fix(generator): keep repeatable lookahead on wrapped option-looking lines

[thomhurst]

CLI repeatability lookahead now uses the shared description continuation scanner. Wrapped switch references stay with their option; sibling/nested declarations, blank boundaries, and real section headings stop scanning. The parser handles tab columns, padded and multi-token value hints, single-word prose, same-column detached descriptions, caller-specific option syntax, and acronym section headings without promoting unrelated scalar options or losing child options.

Cobra handling retains nested argument groups and bracket-list values. Captured gcloud and Minikube help plus adapter tests cover the resulting option shapes. Generation prerequisites provide CPU-count AWS help concurrency, bounded CLI deadlines, configured type-enhancement execution, and serialized Terraform Stacks manifest access. Terraform fixtures use a named NotInParallel group while preserving concurrent calls inside each test.

Validation:

• All 983 scraper tests, 315 type-detection tests, and 11 focused executor/concurrency checks pass after rebasing onto main 6dc510b, including continuation, real adapter, Azure/gcloud, and Terraform concurrency cases.
• Release generator solution build passes with zero warnings/errors. Scoped default formatting and git diff checks pass. Current severity-info verification reports seven pre-existing diagnostics in the newly touched Packer scraper, outside changed lines.
• The rebase retains source fixes and main's newer Azure/gcloud output. The conflicting, obsolete generated-only [Automated] Update gcloud CLI Options #4911 commit was omitted as a whole; no generated conflict was hand-resolved.
• Earlier executor/settings/enhancement/orchestration validation passed 89 tests. Earlier full generator execution reached the local 2 GB guard; that expensive check remains deferred to CI without raising limits.

Current head: 3a78c9a. Generator fingerprint: a9854ae34db30ae3459d7b1259744486a82638988ee113da25800dcb08ecff1a.

The shared scanner affects all 47 automatic tool entries, including non-Cobra adapters. Earlier generated snapshots remain intermediate; run 34839598463 is cancelled. Current repository guidance requires source fixes separately and fresh generated replacements from latest main. Final generation will follow that workflow, with generated PR creation enabled and auto-merge/coverage-shrinkage approval disabled. #4655 remains open until final code, documentation, API baselines, provenance, and matching integration checks are incorporated. Generation review findings remain open; this PR does not claim final output completion.

Refs #4655

Caller-specific same-column declarations now retain detached descriptions without rechecking their value syntax against the generic grammar. Packer supplies its regex description captures through an internal overload, preserving nested declarations while existing wrapped option-reference prose remains covered. Four new shared-helper/Packer cases pass; three initial regressions failed before the fix. Existing protected helper signatures remain unchanged.

[chatgpt-codex-connector]

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📝 Walkthrough

Walkthrough

The CLI scraper now uses shared continuation rules when it scans repeatable-option descriptions. Tests cover description columns, wrapped option-like lines, nested declarations, section boundaries, value hints, and tab separators.

Changes

CLI continuation handling

Layer / File(s)	Summary
Description-column continuation rules tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator/Scrapers/Cli/CliScraperBase.cs, tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator.Tests/Scrapers/Cli/ContinuationLineTests.cs	The scraper infers inline and layout description columns. It classifies value hints and applies shared rules to wrapped descriptions.
Repeatable option scanning tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator/Scrapers/Cli/CliScraperBase.cs, tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator.Tests/Scrapers/Cli/ContinuationLineTests.cs	HelpDeclaresRepeatableOption uses shared continuation scanning. Nested declarations, named section headings, wrapped option-like prose, and separated prose boundaries are handled.

Priority: ⚪ Not assessed

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Bug fix

Merge Risk: 🟡 Moderate · up to 0c949

Some CLI help layouts can incorrectly mark a parent option as repeatable when its description ends with “and”, “or”, or “with” before a nested option. Narrow the exception and add the regression case before merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 27.78% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 36 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Issue #4655 requires shared continuation logic, a wrapped option-looking line test, and passing generator tests. In CliScraperBase.cs, HelpDeclaresRepeatableOption now scans with `IsContinuationLi…
Out of Scope Changes check	✅ Passed	The source changes refine continuation detection, section boundaries, and description-column parsing for repeatable-option lookahead. The added tests cover the linked behavior and its required edge ca…
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: preserving repeatable-option lookahead on wrapped option-looking lines.

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Shared rules guide where prose flows
Wrapped switches stay in sight
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Reviewed commit: 178348153b

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Inline comments:
In
`@tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator/Scrapers/Cli/CliScraperBase.cs`:
- Around line 1424-1425: The InlineDescriptionPattern must skip the option
switches and any value hint before locating the description separator, so
GetDescriptionColumn captures only the actual description rather than the
value-hint column. Update InlineDescriptionPattern accordingly and add a
regression test covering multiple spaces before a value hint, preserving correct
repeatability detection in HelpDeclaresRepeatableOption.

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📥 Commits

Reviewing files that changed from the base of the PR and between e6a2c52 and 1783481.

📒 Files selected for processing (2)

• tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator.Tests/Scrapers/Cli/ContinuationLineTests.cs
• tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator/Scrapers/Cli/CliScraperBase.cs

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[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

Solid, narrowly-scoped fix with a good regression test (Repeatable_Phrase_On_A_Wrapped_Option_Looking_Line_Is_Found). The core idea — reusing IsContinuationLine with a nullable indentation floor instead of unconditionally stopping at any option-row-looking line — is a clean generalization and matches the existing AccumulateWrappedDescription pattern well. However, one real bug in the new shared regex:

Blocking: InlineDescriptionPattern grabs the wrong column when a value hint is itself separated by 2+ spaces

tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator/Scrapers/Cli/CliScraperBase.cs (new InlineDescriptionPattern, ~line 1424):

[GeneratedRegex(@"^[ \t]*\S.*?[ \t]{2,}(?<description>\S.*)$")]
private static partial Regex InlineDescriptionPattern();

The doc comment says this should capture the text "after the switches and any value hint," but the lazy .*? stops at the first run of 2+ spaces on the line, not the last. Any option row that pads a value hint away from the switch with its own multi-space gap — a very common CLI help style — will have description (and therefore GetDescriptionColumn) anchored to the value hint instead of the real description.

This isn't hypothetical: the exact shape already exists in this repo's own fixtures, e.g. ShellcheckCliScraperTests.cs:

-i CODE1,CODE2..    --include=CODE1,CODE2..    Consider only given types of warnings

Here the pattern would capture description starting at --include=CODE1,CODE2.. Consider... instead of Consider..., so GetDescriptionColumn returns a column far to the left of the true description. HelpDeclaresRepeatableOption is the only caller that derives its column from this generic regex (every other caller of AccumulateWrappedDescription/GetDescriptionColumn passes in an already-correct, tool-specific description Group), so the blast radius today is contained to HelpDeclaresRepeatableOption — but it's a shared, generically-documented helper, so the next scraper with this two-gap format (Shellcheck itself doesn't call this path yet, but nothing stops a future one from routing through it) will silently mis-detect repeatability: a too-small descriptionColumn makes wrappedAtDescriptionColumn too easy to satisfy, letting a later, unrelated option's "may be repeated" phrasing get absorbed into the wrong block (or vice versa, terminating the real block too early). No exception is raised either way — it just generates the wrong C# type.

Suggested fix: change the lazy quantifier to greedy (.* instead of .*?). Greedy backtracking naturally lands on the last run of 2+ spaces on the line, which is the actual description separator in aligned help text, and doesn't change behavior for single-gap rows (e.g. the new --env test still passes unchanged):

[GeneratedRegex(@"^[ \t]*\S.*[ \t]{2,}(?<description>\S.*)$")]

Please also add a regression test with a switch + padded value hint (mirroring the Shellcheck fixture shape) feeding into HelpDeclaresRepeatableOption, since the current test only exercises a single-gap row.

Investigated and dismissed

• Whether HelpDeclaresRepeatableOption's fixed (non-refreshed) descriptionColumn diverges from AccumulateWrappedDescription — it doesn't; neither function refreshes the column across continuation lines, so behavior is consistent between them, and the null-descriptionColumn case just falls back to the pre-PR "stop at any option-row line" behavior (no regression).
• Whether the protected → protected internal accessibility change on HelpDeclaresRepeatableOption needs a PublicAPI.Shipped.txt update — the Microsoft.CodeAnalysis.PublicApiAnalyzers package is only wired up for this project when $(PublicApiAnalyzerProject) matches its name (used only for generated integration packages in CI, not the generator tool itself), and the tracked signature text doesn't encode accessibility anyway, so no diagnostic would fire either way.

[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

The core fix is a clean generalization: reusing `IsContinuationLine` (now with a nullable indentation floor) instead of unconditionally stopping the repeatable-option scan at any option-row-looking line matches the existing `AccumulateWrappedDescription` pattern well, and the new regression test (`Repeatable_Phrase_On_A_Wrapped_Option_Looking_Line_Is_Found`) exercises the exact scenario from the linked issue.

However, this PR's HEAD commit (`178348153b`) already carries an earlier automated review on this exact same commit that flagged a real, still-unaddressed bug, and I independently traced through the code and confirmed it:

Blocking: InlineDescriptionPattern's lazy quantifier anchors on the wrong column when a value hint has its own multi-space gap

`tools/ModularPipelines.OptionsGenerator/src/ModularPipelines.OptionsGenerator/Scrapers/Cli/CliScraperBase.cs` line 1424-1425:

```csharp
[GeneratedRegex(@"^[ \t]\S.?[ \t]{2,}(?\S.*)$")]
private static partial Regex InlineDescriptionPattern();
```

The doc comment says this should capture the text "after the switches and any value hint," but the lazy .*? stops at the first run of 2+ spaces on the line rather than the last. Any option row with more than one multi-space gap — switch, then a padded value hint, then the description — will have description (and therefore GetDescriptionColumn) anchored at the value hint instead of the real description text.

This isn't hypothetical for this repo: ShellcheckCliScraperTests.cs already contains fixtures in exactly this shape:
```
-i CODE1,CODE2.. --include=CODE1,CODE2.. Consider only given types of warnings
```
Tracing the regex by hand against this line: the lazy .*? expands only up to -i CODE1,CODE2.., matches the first 4-space run, and captures description as --include=CODE1,CODE2.. Consider only given types of warnings — i.e. GetDescriptionColumn returns the column of --include, not Consider. And this path isn't opt-in: ValidateOptionShapes (which calls HelpDeclaresRepeatableOption, the only caller that derives its column from this generic regex) runs for every command in every scraper via TryParseCommandAsync, so any tool whose help text uses this common "short flag / padded value hint / long flag / description" layout will silently get the wrong descriptionColumn — which can absorb an unrelated, later option's "may be repeated" phrasing into the wrong block, or cut the real block off early. Neither failure throws; it just generates the wrong C# type (scalar vs. IEnumerable<T>) for the affected option.

Suggested fix: make the quantifier greedy instead of lazy, so backtracking naturally lands on the last multi-space run in the line, which is the true description separator in aligned help text:
```csharp
[GeneratedRegex(@"^[ \t]\S.[ \t]{2,}(?\S.*)$")]
```
This doesn't change the existing single-gap --env test. Please also add a regression test with a padded value hint (mirroring the Shellcheck fixture shape) feeding into HelpDeclaresRepeatableOption, since the current test only covers a single-gap row.

Investigated and dismissed

• The descriptionColumn is null fallback (any option-row-looking line ends the block) — this reproduces the pre-PR behavior exactly and is explicitly covered by Option_Looking_Rows_Without_A_Known_Description_Column_Start_The_Next_Option, so it's an intentional, tested scope boundary rather than a gap.
• Whether advancing the outer scan's index from inside the inner continuation loop could skip over a later occurrence of the same switch name — traced through both branches and it doesn't: every line absorbed into the current block is already included in the single RepeatableValuePattern check for that block, and the first line that isn't absorbed becomes the very next outer-loop iteration, so no line goes unexamined.

[thomhurst]

Addressed the blocking finding and both threads in 01eed66: InlineDescriptionPattern is replaced by a segment walk (GetInlineDescriptionColumn) that splits on two-plus blanks or a single tab and skips switch segments and single-token value hints before taking the prose column, so padded hints, shellcheck-style dual switch forms and tab-aligned rows all resolve correctly (greedy would instead have anchored on double spaces inside descriptions). Unit cases cover each shape plus two lookahead regressions. Full ModularPipelines.OptionsGenerator.Tests run: 1333/1333.

@claude please re-review exact head 01eed66.

[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

This is the follow-up commit (01eed668) after two prior automated reviews blocked on the same issue: the original InlineDescriptionPattern regex used a lazy .*? before the first [ \t]{2,} run, so any row with a padded value hint before the real description (e.g. the Shellcheck-style -i CODE1,CODE2.. --include=CODE1,CODE2.. Consider only given types) anchored GetDescriptionColumn on the value hint instead of the prose.

That regex is now gone. GetInlineDescriptionColumn replaces it with an explicit segment walk (split on runs of 2+ blanks or a single tab, skip leading switch segments and single-token value hints, return the column of the first genuine prose segment). I traced this by hand against all six Inline_Description_Column_Skips_Switches_And_Value_Hints cases plus the two new lookahead regression tests:

• Padded value hint (--env stringArray Set …) → correctly skips stringArray and lands on Set.
• The exact Shellcheck dual-switch shape (-i CODE1,CODE2.. --include=CODE1,CODE2.. Consider …) → both switch segments are skipped (each starts with -), landing on Consider. This is precisely the case that broke the old regex.
• Tab-aligned rows (\t--env stringArray\tSet …) → resolves correctly since the segment before the tab still starts with -.
• Repeatable_Lookahead_Anchors_On_The_Prose_Column_Not_A_Padded_Value_Hint confirms a deeper-indented-but-still-shallower-than-prose-column option row correctly ends the block instead of absorbing its "may be specified multiple times" phrase.

I also re-verified IsContinuationLine's nullable-declarationIndentation semantics: when descriptionColumn is null (no inline prose found on the declaration line), an option-row-looking continuation line is rejected — reproducing the pre-PR "stop at any option row" fallback exactly, so there's no silent behavior change for rows this heuristic can't classify. The AccumulateWrappedDescription refactor to share GetDescriptionColumn is a straight extraction with no behavior change (its descriptionColumn is not null guard is equivalent to the original's inlineDescription is { } group && !string.IsNullOrWhiteSpace(group.Value) check).

Both previously-flagged blocking findings are resolved, and the new tests pin down exactly the shapes that broke last time so they can't regress silently. protected internal on HelpDeclaresRepeatableOption is a reasonable, narrowly-scoped visibility bump for testability, consistent with IsContinuationLine's existing accessibility.

No further issues found.

[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

This revision replaces the previously-flagged InlineDescriptionPattern regex (which anchored on the first run of 2+ spaces via a lazy quantifier, mis-locating the description column on rows with a padded value hint) with a hand-rolled GetInlineDescriptionColumn that segments the row on runs of 2+ blanks or a lone tab and classifies each segment as a switch, a single-token value hint, or prose.

I traced this by hand against every case in the new tests and against the exact Shellcheck-style fixture (-i CODE1,CODE2.. --include=CODE1,CODE2.. Consider only given types) that broke the old regex:

• Switch-only segments (text[0] == '-') and single-token value hints followed by more segments are both skipped, so the first genuinely multi-word (or trailing) segment is correctly identified as the prose column in all of: single-gap (--quiet Suppress output), padded value hint (--env stringArray Set …), the two-switch-form Shellcheck row, and tab-aligned rows (\t--env stringArray\tSet …).
• IsContinuationLine's new nullable declarationIndentation correctly falls back to "no floor" for the repeatable lookahead while existing callers (AccumulateWrappedDescription) keep passing a concrete int, which implicitly converts — no behavior change there.
• The Repeatable_Lookahead_Anchors_On_The_Prose_Column_Not_A_Padded_Value_Hint test correctly proves a deeper-but-before-the-prose-column option row (--env-file) still ends the block instead of donating "multiple times" to --env.
• Compiles cleanly: ImplicitUsings is enabled for this project so text.Any(char.IsWhiteSpace) resolves via the implicit System.Linq import without a new using, and InternalsVisibleTo already covers the test assembly for the protected internal members exercised directly.

This fully addresses both prior automated reviews on this PR, which blocked on the lazy-quantifier bug in InlineDescriptionPattern — that pattern has been removed entirely rather than patched, and the replacement is exercised by tests covering the exact scenario that was flagged plus additional edge cases (nested value hint, tab-separated rows) that weren't in the original test suite.

No remaining issues found. The change is appropriately scoped to the generator/scraper (per this repo's CLAUDE.md, generated option output itself is untouched) and the fix is generic rather than tool-specific.

[chatgpt-codex-connector]

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Reviewed commit: 01eed66899

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[thomhurst]

Addressed the new Codex thread in d2eeb77 (terminal value hints are no longer taken as prose). Full ModularPipelines.OptionsGenerator.Tests: 1337/1337.

@claude please re-review exact head d2eeb77.

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Reviewed commit: d2eeb77c1a

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[thomhurst]

CI on d2eeb77 failed only in the merge with main: #4658 made an unknown description column permissive, so the repeatable lookahead absorbed every later option row after a declaration without inline prose (the Ansible fixture) and the terminal-hint test. 0c4ab69 merges main and infers the lookahead column from the first accepted wrapped line, as AccumulateWrappedDescription does; the terminal-hint regression now uses a deep prose line and a shallow nested row. Full ModularPipelines.OptionsGenerator.Tests on the merged tree: 1354/1354.

@claude please re-review exact head 0c4ab69.

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Reviewed commit: 0c4ab69222

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[thomhurst]

Addressed the TitleCase-hint thread in 5b60b11 (any lone token is a hint; the wrapped-line column inference from 0c4ab69 covers one-word descriptions). Full ModularPipelines.OptionsGenerator.Tests: 1357/1357.

@claude please re-review exact head 5b60b11.

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Reviewed commit: 5b60b11515

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[thomhurst]

Addressed the sibling-row thread in 4481fe4. Full ModularPipelines.OptionsGenerator.Tests: 1358/1358.

@claude please re-review exact head 4481fe4.

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Reviewed commit: 4481fe40ec

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[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

This PR has been through several rounds already (two earlier automated reviews blocked on the InlineDescriptionPattern lazy-quantifier bug, fixed and cleared as of 01eed668). Since that clear, three more commits (d2eeb77c, 0c4ab692, 5b60b115) tightened GetInlineDescriptionColumn's value-hint classification, and I independently traced the state at 5b60b115 against HelpDeclaresRepeatableOption:

Found (and already fixed on top of this commit): descriptionless option can absorb a sibling row

At 5b60b115, HelpDeclaresRepeatableOption calls IsContinuationLine(..., declarationIndentation: null, ...) unconditionally. When a declaration has no inline description (descriptionColumn is null), wrappedAtDescriptionColumn defaults to true, so any subsequent option-row-looking line — even a genuine sibling at the same indentation, immediately following with no blank line — is accepted as a continuation of the current option's block instead of ending it. Concretely:

--env  stringArray
--env-file=PATH   Read variables from a file; may be specified multiple times

HelpDeclaresRepeatableOption(helpText, "--env", ...) incorrectly returns true at that commit, because --env-file's row (and its "may be specified multiple times" phrase) gets absorbed into --env's search window.

I then checked the PR's actual current head and found commit 4481fe40 ("stop a descriptionless option's lookahead at a sibling row") already fixes exactly this: it computes declarationIndentation up front and applies it as a floor only when descriptionColumn is still unknown and the candidate line looks like an option row — so a same-indentation sibling now correctly stops the block, while deeper wrapped switch-mentions (the original gcloud scenario this PR targets) and same-indent prose (e.g. gcloud's repeatability notes) are unaffected. I hand-traced this against the new regression test (Repeatable_Lookahead_Stops_A_Descriptionless_Option_At_Its_Sibling_Row) plus the four pre-existing scenario tests (Repeatable_Phrase_On_A_Wrapped_Option_Looking_Line_Is_Found, the TitleCase/terminal-value-hint tests, and the tab-separated test) and confirmed no regressions — the floor only ever engages exactly when it should.

Verdict

No outstanding issues against the PR's true current state. The iterative fixes (patches 3-6) each closed a real, narrow edge case with a matching regression test, and the design converges on a coherent rule: bound the lookahead by blank lines, by option rows once a description column is known, and by declaration indentation for option-row candidates while it isn't. Nice use of tightly-targeted unit tests (ContinuationLineTests.cs) pinning each edge case so it can't silently regress.

One process note for whoever reviews this next: the pr-head/ checkout supplied to this review was frozen one commit behind the PR's actual GitHub head (at 5b60b115, missing 4481fe40), so the finding above was cross-checked against gh pr diff's full commit series rather than the local checkout alone.

[thomhurst]

Addressed the remaining Codex threads in 2f3fcff: the lookahead is conservative while the column is unknown (option-looking lines end the block until inline prose fixes the column); the multi-token-metavariable case is a documented limitation of the generic helper, which defers to each scraper's own description grammar. Full ModularPipelines.OptionsGenerator.Tests: 1359/1359.

@claude please re-review exact head 2f3fcff.

[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

This PR has already been through seven automated review rounds (two blocking on the InlineDescriptionPattern lazy-quantifier bug, fixed at 01eed668; three more tightening GetInlineDescriptionColumn's value-hint classification and the descriptionless-sibling-row edge case). I independently re-traced the algorithm at the current head rather than relying on the prior verdicts.

Independent trace of HelpDeclaresRepeatableOption / IsContinuationLine / GetInlineDescriptionColumn

• Sibling-row termination: floor = descriptionColumn is null && looksLikeOptionRow ? declarationIndentation : null correctly applies an indentation floor only while the description column is still unknown and the candidate looks like an option row. Once descriptionColumn is known, wrappedAtDescriptionColumn (indentation ≥ descriptionColumn) already excludes same-indentation siblings, so the floor would be redundant there — confirmed by hand against Repeatable_Lookahead_Stops_A_Descriptionless_Option_At_Its_Sibling_Row and Repeatable_Lookahead_Anchors_On_The_Prose_Column_Not_A_Padded_Value_Hint.
• Value-hint segmentation: GetInlineDescriptionColumn walks segments split on 2+ blanks or a single tab, skipping leading --prefixed segments and single-token (no-whitespace) segments. Traced by hand against the Shellcheck dual-switch fixture (-i CODE1,CODE2.. --include=CODE1,CODE2.. Consider …), the padded-hint case, and tab-aligned rows — all land on the correct prose column, which is the exact bug (lazy regex anchoring on the first 2+-space run) the earlier rounds caught and removed entirely rather than patched.
• Prose-only continuation: when a continuation line doesn't look like an option row, no indentation floor applies at all (block only bounded by blank lines or option rows) — this matches the PR's stated rationale that gcloud's repeatability notes sit at the flag column, not indented under it.
• One-word-description limitation: a genuine one-word description (e.g. Verbose) with nothing wrapped beneath it is indistinguishable from a value hint and returns null from GetInlineDescriptionColumn. This is explicitly called out and tested (Rows_Without_Prose_Have_No_Inline_Description_Column) as an accepted, narrow limitation scoped only to this lookahead (not the general description-extraction path used by scrapers), so it isn't a regression.
• Verified no leftover references to the removed InlineDescriptionPattern regex remain in the tree.

I wasn't able to execute the test project in this sandbox (build/test commands required interactive approval that wasn't available here), but the author's reported ModularPipelines.OptionsGenerator.Tests run (1358/1358) plus the prior automated reviews' hand-traces against the same fixtures give good independent coverage, and my own trace agrees with their conclusions.

Verdict

No outstanding issues found against the PR's current head. The fix is properly scoped to the generator/scraper layer (per this repo's CLAUDE.md, no generated output is hand-edited), reuses the existing IsContinuationLine/AccumulateWrappedDescription patterns instead of inventing a parallel mechanism, and each iterative edge case closed in this review thread has a matching regression test in ContinuationLineTests.cs pinning it down.

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[github-actions]

Review: #4664 — keep repeatable lookahead on wrapped option-looking lines

This PR has been through eight prior automated review rounds (two blocking on the InlineDescriptionPattern lazy-quantifier bug, fixed at 01eed668; five more tightening GetInlineDescriptionColumn's value-hint classification and closing the descriptionless-sibling-row and unknown-column edge cases). The current head (a788068) adds GetLayoutDescriptionColumn on top of the last-reviewed state (4481fe40/2f3fcff74a), so I re-traced this new piece independently rather than re-deriving the earlier history.

What changed since the last CLEAR

HelpDeclaresRepeatableOption now computes layoutColumn = GetLayoutDescriptionColumn(lines) once per call and falls back to it whenever a descriptionless declaration's own GetInlineDescriptionColumn is null. This closes the gap the commit message describes: a row with no inline prose used to leave the description column permanently unknown, so any option-looking first continuation ended the block — even a genuine wrapped mention of another switch that should have stayed part of the description (Go-style help where descriptions start on the next line at a shared column). GetLayoutDescriptionColumn derives that shared column from the most common inline-prose column across the help text's option rows (or, for a descriptionless row, the indentation of the plain-prose line beneath it).

I hand-traced this against all the new fixtures (Repeatable_Lookahead_Borrows_The_Layout_Column_For_A_Descriptionless_Row, Layout_Description_Column_Is_The_Most_Common_Row_Column) and re-verified the earlier-fixed scenarios still hold now that declarationIndentation is always passed as null to IsContinuationLine from this call site: the explicit looksLikeOptionRow && descriptionColumn is null guard at the call site now does the job the indentation floor used to do (a sibling/nested row with no established column anywhere breaks the loop directly), so dropping the floor here isn't a regression — it's a simplification once the column-inference logic was centralized.

Non-blocking observations (not raising these as blocking; no fixture demonstrates a wrong result from either)

1. Global scope of GetLayoutDescriptionColumn. It scans the entire help text's option rows to find one shared column, rather than scoping to the neighbourhood of the option under test. Tools whose help has independently-aligned sections (e.g. Cobra's Flags: vs Global Flags:, which can differ in column if one section's switches are longer) could have a descriptionless row in one section borrow a column derived mostly from the other section. In the cases I could construct, the structural fact that option declarations sit far to the left of any description column already protects against a wrong sibling-row absorption, so I couldn't turn this into an actual failing case against the tools this generator scrapes — flagging it as a design note for whoever hits a real fixture that does trip it, rather than something to fix now.
2. Untested tie-break. GetLayoutDescriptionColumn's .ThenBy(group => group.Key) picks the smallest column when two columns are equally common. A smaller borrowed column is more permissive (indentation >= descriptionColumn is easier to satisfy), which is the direction that caused the false-positive absorptions earlier rounds fixed. None of the Layout_Description_Column_Is_The_Most_Common_Row_Column cases exercise an actual tie, so this branch's behavior isn't pinned by a test. Worth either a regression test asserting the intended tie-break, or reconsidering whether the larger (more conservative) column is the safer default.

Verdict

The core fix is sound, well-motivated by the linked issue, and each of the eight iterative rounds closed a real edge case with a matching unit test in ContinuationLineTests.cs — the design has converged on a coherent, generic rule rather than tool-specific patches. I found no concrete, reproducible bug in the current head; the two notes above are forward-looking robustness suggestions, not defects against any tested or real-world fixture.

[github-actions]

Review

This is a well-scoped, iterative fix to HelpDeclaresRepeatableOption's lookahead, and the design direction (unifying on IsContinuationLine, deriving a shared description column) is sound — it converges several tool-specific hacks into one generic rule, backed by a solid ContinuationLineTests suite. However, hand-tracing GetInlineDescriptionColumn/LooksLikeValueHint turned up a real, unguarded edge case that the current tests don't cover.

Blocking

LooksLikeValueHint misclassifies multi-token value hints as prose, which can corrupt the repeatable-option lookahead (CliScraperBase.cs:1403, used from GetInlineDescriptionColumn at CliScraperBase.cs:~1367-1392).

private static bool LooksLikeValueHint(string text) => !text.Any(char.IsWhiteSpace);

This only recognizes single-token hints (stringArray, String, <path>). A two-word hint like KEY VALUE contains whitespace, so it's classified as prose instead of a hint, and GetInlineDescriptionColumn anchors descriptionColumn on the hint's own column rather than the true prose column further right.

Concrete failure, traced against the actual code:

--config  KEY VALUE   Set a config value
               --other TYPE   Can be repeated to set multiple types

• Segments split on runs of 2+ spaces: --config@0, KEY VALUE@10, Set a config value@22.
• KEY VALUE has a space → LooksLikeValueHint returns false → GetInlineDescriptionColumn returns 10 instead of the real prose column, 22.
• The next line (--other TYPE..., indentation 15) satisfies 10 <= 15 < 22, so IsContinuationLine's wrappedAtDescriptionColumn check (anchored on the wrong column, 10) treats it as wrapped continuation of --config instead of a sibling option row that should end the block.
• --other's "Can be repeated..." phrase gets absorbed into --config's scanned text, so HelpDeclaresRepeatableOption(helpText, "--config", "") incorrectly returns true for the wrong option.

I independently re-verified this by hand-tracing twice against the current CliScraperBase.cs and against ContinuationLineTests.cs in full — every existing "padded/value hint" fixture (Repeatable_Lookahead_Anchors_On_The_Prose_Column_Not_A_Padded_Value_Hint, Repeatable_Lookahead_Treats_A_TitleCase_Value_Hint_As_A_Hint, Repeatable_Lookahead_Does_Not_Anchor_On_A_Terminal_Value_Hint) uses a single-token hint. None exercise a multi-token hint, so nothing in the suite catches this.

Suggested fix direction: rather than patching LooksLikeValueHint with more word-count heuristics (which is exactly the kind of fragile, single-purpose rule this PR is trying to move away from), consider extending it to classify a whole run of hint-like tokens (e.g. all-uppercase or <...>-wrapped tokens separated by single spaces) as one hint, so KEY VALUE is judged as a unit rather than by whitespace presence alone. Alternatively, this heuristic and GetDescriptionColumn's regex-capture-based column detection (see below) are two independent ways of finding the same thing — converging them would fix this class of bug by construction instead of adding a second bespoke rule for multi-token hints.

Non-blocking (design notes, not regressions)

1. GetInlineDescriptionColumn duplicates the description-column concept already covered by GetDescriptionColumn/AccumulateWrappedDescription (regex-capture-based, precise) with a second, heuristic, segment-splitting detector used only inside HelpDeclaresRepeatableOption. Two independent mechanisms for the same concept means future scraper-format fixes have to be reasoned about and tested twice, and — as above — lets them diverge for the same row. Worth considering whether HelpDeclaresRepeatableOption can reuse the capture-based path instead.
2. GetLayoutDescriptionColumn re-scans the full help text on every call (CliScraperBase.cs:~1169), and HelpDeclaresRepeatableOption is invoked once per non-flag/non-boolean option from several call sites (ValidateOptionShapes, GcloudCliScraper.NormalizeRepeatability, CobraCliScraper.IsRepeatableOption, etc.). For a help text with many options (gcloud, which this PR explicitly targets), this turns an O(lines) computation into O(options × lines), redundantly, at multiple call sites. Not a correctness issue, but worth hoisting/caching per help-text if it shows up in scrape times.
3. Reiterating a non-blocking note from the prior review at this same head: GetLayoutDescriptionColumn's global scope (scanning the whole help text rather than the option's own section) could in principle let a descriptionless row in one section (e.g. Cobra's Global Flags:) borrow a column derived mostly from another section (Flags:). No fixture demonstrates a wrong result today, so this remains a forward-looking robustness note rather than a defect.

Verdict

The multi-token value-hint gap above is a genuine, reproducible correctness bug in the new lookahead logic (confirmed by independent hand-tracing), even though no current fixture exercises it. Recommend adding a ContinuationLineTests case with a multi-token hint (e.g. KEY VALUE) before merging, alongside a fix to LooksLikeValueHint or a consolidation with GetDescriptionColumn.

[thomhurst]

Addressed the blocking finding in 1547bd6: LooksLikeValueHint now also accepts a run of placeholder-shaped tokens (uppercase, <...>/[...]/{...}, ellipsis), so KEY VALUE, <key> <value> and PATH... are hints and the column lands on the prose. Your exact fixture is now Repeatable_Lookahead_Anchors_On_The_Prose_Column_Not_A_Multi_Token_Value_Hint (--config false, --other true), plus column/no-column cases for the hint shapes. Continuation tests (48) and the Scrapers namespace (692) pass.

On the design notes:

1. GetInlineDescriptionColumn vs GetDescriptionColumn: the latter needs the scraper's own option regex and its desc capture; the repeatable lookahead runs over raw help for switches the scraper may not have modelled, so it cannot reuse that capture. Keeping the lookahead's detector separate is deliberate; folding both onto one column model is a reasonable follow-up once the remaining scrapers share one option regex (Port the remaining CLI scrapers onto the shared wrapped-description helper #4646/Adopt the shared clap help helpers in CargoCliScraper and consolidate the private enum factories #4712 territory).
2. GetLayoutDescriptionColumn per call: it is a single pass over a help text of a few hundred lines, invoked once per non-flag option; measured cost is negligible next to the process spawn per --help. Not caching by help text keeps the method pure.
3. Global scope: accepted trade-off. Blank lines and option rows still bound every block, so a column learnt from another section only ever decides whether an option-looking line at that column is prose; a shallower row still ends the block.

[thomhurst]

Rebased onto main 6dc510b and pushed 3a78c9a.

Review 5665540772's source concern is addressed: the branch now includes main's IsRepeatedClapDefault/RemoveRepeatedInlineClapDefaults implementation and its full pnpm regression coverage. The earlier review compared two branch tips; these fixes had landed on main after the old branch fork. The rebase also brings main's generated pnpm snapshot containing the deduplicated Sbom description. No generated file was hand-edited.

Conflict resolution preserves main's Terraform primary constructor, ConfigureAwait(false), isolated manifest fixtures, and independent fallback circuit breaker around the configured process executor. One old test initially failed because it registered only ICliCommandExecutor; its recording fixture now implements the configured ProcessCliCommandExecutor registration, using the same pattern as main's circuit-breaker regression.

Validation: all 983 scraper tests, 315 type-detection tests, and 11 focused timeout/circuit-breaker/Terraform-concurrency checks pass. Release generator build has zero warnings/errors. Scoped default formatting and diff checks pass. Severity-info verification still reports the same seven existing Packer diagnostics outside changed lines. The earlier 2 GB full-suite limit remains deferred to CI.

Generator fingerprint: a9854ae34db30ae3459d7b1259744486a82638988ee113da25800dcb08ecff1a. Full 47-tool final regeneration remains outstanding under #4655; existing generation threads stay open. The cancelled feature-branch matrix was not resumed. Source prerequisites must land separately before fresh latest-main generation, as current repository guidance requires.

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Regenerate snapshots from this exact generator source

Fresh evidence after the earlier queued-generation thread is that the reviewed commit records the intermediate fingerprint 50a6ccfc… in all 20 updated manifests, while applying the repository's Get-GeneratedOptionsSourceFingerprint algorithm to db540d yields a9854ae3…; none of the 44 manifests matches the final source. Consequently, later shared-parser fixes are absent from the committed generated APIs, and the repository's freshness check will reject these snapshots when compared with this source. Regenerate every affected integration from this exact generator revision.

AGENTS.md reference: AGENTS.md:L34-L35

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[github-actions]

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