fix(cli): render multi-select prompts with checkbox markers

[clay-good]

Status: LGTM — one-line rendering fix plus one theme override, no behavior change.

What was wrong: The tool picker in openspec init/openspec update supports selecting multiple agents, but drew radio-button symbols (◉/○), so first-time users read it as single-choice (#647). The artifact picker in openspec schema init had the same problem via the stock inquirer icons.

How it was fixed: Both prompts now draw the [x] / [ ] checkbox markers the openspec config profile workflow picker already uses:

• src/prompts/searchable-multi-select.ts — selection icon ◉/○ → [x]/[ ] (one line).
• src/commands/schema.ts — the same theme.icon override config.ts already applies to its checkbox.

The openspec view dashboard keeps its ◉/○ glyphs on purpose: there they mark change status, not a selection, and checkboxes would falsely imply toggleability.

Replication / proof:

• Before: run openspec init — every tool row shows a radio circle (screenshot in OpenSpec agent selection should use checkboxes instead of radio buttons since allows multiple #647).
• After (real PTY run of the built CLI): all 29 rows render [ ], pressing Space renders [x], zero radio glyphs in the transcript; same verified for openspec schema init.
• 3 new tests pin the markers (render, toggle on, toggle off). Mutation-checked: reverting the fix makes exactly those 3 fail.
• Full suite: 2,282/2,282 pass, including the template golden-hash parity tests (untouched by this change).

Notes / nits:

• ASCII markers are strictly safer than the unicode circles: ◉ is East-Asian-Ambiguous (2 cells in some CJK terminals) and tofus on legacy Windows consoles.
• Prompt consumers (init.ts, update.ts) only read the returned value array, and no test or doc pins the old glyphs — checked repo-wide.
• Prior attempt fix: use checkbox markers in tool multiselect #1179 was closed by its author, not rejected; this supersedes it with test coverage.

Closes #647

🤖 Generated with Claude Code

Summary by CodeRabbit

• UI Improvements
  • Updated selection prompts to use familiar checkbox markers: [x] for selected items and [ ] for unselected items.
  • Applied the checkbox-style markers to the schema initialization and searchable multi-select flows.
• Tests
  • Added coverage to verify correct marker rendering and toggle behavior (select/deselect) in the searchable multi-select prompt.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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📒 Files selected for processing (1)

• test/prompts/searchable-multi-select.test.ts

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📝 Walkthrough

Walkthrough

Interactive selection prompts now display checkbox-style markers instead of radio-style symbols, with tests covering selection and deselection states.

Changes

Checkbox marker rendering

Layer / File(s)	Summary
Marker rendering and validation src/commands/schema.ts, src/prompts/searchable-multi-select.ts, test/prompts/searchable-multi-select.test.ts	Schema artifact selection and searchable multi-select choices render [x] and [ ]; tests cover initial, selected, and deselected states.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• Fission-AI/OpenSpec#561: Also changes searchable multi-select rendering to checkbox-style markers.

Suggested reviewers: alfred-openspec

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the main change: switching multi-select prompt markers to checkbox-style icons.
Linked Issues check	✅ Passed	The PR addresses #647 by replacing radio-style symbols with checkbox markers for multi-select prompts, matching the issue goal.
Out of Scope Changes check	✅ Passed	The changes stay focused on prompt marker rendering and tests, with no obvious unrelated additions.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/multiselect-checkbox-markers

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[coderabbitai]

🧹 Nitpick comments (1)

test/prompts/searchable-multi-select.test.ts (1)

224-230: 🎯 Functional Correctness | 🔵 Trivial | ⚡ Quick win

Assert the [ ] marker after deselection.

The current assertion only checks that [x] disappears, so it would still pass if the marker reverted to ○ or disappeared entirely. Assert renderOutput contains [ ] after the second Space press.

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@test/prompts/searchable-multi-select.test.ts` around lines 224 - 230, Update
the deselection test case to assert that renderOutput contains the “[ ]” marker
after the second pressKey('space') call, while retaining the existing assertion
that “[x]” is removed.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Nitpick comments:
In `@test/prompts/searchable-multi-select.test.ts`:
- Around line 224-230: Update the deselection test case to assert that
renderOutput contains the “[ ]” marker after the second pressKey('space') call,
while retaining the existing assertion that “[x]” is removed.

---

ℹ️ Review info

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Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 44d35acd-8d74-44ca-9826-d82c145eb904

📥 Commits

Reviewing files that changed from the base of the PR and between 05c7019 and 9a66c15.

📒 Files selected for processing (3)

• src/commands/schema.ts
• src/prompts/searchable-multi-select.ts
• test/prompts/searchable-multi-select.test.ts

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View logs

[alfred-openspec]

Reviewed at c177063. The init/update and schema multi-selects now use the established [x]/[ ] markers while status glyphs remain unchanged; 36 focused tests, build, lint, the 2,282-test cross-platform suite, and all CI/security checks pass.