Issue Driven Development

Issue-Driven Development

Overview

The master coding process. Every step references specific skills. Follow in order.

Core principle: No work without an issue. No shortcuts. No exceptions.

Announce at start: "I'm using issue-driven-development to implement this work."

Before Starting

Create TodoWrite items for each step you'll execute. This is not optional.

The 13-Step Process

Step 1: Issue Check

Question: Am I working on a clearly defined GitHub issue that is tracked in the project board?

Actions:

• If no issue exists → Create one using issue-prerequisite skill
• If issue is vague → Ask questions, UPDATE the issue, then proceed
• VERIFY issue is in GitHub Project with correct fields (not assumed - verified)

Verification (MANDATORY):

# Verify issue is in project board
ITEM_ID=$(gh project item-list "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
  --format json | jq -r ".items[] | select(.content.number == [ISSUE_NUMBER]) | .id")

if [ -z "$ITEM_ID" ] || [ "$ITEM_ID" = "null" ]; then
  echo "BLOCKED: Issue not in project board. Add it before proceeding."
  # Add to project
  gh project item-add "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
    --url "$(gh issue view [ISSUE_NUMBER] --json url -q .url)"
fi

# Verify Status field is set
STATUS=$(gh project item-list "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
  --format json | jq -r ".items[] | select(.id == \"$ITEM_ID\") | .status.name")

if [ -z "$STATUS" ] || [ "$STATUS" = "null" ]; then
  echo "BLOCKED: Issue has no Status in project. Set Status before proceeding."
fi

Skill: issue-prerequisite, project-board-enforcement

Gate: Do not proceed unless:

1. GitHub issue URL exists
2. Issue is verified in GitHub Project (ITEM_ID obtained)
3. Status field is set (Ready, Backlog, or In Progress)

Step 2: Read Comments

Question: Are there comments on the issue I need to read?

Actions:

• Read all comments on the issue
• Note any decisions, clarifications, or context
• Check for linked issues or PRs

Skill: issue-lifecycle

Step 3: Size Check

Question: Is this issue too large for a single task?

Indicators of too-large:

• More than 5 acceptance criteria
• Touches more than 3 unrelated areas
• Estimated > 1 context window of work
• Multiple independent deliverables

If too large:

1. Break into sub-issues using issue-decomposition
2. Link sub-issues to parent
3. Update parent issue as parent label
4. Loop back to Step 1 with first sub-issue

Skill: issue-decomposition

Step 4: Memory Search

Question: Is there previous work on this issue or related issues?

Actions:

• Search episodic-memory for issue number, feature name, related terms
• Search mcp__memory knowledge graph for related entities
• Note any relevant context, decisions, or gotchas

Skill: memory-integration

Step 5: Research

Question: Do I need to perform research to complete this task?

Research types:

1. Repository documentation - README, CONTRIBUTING, docs/
2. Existing codebase - Similar patterns, related code
3. Online resources - API docs, library references, Stack Overflow

Actions:

• Conduct necessary research
• Document findings in issue comment if significant
• Note any blockers or concerns

Skill: pre-work-research

Step 6: Branch Check & Status Update

Question: Am I on the correct branch AND has the project status been updated?

Rules:

• NEVER work on main
• Create feature branch if needed
• Branch from correct base (usually main, sometimes existing feature branch)

Naming: feature/issue-123-short-description or fix/issue-456-bug-name

Project Status Update (MANDATORY):

When starting work, update project board Status to "In Progress":

# Get project and field IDs
PROJECT_ID=$(gh project list --owner "$GH_PROJECT_OWNER" --format json | \
  jq -r ".projects[] | select(.number == $GITHUB_PROJECT_NUM) | .id")

STATUS_FIELD_ID=$(gh project field-list "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
  --format json | jq -r '.fields[] | select(.name == "Status") | .id')

IN_PROGRESS_ID=$(gh project field-list "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
  --format json | jq -r '.fields[] | select(.name == "Status") | .options[] | select(.name == "In Progress") | .id')

# Update status to In Progress
gh project item-edit --project-id "$PROJECT_ID" --id "$ITEM_ID" \
  --field-id "$STATUS_FIELD_ID" --single-select-option-id "$IN_PROGRESS_ID"

# Verify update succeeded
NEW_STATUS=$(gh project item-list "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
  --format json | jq -r ".items[] | select(.id == \"$ITEM_ID\") | .status.name")

if [ "$NEW_STATUS" != "In Progress" ]; then
  echo "ERROR: Failed to update project status. Cannot proceed."
  exit 1
fi

Skill: branch-discipline, project-board-enforcement

Gate: Do not proceed if:

1. On main branch
2. Project Status not updated to "In Progress"

Step 7: TDD Development

Process: RED → GREEN → REFACTOR

Standards to apply simultaneously:

• tdd-full-coverage - Write test first, watch fail, minimal code to pass
• strict-typing - No any types, full typing
• inline-documentation - JSDoc/docstrings for all public APIs
• inclusive-language - Respectful terminology
• no-deferred-work - No TODOs, do it now

Actions:

• Write failing test for first acceptance criterion
• Implement minimal code to pass
• Refactor if needed
• Repeat for each criterion

Skills: tdd-full-coverage, strict-typing, inline-documentation, inclusive-language, no-deferred-work

Step 8: Verification Loop

Question: Did I succeed in delivering what is documented in the issue?

Actions:

• Run all tests
• Check each acceptance criterion
• If any failure → Return to Step 7
• If 2 consecutive failures → Trigger research-after-failure

Skill: acceptance-criteria-verification, research-after-failure

Step 9: Code Review (MANDATORY GATE)

Question: Minor change or major change?

Minor change (Step 9.1):

• Review only new tests and generated code
• Use comprehensive-review checklist

Major change (Step 9.2):

• Identify all impacted code
• Review new AND impacted tests and code
• Use comprehensive-review checklist

7 Review Criteria:

1. Blindspots - What am I missing?
2. Clarity/Consistency - Is code readable and consistent?
3. Maintainability - Can this be maintained?
4. Security - Any vulnerabilities?
5. Performance - Any bottlenecks?
6. Documentation - Adequate docs?
7. Style - Follows style guide?

Security-Sensitive Check:

# Check if any changed files are security-sensitive
git diff --name-only HEAD~1 | grep -E '(auth|security|middleware|api|password|token|secret|session|routes|\.sql)'

If matches found:

1. Invoke security-review skill OR run codex-subagent security-reviewer
2. Mark "Security-Sensitive: YES" in review artifact
3. Include security findings in artifact

HARD REQUIREMENT: Post review artifact to issue comment:

<!-- REVIEW:START -->
## Code Review Complete

| Property | Value |
|----------|-------|
| Issue | #[ISSUE] |
| Scope | [MINOR|MAJOR] |
| Security-Sensitive | [YES|NO] |
| Reviewed | [ISO_TIMESTAMP] |

[... full artifact per comprehensive-review skill ...]

**Review Status:** ✅ COMPLETE
<!-- REVIEW:END -->

Gate: PR creation will be BLOCKED by hooks if artifact not found.

Skills: review-scope, comprehensive-review, security-review, review-gate

Step 10: Implement Findings (ABSOLUTE REQUIREMENT)

Rule: Implement ALL recommendations from code review, regardless how minor.

ABSOLUTE: Every finding must result in ONE of:

1. Fixed in this PR - Code changed, tests pass, verified
2. Tracking issue created - Using deferred-finding skill

There is NO third option. "Won't fix without tracking" is NOT permitted.

Actions:

• Address each finding from review
• For findings that cannot be fixed now:
  1. Use deferred-finding skill to create tracking issue
  2. Add review-finding and spawned-from:#ISSUE labels
  3. Link tracking issue in review artifact
• Re-run affected tests
• Update review artifact to show:
  • All FIXED findings marked ✅
  • All DEFERRED findings with tracking issue #
  • "Unaddressed: 0"

Gate: Review artifact must show "Unaddressed: 0" before proceeding.

Skills: apply-all-findings, deferred-finding

Step 11: Run Full Tests

Actions:

• Run full relevant test suite (not just new tests)
• Verify no regressions
• Check test coverage if available

Skill: tdd-full-coverage

Step 12: Raise PR (GATED)

Prerequisites (verified by hooks):

• Review artifact posted to issue (Step 9)
• All findings addressed (Step 10) - "Unaddressed: 0"
• Review status is COMPLETE
• Full tests pass (Step 11)

Actions:

• Commit with descriptive message
• Push branch
• Create PR with complete documentation:
  • Summary of changes
  • Link to issue
  • Link to review artifact in issue
  • Verification report
  • Screenshots if UI changes

CRITICAL: The PreToolUse hook will BLOCK gh pr create if:

• No review artifact found in issue comments
• Review status is not COMPLETE
• Unaddressed findings > 0

If blocked, return to Step 9 or Step 10.

Skills: clean-commits, pr-creation, review-gate

Step 13: CI Monitoring → Merge → Continue

Actions:

• Wait for CI to run
• If failure → Fix and push
• Repeat until green or truly unresolvable
• If unresolvable → Document in issue, mark as blocked

When CI is green (MANDATORY):

1. Merge the PR immediately: gh pr merge [PR_NUMBER] --squash --delete-branch
2. Update project board Status to Done (verify it updated)
3. Continue to next issue (in autonomous mode, do NOT stop and report)

# When CI passes
gh pr merge [PR_NUMBER] --squash --delete-branch

# Update project status to Done
# ... project board update commands ...

# Continue to next issue (do not stop)

Do NOT:

• Report "CI is green, ready for review/merge" and wait
• Summarize completed work and ask what to do next
• Stop after a single issue when more work remains

Skills: ci-monitoring

Throughout the Process

Issue AND project board updates happen CONTINUOUSLY, not as a separate step.

Mandatory Project Board Updates

These updates are NOT optional. They are gates.

Issue Comment Updates

At minimum, update the issue:

• When starting work (Status → In Progress)
• When hitting blockers
• When making significant decisions
• When completing verification
• When raising PR

Project Board Query (NOT Labels)

CRITICAL: Use project board for state queries, NOT labels.

# WRONG - do not use labels for state
gh issue list --label "status:in-progress"

# RIGHT - query project board
gh project item-list "$GITHUB_PROJECT_NUM" --owner "$GH_PROJECT_OWNER" \
  --format json | jq -r '.items[] | select(.status.name == "In Progress")'

Skill: issue-lifecycle, project-status-sync, project-board-enforcement

Error Handling

If any step fails unexpectedly:

1. Assess severity using error-recovery
2. Preserve evidence (logs, errors)
3. Attempt recovery if possible
4. If unrecoverable, update issue as Blocked and report

Skill: error-recovery

Completion Criteria

Work is complete when:

• All acceptance criteria verified (PASS)
• All tests pass
• Build succeeds
• Code review completed (comprehensive-review)
• Security review completed (if security-sensitive files)
• Review artifact posted to issue
• All review findings addressed (Unaddressed: 0)
• Deferred findings have tracking issues
• PR created with complete documentation
• CI is green
• Issue status updated
• GitHub Project Status → Done (VERIFIED)
• Project board update confirmed (not assumed)

Quick Reference

Enforcement

This process is enforced by:

Review Enforcement

• PreToolUse hook on gh pr create - Blocks without review artifact
• PreToolUse hook on gh pr merge - Verifies CI and review
• Stop hook - Verifies review completion before session end
• Conditional rules - Security-sensitive files trigger security review requirement

Project Board Enforcement

• PreToolUse hook on git checkout -b - Verifies issue is in project board
• PreToolUse hook on git checkout -b - Updates Status → In Progress
• PreToolUse hook on gh pr create - Updates Status → In Review
• Stop hook - Verifies project board status matches work state

Project Board Gate Failures

If project board verification fails:

## BLOCKED: Project Board Compliance Failed

**Issue:** #[NUMBER]
**Problem:** [Issue not in project / Status not set / Update failed]

**Required Action:**
1. Add issue to project board
2. Set required fields (Status, Type, Priority)
3. Retry the blocked action

**Command to add:**
gh project item-add $GITHUB_PROJECT_NUM --owner $GH_PROJECT_OWNER --url [ISSUE_URL]

Do NOT proceed past a project board gate failure. Fix it first.