harness-develop

name	harness-develop
description	Implement one phase from a work item plan under docs/exec-plans/current/ using the repository contract as the source of truth.
examples	["$harness-develop docs/exec-plans/current/gradebook-overrides phase=2","$harness-develop docs/exec-plans/current/platform-modernization/gradebook-overrides phase=2"]
when_to_use	["PRD, FDD, and plan exist and implementation is requested for a specific phase.","Work requires tests and validation closure."]
when_not_to_use	["Required planning inputs are missing.","Task is low-ceremony prototype work (use $harness-prototype)."]

Required Resources

Always load before coding:

• references/persona.md
• references/approach.md
• references/coding_guidelines.md
• references/stack_practices.md
• references/ui_boundaries.md
• references/development_checklist.md
• references/output_requirements.md
• references/definition_of_done.md
• references/validation.md
• assets/templates/phase_execution_record_template.md
• repository context: ARCHITECTURE.md, harness.yml, docs/PRODUCT_SENSE.md,
• Read docs/FRONTEND.md, docs/BACKEND.md, docs/CODEREVIEW.md when enabled, and the work item docs

Workflow

1. Resolve the work item directory.
2. Read prd.md, fdd.md, plan.md, and relevant design/*.md files.
3. If a phase selector is provided, implement only that phase.
4. Resolve <skills_root> as the directory that contains the installed harness skills (develop/, validate/, etc.). Do not resolve script paths relative to the repository or current working directory.
5. Run python3 <skills_root>/validate/scripts/validate_work_item.py <work_item_dir> --check all before coding.
6. Implement only the approved scope and keep a running execution record using the template.
7. Run repository-local verification and test commands from docs/TOOLING.md and docs/TESTING.md.
8. If code review is enabled in harness.yml, run at least one $harness-review round after tests pass.
9. Sync work-item docs when implementation diverges.
10. Run python3 <skills_root>/validate/scripts/validate_work_item.py <work_item_dir> --check all after implementation.
11. Final-phase only, run the requirements verification commands.