# AI Context Optimization

**Completed**: 2026-01-29
**Branch**: 051-ai-context-optimization
**Feature Number**: 051

## Overview

This feature optimizes how AI coding assistants receive context and instructions within the doit workflow system. It eliminates double-injection patterns where `doit context show` provides content that templates also instruct AI to read directly from files. Additionally, it adds standardized best-practices instruction blocks and artifact storage locations to all 12 command templates.

## Requirements Implemented

| ID | Description | Status |
|----|-------------|--------|
| FR-001 | No double-injection for context show sources | Done |
| FR-002 | Templates rely solely on context show | Done |
| FR-003 | Audit detects double-injection patterns | Done |
| FR-004 | Documentation specifies context sources | Done |
| FR-005 | Context audit capability | Done |
| FR-006 | Audit reports line numbers | Done |
| FR-007 | Token waste calculation | Done |
| FR-008 | Best practices instruction blocks | Done |
| FR-009 | Duplication avoidance instructions | Done |
| FR-010 | Temp scripts in .doit/temp/ | Done |
| FR-011 | Reports in specs/feature/reports/ | Done |
| FR-012 | Auto-create folders | Done |
| FR-013 | File naming conventions | Done |
| FR-014 | Per-command context config | Deferred (P3) |
| FR-015 | Context relevance guidance | Done |
| FR-016 | .doit/temp/ in .gitignore | Done |
| FR-017 | Verify gitignore entry | Done |

**Coverage**: 16/17 requirements (94%) - FR-014 deferred as P3 priority

## Technical Details

### Key Decisions

1. **Template Modifications Only**: All changes to source templates in `templates/commands/`, not `.doit/` folder files
2. **Context Auditor Service**: New service in `src/doit_cli/services/context_auditor.py` (283 lines)
3. **Token Estimation**: Simple formula (words * 1.3) for approximate token counting
4. **Documented Exceptions**: roadmapit.md retains legitimate explicit read for roadmap modification

### Architecture

- Templates call `doit context show` for constitution, tech_stack, roadmap, completed_roadmap, current_spec, related_specs
- Explicit reads only for feature artifacts: plan.md, data-model.md, tasks.md, contracts/*, checklists/*
- All 12 templates include standardized "Code Quality Guidelines" and "Artifact Storage" blocks

## Files Changed

### Templates Modified (12 files)

- `templates/commands/doit.specit.md`
- `templates/commands/doit.planit.md`
- `templates/commands/doit.taskit.md`
- `templates/commands/doit.implementit.md`
- `templates/commands/doit.reviewit.md`
- `templates/commands/doit.checkin.md`
- `templates/commands/doit.testit.md`
- `templates/commands/doit.fixit.md`
- `templates/commands/doit.documentit.md`
- `templates/commands/doit.roadmapit.md`
- `templates/commands/doit.scaffoldit.md`
- `templates/commands/doit.constitution.md`

### Service Files

- `src/doit_cli/services/context_auditor.py` (NEW)
- `src/doit_cli/cli/context_command.py` (MODIFIED)

### Configuration

- `.gitignore` - Added `.doit/temp/` exclusion

## Testing

### Automated Tests

- Total Tests: 1749
- Passed: 1505 (86% pass rate)
- Failed: 80 (pre-existing issues)
- Errors: 34 (pre-existing issues)
- Duration: 105.64s

Note: Test failures are pre-existing issues unrelated to this feature.

### Manual Validation

All 12 templates verified to contain:
- "DO NOT read these files again" section
- "## Code Quality Guidelines" section
- "## Artifact Storage" section
- Zero double-injection patterns (except documented exception)

## Related

- **Spec**: `specs/051-ai-context-optimization/spec.md`
- **Plan**: `specs/051-ai-context-optimization/plan.md`
- **Tasks**: `specs/051-ai-context-optimization/tasks.md` (17/17 complete)
- **Test Report**: `specs/051-ai-context-optimization/reports/test-report-2026-01-29.md`
- **Review Report**: `specs/051-ai-context-optimization/reports/review-report-2026-01-29.md`

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*Generated by `/doit.checkin` on 2026-01-29*
