~cytrogen/gstack

7911b7b974a1cef2794473a77ea93d0ac351b8c2 — Garry Tan 10 days ago b2b380b
fix: force comparison board as default variant chooser (v0.14.1.0) (#658)

* fix: force comparison board as default variant chooser

The comparison board ($D compare --serve) was being skipped in favor of
showing variants inline + AskUserQuestion "which do you prefer?" — a
degraded experience missing rating controls, comments, and remix buttons.

Changes:
- Replace "show inline" instruction with "do NOT show inline, proceed to
  comparison board" in plan-design-review/SKILL.md.tmpl
- Add CRITICAL RULE: never use AskUserQuestion as the variant chooser
- Change DESIGN_SHOTGUN_LOOP resolver to AskUserQuestion-first wait with
  polling fallback (affects all 3 consumer skills)
- Fix board URL from /design-board.html (404) to / (correct)
- Improve serve-failure fallback to show variants inline via Read tool

* chore: bump version and changelog (v0.14.1.0)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
M CHANGELOG.md => CHANGELOG.md +14 -0
@@ 1,5 1,19 @@
# Changelog

## [0.14.1.0] - 2026-03-30 — Comparison Board is the Chooser

The design comparison board now always opens automatically when reviewing variants. No more inline image + "which do you prefer?" — the board has rating controls, comments, remix/regenerate buttons, and structured feedback output. That's the experience. All 3 design skills (/plan-design-review, /design-shotgun, /design-consultation) get this fix.

### Changed

- **Comparison board is now mandatory.** After generating design variants, the agent creates a comparison board with `$D compare --serve` and sends you the URL via AskUserQuestion. You interact with the board, click Submit, and the agent reads your structured feedback from `feedback.json`. No more polling loops as the primary wait mechanism.
- **AskUserQuestion is the wait, not the chooser.** The agent uses AskUserQuestion to tell you the board is open and wait for you to finish, not to present variants inline and ask for preferences. The board URL is always included so you can click through if you lost the tab.
- **Serve-failure fallback improved.** If the comparison board server can't start, variants are shown inline via Read tool before asking for preferences — you're no longer choosing blind.

### Fixed

- **Board URL corrected.** The recovery URL now points to `http://127.0.0.1:<PORT>/` (where the server actually serves) instead of `/design-board.html` (which would 404).

## [0.14.0.0] - 2026-03-30 — Design to Code

You can now go from an approved design mockup to production-quality HTML with one command. `/design-html` takes the winning design from `/design-shotgun` and generates Pretext-native HTML where text actually reflows on resize, heights adjust to content, and layouts are dynamic. No more hardcoded CSS heights or broken text overflow.

M VERSION => VERSION +1 -1
@@ 1,1 1,1 @@
0.14.0.0
0.14.1.0

M design-consultation/SKILL.md => design-consultation/SKILL.md +48 -31
@@ 814,31 814,42 @@ $D compare --images "$_DESIGN_DIR/variant-A.png,$_DESIGN_DIR/variant-B.png,$_DES

This command generates the board HTML, starts an HTTP server on a random port,
and opens it in the user's default browser. **Run it in the background** with `&`
because the agent needs to keep running while the user interacts with the board.
because the server needs to stay running while the user interacts with the board.

**IMPORTANT: Reading feedback via file polling (not stdout):**
Parse the port from stderr output: `SERVE_STARTED: port=XXXXX`. You need this
for the board URL and for reloading during regeneration cycles.

The server writes feedback to files next to the board HTML. The agent polls for these:
**PRIMARY WAIT: AskUserQuestion with board URL**

After the board is serving, use AskUserQuestion to wait for the user. Include the
board URL so they can click it if they lost the browser tab:

"I've opened a comparison board with the design variants:
http://127.0.0.1:<PORT>/ — Rate them, leave comments, remix
elements you like, and click Submit when you're done. Let me know when you've
submitted your feedback (or paste your preferences here). If you clicked
Regenerate or Remix on the board, tell me and I'll generate new variants."

**Do NOT use AskUserQuestion to ask which variant the user prefers.** The comparison
board IS the chooser. AskUserQuestion is just the blocking wait mechanism.

**After the user responds to AskUserQuestion:**

Check for feedback files next to the board HTML:
- `$_DESIGN_DIR/feedback.json` — written when user clicks Submit (final choice)
- `$_DESIGN_DIR/feedback-pending.json` — written when user clicks Regenerate/Remix/More Like This

**Polling loop** (run after launching `$D serve` in background):

```bash
# Poll for feedback files every 5 seconds (up to 10 minutes)
for i in $(seq 1 120); do
  if [ -f "$_DESIGN_DIR/feedback.json" ]; then
    echo "SUBMIT_RECEIVED"
    cat "$_DESIGN_DIR/feedback.json"
    break
  elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
    echo "REGENERATE_RECEIVED"
    cat "$_DESIGN_DIR/feedback-pending.json"
    rm "$_DESIGN_DIR/feedback-pending.json"
    break
  fi
  sleep 5
done
if [ -f "$_DESIGN_DIR/feedback.json" ]; then
  echo "SUBMIT_RECEIVED"
  cat "$_DESIGN_DIR/feedback.json"
elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
  echo "REGENERATE_RECEIVED"
  cat "$_DESIGN_DIR/feedback-pending.json"
  rm "$_DESIGN_DIR/feedback-pending.json"
else
  echo "NO_FEEDBACK_FILE"
fi
```

The feedback JSON has this shape:


@@ 852,24 863,30 @@ The feedback JSON has this shape:
}
```

**If `feedback-pending.json` found (`"regenerated": true`):**
**If `feedback.json` found:** The user clicked Submit on the board.
Read `preferred`, `ratings`, `comments`, `overall` from the JSON. Proceed with
the approved variant.

**If `feedback-pending.json` found:** The user clicked Regenerate/Remix on the board.
1. Read `regenerateAction` from the JSON (`"different"`, `"match"`, `"more_like_B"`,
   `"remix"`, or custom text)
2. If `regenerateAction` is `"remix"`, read `remixSpec` (e.g. `{"layout":"A","colors":"B"}`)
3. Generate new variants with `$D iterate` or `$D variants` using updated brief
4. Create new board: `$D compare --images "..." --output "$_DESIGN_DIR/design-board.html"`
5. Parse the port from the `$D serve` stderr output (`SERVE_STARTED: port=XXXXX`),
   then reload the board in the user's browser (same tab):
5. Reload the board in the user's browser (same tab):
   `curl -s -X POST http://127.0.0.1:PORT/api/reload -H 'Content-Type: application/json' -d '{"html":"$_DESIGN_DIR/design-board.html"}'`
6. The board auto-refreshes. **Poll again** for the next feedback file.
7. Repeat until `feedback.json` appears (user clicked Submit).

**If `feedback.json` found (`"regenerated": false`):**
1. Read `preferred`, `ratings`, `comments`, `overall` from the JSON
2. Proceed with the approved variant

**If `$D serve` fails or no feedback within 10 minutes:** Fall back to AskUserQuestion:
"I've opened the design board. Which variant do you prefer? Any feedback?"
6. The board auto-refreshes. **AskUserQuestion again** with the same board URL to
   wait for the next round of feedback. Repeat until `feedback.json` appears.

**If `NO_FEEDBACK_FILE`:** The user typed their preferences directly in the
AskUserQuestion response instead of using the board. Use their text response
as the feedback.

**POLLING FALLBACK:** Only use polling if `$D serve` fails (no port available).
In that case, show each variant inline using the Read tool (so the user can see them),
then use AskUserQuestion:
"The comparison board server failed to start. I've shown the variants above.
Which do you prefer? Any feedback?"

**After receiving feedback (any path):** Output a clear summary confirming
what was understood:

M design-shotgun/SKILL.md => design-shotgun/SKILL.md +48 -31
@@ 676,31 676,42 @@ $D compare --images "$_DESIGN_DIR/variant-A.png,$_DESIGN_DIR/variant-B.png,$_DES

This command generates the board HTML, starts an HTTP server on a random port,
and opens it in the user's default browser. **Run it in the background** with `&`
because the agent needs to keep running while the user interacts with the board.
because the server needs to stay running while the user interacts with the board.

**IMPORTANT: Reading feedback via file polling (not stdout):**
Parse the port from stderr output: `SERVE_STARTED: port=XXXXX`. You need this
for the board URL and for reloading during regeneration cycles.

The server writes feedback to files next to the board HTML. The agent polls for these:
**PRIMARY WAIT: AskUserQuestion with board URL**

After the board is serving, use AskUserQuestion to wait for the user. Include the
board URL so they can click it if they lost the browser tab:

"I've opened a comparison board with the design variants:
http://127.0.0.1:<PORT>/ — Rate them, leave comments, remix
elements you like, and click Submit when you're done. Let me know when you've
submitted your feedback (or paste your preferences here). If you clicked
Regenerate or Remix on the board, tell me and I'll generate new variants."

**Do NOT use AskUserQuestion to ask which variant the user prefers.** The comparison
board IS the chooser. AskUserQuestion is just the blocking wait mechanism.

**After the user responds to AskUserQuestion:**

Check for feedback files next to the board HTML:
- `$_DESIGN_DIR/feedback.json` — written when user clicks Submit (final choice)
- `$_DESIGN_DIR/feedback-pending.json` — written when user clicks Regenerate/Remix/More Like This

**Polling loop** (run after launching `$D serve` in background):

```bash
# Poll for feedback files every 5 seconds (up to 10 minutes)
for i in $(seq 1 120); do
  if [ -f "$_DESIGN_DIR/feedback.json" ]; then
    echo "SUBMIT_RECEIVED"
    cat "$_DESIGN_DIR/feedback.json"
    break
  elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
    echo "REGENERATE_RECEIVED"
    cat "$_DESIGN_DIR/feedback-pending.json"
    rm "$_DESIGN_DIR/feedback-pending.json"
    break
  fi
  sleep 5
done
if [ -f "$_DESIGN_DIR/feedback.json" ]; then
  echo "SUBMIT_RECEIVED"
  cat "$_DESIGN_DIR/feedback.json"
elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
  echo "REGENERATE_RECEIVED"
  cat "$_DESIGN_DIR/feedback-pending.json"
  rm "$_DESIGN_DIR/feedback-pending.json"
else
  echo "NO_FEEDBACK_FILE"
fi
```

The feedback JSON has this shape:


@@ 714,24 725,30 @@ The feedback JSON has this shape:
}
```

**If `feedback-pending.json` found (`"regenerated": true`):**
**If `feedback.json` found:** The user clicked Submit on the board.
Read `preferred`, `ratings`, `comments`, `overall` from the JSON. Proceed with
the approved variant.

**If `feedback-pending.json` found:** The user clicked Regenerate/Remix on the board.
1. Read `regenerateAction` from the JSON (`"different"`, `"match"`, `"more_like_B"`,
   `"remix"`, or custom text)
2. If `regenerateAction` is `"remix"`, read `remixSpec` (e.g. `{"layout":"A","colors":"B"}`)
3. Generate new variants with `$D iterate` or `$D variants` using updated brief
4. Create new board: `$D compare --images "..." --output "$_DESIGN_DIR/design-board.html"`
5. Parse the port from the `$D serve` stderr output (`SERVE_STARTED: port=XXXXX`),
   then reload the board in the user's browser (same tab):
5. Reload the board in the user's browser (same tab):
   `curl -s -X POST http://127.0.0.1:PORT/api/reload -H 'Content-Type: application/json' -d '{"html":"$_DESIGN_DIR/design-board.html"}'`
6. The board auto-refreshes. **Poll again** for the next feedback file.
7. Repeat until `feedback.json` appears (user clicked Submit).

**If `feedback.json` found (`"regenerated": false`):**
1. Read `preferred`, `ratings`, `comments`, `overall` from the JSON
2. Proceed with the approved variant

**If `$D serve` fails or no feedback within 10 minutes:** Fall back to AskUserQuestion:
"I've opened the design board. Which variant do you prefer? Any feedback?"
6. The board auto-refreshes. **AskUserQuestion again** with the same board URL to
   wait for the next round of feedback. Repeat until `feedback.json` appears.

**If `NO_FEEDBACK_FILE`:** The user typed their preferences directly in the
AskUserQuestion response instead of using the board. Use their text response
as the feedback.

**POLLING FALLBACK:** Only use polling if `$D serve` fails (no port available).
In that case, show each variant inline using the Read tool (so the user can see them),
then use AskUserQuestion:
"The comparison board server failed to start. I've shown the variants above.
Which do you prefer? Any feedback?"

**After receiving feedback (any path):** Output a clear summary confirming
what was understood:

M plan-design-review/SKILL.md => plan-design-review/SKILL.md +51 -34
@@ 675,11 675,10 @@ $D check --image "$_DESIGN_DIR/variant-A.png" --brief "<the original brief>"

Flag any variants that fail the quality check. Offer to regenerate failures.

Show each variant inline (Read tool on each PNG) so the user sees them immediately.

Tell the user: "I've generated design directions. Take a look at the variants above,
then use the comparison board that just opened in your browser to pick your favorite,
rate the others, remix elements, and click Submit when you're done."
**Do NOT show variants inline via Read tool and ask for preferences.** Proceed
directly to the Comparison Board + Feedback Loop section below. The comparison board
IS the chooser — it has rating controls, comments, remix/regenerate, and structured
feedback output. Showing mockups inline is a degraded experience.

### Comparison Board + Feedback Loop



@@ 691,31 690,42 @@ $D compare --images "$_DESIGN_DIR/variant-A.png,$_DESIGN_DIR/variant-B.png,$_DES

This command generates the board HTML, starts an HTTP server on a random port,
and opens it in the user's default browser. **Run it in the background** with `&`
because the agent needs to keep running while the user interacts with the board.
because the server needs to stay running while the user interacts with the board.

Parse the port from stderr output: `SERVE_STARTED: port=XXXXX`. You need this
for the board URL and for reloading during regeneration cycles.

**PRIMARY WAIT: AskUserQuestion with board URL**

After the board is serving, use AskUserQuestion to wait for the user. Include the
board URL so they can click it if they lost the browser tab:

"I've opened a comparison board with the design variants:
http://127.0.0.1:<PORT>/ — Rate them, leave comments, remix
elements you like, and click Submit when you're done. Let me know when you've
submitted your feedback (or paste your preferences here). If you clicked
Regenerate or Remix on the board, tell me and I'll generate new variants."

**Do NOT use AskUserQuestion to ask which variant the user prefers.** The comparison
board IS the chooser. AskUserQuestion is just the blocking wait mechanism.

**IMPORTANT: Reading feedback via file polling (not stdout):**
**After the user responds to AskUserQuestion:**

The server writes feedback to files next to the board HTML. The agent polls for these:
Check for feedback files next to the board HTML:
- `$_DESIGN_DIR/feedback.json` — written when user clicks Submit (final choice)
- `$_DESIGN_DIR/feedback-pending.json` — written when user clicks Regenerate/Remix/More Like This

**Polling loop** (run after launching `$D serve` in background):

```bash
# Poll for feedback files every 5 seconds (up to 10 minutes)
for i in $(seq 1 120); do
  if [ -f "$_DESIGN_DIR/feedback.json" ]; then
    echo "SUBMIT_RECEIVED"
    cat "$_DESIGN_DIR/feedback.json"
    break
  elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
    echo "REGENERATE_RECEIVED"
    cat "$_DESIGN_DIR/feedback-pending.json"
    rm "$_DESIGN_DIR/feedback-pending.json"
    break
  fi
  sleep 5
done
if [ -f "$_DESIGN_DIR/feedback.json" ]; then
  echo "SUBMIT_RECEIVED"
  cat "$_DESIGN_DIR/feedback.json"
elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
  echo "REGENERATE_RECEIVED"
  cat "$_DESIGN_DIR/feedback-pending.json"
  rm "$_DESIGN_DIR/feedback-pending.json"
else
  echo "NO_FEEDBACK_FILE"
fi
```

The feedback JSON has this shape:


@@ 729,24 739,30 @@ The feedback JSON has this shape:
}
```

**If `feedback-pending.json` found (`"regenerated": true`):**
**If `feedback.json` found:** The user clicked Submit on the board.
Read `preferred`, `ratings`, `comments`, `overall` from the JSON. Proceed with
the approved variant.

**If `feedback-pending.json` found:** The user clicked Regenerate/Remix on the board.
1. Read `regenerateAction` from the JSON (`"different"`, `"match"`, `"more_like_B"`,
   `"remix"`, or custom text)
2. If `regenerateAction` is `"remix"`, read `remixSpec` (e.g. `{"layout":"A","colors":"B"}`)
3. Generate new variants with `$D iterate` or `$D variants` using updated brief
4. Create new board: `$D compare --images "..." --output "$_DESIGN_DIR/design-board.html"`
5. Parse the port from the `$D serve` stderr output (`SERVE_STARTED: port=XXXXX`),
   then reload the board in the user's browser (same tab):
5. Reload the board in the user's browser (same tab):
   `curl -s -X POST http://127.0.0.1:PORT/api/reload -H 'Content-Type: application/json' -d '{"html":"$_DESIGN_DIR/design-board.html"}'`
6. The board auto-refreshes. **Poll again** for the next feedback file.
7. Repeat until `feedback.json` appears (user clicked Submit).
6. The board auto-refreshes. **AskUserQuestion again** with the same board URL to
   wait for the next round of feedback. Repeat until `feedback.json` appears.

**If `feedback.json` found (`"regenerated": false`):**
1. Read `preferred`, `ratings`, `comments`, `overall` from the JSON
2. Proceed with the approved variant
**If `NO_FEEDBACK_FILE`:** The user typed their preferences directly in the
AskUserQuestion response instead of using the board. Use their text response
as the feedback.

**If `$D serve` fails or no feedback within 10 minutes:** Fall back to AskUserQuestion:
"I've opened the design board. Which variant do you prefer? Any feedback?"
**POLLING FALLBACK:** Only use polling if `$D serve` fails (no port available).
In that case, show each variant inline using the Read tool (so the user can see them),
then use AskUserQuestion:
"The comparison board server failed to start. I've shown the variants above.
Which do you prefer? Any feedback?"

**After receiving feedback (any path):** Output a clear summary confirming
what was understood:


@@ 1060,6 1076,7 @@ Follow the AskUserQuestion format from the Preamble above. Additional rules for 
* **Map to Design Principles above.** One sentence connecting your recommendation to a specific principle.
* Label with issue NUMBER + option LETTER (e.g., "3A", "3B").
* **Escape hatch:** If a section has no issues, say so and move on. If a gap has an obvious fix, state what you'll add and move on — don't waste a question on it. Only use AskUserQuestion when there is a genuine design choice with meaningful tradeoffs.
* **NEVER use AskUserQuestion to ask which variant the user prefers.** Always create a comparison board first (`$D compare --serve`) and open it in the browser. The board has rating controls, comments, remix/regenerate buttons, and structured feedback output. Use AskUserQuestion ONLY to notify the user the board is open and wait for them to finish — not to present variants inline and ask "which do you prefer?" That is a degraded experience.

## Required Outputs


M plan-design-review/SKILL.md.tmpl => plan-design-review/SKILL.md.tmpl +5 -5
@@ 208,11 208,10 @@ $D check --image "$_DESIGN_DIR/variant-A.png" --brief "<the original brief>"

Flag any variants that fail the quality check. Offer to regenerate failures.

Show each variant inline (Read tool on each PNG) so the user sees them immediately.

Tell the user: "I've generated design directions. Take a look at the variants above,
then use the comparison board that just opened in your browser to pick your favorite,
rate the others, remix elements, and click Submit when you're done."
**Do NOT show variants inline via Read tool and ask for preferences.** Proceed
directly to the Comparison Board + Feedback Loop section below. The comparison board
IS the chooser — it has rating controls, comments, remix/regenerate, and structured
feedback output. Showing mockups inline is a degraded experience.

{{DESIGN_SHOTGUN_LOOP}}



@@ 337,6 336,7 @@ Follow the AskUserQuestion format from the Preamble above. Additional rules for 
* **Map to Design Principles above.** One sentence connecting your recommendation to a specific principle.
* Label with issue NUMBER + option LETTER (e.g., "3A", "3B").
* **Escape hatch:** If a section has no issues, say so and move on. If a gap has an obvious fix, state what you'll add and move on — don't waste a question on it. Only use AskUserQuestion when there is a genuine design choice with meaningful tradeoffs.
* **NEVER use AskUserQuestion to ask which variant the user prefers.** Always create a comparison board first (`$D compare --serve`) and open it in the browser. The board has rating controls, comments, remix/regenerate buttons, and structured feedback output. Use AskUserQuestion ONLY to notify the user the board is open and wait for them to finish — not to present variants inline and ask "which do you prefer?" That is a degraded experience.

## Required Outputs


M scripts/resolvers/design.ts => scripts/resolvers/design.ts +48 -31
@@ 855,31 855,42 @@ $D compare --images "$_DESIGN_DIR/variant-A.png,$_DESIGN_DIR/variant-B.png,$_DES

This command generates the board HTML, starts an HTTP server on a random port,
and opens it in the user's default browser. **Run it in the background** with \`&\`
because the agent needs to keep running while the user interacts with the board.
because the server needs to stay running while the user interacts with the board.

**IMPORTANT: Reading feedback via file polling (not stdout):**
Parse the port from stderr output: \`SERVE_STARTED: port=XXXXX\`. You need this
for the board URL and for reloading during regeneration cycles.

The server writes feedback to files next to the board HTML. The agent polls for these:
**PRIMARY WAIT: AskUserQuestion with board URL**

After the board is serving, use AskUserQuestion to wait for the user. Include the
board URL so they can click it if they lost the browser tab:

"I've opened a comparison board with the design variants:
http://127.0.0.1:<PORT>/ — Rate them, leave comments, remix
elements you like, and click Submit when you're done. Let me know when you've
submitted your feedback (or paste your preferences here). If you clicked
Regenerate or Remix on the board, tell me and I'll generate new variants."

**Do NOT use AskUserQuestion to ask which variant the user prefers.** The comparison
board IS the chooser. AskUserQuestion is just the blocking wait mechanism.

**After the user responds to AskUserQuestion:**

Check for feedback files next to the board HTML:
- \`$_DESIGN_DIR/feedback.json\` — written when user clicks Submit (final choice)
- \`$_DESIGN_DIR/feedback-pending.json\` — written when user clicks Regenerate/Remix/More Like This

**Polling loop** (run after launching \`$D serve\` in background):

\`\`\`bash
# Poll for feedback files every 5 seconds (up to 10 minutes)
for i in $(seq 1 120); do
  if [ -f "$_DESIGN_DIR/feedback.json" ]; then
    echo "SUBMIT_RECEIVED"
    cat "$_DESIGN_DIR/feedback.json"
    break
  elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
    echo "REGENERATE_RECEIVED"
    cat "$_DESIGN_DIR/feedback-pending.json"
    rm "$_DESIGN_DIR/feedback-pending.json"
    break
  fi
  sleep 5
done
if [ -f "$_DESIGN_DIR/feedback.json" ]; then
  echo "SUBMIT_RECEIVED"
  cat "$_DESIGN_DIR/feedback.json"
elif [ -f "$_DESIGN_DIR/feedback-pending.json" ]; then
  echo "REGENERATE_RECEIVED"
  cat "$_DESIGN_DIR/feedback-pending.json"
  rm "$_DESIGN_DIR/feedback-pending.json"
else
  echo "NO_FEEDBACK_FILE"
fi
\`\`\`

The feedback JSON has this shape:


@@ 893,24 904,30 @@ The feedback JSON has this shape:
}
\`\`\`

**If \`feedback-pending.json\` found (\`"regenerated": true\`):**
**If \`feedback.json\` found:** The user clicked Submit on the board.
Read \`preferred\`, \`ratings\`, \`comments\`, \`overall\` from the JSON. Proceed with
the approved variant.

**If \`feedback-pending.json\` found:** The user clicked Regenerate/Remix on the board.
1. Read \`regenerateAction\` from the JSON (\`"different"\`, \`"match"\`, \`"more_like_B"\`,
   \`"remix"\`, or custom text)
2. If \`regenerateAction\` is \`"remix"\`, read \`remixSpec\` (e.g. \`{"layout":"A","colors":"B"}\`)
3. Generate new variants with \`$D iterate\` or \`$D variants\` using updated brief
4. Create new board: \`$D compare --images "..." --output "$_DESIGN_DIR/design-board.html"\`
5. Parse the port from the \`$D serve\` stderr output (\`SERVE_STARTED: port=XXXXX\`),
   then reload the board in the user's browser (same tab):
5. Reload the board in the user's browser (same tab):
   \`curl -s -X POST http://127.0.0.1:PORT/api/reload -H 'Content-Type: application/json' -d '{"html":"$_DESIGN_DIR/design-board.html"}'\`
6. The board auto-refreshes. **Poll again** for the next feedback file.
7. Repeat until \`feedback.json\` appears (user clicked Submit).

**If \`feedback.json\` found (\`"regenerated": false\`):**
1. Read \`preferred\`, \`ratings\`, \`comments\`, \`overall\` from the JSON
2. Proceed with the approved variant

**If \`$D serve\` fails or no feedback within 10 minutes:** Fall back to AskUserQuestion:
"I've opened the design board. Which variant do you prefer? Any feedback?"
6. The board auto-refreshes. **AskUserQuestion again** with the same board URL to
   wait for the next round of feedback. Repeat until \`feedback.json\` appears.

**If \`NO_FEEDBACK_FILE\`:** The user typed their preferences directly in the
AskUserQuestion response instead of using the board. Use their text response
as the feedback.

**POLLING FALLBACK:** Only use polling if \`$D serve\` fails (no port available).
In that case, show each variant inline using the Read tool (so the user can see them),
then use AskUserQuestion:
"The comparison board server failed to start. I've shown the variants above.
Which do you prefer? Any feedback?"

**After receiving feedback (any path):** Output a clear summary confirming
what was understood: