fix: --trigger now rejects a leading uloop and shows the command to retry

[hatayama]

Summary

• --trigger now rejects a leading uloop immediately and prints the command to retry, instead of arming a pause point and then failing as an unknown command.

User Impact

• Before: --trigger "uloop simulate-keyboard --action Press --key space" armed the marker, then failed with UNKNOWN_COMMAND: Unknown command: uloop. The recovery text sent people to the triggered command's --help, which cannot explain the prefix mistake.
• After: the same value is rejected at argument parsing. NextActions includes the corrected command (for example --trigger "simulate-keyboard --action Press --key space"). --help for both await-pause-point and enable-pause-point now shows the in-process subcommand form and an example without a leading uloop.

Changes

• Reject a leading uloop token when parsing --trigger, and reconstruct the remaining tokens with quoting so whitespace-bearing arguments survive.
• Update the PAUSE_POINT_TRIGGER_FAILED recovery line so UNKNOWN_COMMAND points at the subcommand form rather than the triggered command's --help.
• Extend the --trigger help text on both await-pause-point and enable-pause-point.

Verification

• scripts/check-go-cli.sh passed (format / vet / lint / tests / rebuild).
• go test for TestParsePausePointTriggerCommandRejectsLeadingUloop, TestPausePointTriggerFailedNextActionsDiagnosesUnknownCommandPrefix, TestPausePointTriggerDescriptionsDocumentSubcommandForm, and TestRunProjectLocalAwaitPausePointHelpOptionsSection passed.
• Live: dist/darwin-arm64/uloop enable-pause-point --file Packages/src/Editor/FirstPartyTools/PausePoint/PausePointUseCase.cs --line 1 --await --timeout-seconds 5 --trigger "uloop compile" returned INVALID_ARGUMENT in argument_parsing with NextActions: ["Re-run with --trigger \"compile\""] and did not arm a marker.

[coderabbitai]

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Reviewing files that changed from the base of the PR and between acbe9c0 and 1a84770.

📒 Files selected for processing (2)

• cli/project-runner/internal/projectrunner/pause_point_trigger.go
• cli/project-runner/internal/projectrunner/pause_point_trigger_test.go

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📝 Walkthrough

Walkthrough

The change documents the pause-point --trigger subcommand format, rejects values with a leading uloop, generates validated corrections, and updates failure guidance, help expectations, tests, and shared-inputs stamps.

Changes

Pause-point trigger handling

Layer / File(s)	Summary
Trigger contract and help validation cli/common/tooldocs/pause_point_cli_options.go, cli/common/tooldocs/pause_point_cli_options_test.go, cli/project-runner/internal/projectrunner/native_command_help_test.go, cli/dispatcher/shared-inputs-stamp.json	Help descriptions and expected outputs document a single in-process subcommand without the leading uloop token. Tests verify both pause-point options.
Trigger parsing and corrections cli/project-runner/internal/projectrunner/pause_point_trigger.go, cli/project-runner/internal/projectrunner/pause_point_trigger_test.go	Parsing accepts direct subcommands and rejects leading uloop tokens. Errors include corrections only when tokenization and trigger validation succeed. Quoting preserves whitespace-bearing arguments.
Trigger failure guidance cli/project-runner/internal/projectrunner/pause_point_errors.go, cli/project-runner/internal/projectrunner/pause_point_errors_test.go, cli/project-runner/shared-inputs-stamp.json	Recovery guidance distinguishes INVALID_ARGUMENT from UNKNOWN_COMMAND. Tests verify the resulting NextActions messages.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🔵 Low · up to 1a847

The PR improves validation and retry guidance, but the generated corrected command may still allow shell substitution when copied into a shell, creating a bounded command-safety risk that should have explicit owner follow-up before or during merge.

Sequence Diagram(s)

sequenceDiagram
  participant CLI
  participant parsePausePointTriggerCommand
  participant PausePointErrorGuidance
  CLI->>parsePausePointTriggerCommand: pass --trigger subcommand
  parsePausePointTriggerCommand-->>CLI: accept direct command or reject leading uloop
  parsePausePointTriggerCommand->>CLI: provide validated quoted correction
  CLI->>PausePointErrorGuidance: classify trigger failure
  PausePointErrorGuidance-->>CLI: return INVALID_ARGUMENT or UNKNOWN_COMMAND guidance

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🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: rejecting a leading uloop and showing a corrected retry command.
Description check	✅ Passed	The description directly explains the trigger parsing change, user impact, help updates, tests, and live verification.
Docstring Coverage	✅ Passed	Docstring check was indeterminate for this PR — some files could not be analyzed in time. Not blocking.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

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• Commit on current branch

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• Create PR with unit tests
• Commit unit tests in branch fix/reject-uloop-prefix-in-pause-point-trigger

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[coderabbitai]

Actionable comments posted: 1

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Inline comments:
In `@cli/project-runner/internal/projectrunner/pause_point_trigger.go`:
- Around line 167-188: Update quotePausePointTriggerFlagValue to always use
POSIX single-quoted encoding, escaping embedded single quotes with the standard
'"'"' sequence so generated trigger values remain shell-safe and reversible.
Update quotePausePointTriggerToken to quote empty tokens as well as
whitespace-containing tokens, preserving empty arguments during formatting. Add
regressions covering literal command-substitution text and empty-argument
inputs.

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Fix all unresolved CodeRabbit comments on this PR:

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: d773fa63-e868-44b8-83f6-58ffe9a1dc64

📥 Commits

Reviewing files that changed from the base of the PR and between fdfc42b and acbe9c0.

📒 Files selected for processing (9)

• cli/common/tooldocs/pause_point_cli_options.go
• cli/common/tooldocs/pause_point_cli_options_test.go
• cli/dispatcher/shared-inputs-stamp.json
• cli/project-runner/internal/projectrunner/native_command_help_test.go
• cli/project-runner/internal/projectrunner/pause_point_errors.go
• cli/project-runner/internal/projectrunner/pause_point_errors_test.go
• cli/project-runner/internal/projectrunner/pause_point_trigger.go
• cli/project-runner/internal/projectrunner/pause_point_trigger_test.go
• cli/project-runner/shared-inputs-stamp.json

Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review.