diff --git a/agents/gsd-phase-researcher.md b/agents/gsd-phase-researcher.md
index c6fd0f534..801db6a44 100644
--- a/agents/gsd-phase-researcher.md
+++ b/agents/gsd-phase-researcher.md
@@ -308,6 +308,7 @@ Verified patterns from official sources:
 ## Step 1: Receive Scope and Load Context
 
 Orchestrator provides: phase number/name, description/goal, requirements, constraints, output path.
+- Phase requirement IDs (e.g., AUTH-01, AUTH-02) — the specific requirements this phase MUST address
 
 Load phase context using init command:
 ```bash
@@ -377,6 +378,20 @@ For each domain: Context7 first → Official docs → WebSearch → Cross-verify
 </user_constraints>
 ```
 
+**If phase requirement IDs were provided**, MUST include a `<phase_requirements>` section:
+
+```markdown
+<phase_requirements>
+## Phase Requirements
+
+| ID | Description | Research Support |
+|----|-------------|-----------------|
+| {REQ-ID} | {from REQUIREMENTS.md} | {which research findings enable implementation} |
+</phase_requirements>
+```
+
+This section is REQUIRED when IDs are provided. The planner uses it to map requirements to plans.
+
 Write to: `$PHASE_DIR/$PADDED_PHASE-RESEARCH.md`
 
 ⚠️ `commit_docs` controls git only, NOT file writing. Always write first.
diff --git a/agents/gsd-plan-checker.md b/agents/gsd-plan-checker.md
index 52d13e03b..e939d46c7 100644
--- a/agents/gsd-plan-checker.md
+++ b/agents/gsd-plan-checker.md
@@ -73,6 +73,8 @@ Same methodology (goal-backward), different timing, different subject matter.
 4. For each requirement, find covering task(s) in the plan that claims it
 5. Flag requirements with no coverage or missing from all plans' `requirements` fields
 
+**FAIL the verification** if any requirement ID from the roadmap is absent from all plans' `requirements` fields. This is a blocking issue, not a warning.
+
 **Red flags:**
 - Requirement has zero tasks addressing it
 - Multiple requirements share one vague task ("implement auth" for login, logout, session)
diff --git a/agents/gsd-planner.md b/agents/gsd-planner.md
index f750bda61..90a1167d9 100644
--- a/agents/gsd-planner.md
+++ b/agents/gsd-planner.md
@@ -345,7 +345,7 @@ wave: N                     # Execution wave (1, 2, 3...)
 depends_on: []              # Plan IDs this plan requires
 files_modified: []          # Files this plan touches
 autonomous: true            # false if plan has checkpoints
-requirements: []            # Requirement IDs this plan addresses (from ROADMAP)
+requirements: []            # REQUIRED — Requirement IDs from ROADMAP this plan addresses. MUST NOT be empty.
 user_setup: []              # Human-required setup (omit if empty)
 
 must_haves:
@@ -411,7 +411,7 @@ After completion, create `.planning/phases/XX-name/{phase}-{plan}-SUMMARY.md`
 | `depends_on` | Yes | Plan IDs this plan requires |
 | `files_modified` | Yes | Files this plan touches |
 | `autonomous` | Yes | `true` if no checkpoints |
-| `requirements` | Yes | Requirement IDs this plan addresses (from ROADMAP) |
+| `requirements` | Yes | **MUST** list requirement IDs from ROADMAP. Every roadmap requirement ID MUST appear in at least one plan. |
 | `user_setup` | No | Human-required setup items |
 | `must_haves` | Yes | Goal-backward verification criteria |
 
@@ -453,7 +453,7 @@ Only include what Claude literally cannot do.
 ## The Process
 
 **Step 0: Extract Requirement IDs**
-Read ROADMAP.md `**Requirements:**` line for this phase. Strip brackets if present (e.g., `[AUTH-01, AUTH-02]` → `AUTH-01, AUTH-02`). Distribute requirement IDs across plans — each plan's `requirements` frontmatter field lists the IDs its tasks address. Every requirement ID must appear in at least one plan.
+Read ROADMAP.md `**Requirements:**` line for this phase. Strip brackets if present (e.g., `[AUTH-01, AUTH-02]` → `AUTH-01, AUTH-02`). Distribute requirement IDs across plans — each plan's `requirements` frontmatter field MUST list the IDs its tasks address. **CRITICAL:** Every requirement ID MUST appear in at least one plan. Plans with an empty `requirements` field are invalid.
 
 **Step 1: State the Goal**
 Take phase goal from ROADMAP.md. Must be outcome-shaped, not task-shaped.
diff --git a/agents/gsd-verifier.md b/agents/gsd-verifier.md
index 825dba3d1..812a7f257 100644
--- a/agents/gsd-verifier.md
+++ b/agents/gsd-verifier.md
@@ -233,17 +233,31 @@ Status: WIRED (state displayed) | NOT_WIRED (state exists, not rendered)
 
 ## Step 6: Check Requirements Coverage
 
-If REQUIREMENTS.md has requirements mapped to this phase:
+**6a. Extract requirement IDs from PLAN frontmatter:**
+
+```bash
+grep -A5 "^requirements:" "$PHASE_DIR"/*-PLAN.md 2>/dev/null
+```
+
+Collect ALL requirement IDs declared across plans for this phase.
+
+**6b. Cross-reference against REQUIREMENTS.md:**
+
+For each requirement ID from plans:
+1. Find its full description in REQUIREMENTS.md (`**REQ-ID**: description`)
+2. Map to supporting truths/artifacts verified in Steps 3-5
+3. Determine status:
+   - ✓ SATISFIED: Implementation evidence found that fulfills the requirement
+   - ✗ BLOCKED: No evidence or contradicting evidence
+   - ? NEEDS HUMAN: Can't verify programmatically (UI behavior, UX quality)
+
+**6c. Check for orphaned requirements:**
 
 ```bash
 grep -E "Phase $PHASE_NUM" .planning/REQUIREMENTS.md 2>/dev/null
 ```
 
-For each requirement: parse description → identify supporting truths/artifacts → determine status.
-
-- ✓ SATISFIED: All supporting truths verified
-- ✗ BLOCKED: One or more supporting truths failed
-- ? NEEDS HUMAN: Can't verify programmatically
+If REQUIREMENTS.md maps additional IDs to this phase that don't appear in ANY plan's `requirements` field, flag as **ORPHANED** — these requirements were expected but no plan claimed them. ORPHANED requirements MUST appear in the verification report.
 
 ## Step 7: Scan for Anti-Patterns
 
@@ -396,8 +410,8 @@ human_verification: # Only if status: human_needed
 
 ### Requirements Coverage
 
-| Requirement | Status | Blocking Issue |
-| ----------- | ------ | -------------- |
+| Requirement | Source Plan | Description | Status | Evidence |
+| ----------- | ---------- | ----------- | ------ | -------- |
 
 ### Anti-Patterns Found
 
diff --git a/get-shit-done/templates/phase-prompt.md b/get-shit-done/templates/phase-prompt.md
index 9d2f991db..202a50236 100644
--- a/get-shit-done/templates/phase-prompt.md
+++ b/get-shit-done/templates/phase-prompt.md
@@ -20,7 +20,7 @@ wave: N                     # Execution wave (1, 2, 3...). Pre-computed at plan
 depends_on: []              # Plan IDs this plan requires (e.g., ["01-01"]).
 files_modified: []          # Files this plan modifies.
 autonomous: true            # false if plan has checkpoints requiring user interaction
-requirements: []            # Requirement IDs this plan addresses (from ROADMAP)
+requirements: []            # REQUIRED — Requirement IDs from ROADMAP this plan addresses. MUST NOT be empty.
 user_setup: []              # Human-required setup Claude cannot automate (see below)
 
 # Goal-backward verification (derived during planning, verified after execution)
@@ -130,7 +130,7 @@ After completion, create `.planning/phases/XX-name/{phase}-{plan}-SUMMARY.md`
 | `depends_on` | Yes | Array of plan IDs this plan requires. |
 | `files_modified` | Yes | Files this plan touches. |
 | `autonomous` | Yes | `true` if no checkpoints, `false` if has checkpoints |
-| `requirements` | Yes | Requirement IDs this plan addresses (from ROADMAP) |
+| `requirements` | Yes | **MUST** list requirement IDs from ROADMAP. Every roadmap requirement MUST appear in at least one plan. |
 | `user_setup` | No | Array of human-required setup items (external services) |
 | `must_haves` | Yes | Goal-backward verification criteria (see below) |
 
diff --git a/get-shit-done/templates/summary.md b/get-shit-done/templates/summary.md
index a5ea4da7e..c66799b86 100644
--- a/get-shit-done/templates/summary.md
+++ b/get-shit-done/templates/summary.md
@@ -38,7 +38,7 @@ patterns-established:
   - "Pattern 1: description"
   - "Pattern 2: description"
 
-requirements-completed: []  # Requirement IDs addressed by this plan (from PLAN frontmatter)
+requirements-completed: []  # REQUIRED — Copy ALL requirement IDs from this plan's `requirements` frontmatter field.
 
 # Metrics
 duration: Xmin
diff --git a/get-shit-done/workflows/execute-phase.md b/get-shit-done/workflows/execute-phase.md
index 1c0560f77..e9f6cae52 100644
--- a/get-shit-done/workflows/execute-phase.md
+++ b/get-shit-done/workflows/execute-phase.md
@@ -291,12 +291,19 @@ node ~/.claude/get-shit-done/bin/gsd-tools.cjs commit "docs(phase-${PARENT_PHASE
 <step name="verify_phase_goal">
 Verify phase achieved its GOAL, not just completed tasks.
 
+```bash
+PHASE_REQ_IDS=$(node ~/.claude/get-shit-done/bin/gsd-tools.cjs roadmap get-phase "${PHASE_NUMBER}" | jq -r '.section' | grep -i "Requirements:" | sed 's/.*Requirements:\*\*\s*//' | sed 's/[\[\]]//g')
+```
+
 ```
 Task(
   prompt="Verify phase {phase_number} goal achievement.
 Phase directory: {phase_dir}
 Phase goal: {goal from ROADMAP.md}
-Check must_haves against actual codebase. Create VERIFICATION.md.",
+Phase requirement IDs: {phase_req_ids}
+Check must_haves against actual codebase.
+Cross-reference requirement IDs from PLAN frontmatter against REQUIREMENTS.md — every ID MUST be accounted for.
+Create VERIFICATION.md.",
   subagent_type="gsd-verifier",
   model="{verifier_model}"
 )
diff --git a/get-shit-done/workflows/execute-plan.md b/get-shit-done/workflows/execute-plan.md
index 931f7c53b..16556b5fd 100644
--- a/get-shit-done/workflows/execute-plan.md
+++ b/get-shit-done/workflows/execute-plan.md
@@ -322,7 +322,7 @@ If user_setup exists: create `{phase}-USER-SETUP.md` using template `~/.claude/g
 <step name="create_summary">
 Create `{phase}-{plan}-SUMMARY.md` at `.planning/phases/XX-name/`. Use `~/.claude/get-shit-done/templates/summary.md`.
 
-**Frontmatter:** phase, plan, subsystem, tags | requires/provides/affects | tech-stack.added/patterns | key-files.created/modified | key-decisions | requirements-completed (from PLAN.md requirements field) | duration ($DURATION), completed ($PLAN_END_TIME date).
+**Frontmatter:** phase, plan, subsystem, tags | requires/provides/affects | tech-stack.added/patterns | key-files.created/modified | key-decisions | requirements-completed (**MUST** copy `requirements` array from PLAN.md frontmatter verbatim) | duration ($DURATION), completed ($PLAN_END_TIME date).
 
 Title: `# Phase [X] Plan [Y]: [Name] Summary`
 
diff --git a/get-shit-done/workflows/plan-phase.md b/get-shit-done/workflows/plan-phase.md
index f7d24304a..0404253cf 100644
--- a/get-shit-done/workflows/plan-phase.md
+++ b/get-shit-done/workflows/plan-phase.md
@@ -96,6 +96,7 @@ Display banner:
 PHASE_DESC=$(node ~/.claude/get-shit-done/bin/gsd-tools.cjs roadmap get-phase "${PHASE}" | jq -r '.section')
 # Use requirements_content from INIT (already loaded via --include requirements)
 REQUIREMENTS=$(echo "$INIT" | jq -r '.requirements_content // empty' | grep -A100 "## Requirements" | head -50)
+PHASE_REQ_IDS=$(echo "$INIT" | jq -r '.roadmap_content // empty' | grep -i "Requirements:" | head -1 | sed 's/.*Requirements:\*\*\s*//' | sed 's/[\[\]]//g' | tr ',' '\n' | sed 's/^ *//;s/ *$//' | grep -v '^$' | tr '\n' ',' | sed 's/,$//')
 STATE_SNAP=$(node ~/.claude/get-shit-done/bin/gsd-tools.cjs state-snapshot)
 # Extract decisions from state-snapshot JSON: jq '.decisions[] | "\(.phase): \(.summary) - \(.rationale)"'
 ```
@@ -119,6 +120,7 @@ IMPORTANT: If CONTEXT.md exists below, it contains user decisions from /gsd:disc
 
 <additional_context>
 **Phase description:** {phase_description}
+**Phase requirement IDs (MUST address):** {phase_req_ids}
 **Requirements:** {requirements}
 **Prior decisions:** {decisions}
 </additional_context>
@@ -185,6 +187,7 @@ Planner prompt:
 
 **Project State:** {state_content}
 **Roadmap:** {roadmap_content}
+**Phase requirement IDs (every ID MUST appear in a plan's `requirements` field):** {phase_req_ids}
 **Requirements:** {requirements_content}
 
 **Phase Context:**
@@ -255,6 +258,7 @@ Checker prompt:
 **Phase Goal:** {goal from ROADMAP}
 
 **Plans to verify:** {plans_content}
+**Phase requirement IDs (MUST ALL be covered):** {phase_req_ids}
 **Requirements:** {requirements_content}
 
 **Phase Context:**