diff --git a/openspec/AGENTS.md b/openspec/AGENTS.md
index 355969d8..6c1703ee 100644
--- a/openspec/AGENTS.md
+++ b/openspec/AGENTS.md
@@ -9,7 +9,7 @@ Instructions for AI coding assistants using OpenSpec for spec-driven development
 - Pick a unique `change-id`: kebab-case, verb-led (`add-`, `update-`, `remove-`, `refactor-`)
 - Scaffold: `proposal.md`, `tasks.md`, `design.md` (only if needed), and delta specs per affected capability
 - Write deltas: use `## ADDED|MODIFIED|REMOVED|RENAMED Requirements`; include at least one `#### Scenario:` per requirement
-- Validate: `openspec validate [change-id] --strict` and fix issues
+- Validate: `openspec validate [change-id] --strict --no-interactive` and fix issues
 - Request approval: Do not start implementation until proposal is approved
 
 ## Three-Stage Workflow
@@ -44,7 +44,7 @@ Skip proposal for:
 1. Review `openspec/project.md`, `openspec list`, and `openspec list --specs` to understand current context.
 2. Choose a unique verb-led `change-id` and scaffold `proposal.md`, `tasks.md`, optional `design.md`, and spec deltas under `openspec/changes/<id>/`.
 3. Draft spec deltas using `## ADDED|MODIFIED|REMOVED Requirements` with at least one `#### Scenario:` per requirement.
-4. Run `openspec validate <id> --strict` and resolve any issues before sharing the proposal.
+4. Run `openspec validate <id> --strict --no-interactive` and resolve any issues before sharing the proposal.
 
 ### Stage 2: Implementing Changes
 Track these steps as TODOs and complete them one by one.
@@ -61,7 +61,7 @@ After deployment, create separate PR to:
 - Move `changes/[name]/` → `changes/archive/YYYY-MM-DD-[name]/`
 - Update `specs/` if capabilities changed
 - Use `openspec archive <change-id> --skip-specs --yes` for tooling-only changes (always pass the change ID explicitly)
-- Run `openspec validate --strict` to confirm the archived change passes checks
+- Run `openspec validate --strict --no-interactive` to confirm the archived change passes checks
 
 ## Before Any Task
 
@@ -108,7 +108,7 @@ openspec validate              # Bulk validation mode
 
 # Debugging
 openspec show [change] --json --deltas-only
-openspec validate [change] --strict
+openspec validate [change] --strict --no-interactive
 ```
 
 ### Command Flags
@@ -160,6 +160,8 @@ New request?
 
 2. **Write proposal.md:**
 ```markdown
+# Change: [Brief description of change]
+
 ## Why
 [1-2 sentences on problem/opportunity]
 
@@ -304,7 +306,7 @@ Example for RENAMED:
 
 ```bash
 # Always use strict mode for comprehensive checks
-openspec validate [change] --strict
+openspec validate [change] --strict --no-interactive
 
 # Debug delta parsing
 openspec show [change] --json | jq '.deltas'
@@ -341,7 +343,7 @@ Users MUST provide a second factor during login.
 EOF
 
 # 4) Validate
-openspec validate $CHANGE --strict
+openspec validate $CHANGE --strict --no-interactive
 ```
 
 ## Multi-Capability Example
@@ -447,7 +449,7 @@ Only add complexity with:
 ```bash
 openspec list              # What's in progress?
 openspec show [item]       # View details
-openspec validate --strict # Is it correct?
+openspec validate --strict --no-interactive  # Is it correct?
 openspec archive <change-id> [--yes|-y]  # Mark complete (add --yes for automation)
 ```
 
diff --git a/src/core/templates/agents-template.ts b/src/core/templates/agents-template.ts
index ad6dbdae..2a4ad4c6 100644
--- a/src/core/templates/agents-template.ts
+++ b/src/core/templates/agents-template.ts
@@ -9,7 +9,7 @@ Instructions for AI coding assistants using OpenSpec for spec-driven development
 - Pick a unique \`change-id\`: kebab-case, verb-led (\`add-\`, \`update-\`, \`remove-\`, \`refactor-\`)
 - Scaffold: \`proposal.md\`, \`tasks.md\`, \`design.md\` (only if needed), and delta specs per affected capability
 - Write deltas: use \`## ADDED|MODIFIED|REMOVED|RENAMED Requirements\`; include at least one \`#### Scenario:\` per requirement
-- Validate: \`openspec validate [change-id] --strict\` and fix issues
+- Validate: \`openspec validate [change-id] --strict --no-interactive\` and fix issues
 - Request approval: Do not start implementation until proposal is approved
 
 ## Three-Stage Workflow
@@ -44,7 +44,7 @@ Skip proposal for:
 1. Review \`openspec/project.md\`, \`openspec list\`, and \`openspec list --specs\` to understand current context.
 2. Choose a unique verb-led \`change-id\` and scaffold \`proposal.md\`, \`tasks.md\`, optional \`design.md\`, and spec deltas under \`openspec/changes/<id>/\`.
 3. Draft spec deltas using \`## ADDED|MODIFIED|REMOVED Requirements\` with at least one \`#### Scenario:\` per requirement.
-4. Run \`openspec validate <id> --strict\` and resolve any issues before sharing the proposal.
+4. Run \`openspec validate <id> --strict --no-interactive\` and resolve any issues before sharing the proposal.
 
 ### Stage 2: Implementing Changes
 Track these steps as TODOs and complete them one by one.
@@ -61,7 +61,7 @@ After deployment, create separate PR to:
 - Move \`changes/[name]/\` → \`changes/archive/YYYY-MM-DD-[name]/\`
 - Update \`specs/\` if capabilities changed
 - Use \`openspec archive <change-id> --skip-specs --yes\` for tooling-only changes (always pass the change ID explicitly)
-- Run \`openspec validate --strict\` to confirm the archived change passes checks
+- Run \`openspec validate --strict --no-interactive\` to confirm the archived change passes checks
 
 ## Before Any Task
 
@@ -108,7 +108,7 @@ openspec validate              # Bulk validation mode
 
 # Debugging
 openspec show [change] --json --deltas-only
-openspec validate [change] --strict
+openspec validate [change] --strict --no-interactive
 \`\`\`
 
 ### Command Flags
@@ -306,7 +306,7 @@ Example for RENAMED:
 
 \`\`\`bash
 # Always use strict mode for comprehensive checks
-openspec validate [change] --strict
+openspec validate [change] --strict --no-interactive
 
 # Debug delta parsing
 openspec show [change] --json | jq '.deltas'
@@ -343,7 +343,7 @@ Users MUST provide a second factor during login.
 EOF
 
 # 4) Validate
-openspec validate $CHANGE --strict
+openspec validate $CHANGE --strict --no-interactive
 \`\`\`
 
 ## Multi-Capability Example
@@ -449,7 +449,7 @@ Only add complexity with:
 \`\`\`bash
 openspec list              # What's in progress?
 openspec show [item]       # View details
-openspec validate --strict # Is it correct?
+openspec validate --strict --no-interactive  # Is it correct?
 openspec archive <change-id> [--yes|-y]  # Mark complete (add --yes for automation)
 \`\`\`
 
diff --git a/src/core/templates/slash-command-templates.ts b/src/core/templates/slash-command-templates.ts
index be21328a..980e5bca 100644
--- a/src/core/templates/slash-command-templates.ts
+++ b/src/core/templates/slash-command-templates.ts
@@ -15,7 +15,7 @@ const proposalSteps = `**Steps**
 4. Capture architectural reasoning in \`design.md\` when the solution spans multiple systems, introduces new patterns, or demands trade-off discussion before committing to specs.
 5. Draft spec deltas in \`changes/<id>/specs/<capability>/spec.md\` (one folder per capability) using \`## ADDED|MODIFIED|REMOVED Requirements\` with at least one \`#### Scenario:\` per requirement and cross-reference related capabilities when relevant.
 6. Draft \`tasks.md\` as an ordered list of small, verifiable work items that deliver user-visible progress, include validation (tests, tooling), and highlight dependencies or parallelizable work.
-7. Validate with \`openspec validate <id> --strict\` and resolve every issue before sharing the proposal.`;
+7. Validate with \`openspec validate <id> --strict --no-interactive\` and resolve every issue before sharing the proposal.`;
 
 
 const proposalReferences = `**Reference**
@@ -43,7 +43,7 @@ const archiveSteps = `**Steps**
 2. Validate the change ID by running \`openspec list\` (or \`openspec show <id>\`) and stop if the change is missing, already archived, or otherwise not ready to archive.
 3. Run \`openspec archive <id> --yes\` so the CLI moves the change and applies spec updates without prompts (use \`--skip-specs\` only for tooling-only work).
 4. Review the command output to confirm the target specs were updated and the change landed in \`changes/archive/\`.
-5. Validate with \`openspec validate --strict\` and inspect with \`openspec show <id>\` if anything looks off.`;
+5. Validate with \`openspec validate --strict --no-interactive\` and inspect with \`openspec show <id>\` if anything looks off.`;
 
 const archiveReferences = `**Reference**
 - Use \`openspec list\` to confirm change IDs before archiving.
diff --git a/test/core/update.test.ts b/test/core/update.test.ts
index 83994b88..5df33dc2 100644
--- a/test/core/update.test.ts
+++ b/test/core/update.test.ts
@@ -133,7 +133,7 @@ Old slash content
     expect(updated).toContain('name: OpenSpec: Proposal');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old slash content');
 
@@ -317,7 +317,7 @@ Old slash content
     expect(updated).toContain('# OpenSpec: Proposal');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old slash content');
 
@@ -1007,7 +1007,7 @@ Old slash content
     expect(updated).toContain('name: OpenSpec: Proposal');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old slash content');
 
@@ -1085,7 +1085,7 @@ Old slash content
     expect(updated).toContain('name: OpenSpec: Proposal');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old slash content');
 
@@ -1163,7 +1163,7 @@ Old body
     expect(updated).toContain('argument-hint: old-hint');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old body');
 
@@ -1204,7 +1204,7 @@ Old slash content
     expect(updated).toContain('name: OpenSpec: Proposal');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old slash content');
 
@@ -1244,7 +1244,7 @@ Old body
     expect(updated).toContain('# OpenSpec: Proposal');
     expect(updated).toContain('**Guardrails**');
     expect(updated).toContain(
-      'Validate with `openspec validate <id> --strict`'
+      'Validate with `openspec validate <id> --strict --no-interactive`'
     );
     expect(updated).not.toContain('Old body');
 
@@ -1431,7 +1431,7 @@ More instructions after.`;
     expect(updated).toContain('## Custom Intro Title');
     expect(updated).toContain('Footer stays');
     expect(updated).not.toContain('Old body');
-    expect(updated).toContain('Validate with `openspec validate <id> --strict`');
+    expect(updated).toContain('Validate with `openspec validate <id> --strict --no-interactive`');
   });
 
   it('should handle configurator errors gracefully for CoStrict', async () => {
@@ -1487,7 +1487,7 @@ More instructions after.`;
     expect(updated).toContain('## Custom Intro Title');
     expect(updated).toContain('Footer stays');
     expect(updated).not.toContain('Old body');
-    expect(updated).toContain('Validate with `openspec validate <id> --strict`');
+    expect(updated).toContain('Validate with `openspec validate <id> --strict --no-interactive`');
   });
 
   it('should not create missing Windsurf workflows on update', async () => {