners/test-output.txt`                  | Test failure parser fixture                                                                                                | \~3    |
| `.spec_system/specs/phase18-session06-codebase-issue-scanners/security-compliance.md` | Security and GDPR validation report                                                                                        | \~65   |
| `.spec_system/specs/phase18-session06-codebase-issue-scanners/validation.md`          | Session validation report                                                                                                  | \~220  |

### Files Modified

| File                                                                   | Changes                                                                                                                                                       |
| ---------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `apps/server/README_server.md`                                         | Documented default-off scanner behavior, approved roots, no provider transfer, minimized output, manager-only ingestion, and later Session 07 route ownership |
| `apps/server/tests/unsupportedRoutes.test.ts`                          | Added direct `/api/suggestions/scan` planned unsupported coverage                                                                                             |
| `.spec_system/state.json`                                              | Marked Session 06 validated and complete, and cleared `current_session`                                                                                       |
| `.spec_system/PRD/phase_18/PRD_phase_18.md`                            | Updated Phase 18 progress to 6/11 and recorded Session 06 completion                                                                                          |
| `.spec_system/PRD/phase_18/session_06_codebase_issue_scanners.md`      | Marked session prerequisites and success criteria complete                                                                                                    |
| `.spec_system/specs/phase18-session06-codebase-issue-scanners/spec.md` | Marked the session complete                                                                                                                                   |
| `apps/server/package.json`                                             | Bumped package patch version                                                                                                                                  |
| `package-lock.json`                                                    | Aligned the server workspace package-lock version                                                                                                             |

***

## Technical Decisions

1. **Default-off scanner boundary**: scanner flags all default to false so no filesystem walk, command execution, or manager mutation happens without an explicit caller.
2. **Pure parsers before side effects**: TODO markers and command outputs are parsed into bounded issue candidates before any manager ingestion, keeping tests deterministic.
3. **Manager-owned persistence**: scanner ingestion writes only through `SuggestionManager.addCodebaseIssue`, preserving existing dedupe, caps, persistence, dismissal, and WebSocket snapshot behavior.
4. **Privacy-first normalization**: scan roots must pass `llmPrivacy` approval; persisted issue output is limited to safe relative paths, bounded text, and compact cap/failure metadata.

***

## Test Results

| Metric          | Value                                         |
| --------------- | --------------------------------------------- |
| Focused tests   | 26 passed                                     |
| Full repo tests | 2594 passed, 1 skipped                        |
| Typecheck       | Server package and workspace typecheck passed |
| Lint/format     | Biome lint and format check passed            |
| Coverage        | Not reported                                  |

***

## Lessons Learned

1. The scanner layer can stay small at the route boundary by leaving scan orchestration and ignore-pattern policy to Session 07.
2. Fixture-backed parser tests make it practical to validate command-output behavior without invoking local git, lint, build, or test commands.
3. Redaction and safe path normalization need to happen before manager ingestion because persisted suggestion state is the durable trust boundary.

***

## Future Considerations

Items for future sessions:

1. Session 07 should wire orchestration, scan status, and ignore patterns on top of these default-off scanner APIs.
2. Session 08 should keep on-demand analysis and project scan engines separate from this command-output scanner boundary.
3. Session 09 should render typed codebase issue cards from the normalized issue fields without relying on raw command logs or file contents.

***

## Session Statistics

* **Tasks**: 23 completed
* **Files Created**: 9
* **Files Modified**: 8
* **Tests Added**: 1 focused test file plus 5 fixture files
* **Blockers**: 0 resolved


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://faction-os.gitbook.io/faction-os-docs/.spec_system/archive/sessions/phase18-session06-codebase-issue-scanners/implementation_summary.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
