msd-core/gsd-core/workflows/validate-phase.md

Audit Nyquist validation gaps for a completed phase. Generate missing tests. Update VALIDATION.md.

<required_reading> @~/.claude/gsd-core/references/ui-brand.md </required_reading>

<available_agent_types> Valid GSD subagent types (use exact names — do not fall back to 'general-purpose'):

• gsd-nyquist-auditor — Validates verification coverage </available_agent_types>

0. Initialize

_GSD_SHIM_NAME="gsd-tools.cjs"; _GSD_RUNTIME_ROOT="${RUNTIME_DIR:-$(git rev-parse --show-toplevel 2>/dev/null || pwd)}"; GSD_TOOLS="${_GSD_RUNTIME_ROOT}/gsd-core/bin/${_GSD_SHIM_NAME}"; if [ -f "$GSD_TOOLS" ]; then gsd_run() { node "$GSD_TOOLS" "$@"; }; elif [ -f "${_GSD_RUNTIME_ROOT}/.claude/gsd-core/bin/${_GSD_SHIM_NAME}" ]; then GSD_TOOLS="${_GSD_RUNTIME_ROOT}/.claude/gsd-core/bin/${_GSD_SHIM_NAME}"; gsd_run() { node "$GSD_TOOLS" "$@"; }; elif command -v gsd-tools >/dev/null 2>&1; then GSD_TOOLS="$(command -v gsd-tools)"; gsd_run() { "$GSD_TOOLS" "$@"; }; elif [ -f "$HOME/.claude/gsd-core/bin/${_GSD_SHIM_NAME}" ]; then GSD_TOOLS="$HOME/.claude/gsd-core/bin/${_GSD_SHIM_NAME}"; gsd_run() { node "$GSD_TOOLS" "$@"; }; else echo "ERROR: gsd-tools.cjs not found at $GSD_TOOLS and gsd-tools is not on PATH. Run: npx -y @opengsd/gsd-core@latest --claude --local" >&2; exit 1; fi
INIT=$(gsd_run query init.phase-op "${PHASE_ARG}")
if [[ "$INIT" == @file:* ]]; then INIT=$(cat "${INIT#@file:}"); fi
AGENT_SKILLS_AUDITOR=$(gsd_run query agent-skills gsd-nyquist-auditor)

Parse: phase_dir, phase_number, phase_name, phase_slug, padded_phase.

AUDITOR_MODEL=$(gsd_run query resolve-model gsd-nyquist-auditor --raw)
NYQUIST_CFG=$(gsd_run query config-get workflow.nyquist_validation --raw --default true)

If NYQUIST_CFG is false: exit with "Nyquist validation is disabled. Enable via /gsd:settings."

Display banner: GSD > VALIDATE PHASE {N}: {name}

1. Detect Input State

VALIDATION_FILE=$(ls "${PHASE_DIR}"/*-VALIDATION.md 2>/dev/null | head -1)
SUMMARY_FILES=$(ls "${PHASE_DIR}"/*-SUMMARY.md 2>/dev/null)

• State A (VALIDATION_FILE non-empty): Audit existing
• State B (VALIDATION_FILE empty, SUMMARY_FILES non-empty): Reconstruct from artifacts
• State C (SUMMARY_FILES empty): Exit — "Phase {N} not executed. Run /gsd:execute-phase {N} ${GSD_WS} first."

2. Discovery

2a. Read Phase Artifacts

Read all PLAN and SUMMARY files. Extract: task lists, requirement IDs, key-files changed, verify blocks.

2b. Build Requirement-to-Task Map

Per task: { task_id, plan_id, wave, requirement_ids, has_automated_command }

2c. Detect Test Infrastructure

State A: Parse from existing VALIDATION.md Test Infrastructure table. State B: Filesystem scan:

find . -name "pytest.ini" -o -name "jest.config.*" -o -name "vitest.config.*" -o -name "pyproject.toml" 2>/dev/null | head -10
find . \( -name "*.test.*" -o -name "*.spec.*" -o -name "test_*" \) -not -path "*/node_modules/*" 2>/dev/null | head -40

2d. Cross-Reference

Match each requirement to existing tests by filename, imports, test descriptions. Record: requirement → test_file → status.

3. Gap Analysis

Classify each requirement:

Status	Criteria
COVERED	Test exists, targets behavior, runs green
PARTIAL	Test exists, failing or incomplete
MISSING	No test found

Build: { task_id, requirement, gap_type, suggested_test_path, suggested_command }

No gaps → skip to Step 6, set nyquist_compliant: true.

4. Present Gap Plan

Text mode (workflow.text_mode: true in config or --text flag): Set TEXT_MODE=true if --text is present in $ARGUMENTS OR text_mode from init JSON is true. When TEXT_MODE is active, replace every AskUserQuestion call with a plain-text numbered list and ask the user to type their choice number. This is required for non-Claude runtimes (OpenAI Codex, Gemini CLI, etc.) where AskUserQuestion is not available. Call AskUserQuestion with gap table and options:

1. "Fix all gaps" → Step 5
2. "Skip — mark manual-only" → add to Manual-Only, Step 6
3. "Cancel" → exit

5. Spawn gsd-nyquist-auditor

Print: ◆ Spawning nyquist auditor... (runs in a subagent — no output until it returns, ~1–5 min; expected, not a freeze)

Agent(
  prompt="Read ~/.claude/agents/gsd-nyquist-auditor.md for instructions.\n\n" +
    "<files_to_read>{PLAN, SUMMARY, impl files, VALIDATION.md}</files_to_read>" +
    "<gaps>{gap list}</gaps>" +
    "<test_infrastructure>{framework, config, commands}</test_infrastructure>" +
    "<constraints>Never modify impl files. Max 3 debug iterations. Escalate impl bugs.</constraints>" +
    "${AGENT_SKILLS_AUDITOR}",
  subagent_type="gsd-nyquist-auditor",
  model="{AUDITOR_MODEL}",
  description="Fill validation gaps for Phase {N}"
)

ORCHESTRATOR RULE — CODEX RUNTIME: After calling Agent() above, stop working on this task immediately. Do not read more files, edit code, or run tests related to this task while the subagent is active. Wait for the subagent to return its result. This prevents duplicate work, conflicting edits, and wasted context. Only resume when the subagent result is available.

Handle return:

• ## GAPS FILLED → record tests + map updates, Step 6
• ## PARTIAL → record resolved, move escalated to manual-only, Step 6
• ## ESCALATE → move all to manual-only, Step 6

6. Generate/Update VALIDATION.md

State B (create):

1. Read template from ~/.claude/gsd-core/templates/VALIDATION.md
2. Fill: frontmatter, Test Infrastructure, Per-Task Map, Manual-Only, Sign-Off
3. Write to ${PHASE_DIR}/${PADDED_PHASE}-VALIDATION.md

State A (update):

1. Update Per-Task Map statuses, add escalated to Manual-Only, update frontmatter
2. Append audit trail:

## Validation Audit {date}
| Metric | Count |
|--------|-------|
| Gaps found | {N} |
| Resolved | {M} |
| Escalated | {K} |

7. Commit

git add {test_files}
git commit -m "test(phase-${PHASE}): add Nyquist validation tests"

gsd_run query commit "docs(phase-${PHASE}): add/update validation strategy"

8. Results + Routing

Compliant:

GSD > PHASE {N} IS NYQUIST-COMPLIANT
All requirements have automated verification.
▶ Next: /gsd:audit-milestone ${GSD_WS}

Partial:

GSD > PHASE {N} VALIDATED (PARTIAL)
{M} automated, {K} manual-only.
▶ Retry: /gsd:validate-phase {N} ${GSD_WS}

Display /clear reminder.

<success_criteria>

• Nyquist config checked (exit if disabled)
• Input state detected (A/B/C)
• State C exits cleanly
• PLAN/SUMMARY files read, requirement map built
• Test infrastructure detected
• Gaps classified (COVERED/PARTIAL/MISSING)
• User gate with gap table
• Auditor spawned with complete context
• All three return formats handled
• VALIDATION.md created or updated
• Test files committed separately
• Results with routing presented </success_criteria>