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feat(commands): project per-stage options out of the CLI structs (R1e-a) - #744

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Prerequisite for porting the chain builder. Based on main-runall rather than stacked on #736/#741/#743 — it touches only src/lib/commands/, disjoint from those, so it can merge in parallel.

Why

The chain builder needs each stage's tuning knobs without depending on how they were supplied, so a chain can be constructed with no CLI struct behind it. Today those knobs are reachable only as fields on the clap command structs.

This adds one plain <Command>Options struct per stage plus a to_<command>_options() projection, for correct, group, simplex, duplex, codec, filter, zipper.

Why these are not clap::Args

Flattening them into the command structs — the shape the fused command will eventually want, so it can expose --<stage>::<flag> — would move the fields off those structs and rewrite every self.<field> reference and its tests. That buys the chain builder nothing: it only ever reads the values, and never touches clap. So that refactor is deferred to the change that actually needs prefixed flags.

The consequence is that this PR is additive: no CLI surface moves, no existing field is relocated, and the existing suite covers the seven commands unchanged. The trade is that those fields get touched twice — once here, once when they become flattened Args. The field names do not change, so nothing downstream churns.

Resolved vs. raw values

Two GroupOptions fields hold resolved values, because grouping cannot be configured from the raw flags alone:

  • min_map_q applies the default execute would otherwise apply at run time.
  • effective_strategy / effective_edits carry the --no-umi and identity-implies-zero-edits rules.

Both now come from GroupReadsByUmi::resolved_min_map_q and resolve_strategy_and_edits, extracted from execute so the command and the chain builder read them from one place rather than duplicating the rules. execute keeps its own validation and its override log line; the new methods only compute. This is the only behavior-adjacent change in the PR, and a case table pins both sets of rules as a regression test for the extraction.

GroupOptions::index_threshold keeps the richer IndexThreshold type rather than a bare count, since the flag also accepts always / never.

Testing

Each projection has a test that drives the command through try_parse_from rather than a struct literal, with non-default values throughout — so a renamed or unwired flag fails the test instead of silently compiling, and a field read from the wrong source fails rather than coincidentally matching its default. Zipper additionally has a defaults test, since an all-non-default assertion cannot catch a field hard-coded to a non-default constant.

Strategy gains PartialEq/Eq (additive, fieldless enum) so the resolution table can assert on it.

8322 → 8339 tests, all passing. ci-fmt, ci-lint, ci-tag-literals, ci-doc (with RUSTDOCFLAGS="-D warnings"), and publish-crates.sh --check all pass.

Deliberately not included

warn_unwired_pipeline_flags is part of the same upstream surface, but it warns that --scheduler is a deprecated no-op. On this branch the pluggable scheduler is still live — SchedulerOptions::scheduler is a SchedulerStrategy with a default, not an Option, and unified_pipeline still consumes it. Porting the warning now would announce a removal that has not happened, so it travels with the change that actually removes it.

Risk: command output changes: none; unsafe: none, and CLAUDE.md allowlist: unchanged; memory bounds, queue capacity, and thread/backpressure policy: none. Fix: add stage option projections without changing CLI interfaces.

  • Added CorrectOptions, GroupOptions, SimplexOptions, DuplexOptions, CodecOptions, FilterOptions, and ZipperOptions.
  • Added to_*_options() methods for each stage.
  • Shared group resolution for MAPQ defaults, UMI strategy, and edit behavior while preserving validation and logging.
  • Added projection and default-value tests.
  • Added PartialEq and Eq to Strategy.

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  • src/lib/commands/codec.rs
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Walkthrough

The change adds public stage option structs and CLI-to-configuration projection methods. It also centralizes group option resolution and adds tests for defaults, overrides, and projected values.

Changes

Stage option projections

Layer / File(s) Summary
Stage option projections
src/lib/commands/{codec,correct,duplex,filter,simplex,zipper}.rs
Each command exposes a flat public options struct and a projection method. Tests verify custom values, defaults, nested options, and flattened fields.

Group configuration resolution

Layer / File(s) Summary
Group configuration resolution
crates/fgumi-umi/src/assigner.rs, src/lib/commands/group.rs
Strategy derives equality traits. Group helpers resolve MAPQ, strategy, and edit values. execute uses these helpers, and tests cover defaults, overrides, --no-umi, and option projection.

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

Merge Risk: 🟡 Moderate · up to 11fdb

The new stage configuration projections do not yet preserve all CLI behavior and still expose CLI-specific types, so future chain construction could silently omit options or remain coupled to the command layer. Merge should wait for these bounded API and behavior gaps to be fixed or explicitly accepted.

Possibly related PRs

Suggested labels: fgumi group

🚥 Pre-merge checks | ✅ 3
✅ Passed checks (3 passed)
Check name Status Explanation
Title check ✅ Passed The title uses the allowed feat type, a relevant commands scope, and a lowercase imperative description that matches the main change without a period.
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.

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@@              Coverage Diff               @@
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Actionable comments posted: 3

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Inline comments:
In `@src/lib/commands/codec.rs`:
- Around line 284-356: Propagate the consensus tie rule into all stage option
structs: in src/lib/commands/codec.rs lines 284-356, add the matching tie_rule
field to CodecOptions and copy self.consensus.tie_rule in to_codec_options; make
the equivalent changes in src/lib/commands/duplex.rs lines 230-298 for
DuplexOptions/to_duplex_options and src/lib/commands/simplex.rs lines 243-311
for SimplexOptions/to_simplex_options.

In `@src/lib/commands/correct.rs`:
- Around line 333-386: Preserve the CorrectUmis target selection in the
projection by adding the target field to CorrectOptions and populating it from
CorrectUmis::to_correct_options, so --target barcode and other target values
reach chain builders. Update the nearby documentation to describe UMI-correction
options rather than consensus-calling knobs.
- Around line 1748-1788: Update the to_correct_options_carries_every_tuning_flag
test to pass a non-default value such as 5 for --max-mismatches and assert that
opts.max_mismatches equals 5, ensuring CorrectUmis::to_correct_options projects
the CLI value rather than relying on the default.

Apply the same fix in `@src/lib/commands/filter.rs` around lines 1230 - 1292: The
same test weakness affects two unset filter flags.
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  • crates/fgumi-umi/src/assigner.rs
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  • src/lib/commands/group.rs
  • src/lib/commands/simplex.rs
  • src/lib/commands/zipper.rs

Comment thread src/lib/commands/codec.rs
Comment thread src/lib/commands/correct.rs
Comment thread src/lib/commands/correct.rs
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Actionable comments posted: 1

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Inline comments:
In `@src/lib/commands/codec.rs`:
- Around line 293-357: Thread the parsed allow_unmapped setting through the
public options projections for Codec::to_codec_options,
Duplex::to_duplex_options, and Simplex::to_simplex_options, adding the field to
each corresponding options struct. Add projection assertions for both enabled
and default-disabled values in src/lib/commands/codec.rs lines 293-357,
src/lib/commands/duplex.rs lines 242-298, and src/lib/commands/simplex.rs lines
255-311; all three sites require the same direct change.
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  • src/lib/commands/simplex.rs

Comment thread src/lib/commands/codec.rs
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Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents
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only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@src/lib/commands/codec.rs`:
- Around line 307-350: Remove CLI-domain types from the public stage option
structs: in src/lib/commands/codec.rs lines 307-350, store the domain tie-rule
type and convert self.consensus.tie_rule in Codec::to_codec_options(); in
src/lib/commands/duplex.rs lines 256-303 and src/lib/commands/simplex.rs lines
269-316, store domain tie-rule and methylation-mode types and convert both
parsed values in each to_*_options() method using the existing From conversions.
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Comment thread src/lib/commands/codec.rs Outdated
The chain builder needs each stage's tuning knobs without depending on
how they were supplied, so it can construct a chain with no CLI struct
behind it. This adds one plain `<Command>Options` struct per stage, plus
a `to_<command>_options()` method that projects the parsed flags into it,
for correct, group, simplex, duplex, codec, filter, and zipper.

The structs deliberately do not derive `clap::Args`. Flattening them into
the command structs would move the fields off those structs and rewrite
every `self.<field>` reference and its tests, which buys the chain builder
nothing — it only ever reads the values. That refactor belongs with the
fused command that actually needs prefixed `--<stage>::<flag>` flags. As a
result this change is additive: no CLI surface moves, and the existing
suite covers the commands unchanged.

Two option structs hold resolved rather than raw values, because grouping
cannot be configured from the raw flags alone:

- `GroupOptions::min_map_q` applies the default `execute` would apply.
- `GroupOptions::effective_strategy` / `effective_edits` carry the
  `--no-umi` and identity-implies-zero-edits rules.

Both now come from `GroupReadsByUmi::resolved_min_map_q` and
`resolve_strategy_and_edits`, extracted from `execute` so the command and
the chain builder read them from one place instead of duplicating the
rules. `execute` keeps its own validation and override logging; the new
methods only compute. A case table pins both sets of rules.

`GroupOptions::index_threshold` keeps the richer `IndexThreshold` type
rather than a bare count: the flag also accepts `always` / `never`, which
a number cannot express.

Each projection is covered by a test that drives the command through
`try_parse_from` rather than a struct literal, so a renamed or unwired
flag fails the test instead of silently compiling.

`Strategy` gains `PartialEq`/`Eq` so the resolution table can assert on it.
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nh13 force-pushed the nh/runall-16-command-options branch from 2b85936 to 11fdb48 Compare August 16, 2026 05:14
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@nh13 nh13 added enhancement New feature or request rust Pull requests that update rust code fgumi runall labels Aug 16, 2026
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nh13 merged commit 2fa3969 into main-runall Aug 16, 2026
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nh13 added a commit that referenced this pull request Aug 19, 2026
The chain builder needs each stage's tuning knobs without depending on
how they were supplied, so it can construct a chain with no CLI struct
behind it. This adds one plain `<Command>Options` struct per stage, plus
a `to_<command>_options()` method that projects the parsed flags into it,
for correct, group, simplex, duplex, codec, filter, and zipper.

The structs deliberately do not derive `clap::Args`. Flattening them into
the command structs would move the fields off those structs and rewrite
every `self.<field>` reference and its tests, which buys the chain builder
nothing — it only ever reads the values. That refactor belongs with the
fused command that actually needs prefixed `--<stage>::<flag>` flags. As a
result this change is additive: no CLI surface moves, and the existing
suite covers the commands unchanged.

Two option structs hold resolved rather than raw values, because grouping
cannot be configured from the raw flags alone:

- `GroupOptions::min_map_q` applies the default `execute` would apply.
- `GroupOptions::effective_strategy` / `effective_edits` carry the
  `--no-umi` and identity-implies-zero-edits rules.

Both now come from `GroupReadsByUmi::resolved_min_map_q` and
`resolve_strategy_and_edits`, extracted from `execute` so the command and
the chain builder read them from one place instead of duplicating the
rules. `execute` keeps its own validation and override logging; the new
methods only compute. A case table pins both sets of rules.

`GroupOptions::index_threshold` keeps the richer `IndexThreshold` type
rather than a bare count: the flag also accepts `always` / `never`, which
a number cannot express.

Each projection is covered by a test that drives the command through
`try_parse_from` rather than a struct literal, so a renamed or unwired
flag fails the test instead of silently compiling.

`Strategy` gains `PartialEq`/`Eq` so the resolution table can assert on it.
nh13 added a commit that referenced this pull request Aug 19, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 19, 2026
The chain builder needs each stage's tuning knobs without depending on
how they were supplied, so it can construct a chain with no CLI struct
behind it. This adds one plain `<Command>Options` struct per stage, plus
a `to_<command>_options()` method that projects the parsed flags into it,
for correct, group, simplex, duplex, codec, filter, and zipper.

The structs deliberately do not derive `clap::Args`. Flattening them into
the command structs would move the fields off those structs and rewrite
every `self.<field>` reference and its tests, which buys the chain builder
nothing — it only ever reads the values. That refactor belongs with the
fused command that actually needs prefixed `--<stage>::<flag>` flags. As a
result this change is additive: no CLI surface moves, and the existing
suite covers the commands unchanged.

Two option structs hold resolved rather than raw values, because grouping
cannot be configured from the raw flags alone:

- `GroupOptions::min_map_q` applies the default `execute` would apply.
- `GroupOptions::effective_strategy` / `effective_edits` carry the
  `--no-umi` and identity-implies-zero-edits rules.

Both now come from `GroupReadsByUmi::resolved_min_map_q` and
`resolve_strategy_and_edits`, extracted from `execute` so the command and
the chain builder read them from one place instead of duplicating the
rules. `execute` keeps its own validation and override logging; the new
methods only compute. A case table pins both sets of rules.

`GroupOptions::index_threshold` keeps the richer `IndexThreshold` type
rather than a bare count: the flag also accepts `always` / `never`, which
a number cannot express.

Each projection is covered by a test that drives the command through
`try_parse_from` rather than a struct literal, so a renamed or unwired
flag fails the test instead of silently compiling.

`Strategy` gains `PartialEq`/`Eq` so the resolution table can assert on it.
nh13 added a commit that referenced this pull request Aug 19, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 19, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 22, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 22, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 22, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 22, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.
nh13 added a commit that referenced this pull request Aug 23, 2026
The chain builder needs each stage's tuning knobs without depending on
how they were supplied, so it can construct a chain with no CLI struct
behind it. This adds one plain `<Command>Options` struct per stage, plus
a `to_<command>_options()` method that projects the parsed flags into it,
for correct, group, simplex, duplex, codec, filter, and zipper.

The structs deliberately do not derive `clap::Args`. Flattening them into
the command structs would move the fields off those structs and rewrite
every `self.<field>` reference and its tests, which buys the chain builder
nothing — it only ever reads the values. That refactor belongs with the
fused command that actually needs prefixed `--<stage>::<flag>` flags. As a
result this change is additive: no CLI surface moves, and the existing
suite covers the commands unchanged.

Two option structs hold resolved rather than raw values, because grouping
cannot be configured from the raw flags alone:

- `GroupOptions::min_map_q` applies the default `execute` would apply.
- `GroupOptions::effective_strategy` / `effective_edits` carry the
  `--no-umi` and identity-implies-zero-edits rules.

Both now come from `GroupReadsByUmi::resolved_min_map_q` and
`resolve_strategy_and_edits`, extracted from `execute` so the command and
the chain builder read them from one place instead of duplicating the
rules. `execute` keeps its own validation and override logging; the new
methods only compute. A case table pins both sets of rules.

`GroupOptions::index_threshold` keeps the richer `IndexThreshold` type
rather than a bare count: the flag also accepts `always` / `never`, which
a number cannot express.

Each projection is covered by a test that drives the command through
`try_parse_from` rather than a struct literal, so a renamed or unwired
flag fails the test instead of silently compiling.

`Strategy` gains `PartialEq`/`Eq` so the resolution table can assert on it.
nh13 added a commit that referenced this pull request Aug 23, 2026
Adds `pipeline/steps/correct/`, the typed `Step` wrapping UMI correction,
completing the mid-step group #743 left unfinished. `steps/mod.rs` recorded
`correct/` as blocked on the command-layer options refactor; `CorrectOptions`
arrived with #744, so the block is lifted.

The step needs a little more of `commands::correct` than that type alone.
`feat-runall` refactored that file and `main` has since developed it
independently -- main's copy is the larger of the two -- so taking the upstream
version wholesale would revert main's work. Widen only what the step names
instead:

  - `pub(crate)` on `credit_umi_metrics`, so the step and the legacy `execute`
    path share ONE definition of fgbio's per-segment UMI accounting rather than
    each carrying its own.
  - `pub(crate)` on `RejectionReason`, `TemplateCorrection` (plus its `matched`,
    `matches` and `rejection_reason` fields), and the `CollectedCorrectMetrics`
    fields, plus the three associated functions the step calls.
  - `CollectedCorrectMetrics::merge_into`, to fold the per-thread accumulator
    slots once the pipeline has drained. This is genuinely new -- the legacy
    path aggregates its slots inline.

The legacy path is unchanged.

Metrics follow `execute` exactly, which follows fgbio: every template counts
once in `templates_processed`; per-UMI crediting happens for every template
that reached matching, *before* the keep/reject decision, so a template
rejected on one segment still credits its matched segments and credits the
all-`N` bucket only for the segments that actually failed; and missing-UMI and
wrong-length templates credit no per-UMI bucket at all
(`CorrectUmis.scala:199-202`). `per_umi_crediting_matches_fgbio` pins each of
these; its `AAAA-TTTT` case is the discriminating one, since a template
rejected on its second segment must still credit `AAAA` for its first.

Both output shapes share one `run_batch`, which takes an optional rejects sink,
so that accounting has a single definition and cannot drift between them.

Forward-ports one behaviour the ported source predates: `apply_correction_to_raw`
grew an `original_tag` parameter, so `CorrectStepConfig` carries `original_tag`
beside `umi_tag`, both derived from `Target`.

The module is `#![allow(dead_code)]` until the command rewiring gives it a
caller: the surface cannot be `pub` without leaking `pub(crate)` command
internals. The tests build `CorrectOptions` explicitly rather than via
`Default`, which upstream got from the `multi_options` macro -- deriving it
here would yield `cache_size: 0`, contradicting the flag's `default_value` and
tripping a ported assertion that the default is non-zero.

No command is rewired, so nothing executes on the ported path yet; that starts
at R2.

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