diff --git a/CHANGELOG.md b/CHANGELOG.md
index e84904c92..d2e88055b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ Format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
 ## [Unreleased]
 
+### Changed
+- **`/gsd:quick --full` flag** — Now enables all phases (discussion + research + plan-checking + verification). New `--validate` flag covers previous `--full` behavior (plan-checking + verification only) (#1498)
+
 ## [1.30.0] - 2026-03-26
 
 ### Added
diff --git a/commands/gsd/quick.md b/commands/gsd/quick.md
index 468d52745..e2ea903af 100644
--- a/commands/gsd/quick.md
+++ b/commands/gsd/quick.md
@@ -1,7 +1,7 @@
 ---
 name: gsd:quick
 description: Execute a quick task with GSD guarantees (atomic commits, state tracking) but skip optional agents
-argument-hint: "[--full] [--discuss] [--research]"
+argument-hint: "[--full] [--validate] [--discuss] [--research]"
 allowed-tools:
   - Read
   - Write
@@ -24,11 +24,13 @@ Quick mode is the same system with a shorter path:
 
 **`--discuss` flag:** Lightweight discussion phase before planning. Surfaces assumptions, clarifies gray areas, captures decisions in CONTEXT.md. Use when the task has ambiguity worth resolving upfront.
 
-**`--full` flag:** Enables plan-checking (max 2 iterations) and post-execution verification. Use when you want quality guarantees without full milestone ceremony.
+**`--full` flag:** Enables the complete quality pipeline — discussion + research + plan-checking + verification. One flag for everything.
+
+**`--validate` flag:** Enables plan-checking (max 2 iterations) and post-execution verification only. Use when you want quality guarantees without discussion or research.
 
 **`--research` flag:** Spawns a focused research agent before planning. Investigates implementation approaches, library options, and pitfalls for the task. Use when you're unsure of the best approach.
 
-Flags are composable: `--discuss --research --full` gives discussion + research + plan-checking + verification.
+Granular flags are composable: `--discuss --research --validate` gives the same result as `--full`.
 </objective>
 
 <execution_context>
diff --git a/get-shit-done/workflows/help.md b/get-shit-done/workflows/help.md
index 8d21b4be2..828047a86 100644
--- a/get-shit-done/workflows/help.md
+++ b/get-shit-done/workflows/help.md
@@ -134,7 +134,7 @@ Usage: `/gsd:do I want to start a new milestone`
 
 ### Quick Mode
 
-**`/gsd:quick [--full] [--discuss] [--research]`**
+**`/gsd:quick [--full] [--validate] [--discuss] [--research]`**
 Execute small, ad-hoc tasks with GSD guarantees but skip optional agents.
 
 Quick mode uses the same system with a shorter path:
@@ -143,14 +143,16 @@ Quick mode uses the same system with a shorter path:
 - Updates STATE.md tracking (not ROADMAP.md)
 
 Flags enable additional quality steps:
+- `--full` — Complete quality pipeline: discussion + research + plan-checking + verification
+- `--validate` — Plan-checking (max 2 iterations) and post-execution verification only
 - `--discuss` — Lightweight discussion to surface gray areas before planning
 - `--research` — Focused research agent investigates approaches before planning
-- `--full` — Adds plan-checking (max 2 iterations) and post-execution verification
 
-Flags are composable: `--discuss --research --full` gives the complete quality pipeline for a single task.
+Granular flags are composable: `--discuss --research --validate` gives the same as `--full`.
 
 Usage: `/gsd:quick`
-Usage: `/gsd:quick --research --full`
+Usage: `/gsd:quick --full`
+Usage: `/gsd:quick --research --validate`
 Result: Creates `.planning/quick/NNN-slug/PLAN.md`, `.planning/quick/NNN-slug/SUMMARY.md`
 
 ---
diff --git a/get-shit-done/workflows/quick.md b/get-shit-done/workflows/quick.md
index 89441f965..eafe92447 100644
--- a/get-shit-done/workflows/quick.md
+++ b/get-shit-done/workflows/quick.md
@@ -1,13 +1,15 @@
 <purpose>
 Execute small, ad-hoc tasks with GSD guarantees (atomic commits, STATE.md tracking). Quick mode spawns gsd-planner (quick mode) + gsd-executor(s), tracks tasks in `.planning/quick/`, and updates STATE.md's "Quick Tasks Completed" table.
 
-With `--discuss` flag: lightweight discussion phase before planning. Surfaces assumptions, clarifies gray areas, captures decisions in CONTEXT.md so the planner treats them as locked.
+With `--full` flag: enables the complete quality pipeline — discussion + research + plan-checking + verification. One flag for everything.
 
-With `--full` flag: enables plan-checking (max 2 iterations) and post-execution verification for quality guarantees without full milestone ceremony.
+With `--validate` flag: enables plan-checking (max 2 iterations) and post-execution verification only. Use when you want quality guarantees without discussion or research.
+
+With `--discuss` flag: lightweight discussion phase before planning. Surfaces assumptions, clarifies gray areas, captures decisions in CONTEXT.md so the planner treats them as locked.
 
 With `--research` flag: spawns a focused research agent before planning. Investigates implementation approaches, library options, and pitfalls. Use when you're unsure how to approach a task.
 
-Flags are composable: `--discuss --research --full` gives discussion + research + plan-checking + verification.
+Granular flags are composable: `--discuss --research --validate` gives the same result as `--full`.
 </purpose>
 
 <required_reading>
@@ -27,9 +29,10 @@ Valid GSD subagent types (use exact names — do not fall back to 'general-purpo
 **Step 1: Parse arguments and get task description**
 
 Parse `$ARGUMENTS` for:
-- `--full` flag → store as `$FULL_MODE` (true/false)
-- `--discuss` flag → store as `$DISCUSS_MODE` (true/false)
-- `--research` flag → store as `$RESEARCH_MODE` (true/false)
+- `--full` flag → store `$FULL_MODE=true`, `$DISCUSS_MODE=true`, `$RESEARCH_MODE=true`, `$VALIDATE_MODE=true`
+- `--validate` flag → store `$VALIDATE_MODE=true`
+- `--discuss` flag → store `$DISCUSS_MODE=true`
+- `--research` flag → store `$RESEARCH_MODE=true`
 - Remaining text → use as `$DESCRIPTION` if non-empty
 
 If `$DESCRIPTION` is empty after parsing, prompt user interactively:
@@ -48,25 +51,34 @@ If still empty, re-prompt: "Please provide a task description."
 
 Display banner based on active flags:
 
-If `$DISCUSS_MODE` and `$RESEARCH_MODE` and `$FULL_MODE`:
+If `$FULL_MODE` (all phases enabled — `--full` or all granular flags):
 ```
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
- GSD ► QUICK TASK (DISCUSS + RESEARCH + FULL)
+ GSD ► QUICK TASK (FULL)
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 ◆ Discussion + research + plan checking + verification enabled
 ```
 
-If `$DISCUSS_MODE` and `$FULL_MODE` (no research):
+If `$DISCUSS_MODE` and `$RESEARCH_MODE` and `$VALIDATE_MODE` (no `$FULL_MODE` — composed granularly):
 ```
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
- GSD ► QUICK TASK (DISCUSS + FULL)
+ GSD ► QUICK TASK (DISCUSS + RESEARCH + VALIDATE)
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+
+◆ Discussion + research + plan checking + verification enabled
+```
+
+If `$DISCUSS_MODE` and `$VALIDATE_MODE` (no research):
+```
+━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
+ GSD ► QUICK TASK (DISCUSS + VALIDATE)
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 ◆ Discussion + plan checking + verification enabled
 ```
 
-If `$DISCUSS_MODE` and `$RESEARCH_MODE` (no full):
+If `$DISCUSS_MODE` and `$RESEARCH_MODE` (no validate):
 ```
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  GSD ► QUICK TASK (DISCUSS + RESEARCH)
@@ -75,10 +87,10 @@ If `$DISCUSS_MODE` and `$RESEARCH_MODE` (no full):
 ◆ Discussion + research enabled
 ```
 
-If `$RESEARCH_MODE` and `$FULL_MODE` (no discuss):
+If `$RESEARCH_MODE` and `$VALIDATE_MODE` (no discuss):
 ```
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
- GSD ► QUICK TASK (RESEARCH + FULL)
+ GSD ► QUICK TASK (RESEARCH + VALIDATE)
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 ◆ Research + plan checking + verification enabled
@@ -102,10 +114,10 @@ If `$RESEARCH_MODE` only:
 ◆ Research phase enabled — investigating approaches before planning
 ```
 
-If `$FULL_MODE` only:
+If `$VALIDATE_MODE` only:
 ```
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
- GSD ► QUICK TASK (FULL MODE)
+ GSD ► QUICK TASK (VALIDATE)
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 ◆ Plan checking + verification enabled
@@ -367,16 +379,16 @@ If research file not found, warn but continue: "Research agent did not produce o
 
 **Step 5: Spawn planner (quick mode)**
 
-**If `$FULL_MODE`:** Use `quick-full` mode with stricter constraints.
+**If `$VALIDATE_MODE`:** Use `quick-full` mode with stricter constraints.
 
-**If NOT `$FULL_MODE`:** Use standard `quick` mode.
+**If NOT `$VALIDATE_MODE`:** Use standard `quick` mode.
 
 ```
 Task(
   prompt="
 <planning_context>
 
-**Mode:** ${FULL_MODE ? 'quick-full' : 'quick'}
+**Mode:** ${VALIDATE_MODE ? 'quick-full' : 'quick'}
 **Directory:** ${QUICK_DIR}
 **Description:** ${DESCRIPTION}
 
@@ -397,9 +409,9 @@ ${AGENT_SKILLS_PLANNER}
 - Create a SINGLE plan with 1-3 focused tasks
 - Quick tasks should be atomic and self-contained
 ${RESEARCH_MODE ? '- Research findings are available — use them to inform library/pattern choices' : '- No research phase'}
-${FULL_MODE ? '- Target ~40% context usage (structured for verification)' : '- Target ~30% context usage (simple, focused)'}
-${FULL_MODE ? '- MUST generate `must_haves` in plan frontmatter (truths, artifacts, key_links)' : ''}
-${FULL_MODE ? '- Each task MUST have `files`, `action`, `verify`, `done` fields' : ''}
+${VALIDATE_MODE ? '- Target ~40% context usage (structured for verification)' : '- Target ~30% context usage (simple, focused)'}
+${VALIDATE_MODE ? '- MUST generate `must_haves` in plan frontmatter (truths, artifacts, key_links)' : ''}
+${VALIDATE_MODE ? '- Each task MUST have `files`, `action`, `verify`, `done` fields' : ''}
 </constraints>
 
 <output>
@@ -422,9 +434,9 @@ If plan not found, error: "Planner failed to create ${quick_id}-PLAN.md"
 
 ---
 
-**Step 5.5: Plan-checker loop (only when `$FULL_MODE`)**
+**Step 5.5: Plan-checker loop (only when `$VALIDATE_MODE`)**
 
-Skip this step entirely if NOT `$FULL_MODE`.
+Skip this step entirely if NOT `$VALIDATE_MODE`.
 
 Display banner:
 ```
@@ -577,9 +589,9 @@ Note: For quick tasks producing multiple plans (rare), spawn executors in parall
 
 ---
 
-**Step 6.5: Verification (only when `$FULL_MODE`)**
+**Step 6.5: Verification (only when `$VALIDATE_MODE`)**
 
-Skip this step entirely if NOT `$FULL_MODE`.
+Skip this step entirely if NOT `$VALIDATE_MODE`.
 
 Display banner:
 ```
@@ -636,7 +648,7 @@ Read STATE.md and check for `### Quick Tasks Completed` section.
 
 Insert after `### Blockers/Concerns` section:
 
-**If `$FULL_MODE`:**
+**If `$VALIDATE_MODE`:**
 ```markdown
 ### Quick Tasks Completed
 
@@ -644,7 +656,7 @@ Insert after `### Blockers/Concerns` section:
 |---|-------------|------|--------|--------|-----------|
 ```
 
-**If NOT `$FULL_MODE`:**
+**If NOT `$VALIDATE_MODE`:**
 ```markdown
 ### Quick Tasks Completed
 
@@ -652,18 +664,18 @@ Insert after `### Blockers/Concerns` section:
 |---|-------------|------|--------|-----------|
 ```
 
-**Note:** If the table already exists, match its existing column format. If adding `--full` to a project that already has quick tasks without a Status column, add the Status column to the header and separator rows, and leave Status empty for the new row's predecessors.
+**Note:** If the table already exists, match its existing column format. If adding `--validate` (or `--full`) to a project that already has quick tasks without a Status column, add the Status column to the header and separator rows, and leave Status empty for the new row's predecessors.
 
 **7c. Append new row to table:**
 
 Use `date` from init:
 
-**If `$FULL_MODE` (or table has Status column):**
+**If `$VALIDATE_MODE` (or table has Status column):**
 ```markdown
 | ${quick_id} | ${DESCRIPTION} | ${date} | ${commit_hash} | ${VERIFICATION_STATUS} | [${quick_id}-${slug}](./quick/${quick_id}-${slug}/) |
 ```
 
-**If NOT `$FULL_MODE` (and table has no Status column):**
+**If NOT `$VALIDATE_MODE` (and table has no Status column):**
 ```markdown
 | ${quick_id} | ${DESCRIPTION} | ${date} | ${commit_hash} | [${quick_id}-${slug}](./quick/${quick_id}-${slug}/) |
 ```
@@ -689,7 +701,7 @@ Build file list:
 - `.planning/STATE.md`
 - If `$DISCUSS_MODE` and context file exists: `${QUICK_DIR}/${quick_id}-CONTEXT.md`
 - If `$RESEARCH_MODE` and research file exists: `${QUICK_DIR}/${quick_id}-RESEARCH.md`
-- If `$FULL_MODE` and verification file exists: `${QUICK_DIR}/${quick_id}-VERIFICATION.md`
+- If `$VALIDATE_MODE` and verification file exists: `${QUICK_DIR}/${quick_id}-VERIFICATION.md`
 
 ```bash
 node "$HOME/.claude/get-shit-done/bin/gsd-tools.cjs" commit "docs(quick-${quick_id}): ${DESCRIPTION}" --files ${file_list}
@@ -702,11 +714,11 @@ commit_hash=$(git rev-parse --short HEAD)
 
 Display completion output:
 
-**If `$FULL_MODE`:**
+**If `$VALIDATE_MODE`:**
 ```
 ---
 
-GSD > QUICK TASK COMPLETE (FULL MODE)
+GSD > QUICK TASK COMPLETE (VALIDATED)
 
 Quick Task ${quick_id}: ${DESCRIPTION}
 
@@ -720,7 +732,7 @@ Commit: ${commit_hash}
 Ready for next task: /gsd:quick ${GSD_WS}
 ```
 
-**If NOT `$FULL_MODE`:**
+**If NOT `$VALIDATE_MODE`:**
 ```
 ---
 
@@ -742,16 +754,17 @@ Ready for next task: /gsd:quick ${GSD_WS}
 <success_criteria>
 - [ ] ROADMAP.md validation passes
 - [ ] User provides task description
-- [ ] `--full`, `--discuss`, and `--research` flags parsed from arguments when present
+- [ ] `--full`, `--validate`, `--discuss`, and `--research` flags parsed from arguments when present
+- [ ] `--full` sets all booleans (`$FULL_MODE`, `$DISCUSS_MODE`, `$RESEARCH_MODE`, `$VALIDATE_MODE`)
 - [ ] Slug generated (lowercase, hyphens, max 40 chars)
 - [ ] Quick ID generated (YYMMDD-xxx format, 2s Base36 precision)
 - [ ] Directory created at `.planning/quick/YYMMDD-xxx-slug/`
 - [ ] (--discuss) Gray areas identified and presented, decisions captured in `${quick_id}-CONTEXT.md`
 - [ ] (--research) Research agent spawned, `${quick_id}-RESEARCH.md` created
 - [ ] `${quick_id}-PLAN.md` created by planner (honors CONTEXT.md decisions when --discuss, uses RESEARCH.md findings when --research)
-- [ ] (--full) Plan checker validates plan, revision loop capped at 2
+- [ ] (--validate) Plan checker validates plan, revision loop capped at 2
 - [ ] `${quick_id}-SUMMARY.md` created by executor
-- [ ] (--full) `${quick_id}-VERIFICATION.md` created by verifier
-- [ ] STATE.md updated with quick task row (Status column when --full)
+- [ ] (--validate) `${quick_id}-VERIFICATION.md` created by verifier
+- [ ] STATE.md updated with quick task row (Status column when --validate)
 - [ ] Artifacts committed
 </success_criteria>
diff --git a/tests/quick-research.test.cjs b/tests/quick-research.test.cjs
index c85e65cc0..c735f3893 100644
--- a/tests/quick-research.test.cjs
+++ b/tests/quick-research.test.cjs
@@ -279,19 +279,19 @@ describe('quick workflow: banner variants for flag combinations', () => {
     );
   });
 
-  test('has banner for research + full mode', () => {
+  test('has banner for research + validate mode', () => {
     content = fs.readFileSync(path.join(WORKFLOWS_DIR, 'quick.md'), 'utf-8');
     assert.ok(
-      content.includes('RESEARCH + FULL)'),
-      'should have banner for --research --full'
+      content.includes('RESEARCH + VALIDATE)'),
+      'should have banner for --research --validate'
     );
   });
 
-  test('has banner for all three flags', () => {
+  test('has banner for full mode (all phases)', () => {
     content = fs.readFileSync(path.join(WORKFLOWS_DIR, 'quick.md'), 'utf-8');
     assert.ok(
-      content.includes('DISCUSS + RESEARCH + FULL)'),
-      'should have banner for --discuss --research --full'
+      content.includes('QUICK TASK (FULL)'),
+      'should have banner for --full (all phases enabled)'
     );
   });
 });